105e627dcSAndy Fiddaman# tzdb data for North and Central America and environs
205e627dcSAndy Fiddaman
3707182d7SNobutomo Nakano# This file is in the public domain, so clarified as of
4707182d7SNobutomo Nakano# 2009-05-17 by Arthur David Olson.
5f430f59aSrobbin
67c478bd9Sstevel@tonic-gate# also includes Central America and the Caribbean
77c478bd9Sstevel@tonic-gate
86f8e8937SDan McDonald# This file is by no means authoritative; if you think you know better,
97c478bd9Sstevel@tonic-gate# go ahead and edit the file (and please send any changes to
106f8e8937SDan McDonald# tz@iana.org for general use in the future).  For more, please see
116f8e8937SDan McDonald# the file CONTRIBUTING in the tz distribution.
127c478bd9Sstevel@tonic-gate
1380868c53Srobbin# From Paul Eggert (1999-03-22):
147c478bd9Sstevel@tonic-gate# A reliable and entertaining source about time zones is
157c478bd9Sstevel@tonic-gate# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).
167c478bd9Sstevel@tonic-gate
177c478bd9Sstevel@tonic-gate###############################################################################
187c478bd9Sstevel@tonic-gate
197c478bd9Sstevel@tonic-gate# United States
207c478bd9Sstevel@tonic-gate
217c478bd9Sstevel@tonic-gate# From Paul Eggert (1999-03-31):
227c478bd9Sstevel@tonic-gate# Howse writes (pp 121-125) that time zones were invented by
237c478bd9Sstevel@tonic-gate# Professor Charles Ferdinand Dowd (1825-1904),
247c478bd9Sstevel@tonic-gate# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY).
25a43ba736SRobert Mustacchi# His pamphlet "A System of National Time for Railroads" (1870)
267c478bd9Sstevel@tonic-gate# was the result of his proposals at the Convention of Railroad Trunk Lines
277c478bd9Sstevel@tonic-gate# in New York City (1869-10).  His 1870 proposal was based on Washington, DC,
287c478bd9Sstevel@tonic-gate# but in 1872-05 he moved the proposed origin to Greenwich.
29c2d5ab87SDan McDonald
303508b934SYuri Pankov# From Paul Eggert (2018-03-20):
31c2d5ab87SDan McDonald# Dowd's proposal left many details unresolved, such as where to draw
32c2d5ab87SDan McDonald# lines between time zones.  The key individual who made time zones
33c2d5ab87SDan McDonald# work in the US was William Frederick Allen - railway engineer,
34c2d5ab87SDan McDonald# managing editor of the Travelers' Guide, and secretary of the
35c2d5ab87SDan McDonald# General Time Convention, a railway standardization group.  Allen
36c2d5ab87SDan McDonald# spent months in dialogs with scientific and railway leaders,
37c2d5ab87SDan McDonald# developed a workable plan to institute time zones, and presented it
38c2d5ab87SDan McDonald# to the General Time Convention on 1883-04-11, saying that his plan
39c2d5ab87SDan McDonald# meant "local time would be practically abolished" - a plus for
40c2d5ab87SDan McDonald# railway scheduling.  By the next convention on 1883-10-11 nearly all
413508b934SYuri Pankov# railroads had agreed and it took effect on 1883-11-18.  That Sunday
423508b934SYuri Pankov# was called the "day of two noons", as some locations observed noon
433508b934SYuri Pankov# twice.  Allen witnessed the transition in New York City, writing:
44c2d5ab87SDan McDonald#
45c2d5ab87SDan McDonald#   I heard the bells of St. Paul's strike on the old time.  Four
46c2d5ab87SDan McDonald#   minutes later, obedient to the electrical signal from the Naval
47c2d5ab87SDan McDonald#   Observatory ... the time-ball made its rapid descent, the chimes
48c2d5ab87SDan McDonald#   of old Trinity rang twelve measured strokes, and local time was
49c2d5ab87SDan McDonald#   abandoned, probably forever.
50c2d5ab87SDan McDonald#
51c2d5ab87SDan McDonald# Most of the US soon followed suit.  See:
52c2d5ab87SDan McDonald# Bartky IR. The adoption of standard time. Technol Cult 1989 Jan;30(1):25-56.
5305e627dcSAndy Fiddaman# https://dx.doi.org/10.2307/3105430
547c478bd9Sstevel@tonic-gate
5580868c53Srobbin# From Paul Eggert (2005-04-16):
5680868c53Srobbin# That 1883 transition occurred at 12:00 new time, not at 12:00 old time.
5780868c53Srobbin# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005).
5880868c53Srobbin
592f9aa4a7Srobbin# From Paul Eggert (2006-03-22):
607c478bd9Sstevel@tonic-gate# A good source for time zone historical data in the US is
617c478bd9Sstevel@tonic-gate# Thomas G. Shanks, The American Atlas (5th edition),
627c478bd9Sstevel@tonic-gate# San Diego: ACS Publications, Inc. (1991).
637c478bd9Sstevel@tonic-gate# Make sure you have the errata sheet; the book is somewhat useless without it.
642f9aa4a7Srobbin# It is the source for most of the pre-1991 US entries below.
657c478bd9Sstevel@tonic-gate
667c478bd9Sstevel@tonic-gate# From Paul Eggert (2001-03-06):
677c478bd9Sstevel@tonic-gate# Daylight Saving Time was first suggested as a joke by Benjamin Franklin
68a43ba736SRobert Mustacchi# in his whimsical essay "An Economical Project for Diminishing the Cost
69a43ba736SRobert Mustacchi# of Light" published in the Journal de Paris (1784-04-26).
707c478bd9Sstevel@tonic-gate# Not everyone is happy with the results:
717c478bd9Sstevel@tonic-gate#
727c478bd9Sstevel@tonic-gate#	I don't really care how time is reckoned so long as there is some
737c478bd9Sstevel@tonic-gate#	agreement about it, but I object to being told that I am saving
747c478bd9Sstevel@tonic-gate#	daylight when my reason tells me that I am doing nothing of the kind.
757c478bd9Sstevel@tonic-gate#	I even object to the implication that I am wasting something
767c478bd9Sstevel@tonic-gate#	valuable if I stay in bed after the sun has risen.  As an admirer
777c478bd9Sstevel@tonic-gate#	of moonlight I resent the bossy insistence of those who want to
787c478bd9Sstevel@tonic-gate#	reduce my time for enjoying it.  At the back of the Daylight Saving
797c478bd9Sstevel@tonic-gate#	scheme I detect the bony, blue-fingered hand of Puritanism, eager
807c478bd9Sstevel@tonic-gate#	to push people into bed earlier, and get them up earlier, to make
817c478bd9Sstevel@tonic-gate#	them healthy, wealthy and wise in spite of themselves.
827c478bd9Sstevel@tonic-gate#
836f8e8937SDan McDonald#	 -- Robertson Davies, The diary of Samuel Marchbanks,
8480868c53Srobbin#	   Clarke, Irwin (1947), XIX, Sunday
857c478bd9Sstevel@tonic-gate#
867c478bd9Sstevel@tonic-gate# For more about the first ten years of DST in the United States, see
876f8e8937SDan McDonald# Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint
886f8e8937SDan McDonald# (Carnegie Library of Pittsburgh, 1927).
895254d4faSAndy Fiddaman# https://web.archive.org/web/20160517155308/http://www.clpgh.org/exhibit/dst.html
907c478bd9Sstevel@tonic-gate#
917c478bd9Sstevel@tonic-gate# Shanks says that DST was called "War Time" in the US in 1918 and 1919.
927c478bd9Sstevel@tonic-gate# However, DST was imposed by the Standard Time Act of 1918, which
937c478bd9Sstevel@tonic-gate# was the first nationwide legal time standard, and apparently
947c478bd9Sstevel@tonic-gate# time was just called "Standard Time" or "Daylight Saving Time".
957c478bd9Sstevel@tonic-gate
96374df668SAndy Fiddaman# From Paul Eggert (2019-06-04):
97374df668SAndy Fiddaman# Here is the legal basis for the US federal rules.
98374df668SAndy Fiddaman# * Public Law 65-106 (1918-03-19) implemented standard and daylight saving
99374df668SAndy Fiddaman#   time for the first time across the US, springing forward on March's last
100374df668SAndy Fiddaman#   Sunday and falling back on October's last Sunday.
101374df668SAndy Fiddaman#   https://www.loc.gov/law/help/statutes-at-large/65th-congress/session-2/c65s2ch24.pdf
102374df668SAndy Fiddaman# * Public Law 66-40 (1919-08-20) repealed DST on October 1919's last Sunday.
103374df668SAndy Fiddaman#   https://www.loc.gov/law/help/statutes-at-large/66th-congress/session-1/c66s1ch51.pdf
104374df668SAndy Fiddaman# * Public Law 77-403 (1942-01-20) started wartime DST on 1942-02-09.
105374df668SAndy Fiddaman#   https://www.loc.gov/law/help/statutes-at-large/77th-congress/session-2/c77s2ch7.pdf
106374df668SAndy Fiddaman# * Public Law 79-187 (1945-09-25) ended wartime DST on 1945-09-30.
107374df668SAndy Fiddaman#   https://www.loc.gov/law/help/statutes-at-large/79th-congress/session-1/c79s1ch388.pdf
108374df668SAndy Fiddaman# * Public Law 89-387 (1966-04-13) reinstituted a national standard for DST,
109374df668SAndy Fiddaman#   from April's last Sunday to October's last Sunday, effective 1967.
110374df668SAndy Fiddaman#   https://www.govinfo.gov/content/pkg/STATUTE-80/pdf/STATUTE-80-Pg107.pdf
111374df668SAndy Fiddaman# * Public Law 93-182 (1973-12-15) moved the 1974 spring-forward to 01-06.
112374df668SAndy Fiddaman#   https://www.govinfo.gov/content/pkg/STATUTE-87/pdf/STATUTE-87-Pg707.pdf
113374df668SAndy Fiddaman# * Public Law 93-434 (1974-10-05) moved the 1975 spring-forward to
114374df668SAndy Fiddaman#   February's last Sunday.
115374df668SAndy Fiddaman#   https://www.govinfo.gov/content/pkg/STATUTE-88/pdf/STATUTE-88-Pg1209.pdf
116374df668SAndy Fiddaman# * Public Law 99-359 (1986-07-08) moved the spring-forward to April's first
117374df668SAndy Fiddaman#   Sunday.
118374df668SAndy Fiddaman#   https://www.govinfo.gov/content/pkg/STATUTE-100/pdf/STATUTE-100-Pg764.pdf
119374df668SAndy Fiddaman# * Public Law 109-58 (2005-08-08), effective 2007, moved the spring-forward
120374df668SAndy Fiddaman#   to March's second Sunday and the fall-back to November's first Sunday.
121374df668SAndy Fiddaman#   https://www.govinfo.gov/content/pkg/PLAW-109publ58/pdf/PLAW-109publ58.pdf
122374df668SAndy Fiddaman# All transitions are at 02:00 local time.
1237c478bd9Sstevel@tonic-gate
1247c478bd9Sstevel@tonic-gate# From Arthur David Olson:
1257c478bd9Sstevel@tonic-gate# Before the Uniform Time Act of 1966 took effect in 1967, observance of
1267c478bd9Sstevel@tonic-gate# Daylight Saving Time in the US was by local option, except during wartime.
1277c478bd9Sstevel@tonic-gate
1287c478bd9Sstevel@tonic-gate# From Arthur David Olson (2000-09-25):
1297c478bd9Sstevel@tonic-gate# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama.
1307c478bd9Sstevel@tonic-gate# In the introduction, Oboler spoke of "Eastern Peace Time."
1316f8e8937SDan McDonald# An AltaVista search turned up:
132b654b02dSYuri Pankov# https://web.archive.org/web/20000926032210/http://rowayton.org/rhs/hstaug45.html
1337c478bd9Sstevel@tonic-gate# "When the time is announced over the radio now, it is 'Eastern Peace
1347c478bd9Sstevel@tonic-gate# Time' instead of the old familiar 'Eastern War Time.'  Peace is wonderful."
1356f8e8937SDan McDonald# (August 1945) by way of confirmation.
136b654b02dSYuri Pankov#
137b654b02dSYuri Pankov# From Paul Eggert (2017-09-23):
138b654b02dSYuri Pankov# This was the V-J Day issue of the Clamdigger, a Rowayton, CT newsletter.
1397c478bd9Sstevel@tonic-gate
14080868c53Srobbin# From Joseph Gallant citing
1417c478bd9Sstevel@tonic-gate# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987):
1427c478bd9Sstevel@tonic-gate# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set
1437c478bd9Sstevel@tonic-gate# to switch to London for Attlee's address, but the American people
1447c478bd9Sstevel@tonic-gate# never got to hear his speech live. According to one press account,
1457c478bd9Sstevel@tonic-gate# CBS' Bob Trout was first to announce the word of Japan's surrender,
1467c478bd9Sstevel@tonic-gate# but a few seconds later, NBC, ABC and Mutual also flashed the word
1477c478bd9Sstevel@tonic-gate# of surrender, all of whom interrupting the bells of Big Ben in
1487c478bd9Sstevel@tonic-gate# London which were to precede Mr. Attlee's speech.
1497c478bd9Sstevel@tonic-gate
1507c478bd9Sstevel@tonic-gate# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout.  From
1517c478bd9Sstevel@tonic-gate# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times:
1527c478bd9Sstevel@tonic-gate#
1537c478bd9Sstevel@tonic-gate# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender.
1547c478bd9Sstevel@tonic-gate# Any announcement from Asia would reach St. John's New York newsroom on a
1557c478bd9Sstevel@tonic-gate# wire service teletype machine, which had prescribed signals for major news.
1567c478bd9Sstevel@tonic-gate# Associated Press, for example, would ring five bells before spewing out
1577c478bd9Sstevel@tonic-gate# typed copy of an important story, and 10 bells for news "of transcendental
1587c478bd9Sstevel@tonic-gate# importance."
1597c478bd9Sstevel@tonic-gate#
1607c478bd9Sstevel@tonic-gate# On Aug. 14, stalling while talking steadily into the NBC networks' open
1617c478bd9Sstevel@tonic-gate# microphone, St. John heard five bells and waited only to hear a sixth bell,
1627c478bd9Sstevel@tonic-gate# before announcing confidently: "Ladies and gentlemen, World War II is over.
1637c478bd9Sstevel@tonic-gate# The Japanese have agreed to our surrender terms."
1647c478bd9Sstevel@tonic-gate#
1657c478bd9Sstevel@tonic-gate# He had scored a 20-second scoop on other broadcasters.
1667c478bd9Sstevel@tonic-gate
16780868c53Srobbin# From Arthur David Olson (2005-08-22):
16880868c53Srobbin# Paul has been careful to use the "US" rules only in those locations
16980868c53Srobbin# that are part of the United States; this reflects the real scope of
17080868c53Srobbin# U.S. government action.  So even though the "US" rules have changed
17180868c53Srobbin# in the latest release, other countries won't be affected.
17280868c53Srobbin
173f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
1747c478bd9Sstevel@tonic-gateRule	US	1918	1919	-	Mar	lastSun	2:00	1:00	D
1757c478bd9Sstevel@tonic-gateRule	US	1918	1919	-	Oct	lastSun	2:00	0	S
1767c478bd9Sstevel@tonic-gateRule	US	1942	only	-	Feb	9	2:00	1:00	W # War
1777c478bd9Sstevel@tonic-gateRule	US	1945	only	-	Aug	14	23:00u	1:00	P # Peace
178374df668SAndy FiddamanRule	US	1945	only	-	Sep	30	2:00	0	S
17980868c53SrobbinRule	US	1967	2006	-	Oct	lastSun	2:00	0	S
1807c478bd9Sstevel@tonic-gateRule	US	1967	1973	-	Apr	lastSun	2:00	1:00	D
1817c478bd9Sstevel@tonic-gateRule	US	1974	only	-	Jan	6	2:00	1:00	D
182374df668SAndy FiddamanRule	US	1975	only	-	Feb	lastSun	2:00	1:00	D
1837c478bd9Sstevel@tonic-gateRule	US	1976	1986	-	Apr	lastSun	2:00	1:00	D
18480868c53SrobbinRule	US	1987	2006	-	Apr	Sun>=1	2:00	1:00	D
18580868c53SrobbinRule	US	2007	max	-	Mar	Sun>=8	2:00	1:00	D
18680868c53SrobbinRule	US	2007	max	-	Nov	Sun>=1	2:00	0	S
1877c478bd9Sstevel@tonic-gate
188f430f59aSrobbin# From Arthur David Olson, 2005-12-19
189f430f59aSrobbin# We generate the files specified below to guard against old files with
190f430f59aSrobbin# obsolete information being left in the time zone binary directory.
191f430f59aSrobbin# We limit the list to names that have appeared in previous versions of
192f430f59aSrobbin# this time zone package.
193f430f59aSrobbin# We do these as separate Zones rather than as Links to avoid problems if
194f430f59aSrobbin# a particular place changes whether it observes DST.
195f430f59aSrobbin# We put these specifications here in the northamerica file both to
196f430f59aSrobbin# increase the chances that they'll actually get compiled and to
197f430f59aSrobbin# avoid the need to duplicate the US rules in another file.
198f430f59aSrobbin
199374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
200f430f59aSrobbinZone	EST		 -5:00	-	EST
201f430f59aSrobbinZone	MST		 -7:00	-	MST
202f430f59aSrobbinZone	HST		-10:00	-	HST
203f430f59aSrobbinZone	EST5EDT		 -5:00	US	E%sT
204f430f59aSrobbinZone	CST6CDT		 -6:00	US	C%sT
205f430f59aSrobbinZone	MST7MDT		 -7:00	US	M%sT
206f430f59aSrobbinZone	PST8PDT		 -8:00	US	P%sT
207f430f59aSrobbin
2087c478bd9Sstevel@tonic-gate# From U. S. Naval Observatory (1989-01-19):
2097c478bd9Sstevel@tonic-gate# USA  EASTERN       5 H  BEHIND UTC    NEW YORK, WASHINGTON
2107c478bd9Sstevel@tonic-gate# USA  EASTERN       4 H  BEHIND UTC    APR 3 - OCT 30
2117c478bd9Sstevel@tonic-gate# USA  CENTRAL       6 H  BEHIND UTC    CHICAGO, HOUSTON
2127c478bd9Sstevel@tonic-gate# USA  CENTRAL       5 H  BEHIND UTC    APR 3 - OCT 30
2137c478bd9Sstevel@tonic-gate# USA  MOUNTAIN      7 H  BEHIND UTC    DENVER
2147c478bd9Sstevel@tonic-gate# USA  MOUNTAIN      6 H  BEHIND UTC    APR 3 - OCT 30
2157c478bd9Sstevel@tonic-gate# USA  PACIFIC       8 H  BEHIND UTC    L.A., SAN FRANCISCO
2167c478bd9Sstevel@tonic-gate# USA  PACIFIC       7 H  BEHIND UTC    APR 3 - OCT 30
2177c478bd9Sstevel@tonic-gate# USA  ALASKA STD    9 H  BEHIND UTC    MOST OF ALASKA     (AKST)
2187c478bd9Sstevel@tonic-gate# USA  ALASKA STD    8 H  BEHIND UTC    APR 3 - OCT 30 (AKDT)
2197c478bd9Sstevel@tonic-gate# USA  ALEUTIAN     10 H  BEHIND UTC    ISLANDS WEST OF 170W
2206f8e8937SDan McDonald# USA    "           9 H  BEHIND UTC    APR 3 - OCT 30
2217c478bd9Sstevel@tonic-gate# USA  HAWAII       10 H  BEHIND UTC
2227c478bd9Sstevel@tonic-gate# USA  BERING       11 H  BEHIND UTC    SAMOA, MIDWAY
2237c478bd9Sstevel@tonic-gate
2247c478bd9Sstevel@tonic-gate# From Arthur David Olson (1989-01-21):
2257c478bd9Sstevel@tonic-gate# The above dates are for 1988.
2267c478bd9Sstevel@tonic-gate# Note the "AKST" and "AKDT" abbreviations, the claim that there's
2277c478bd9Sstevel@tonic-gate# no DST in Samoa, and the claim that there is DST in Alaska and the
2287c478bd9Sstevel@tonic-gate# Aleutians.
2297c478bd9Sstevel@tonic-gate
2307c478bd9Sstevel@tonic-gate# From Arthur David Olson (1988-02-13):
2317c478bd9Sstevel@tonic-gate# Legal standard time zone names, from United States Code (1982 Edition and
2327c478bd9Sstevel@tonic-gate# Supplement III), Title 15, Chapter 6, Section 260 and forward.  First, names
2337c478bd9Sstevel@tonic-gate# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966
2347c478bd9Sstevel@tonic-gate# took effect), as explained in sections 263 and 261:
2357c478bd9Sstevel@tonic-gate#	(none)
2367c478bd9Sstevel@tonic-gate#	United States standard eastern time
2377c478bd9Sstevel@tonic-gate#	United States standard mountain time
2387c478bd9Sstevel@tonic-gate#	United States standard central time
2397c478bd9Sstevel@tonic-gate#	United States standard Pacific time
2407c478bd9Sstevel@tonic-gate#	(none)
2417c478bd9Sstevel@tonic-gate#	United States standard Alaska time
2427c478bd9Sstevel@tonic-gate#	(none)
2437c478bd9Sstevel@tonic-gate# Next, names from 1967-04-01 until 1983-11-30 (the date for
2447c478bd9Sstevel@tonic-gate# public law 98-181):
2457c478bd9Sstevel@tonic-gate#	Atlantic standard time
2467c478bd9Sstevel@tonic-gate#	eastern standard time
2477c478bd9Sstevel@tonic-gate#	central standard time
2487c478bd9Sstevel@tonic-gate#	mountain standard time
2497c478bd9Sstevel@tonic-gate#	Pacific standard time
2507c478bd9Sstevel@tonic-gate#	Yukon standard time
2517c478bd9Sstevel@tonic-gate#	Alaska-Hawaii standard time
2527c478bd9Sstevel@tonic-gate#	Bering standard time
2537c478bd9Sstevel@tonic-gate# And after 1983-11-30:
2547c478bd9Sstevel@tonic-gate#	Atlantic standard time
2557c478bd9Sstevel@tonic-gate#	eastern standard time
2567c478bd9Sstevel@tonic-gate#	central standard time
2577c478bd9Sstevel@tonic-gate#	mountain standard time
2587c478bd9Sstevel@tonic-gate#	Pacific standard time
2597c478bd9Sstevel@tonic-gate#	Alaska standard time
2607c478bd9Sstevel@tonic-gate#	Hawaii-Aleutian standard time
2617c478bd9Sstevel@tonic-gate#	Samoa standard time
2627c478bd9Sstevel@tonic-gate# The law doesn't give abbreviations.
2637c478bd9Sstevel@tonic-gate#
264dafc4501SDan McDonald# From Paul Eggert (2016-12-19):
265dafc4501SDan McDonald# Here are URLs for the 1918 and 1966 legislation:
266dafc4501SDan McDonald# http://uscode.house.gov/statviewer.htm?volume=40&page=451
267dafc4501SDan McDonald# http://uscode.house.gov/statviewer.htm?volume=80&page=108
268dafc4501SDan McDonald# Although the 1918 names were officially "United States Standard
269dafc4501SDan McDonald# Eastern Time" and similarly for "Central", "Mountain", "Pacific",
270dafc4501SDan McDonald# and "Alaska", in practice "Standard" was placed just before "Time",
271dafc4501SDan McDonald# as codified in 1966.  In practice, Alaska time was abbreviated "AST"
272dafc4501SDan McDonald# before 1968.  Summarizing the 1967 name changes:
273dafc4501SDan McDonald#	1918 names			1967 names
274dafc4501SDan McDonald#  -08	Standard Pacific Time (PST)	Pacific standard time (PST)
275dafc4501SDan McDonald#  -09	(unofficial) Yukon (YST)	Yukon standard time (YST)
276dafc4501SDan McDonald#  -10	Standard Alaska Time (AST)	Alaska-Hawaii standard time (AHST)
277dafc4501SDan McDonald#  -11	(unofficial) Nome (NST)		Bering standard time (BST)
278dafc4501SDan McDonald#
279af2e290bSAndy Fiddaman# From Paul Eggert (2023-01-23), from a 2001-01-08 heads-up from Rives McDow:
280af2e290bSAndy Fiddaman# Public law 106-564 (2000-12-23) introduced "Chamorro standard time"
28156b82ca8SDan McDonald# for time in Guam and the Northern Marianas.  See the file "australasia".
282af2e290bSAndy Fiddaman# Also see 15 U.S.C. §263 <https://www.law.cornell.edu/uscode/text/15/263>.
28356b82ca8SDan McDonald#
28456b82ca8SDan McDonald# From Paul Eggert (2015-04-17):
28556b82ca8SDan McDonald# HST and HDT are standardized abbreviations for Hawaii-Aleutian
28656b82ca8SDan McDonald# standard and daylight times.  See section 9.47 (p 234) of the
28756b82ca8SDan McDonald# U.S. Government Printing Office Style Manual (2008)
288b654b02dSYuri Pankov# https://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf
2892f9aa4a7Srobbin
29080868c53Srobbin# From Arthur David Olson, 2005-08-09
29180868c53Srobbin# The following was signed into law on 2005-08-08.
29280868c53Srobbin#
29380868c53Srobbin# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS.
2946f8e8937SDan McDonald#   (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15
29580868c53Srobbin#   U.S.C. 260a(a)) is amended--
2966f8e8937SDan McDonald#     (1) by striking "first Sunday of April" and inserting "second
2976f8e8937SDan McDonald#     Sunday of March"; and
2986f8e8937SDan McDonald#     (2) by striking "last Sunday of October" and inserting "first
29980868c53Srobbin#     Sunday of November'.
3006f8e8937SDan McDonald#   (b) Effective Date.--Subsection (a) shall take effect 1 year after the
30180868c53Srobbin#   date of enactment of this Act or March 1, 2007, whichever is later.
3026f8e8937SDan McDonald#   (c) Report to Congress.--Not later than 9 months after the effective
30380868c53Srobbin#   date stated in subsection (b), the Secretary shall report to Congress
30480868c53Srobbin#   on the impact of this section on energy consumption in the United
30580868c53Srobbin#   States.
3066f8e8937SDan McDonald#   (d) Right to Revert.--Congress retains the right to revert the
30780868c53Srobbin#   Daylight Saving Time back to the 2005 time schedules once the
30880868c53Srobbin#   Department study is complete.
3097c478bd9Sstevel@tonic-gate
3107c478bd9Sstevel@tonic-gate# US eastern time, represented by New York
3117c478bd9Sstevel@tonic-gate
3127c478bd9Sstevel@tonic-gate# Connecticut, Delaware, District of Columbia, most of Florida,
31380868c53Srobbin# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky
31480868c53Srobbin# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts,
3157c478bd9Sstevel@tonic-gate# New Hampshire, New Jersey, New York, North Carolina, Ohio,
3167c478bd9Sstevel@tonic-gate# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee,
3177c478bd9Sstevel@tonic-gate# Vermont, Virginia, West Virginia
3187c478bd9Sstevel@tonic-gate
31980868c53Srobbin# From Dave Cantor (2004-11-02):
32080868c53Srobbin# Early this summer I had the occasion to visit the Mount Washington
32180868c53Srobbin# Observatory weather station atop (of course!) Mount Washington [, NH]....
32280868c53Srobbin# One of the staff members said that the station was on Eastern Standard Time
32380868c53Srobbin# and didn't change their clocks for Daylight Saving ... so that their
32480868c53Srobbin# reports will always have times which are 5 hours behind UTC.
32580868c53Srobbin
32680868c53Srobbin# From Paul Eggert (2005-08-26):
32780868c53Srobbin# According to today's Huntsville Times
3286f8e8937SDan McDonald# http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1
32980868c53Srobbin# a few towns on Alabama's "eastern border with Georgia, such as Phenix City
33080868c53Srobbin# in Russell County, Lanett in Chambers County and some towns in Lee County,
33180868c53Srobbin# set their watches and clocks on Eastern time."  It quotes H.H. "Bubba"
33280868c53Srobbin# Roberts, city administrator in Phenix City. as saying "We are in the Central
33380868c53Srobbin# time zone, but we do go by the Eastern time zone because so many people work
3342f9aa4a7Srobbin# in Columbus."
335dafc4501SDan McDonald#
336dafc4501SDan McDonald# From Paul Eggert (2017-02-22):
337dafc4501SDan McDonald# Four cities are involved.  The two not mentioned above are Smiths Station
338dafc4501SDan McDonald# and Valley.  Barbara Brooks, Valley's assistant treasurer, heard it started
339dafc4501SDan McDonald# because West Point Pepperell textile mills were in Alabama while the
340dafc4501SDan McDonald# corporate office was in Georgia, and residents voted to keep Eastern
341dafc4501SDan McDonald# time even after the mills closed.  See: Kazek K. Did you know which
342dafc4501SDan McDonald# Alabama towns are in a different time zone?  al.com 2017-02-06.
343dafc4501SDan McDonald# http://www.al.com/living/index.ssf/2017/02/do_you_know_which_alabama_town.html
34480868c53Srobbin
34500973057SDan McDonald# From Paul Eggert (2014-09-06):
34600973057SDan McDonald# Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208
34700973057SDan McDonald# says that New York City Hall time was 3 minutes 58.4 seconds fast of
348427b4c5cSAndy Fiddaman# Eastern time (i.e., -4:56:01.6) just before the 1883 switch.
34900973057SDan McDonald
350f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER
3517c478bd9Sstevel@tonic-gateRule	NYC	1920	only	-	Mar	lastSun	2:00	1:00	D
3527c478bd9Sstevel@tonic-gateRule	NYC	1920	only	-	Oct	lastSun	2:00	0	S
3537c478bd9Sstevel@tonic-gateRule	NYC	1921	1966	-	Apr	lastSun	2:00	1:00	D
3547c478bd9Sstevel@tonic-gateRule	NYC	1921	1954	-	Sep	lastSun	2:00	0	S
3557c478bd9Sstevel@tonic-gateRule	NYC	1955	1966	-	Oct	lastSun	2:00	0	S
356374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
357427b4c5cSAndy Fiddaman		#STDOFF	-4:56:01.6
358427b4c5cSAndy FiddamanZone America/New_York	-4:56:02 -	LMT	1883 Nov 18 17:00u
3597c478bd9Sstevel@tonic-gate			-5:00	US	E%sT	1920
3607c478bd9Sstevel@tonic-gate			-5:00	NYC	E%sT	1942
3617c478bd9Sstevel@tonic-gate			-5:00	US	E%sT	1946
3627c478bd9Sstevel@tonic-gate			-5:00	NYC	E%sT	1967
3637c478bd9Sstevel@tonic-gate			-5:00	US	E%sT
3647c478bd9Sstevel@tonic-gate
3657c478bd9Sstevel@tonic-gate# US central time, represented by Chicago
3667c478bd9Sstevel@tonic-gate
3677c478bd9Sstevel@tonic-gate# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia,
3687c478bd9Sstevel@tonic-gate# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and
3697c478bd9Sstevel@tonic-gate# Washington counties), Illinois, western Indiana
3707c478bd9Sstevel@tonic-gate# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
3717c478bd9Sstevel@tonic-gate# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western
3727c478bd9Sstevel@tonic-gate# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern
3737c478bd9Sstevel@tonic-gate# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota,
3747c478bd9Sstevel@tonic-gate# western Tennessee, most of Texas, Wisconsin
3757c478bd9Sstevel@tonic-gate
3764b8ee424SYuri Pankov# From Paul Eggert (2018-01-07):
3774b8ee424SYuri Pankov# In 1869 the Chicago Astronomical Society contracted with the city to keep
3784b8ee424SYuri Pankov# time.  Though delayed by the Great Fire, by 1880 a wire ran from the
3794b8ee424SYuri Pankov# Dearborn Observatory (on the University of Chicago campus) to City Hall,
3804b8ee424SYuri Pankov# which then sent signals to police and fire stations.  However, railroads got
3814b8ee424SYuri Pankov# their time signals from the Allegheny Observatory, the Madison Observatory,
3824b8ee424SYuri Pankov# the Ann Arbor Observatory, etc., so their clocks did not agree with each
3834b8ee424SYuri Pankov# other or with the city's official time.  The confusion took some years to
3844b8ee424SYuri Pankov# clear up.  See:
3854b8ee424SYuri Pankov# Moser M. How Chicago gave America its time zones. Chicago. 2018-01-04.
3864b8ee424SYuri Pankov# http://www.chicagomag.com/city-life/January-2018/How-Chicago-Gave-America-Its-Time-Zones/
3874b8ee424SYuri Pankov
3882f9aa4a7Srobbin# From Larry M. Smith (2006-04-26) re Wisconsin:
389b654b02dSYuri Pankov# https://docs.legis.wisconsin.gov/statutes/statutes/175.pdf
3902f9aa4a7Srobbin# is currently enforced at the 01:00 time of change.  Because the local
3912f9aa4a7Srobbin# "bar time" in the state corresponds to 02:00, a number of citations
3922f9aa4a7Srobbin# are issued for the "sale of class 'B' alcohol after prohibited
3932f9aa4a7Srobbin# hours" within the deviated hour of this change every year....
394a68d064cSrobbin#
395a68d064cSrobbin# From Douglas R. Bomberg (2007-03-12):
396a68d064cSrobbin# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI
397a68d064cSrobbin# Statue 175 closer in synch with the US Congress' intent....
398b654b02dSYuri Pankov# https://docs.legis.wisconsin.gov/2007/related/acts/3
3992f9aa4a7Srobbin
400f63cc156SDan McDonald# From an email administrator of the City of Fort Pierre, SD (2015-12-21):
401f63cc156SDan McDonald# Fort Pierre is technically located in the Mountain time zone as is
402f63cc156SDan McDonald# the rest of Stanley County.  Most of Stanley County and Fort Pierre
403f63cc156SDan McDonald# uses the Central time zone due to doing most of their business in
404f63cc156SDan McDonald# Pierre so it simplifies schedules.  I have lived in Stanley County
405f63cc156SDan McDonald# all my life and it has been that way since I can remember.  (43 years!)
406f63cc156SDan McDonald#
407f63cc156SDan McDonald# From Paul Eggert (2015-12-25):
408f63cc156SDan McDonald# Assume this practice predates 1970, so Fort Pierre can use America/Chicago.
409f63cc156SDan McDonald
410374df668SAndy Fiddaman# From Paul Eggert (2015-04-06):
411374df668SAndy Fiddaman# In 1950s Nashville a public clock had dueling faces, one for conservatives
412374df668SAndy Fiddaman# and the other for liberals; the two sides didn't agree about the time of day.
413374df668SAndy Fiddaman# I haven't found a photo of this clock, nor have I tracked down the TIME
414374df668SAndy Fiddaman# magazine report cited below, but here's the story as told by the late
415374df668SAndy Fiddaman# American journalist John Seigenthaler, who was there:
416374df668SAndy Fiddaman#
417374df668SAndy Fiddaman# "The two [newspaper] owners held strongly contrasting political and
418374df668SAndy Fiddaman# ideological views.  Evans was a New South liberal, Stahlman an Old South
419374df668SAndy Fiddaman# conservative, and their two papers frequently clashed editorially, often on
420374df668SAndy Fiddaman# the same day....  In the 1950s as the state legislature was grappling with
421374df668SAndy Fiddaman# the question of whether to approve daylight saving time for the entire state,
422374df668SAndy Fiddaman# TIME magazine reported:
423374df668SAndy Fiddaman#
424374df668SAndy Fiddaman# "'The Nashville Banner and The Nashville Tennessean rarely agree on anything
425374df668SAndy Fiddaman# but the time of day - and last week they couldn't agree on that.'
426374df668SAndy Fiddaman#
427374df668SAndy Fiddaman# "It was all too true. The clock on the front of the building had two faces -
428374df668SAndy Fiddaman# The Tennessean side of the building facing west, the other, east.  When it
429374df668SAndy Fiddaman# was high noon Banner time, it was 11 a.m. Tennessean time."
430374df668SAndy Fiddaman#
431374df668SAndy Fiddaman# Seigenthaler J. For 100 years, Tennessean had it covered.
432374df668SAndy Fiddaman# The Tennessean 2007-05-11, republished 2015-04-06.
433374df668SAndy Fiddaman# https://www.tennessean.com/story/insider/extras/2015/04/06/archives-seigenthaler-for-100-years-the-tennessean-had-it-covered/25348545/
434374df668SAndy Fiddaman
435f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER
4367c478bd9Sstevel@tonic-gateRule	Chicago	1920	only	-	Jun	13	2:00	1:00	D
4377c478bd9Sstevel@tonic-gateRule	Chicago	1920	1921	-	Oct	lastSun	2:00	0	S
4387c478bd9Sstevel@tonic-gateRule	Chicago	1921	only	-	Mar	lastSun	2:00	1:00	D
4397c478bd9Sstevel@tonic-gateRule	Chicago	1922	1966	-	Apr	lastSun	2:00	1:00	D
4407c478bd9Sstevel@tonic-gateRule	Chicago	1922	1954	-	Sep	lastSun	2:00	0	S
4417c478bd9Sstevel@tonic-gateRule	Chicago	1955	1966	-	Oct	lastSun	2:00	0	S
442374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
443f117aa50SRobert MustacchiZone America/Chicago	-5:50:36 -	LMT	1883 Nov 18 18:00u
4447c478bd9Sstevel@tonic-gate			-6:00	US	C%sT	1920
4456f8e8937SDan McDonald			-6:00	Chicago	C%sT	1936 Mar  1  2:00
4466f8e8937SDan McDonald			-5:00	-	EST	1936 Nov 15  2:00
4477c478bd9Sstevel@tonic-gate			-6:00	Chicago	C%sT	1942
4487c478bd9Sstevel@tonic-gate			-6:00	US	C%sT	1946
4497c478bd9Sstevel@tonic-gate			-6:00	Chicago	C%sT	1967
4507c478bd9Sstevel@tonic-gate			-6:00	US	C%sT
4517c478bd9Sstevel@tonic-gate# Oliver County, ND switched from mountain to central time on 1992-10-25.
452f117aa50SRobert MustacchiZone America/North_Dakota/Center -6:45:12 - LMT	1883 Nov 18 19:00u
4536f8e8937SDan McDonald			-7:00	US	M%sT	1992 Oct 25  2:00
4547c478bd9Sstevel@tonic-gate			-6:00	US	C%sT
4552f9aa4a7Srobbin# Morton County, ND, switched from mountain to central time on
4562f9aa4a7Srobbin# 2003-10-26, except for the area around Mandan which was already central time.
4572f9aa4a7Srobbin# See <http://dmses.dot.gov/docimages/p63/135818.pdf>.
4582f9aa4a7Srobbin# Officially this switch also included part of Sioux County, and
4592f9aa4a7Srobbin# Jones, Mellette, and Todd Counties in South Dakota;
4602f9aa4a7Srobbin# but in practice these other counties were already observing central time.
4612f9aa4a7Srobbin# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>.
462f117aa50SRobert MustacchiZone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 19:00u
4636f8e8937SDan McDonald			-7:00	US	M%sT	2003 Oct 26  2:00
4642f9aa4a7Srobbin			-6:00	US	C%sT
4657c478bd9Sstevel@tonic-gate
466abaa65c8SYuri Pankov# From Josh Findley (2011-01-21):
467abaa65c8SYuri Pankov# ...it appears that Mercer County, North Dakota, changed from the
468abaa65c8SYuri Pankov# mountain time zone to the central time zone at the last transition from
469abaa65c8SYuri Pankov# daylight-saving to standard time (on Nov. 7, 2010):
470b654b02dSYuri Pankov# https://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm
471abaa65c8SYuri Pankov# http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html
472abaa65c8SYuri Pankov
473abaa65c8SYuri Pankov# From Andy Lipscomb (2011-01-24):
474abaa65c8SYuri Pankov# ...according to the Census Bureau, the largest city is Beulah (although
475abaa65c8SYuri Pankov# it's commonly referred to as Beulah-Hazen, with Hazen being the next
476abaa65c8SYuri Pankov# largest city in Mercer County).  Google Maps places Beulah's city hall
4773508b934SYuri Pankov# at 47° 15' 51" N, 101° 46' 40" W, which yields an offset of 6h47'07".
478abaa65c8SYuri Pankov
479f117aa50SRobert MustacchiZone America/North_Dakota/Beulah -6:47:07 - LMT	1883 Nov 18 19:00u
4806f8e8937SDan McDonald			-7:00	US	M%sT	2010 Nov  7  2:00
481abaa65c8SYuri Pankov			-6:00	US	C%sT
482abaa65c8SYuri Pankov
4837c478bd9Sstevel@tonic-gate# US mountain time, represented by Denver
4847c478bd9Sstevel@tonic-gate#
4857c478bd9Sstevel@tonic-gate# Colorado, far western Kansas, Montana, western
4867c478bd9Sstevel@tonic-gate# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City),
487b70cafdfSrobbin# New Mexico, southwestern North Dakota,
4887c478bd9Sstevel@tonic-gate# western South Dakota, far western Texas (El Paso County, Hudspeth County,
4897c478bd9Sstevel@tonic-gate# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming
4907c478bd9Sstevel@tonic-gate#
49105e627dcSAndy Fiddaman# From Paul Eggert (2018-10-25):
49205e627dcSAndy Fiddaman# On 1921-03-04 federal law placed all of Texas into the central time zone.
49305e627dcSAndy Fiddaman# However, El Paso ignored the law for decades and continued to observe
49405e627dcSAndy Fiddaman# mountain time, on the grounds that that's what they had always done
49505e627dcSAndy Fiddaman# and they weren't about to let the federal government tell them what to do.
49605e627dcSAndy Fiddaman# Eventually the federal government gave in and changed the law on
49705e627dcSAndy Fiddaman# 1970-04-10 to match what El Paso was actually doing.  Although
49805e627dcSAndy Fiddaman# that's slightly after our 1970 cutoff, there is no need to create a
49905e627dcSAndy Fiddaman# separate zone for El Paso since they were ignoring the law anyway.  See:
50005e627dcSAndy Fiddaman# Long T. El Pasoans were time rebels, fought to stay in Mountain zone.
50105e627dcSAndy Fiddaman# El Paso Times. 2018-10-24 06:40 -06.
50205e627dcSAndy Fiddaman# https://www.elpasotimes.com/story/news/local/el-paso/2018/10/24/el-pasoans-were-time-rebels-fought-stay-mountain-zone/1744509002/
50305e627dcSAndy Fiddaman#
504f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER
5057c478bd9Sstevel@tonic-gateRule	Denver	1920	1921	-	Mar	lastSun	2:00	1:00	D
5067c478bd9Sstevel@tonic-gateRule	Denver	1920	only	-	Oct	lastSun	2:00	0	S
5077c478bd9Sstevel@tonic-gateRule	Denver	1921	only	-	May	22	2:00	0	S
5087c478bd9Sstevel@tonic-gateRule	Denver	1965	1966	-	Apr	lastSun	2:00	1:00	D
5097c478bd9Sstevel@tonic-gateRule	Denver	1965	1966	-	Oct	lastSun	2:00	0	S
510374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
511f117aa50SRobert MustacchiZone America/Denver	-6:59:56 -	LMT	1883 Nov 18 19:00u
5127c478bd9Sstevel@tonic-gate			-7:00	US	M%sT	1920
5137c478bd9Sstevel@tonic-gate			-7:00	Denver	M%sT	1942
5147c478bd9Sstevel@tonic-gate			-7:00	US	M%sT	1946
5157c478bd9Sstevel@tonic-gate			-7:00	Denver	M%sT	1967
5167c478bd9Sstevel@tonic-gate			-7:00	US	M%sT
5177c478bd9Sstevel@tonic-gate
5187c478bd9Sstevel@tonic-gate# US Pacific time, represented by Los Angeles
5197c478bd9Sstevel@tonic-gate#
5207c478bd9Sstevel@tonic-gate# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater,
5216f8e8937SDan McDonald# Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county
5226f8e8937SDan McDonald# north of the Salmon River, and the towns of Burgdorf and Warren),
5233508b934SYuri Pankov# Nevada (except West Wendover), Oregon (except the northern ¾ of
5246f8e8937SDan McDonald# Malheur county), and Washington
525c2d5ab87SDan McDonald
526c2d5ab87SDan McDonald# From Paul Eggert (2016-08-20):
527c2d5ab87SDan McDonald# In early February 1948, in response to California's electricity shortage,
528c2d5ab87SDan McDonald# PG&E changed power frequency from 60 to 59.5 Hz during daylight hours,
529c2d5ab87SDan McDonald# causing electric clocks to lose six minutes per day.  (This did not change
530c2d5ab87SDan McDonald# legal time, and is not part of the data here.)  See:
531c2d5ab87SDan McDonald# Ross SA. An energy crisis from the past: Northern California in 1948.
532c2d5ab87SDan McDonald# Working Paper No. 8, Institute of Governmental Studies, UC Berkeley,
533b654b02dSYuri Pankov# 1973-11.  https://escholarship.org/uc/item/8x22k30c
534c2d5ab87SDan McDonald#
535c2d5ab87SDan McDonald# In another measure to save electricity, DST was instituted from 1948-03-14
536c2d5ab87SDan McDonald# at 02:01 to 1949-01-16 at 02:00, with the governor having the option to move
537c2d5ab87SDan McDonald# the fallback transition earlier.  See pages 3-4 of:
538c2d5ab87SDan McDonald# http://clerk.assembly.ca.gov/sites/clerk.assembly.ca.gov/files/archive/Statutes/1948/48Vol1_Chapters.pdf
539c2d5ab87SDan McDonald#
540c2d5ab87SDan McDonald# In response:
541c2d5ab87SDan McDonald#
542c2d5ab87SDan McDonald#   Governor Warren received a torrent of objecting mail, and it is not too much
543c2d5ab87SDan McDonald#   to speculate that the objections to Daylight Saving Time were one important
544c2d5ab87SDan McDonald#   factor in the defeat of the Dewey-Warren Presidential ticket in California.
545c2d5ab87SDan McDonald#     -- Ross, p 25
546c2d5ab87SDan McDonald#
547c2d5ab87SDan McDonald# On December 8 the governor exercised the option, setting the date to January 1
548c2d5ab87SDan McDonald# (LA Times 1948-12-09).  The transition time was 02:00 (LA Times 1949-01-01).
549c2d5ab87SDan McDonald#
550c2d5ab87SDan McDonald# Despite the controversy, in 1949 California voters approved Proposition 12,
551c2d5ab87SDan McDonald# which established DST from April's last Sunday at 01:00 until September's
552c2d5ab87SDan McDonald# last Sunday at 02:00. This was amended by 1962's Proposition 6, which changed
553c2d5ab87SDan McDonald# the fall-back date to October's last Sunday. See:
554b654b02dSYuri Pankov# https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1501&context=ca_ballot_props
555b654b02dSYuri Pankov# https://repository.uchastings.edu/cgi/viewcontent.cgi?article=1636&context=ca_ballot_props
5567c478bd9Sstevel@tonic-gate#
557f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER
558c2d5ab87SDan McDonaldRule	CA	1948	only	-	Mar	14	2:01	1:00	D
5597c478bd9Sstevel@tonic-gateRule	CA	1949	only	-	Jan	 1	2:00	0	S
560c2d5ab87SDan McDonaldRule	CA	1950	1966	-	Apr	lastSun	1:00	1:00	D
5617c478bd9Sstevel@tonic-gateRule	CA	1950	1961	-	Sep	lastSun	2:00	0	S
5627c478bd9Sstevel@tonic-gateRule	CA	1962	1966	-	Oct	lastSun	2:00	0	S
563374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
564f117aa50SRobert MustacchiZone America/Los_Angeles -7:52:58 -	LMT	1883 Nov 18 20:00u
5657c478bd9Sstevel@tonic-gate			-8:00	US	P%sT	1946
5667c478bd9Sstevel@tonic-gate			-8:00	CA	P%sT	1967
5677c478bd9Sstevel@tonic-gate			-8:00	US	P%sT
5687c478bd9Sstevel@tonic-gate
5697c478bd9Sstevel@tonic-gate# Alaska
570dafc4501SDan McDonald# AK%sT is the modern abbreviation for -09 per USNO.
5717c478bd9Sstevel@tonic-gate#
572b654b02dSYuri Pankov# From Paul Eggert (2017-06-15):
5737c478bd9Sstevel@tonic-gate# Howse writes that Alaska switched from the Julian to the Gregorian calendar,
5747c478bd9Sstevel@tonic-gate# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
575b654b02dSYuri Pankov# On Friday, 1867-10-18 (Gregorian), at precisely 15:30 local time, the
576b654b02dSYuri Pankov# Russian forts and fleet at Sitka fired salutes to mark the ceremony of
577b654b02dSYuri Pankov# formal transfer.  See the Sacramento Daily Union (1867-11-14), p 3, col 2.
578b654b02dSYuri Pankov# https://cdnc.ucr.edu/cgi-bin/cdnc?a=d&d=SDU18671114.2.12.1
579b654b02dSYuri Pankov# Sitka workers did not change their calendars until Sunday, 1867-10-20,
580b654b02dSYuri Pankov# and so celebrated two Sundays that week.  See: Ahllund T (tr Hallamaa P).
581b654b02dSYuri Pankov# From the memoirs of a Finnish workman. Alaska History. 2006 Fall;21(2):1-25.
582b654b02dSYuri Pankov# http://alaskahistoricalsociety.org/wp-content/uploads/2016/12/Ahllund-2006-Memoirs-of-a-Finnish-Workman.pdf
583b654b02dSYuri Pankov# Include only the time zone part of this transition, ignoring the switch
584b654b02dSYuri Pankov# from Julian to Gregorian, since we can't represent the Julian calendar.
585b654b02dSYuri Pankov#
586b654b02dSYuri Pankov# As far as we know, of the locations mentioned below only Sitka was
5877c478bd9Sstevel@tonic-gate# permanently inhabited in 1867 by anyone using either calendar.
588b654b02dSYuri Pankov# (Yakutat was colonized by the Russians in 1799, but the settlement was
589b654b02dSYuri Pankov# destroyed in 1805 by a Yakutat-kon war party.)  Many of Alaska's inhabitants
590b654b02dSYuri Pankov# were unaware of the US acquisition of Alaska, much less of any calendar or
591b654b02dSYuri Pankov# time change.  However, the Russian-influenced part of Alaska did observe
592b654b02dSYuri Pankov# Russian time, and it is more accurate to model this than to ignore it.
593b654b02dSYuri Pankov# The database format requires an exact transition time; use the Russian
594b654b02dSYuri Pankov# salute as a somewhat-arbitrary time for the formal transfer of control for
595b654b02dSYuri Pankov# all of Alaska.  Sitka's UTC offset is -9:01:13; adjust its 15:30 to the
596b654b02dSYuri Pankov# local times of other Alaskan locations so that they change simultaneously.
597abaa65c8SYuri Pankov
5986f8e8937SDan McDonald# From Paul Eggert (2014-07-18):
599af2e290bSAndy Fiddaman# One opinion of the early 1980s turmoil in Alaska over time zones and
6006f8e8937SDan McDonald# daylight saving time appeared as graffiti on a Juneau airport wall:
6016f8e8937SDan McDonald# "Welcome to Juneau.  Please turn your watch back to the 19th century."
6026f8e8937SDan McDonald# See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01.
6036f8e8937SDan McDonald# http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html
604abaa65c8SYuri Pankov#
6056f8e8937SDan McDonald# Steve Ferguson (2011-01-31) referred to the following source:
6066f8e8937SDan McDonald# Norris F. Keeping time in Alaska: national directives, local response.
6076f8e8937SDan McDonald# Alaska History 2001;16(1-2).
6086f8e8937SDan McDonald# http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/
609abaa65c8SYuri Pankov
610abaa65c8SYuri Pankov# From Arthur David Olson (2011-02-01):
611abaa65c8SYuri Pankov# Here's database-relevant material from the 2001 "Alaska History" article:
612abaa65c8SYuri Pankov#
613abaa65c8SYuri Pankov# On September 20 [1979]...DOT...officials decreed that on April 27,
614abaa65c8SYuri Pankov# 1980, Juneau and other nearby communities would move to Yukon Time.
615abaa65c8SYuri Pankov# Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on
616abaa65c8SYuri Pankov# Pacific Time.
617abaa65c8SYuri Pankov#
618abaa65c8SYuri Pankov# ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the
619abaa65c8SYuri Pankov# Department's September 1979 decision. Juneau and other communities in
620abaa65c8SYuri Pankov# northern Southeast reverted to Pacific Time on October 26.
621abaa65c8SYuri Pankov#
622abaa65c8SYuri Pankov# On October 28 [1983]...the Metlakatla Indian Community Council voted
623abaa65c8SYuri Pankov# unanimously to keep the reservation on Pacific Time.
624abaa65c8SYuri Pankov#
625abaa65c8SYuri Pankov# According to DOT official Joanne Petrie, Indian reservations are not
626abaa65c8SYuri Pankov# bound to follow time zones imposed by neighboring jurisdictions.
627abaa65c8SYuri Pankov#
628abaa65c8SYuri Pankov# (The last is consistent with how the database now handles the Navajo
629abaa65c8SYuri Pankov# Nation.)
630abaa65c8SYuri Pankov
631abaa65c8SYuri Pankov# From Arthur David Olson (2011-02-09):
632abaa65c8SYuri Pankov# I just spoke by phone with a staff member at the Metlakatla Indian
633abaa65c8SYuri Pankov# Community office (using contact information available at
634abaa65c8SYuri Pankov# http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla
635abaa65c8SYuri Pankov# It's shortly after 1:00 here on the east coast of the United States;
636abaa65c8SYuri Pankov# the staffer said it was shortly after 10:00 there. When I asked whether
6376f8e8937SDan McDonald# that meant they were on Pacific time, they said no - they were on their
638abaa65c8SYuri Pankov# own time. I asked about daylight saving; they said it wasn't used. I
639abaa65c8SYuri Pankov# did not inquire about practices in the past.
640abaa65c8SYuri Pankov
641abaa65c8SYuri Pankov# From Arthur David Olson (2011-08-17):
642abaa65c8SYuri Pankov# For lack of better information, assume that Metlakatla's
643abaa65c8SYuri Pankov# abandonment of use of daylight saving resulted from the 1983 vote.
644abaa65c8SYuri Pankov
645f63cc156SDan McDonald# From Steffen Thorsen (2015-11-09):
646f63cc156SDan McDonald# It seems Metlakatla did go off PST on Sunday, November 1, changing
647f63cc156SDan McDonald# their time to AKST and are going to follow Alaska's DST, switching
648f63cc156SDan McDonald# between AKST and AKDT from now on....
649b654b02dSYuri Pankov# https://www.krbd.org/2015/10/30/annette-island-times-they-are-a-changing/
650f63cc156SDan McDonald
651251a62bcSDominik Hassler# From Ryan Stanley (2018-11-06):
652251a62bcSDominik Hassler# The Metlakatla community in Alaska has decided not to change its
653251a62bcSDominik Hassler# clock back an hour starting on November 4th, 2018 (day before yesterday).
654251a62bcSDominik Hassler# They will be gmtoff=-28800 year-round.
655251a62bcSDominik Hassler# https://www.facebook.com/141055983004923/photos/pb.141055983004923.-2207520000.1541465673./569081370202380/
656251a62bcSDominik Hassler
657251a62bcSDominik Hassler# From Paul Eggert (2018-12-16):
658251a62bcSDominik Hassler# In a 2018-12-11 special election, Metlakatla voted to go back to
659251a62bcSDominik Hassler# Alaska time (including daylight saving time) starting next year.
660251a62bcSDominik Hassler# https://www.krbd.org/2018/12/12/metlakatla-to-follow-alaska-standard-time-allow-liquor-sales/
661251a62bcSDominik Hassler#
662251a62bcSDominik Hassler# From Ryan Stanley (2019-01-11):
663251a62bcSDominik Hassler# The community will be changing back on the 20th of this month...
664251a62bcSDominik Hassler# From Tim Parenti (2019-01-11):
665251a62bcSDominik Hassler# Per an announcement on the Metlakatla community's official Facebook page, the
666251a62bcSDominik Hassler# "fall back" will be on Sunday 2019-01-20 at 02:00:
667251a62bcSDominik Hassler# https://www.facebook.com/141055983004923/photos/607150969728753/
668251a62bcSDominik Hassler# So they won't be waiting for Alaska to join them on 2019-03-10, but will
669251a62bcSDominik Hassler# rather change their clocks twice in seven weeks.
670251a62bcSDominik Hassler
671af2e290bSAndy Fiddaman# From Paul Eggert (2023-01-23):
672af2e290bSAndy Fiddaman# America/Adak is for the Aleutian Islands that are part of Alaska
673af2e290bSAndy Fiddaman# and are west of 169.5° W.
674af2e290bSAndy Fiddaman
675374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
676b654b02dSYuri PankovZone America/Juneau	 15:02:19 -	LMT	1867 Oct 19 15:33:32
6777c478bd9Sstevel@tonic-gate			 -8:57:41 -	LMT	1900 Aug 20 12:00
6787c478bd9Sstevel@tonic-gate			 -8:00	-	PST	1942
6797c478bd9Sstevel@tonic-gate			 -8:00	US	P%sT	1946
6807c478bd9Sstevel@tonic-gate			 -8:00	-	PST	1969
6816f8e8937SDan McDonald			 -8:00	US	P%sT	1980 Apr 27  2:00
6826f8e8937SDan McDonald			 -9:00	US	Y%sT	1980 Oct 26  2:00
6836f8e8937SDan McDonald			 -8:00	US	P%sT	1983 Oct 30  2:00
6847c478bd9Sstevel@tonic-gate			 -9:00	US	Y%sT	1983 Nov 30
6857c478bd9Sstevel@tonic-gate			 -9:00	US	AK%sT
686b654b02dSYuri PankovZone America/Sitka	 14:58:47 -	LMT	1867 Oct 19 15:30
687abaa65c8SYuri Pankov			 -9:01:13 -	LMT	1900 Aug 20 12:00
688abaa65c8SYuri Pankov			 -8:00	-	PST	1942
689abaa65c8SYuri Pankov			 -8:00	US	P%sT	1946
690abaa65c8SYuri Pankov			 -8:00	-	PST	1969
6916f8e8937SDan McDonald			 -8:00	US	P%sT	1983 Oct 30  2:00
692abaa65c8SYuri Pankov			 -9:00	US	Y%sT	1983 Nov 30
693abaa65c8SYuri Pankov			 -9:00	US	AK%sT
694b654b02dSYuri PankovZone America/Metlakatla	 15:13:42 -	LMT	1867 Oct 19 15:44:55
695abaa65c8SYuri Pankov			 -8:46:18 -	LMT	1900 Aug 20 12:00
696abaa65c8SYuri Pankov			 -8:00	-	PST	1942
697abaa65c8SYuri Pankov			 -8:00	US	P%sT	1946
698abaa65c8SYuri Pankov			 -8:00	-	PST	1969
6996f8e8937SDan McDonald			 -8:00	US	P%sT	1983 Oct 30  2:00
700f63cc156SDan McDonald			 -8:00	-	PST	2015 Nov  1  2:00
701251a62bcSDominik Hassler			 -9:00	US	AK%sT	2018 Nov  4  2:00
702251a62bcSDominik Hassler			 -8:00	-	PST	2019 Jan 20  2:00
703f63cc156SDan McDonald			 -9:00	US	AK%sT
704b654b02dSYuri PankovZone America/Yakutat	 14:41:05 -	LMT	1867 Oct 19 15:12:18
7057c478bd9Sstevel@tonic-gate			 -9:18:55 -	LMT	1900 Aug 20 12:00
7067c478bd9Sstevel@tonic-gate			 -9:00	-	YST	1942
7077c478bd9Sstevel@tonic-gate			 -9:00	US	Y%sT	1946
7087c478bd9Sstevel@tonic-gate			 -9:00	-	YST	1969
7097c478bd9Sstevel@tonic-gate			 -9:00	US	Y%sT	1983 Nov 30
7107c478bd9Sstevel@tonic-gate			 -9:00	US	AK%sT
711b654b02dSYuri PankovZone America/Anchorage	 14:00:24 -	LMT	1867 Oct 19 14:31:37
7127c478bd9Sstevel@tonic-gate			 -9:59:36 -	LMT	1900 Aug 20 12:00
713dafc4501SDan McDonald			-10:00	-	AST	1942
714dafc4501SDan McDonald			-10:00	US	A%sT	1967 Apr
7157c478bd9Sstevel@tonic-gate			-10:00	-	AHST	1969
7166f8e8937SDan McDonald			-10:00	US	AH%sT	1983 Oct 30  2:00
7177c478bd9Sstevel@tonic-gate			 -9:00	US	Y%sT	1983 Nov 30
7187c478bd9Sstevel@tonic-gate			 -9:00	US	AK%sT
719b654b02dSYuri PankovZone America/Nome	 12:58:22 -	LMT	1867 Oct 19 13:29:35
7207c478bd9Sstevel@tonic-gate			-11:01:38 -	LMT	1900 Aug 20 12:00
7217c478bd9Sstevel@tonic-gate			-11:00	-	NST	1942
7227c478bd9Sstevel@tonic-gate			-11:00	US	N%sT	1946
7237c478bd9Sstevel@tonic-gate			-11:00	-	NST	1967 Apr
7247c478bd9Sstevel@tonic-gate			-11:00	-	BST	1969
7256f8e8937SDan McDonald			-11:00	US	B%sT	1983 Oct 30  2:00
7267c478bd9Sstevel@tonic-gate			 -9:00	US	Y%sT	1983 Nov 30
7277c478bd9Sstevel@tonic-gate			 -9:00	US	AK%sT
728b654b02dSYuri PankovZone America/Adak	 12:13:22 -	LMT	1867 Oct 19 12:44:35
7297c478bd9Sstevel@tonic-gate			-11:46:38 -	LMT	1900 Aug 20 12:00
7307c478bd9Sstevel@tonic-gate			-11:00	-	NST	1942
7317c478bd9Sstevel@tonic-gate			-11:00	US	N%sT	1946
7327c478bd9Sstevel@tonic-gate			-11:00	-	NST	1967 Apr
7337c478bd9Sstevel@tonic-gate			-11:00	-	BST	1969
7346f8e8937SDan McDonald			-11:00	US	B%sT	1983 Oct 30  2:00
7357c478bd9Sstevel@tonic-gate			-10:00	US	AH%sT	1983 Nov 30
73656b82ca8SDan McDonald			-10:00	US	H%sT
73706965442SAndy Fiddaman# The following switches don't make our 1970 cutoff.
73806965442SAndy Fiddaman#
73906965442SAndy Fiddaman# Kiska observed Tokyo date and time during Japanese occupation from
74006965442SAndy Fiddaman# 1942-06-06 to 1943-07-29, and similarly for Attu from 1942-06-07 to
74106965442SAndy Fiddaman# 1943-05-29 (all dates American).  Both islands are now uninhabited.
74280868c53Srobbin#
7437c478bd9Sstevel@tonic-gate# Shanks writes that part of southwest Alaska (e.g. Aniak)
7447c478bd9Sstevel@tonic-gate# switched from -11:00 to -10:00 on 1968-09-22 at 02:00,
7457c478bd9Sstevel@tonic-gate# and another part (e.g. Akiak) made the same switch five weeks later.
74680868c53Srobbin#
74780868c53Srobbin# From David Flater (2004-11-09):
74880868c53Srobbin# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska
74980868c53Srobbin# Historic Preservation Commission, provided this information, which
75080868c53Srobbin# suggests that Unalaska deviated from statutory time from early 1967
75180868c53Srobbin# possibly until 1983:
75280868c53Srobbin#
75380868c53Srobbin#  Minutes of the Unalaska City Council Meeting, January 10, 1967:
75480868c53Srobbin#  "Except for St. Paul and Akutan, Unalaska is the only important
75580868c53Srobbin#  location not on Alaska Standard Time.  The following resolution was
7566f8e8937SDan McDonald#  made by William Robinson and seconded by Henry Swanson: Be it
75780868c53Srobbin#  resolved that the City of Unalaska hereby goes to Alaska Standard
75880868c53Srobbin#  Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday,
75980868c53Srobbin#  January 14, Alaska Standard Time.)  This resolution was passed with
76080868c53Srobbin#  three votes for and one against."
7617c478bd9Sstevel@tonic-gate
7627c478bd9Sstevel@tonic-gate# Hawaii
763abaa65c8SYuri Pankov
764abaa65c8SYuri Pankov# From Arthur David Olson (2010-12-09):
765abaa65c8SYuri Pankov# "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225
766abaa65c8SYuri Pankov# of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09,
767abaa65c8SYuri Pankov# the article is available at
768b654b02dSYuri Pankov# https://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf
769abaa65c8SYuri Pankov# and indicates that standard time was adopted effective noon, January
770abaa65c8SYuri Pankov# 13, 1896 (page 218), that in "1933, the Legislature decreed daylight
771abaa65c8SYuri Pankov# saving for the period between the last Sunday of each April and the
772abaa65c8SYuri Pankov# last Sunday of each September, but less than a month later repealed the
773abaa65c8SYuri Pankov# act," (page 220), that year-round daylight saving time was in effect
774abaa65c8SYuri Pankov# from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for
775abaa65c8SYuri Pankov# when clocks changed) and that clocks were changed by 30 minutes
776abaa65c8SYuri Pankov# effective the second Sunday of June, 1947 (page 219, with no time of
777abaa65c8SYuri Pankov# day given for when clocks changed). A footnote for the 1933 changes
778abaa65c8SYuri Pankov# cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933)
779abaa65c8SYuri Pankov# and Act 163 (approved 21 May 1933)."
780abaa65c8SYuri Pankov
781abaa65c8SYuri Pankov# From Arthur David Olson (2011-01-19):
782abaa65c8SYuri Pankov# The following is from "Laws of the Territory of Hawaii Passed by the
783abaa65c8SYuri Pankov# Seventeenth Legislature: Regular Session 1933," available (as of
784abaa65c8SYuri Pankov# 2011-01-19) at American University's Pence Law Library. Page 85: "Act
785abaa65c8SYuri Pankov# 90...At 2 o'clock ante meridian of the last Sunday in April of each
786abaa65c8SYuri Pankov# year, the standard time of this Territory shall be advanced one
787abaa65c8SYuri Pankov# hour...This Act shall take effect upon its approval. Approved this 26th
788abaa65c8SYuri Pankov# day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of
7896f8e8937SDan McDonald# Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is
790abaa65c8SYuri Pankov# hereby repealed...This Act shall take effect upon its approval, upon
791abaa65c8SYuri Pankov# which date the standard time of this Territory shall be restored to
792abaa65c8SYuri Pankov# that existing immediately prior to the taking effect of said Act 90.
793abaa65c8SYuri Pankov# Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor
794abaa65c8SYuri Pankov# of the Territory of Hawaii."
795abaa65c8SYuri Pankov#
796abaa65c8SYuri Pankov# Note that 1933-05-21 was a Sunday.
797abaa65c8SYuri Pankov# We're left to guess the time of day when Act 163 was approved; guess noon.
798abaa65c8SYuri Pankov
799374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
8006f8e8937SDan McDonaldZone Pacific/Honolulu	-10:31:26 -	LMT	1896 Jan 13 12:00
8016f8e8937SDan McDonald			-10:30	-	HST	1933 Apr 30  2:00
8026f8e8937SDan McDonald			-10:30	1:00	HDT	1933 May 21 12:00
80305e627dcSAndy Fiddaman			-10:30	US	H%sT	1947 Jun  8  2:00
8047c478bd9Sstevel@tonic-gate			-10:00	-	HST
805a43ba736SRobert Mustacchi
8067c478bd9Sstevel@tonic-gate# Now we turn to US areas that have diverged from the consensus since 1970.
8077c478bd9Sstevel@tonic-gate
8087c478bd9Sstevel@tonic-gate# Arizona mostly uses MST.
8097c478bd9Sstevel@tonic-gate
8107c478bd9Sstevel@tonic-gate# From Paul Eggert (2002-10-20):
8117c478bd9Sstevel@tonic-gate#
8127c478bd9Sstevel@tonic-gate# The information in the rest of this paragraph is derived from the
8136f8e8937SDan McDonald# Daylight Saving Time web page
8146f8e8937SDan McDonald# <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23)
8156f8e8937SDan McDonald# maintained by the Arizona State Library, Archives and Public Records.
8167c478bd9Sstevel@tonic-gate# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard
8177c478bd9Sstevel@tonic-gate# time, but by federal law railroads, airlines, bus lines, military
8187c478bd9Sstevel@tonic-gate# personnel, and some engaged in interstate commerce continued to
8197c478bd9Sstevel@tonic-gate# observe war (i.e., daylight saving) time.  The 1944-03-17 Phoenix
8207c478bd9Sstevel@tonic-gate# Gazette says that was the date the law changed, and that 04-01 was
8217c478bd9Sstevel@tonic-gate# the date the state's clocks would change.  In 1945 the State of
8227c478bd9Sstevel@tonic-gate# Arizona used standard time all year, again with exceptions only as
8237c478bd9Sstevel@tonic-gate# mandated by federal law.  Arizona observed DST in 1967, but Arizona
8247c478bd9Sstevel@tonic-gate# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST.
8257c478bd9Sstevel@tonic-gate#
8267c478bd9Sstevel@tonic-gate# Shanks says the 1944 experiment came to an end on 1944-03-17.
8277c478bd9Sstevel@tonic-gate# Go with the Arizona State Library instead.
8287c478bd9Sstevel@tonic-gate
829374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
830f117aa50SRobert MustacchiZone America/Phoenix	-7:28:18 -	LMT	1883 Nov 18 19:00u
8316f8e8937SDan McDonald			-7:00	US	M%sT	1944 Jan  1  0:01
8326f8e8937SDan McDonald			-7:00	-	MST	1944 Apr  1  0:01
8336f8e8937SDan McDonald			-7:00	US	M%sT	1944 Oct  1  0:01
8347c478bd9Sstevel@tonic-gate			-7:00	-	MST	1967
8357c478bd9Sstevel@tonic-gate			-7:00	US	M%sT	1968 Mar 21
8367c478bd9Sstevel@tonic-gate			-7:00	-	MST
83706965442SAndy Fiddaman
8387c478bd9Sstevel@tonic-gate# From Arthur David Olson (1988-02-13):
8397c478bd9Sstevel@tonic-gate# A writer from the Inter Tribal Council of Arizona, Inc.,
8407c478bd9Sstevel@tonic-gate# notes in private correspondence dated 1987-12-28 that "Presently, only the
8417c478bd9Sstevel@tonic-gate# Navajo Nation participates in the Daylight Saving Time policy, due to its
8427c478bd9Sstevel@tonic-gate# large size and location in three states."  (The "only" means that other
8437c478bd9Sstevel@tonic-gate# tribal nations don't use DST.)
844a43ba736SRobert Mustacchi#
845a43ba736SRobert Mustacchi# From Paul Eggert (2013-08-26):
846a43ba736SRobert Mustacchi# See America/Denver for a zone appropriate for the Navajo Nation.
8477c478bd9Sstevel@tonic-gate
8487c478bd9Sstevel@tonic-gate# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine,
8497c478bd9Sstevel@tonic-gate# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark,
8507c478bd9Sstevel@tonic-gate# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome,
8517c478bd9Sstevel@tonic-gate# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power,
852b70cafdfSrobbin# Teton, Twin Falls, Valley, Washington counties, and the southern
853b70cafdfSrobbin# quarter of Idaho county) and eastern Oregon (most of Malheur County)
8547c478bd9Sstevel@tonic-gate# switched four weeks late in 1974.
85580868c53Srobbin#
856374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
857f117aa50SRobert MustacchiZone America/Boise	-7:44:49 -	LMT	1883 Nov 18 20:00u
8586f8e8937SDan McDonald			-8:00	US	P%sT	1923 May 13  2:00
8597c478bd9Sstevel@tonic-gate			-7:00	US	M%sT	1974
8606f8e8937SDan McDonald			-7:00	-	MST	1974 Feb  3  2:00
8617c478bd9Sstevel@tonic-gate			-7:00	US	M%sT
8627c478bd9Sstevel@tonic-gate
8637c478bd9Sstevel@tonic-gate# Indiana
8647c478bd9Sstevel@tonic-gate#
8657c478bd9Sstevel@tonic-gate# For a map of Indiana's time zone regions, see:
866b654b02dSYuri Pankov# https://en.wikipedia.org/wiki/Time_in_Indiana
86780868c53Srobbin#
868251a62bcSDominik Hassler# From Paul Eggert (2018-11-30):
869251a62bcSDominik Hassler# A brief but entertaining history of time in Indiana describes a 1949 debate
870251a62bcSDominik Hassler# in the Indiana House where city legislators (who favored "fast time")
871251a62bcSDominik Hassler# tussled with farm legislators (who didn't) over a bill to outlaw DST:
872251a62bcSDominik Hassler#  "Lacking enough votes, the city faction tries to filibuster until time runs
873251a62bcSDominik Hassler#   out on the session at midnight, but rural champion Rep. Herbert Copeland,
874251a62bcSDominik Hassler#   R-Madison, leans over the gallery railing and forces the official clock
875251a62bcSDominik Hassler#   back to 9 p.m., breaking it in the process.  The clock sticks on 9 as the
876251a62bcSDominik Hassler#   debate rages on into the night.  The filibuster finally dies out and the
877251a62bcSDominik Hassler#   bill passes, while outside the chamber, clocks read 3:30 a.m.  In the end,
878251a62bcSDominik Hassler#   it doesn't matter which side won.  The law has no enforcement powers and
879251a62bcSDominik Hassler#   is simply ignored by fast-time communities."
880251a62bcSDominik Hassler# How Indiana went from 'God's time' to split zones and daylight-saving.
881251a62bcSDominik Hassler# Indianapolis Star. 2018-11-27 14:58 -05.
882251a62bcSDominik Hassler# https://www.indystar.com/story/news/politics/2018/11/27/indianapolis-indiana-time-zone-history-central-eastern-daylight-savings-time/2126300002/
883251a62bcSDominik Hassler#
884b70cafdfSrobbin# From Paul Eggert (2007-08-17):
88580868c53Srobbin# Since 1970, most of Indiana has been like America/Indiana/Indianapolis,
88680868c53Srobbin# with the following exceptions:
88780868c53Srobbin#
88880868c53Srobbin# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
8896f8e8937SDan McDonald#   Vanderburgh, and Warrick counties have been like America/Chicago.
89080868c53Srobbin#
89180868c53Srobbin# - Dearborn and Ohio counties have been like America/New_York.
89280868c53Srobbin#
89380868c53Srobbin# - Clark, Floyd, and Harrison counties have been like
89480868c53Srobbin#   America/Kentucky/Louisville.
89580868c53Srobbin#
896b70cafdfSrobbin# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke,
897b70cafdfSrobbin#   and Switzerland counties have their own time zone histories as noted below.
8987c478bd9Sstevel@tonic-gate#
899f430f59aSrobbin# Shanks partitioned Indiana into 345 regions, each with its own time history,
900a43ba736SRobert Mustacchi# and wrote "Even newspaper reports present contradictory information."
9012f9aa4a7Srobbin# Those Hoosiers!  Such a flighty and changeable people!
9027c478bd9Sstevel@tonic-gate# Fortunately, most of the complexity occurred before our cutoff date of 1970.
9037c478bd9Sstevel@tonic-gate#
9047c478bd9Sstevel@tonic-gate# Other than Indianapolis, the Indiana place names are so nondescript
905a43ba736SRobert Mustacchi# that they would be ambiguous if we left them at the 'America' level.
906a43ba736SRobert Mustacchi# So we reluctantly put them all in a subdirectory 'America/Indiana'.
9077c478bd9Sstevel@tonic-gate
9086f8e8937SDan McDonald# From Paul Eggert (2014-06-26):
9096f8e8937SDan McDonald# https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana
9106f8e8937SDan McDonald# says "DOT is relocating the time zone boundary in Indiana to move Starke,
911f430f59aSrobbin# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the
912f430f59aSrobbin# Eastern Time Zone to the Central Time Zone.... The effective date of
9136f8e8937SDan McDonald# this rule is 2 a.m. EST Sunday, April 2, 2006, which is the
914f430f59aSrobbin# changeover date from standard time to Daylight Saving Time."
9156f8e8937SDan McDonald# Strictly speaking, this meant the affected counties changed their
9166f8e8937SDan McDonald# clocks twice that night, but this obviously was in error.  The intent
9176f8e8937SDan McDonald# was that 01:59:59 EST be followed by 02:00:00 CDT.
9187c478bd9Sstevel@tonic-gate
919a68d064cSrobbin# From Gwillim Law (2007-02-10):
920a68d064cSrobbin# The Associated Press has been reporting that Pulaski County, Indiana is
921a68d064cSrobbin# going to switch from Central to Eastern Time on March 11, 2007....
922a68d064cSrobbin# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL
923a68d064cSrobbin
924f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER
9257c478bd9Sstevel@tonic-gateRule Indianapolis 1941	only	-	Jun	22	2:00	1:00	D
9267c478bd9Sstevel@tonic-gateRule Indianapolis 1941	1954	-	Sep	lastSun	2:00	0	S
9277c478bd9Sstevel@tonic-gateRule Indianapolis 1946	1954	-	Apr	lastSun	2:00	1:00	D
928374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
929f117aa50SRobert MustacchiZone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 18:00u
9307c478bd9Sstevel@tonic-gate			-6:00	US	C%sT	1920
9317c478bd9Sstevel@tonic-gate			-6:00 Indianapolis C%sT	1942
9327c478bd9Sstevel@tonic-gate			-6:00	US	C%sT	1946
9336f8e8937SDan McDonald			-6:00 Indianapolis C%sT	1955 Apr 24  2:00
9346f8e8937SDan McDonald			-5:00	-	EST	1957 Sep 29  2:00
9356f8e8937SDan McDonald			-6:00	-	CST	1958 Apr 27  2:00
9367c478bd9Sstevel@tonic-gate			-5:00	-	EST	1969
9377c478bd9Sstevel@tonic-gate			-5:00	US	E%sT	1971
93880868c53Srobbin			-5:00	-	EST	2006
93980868c53Srobbin			-5:00	US	E%sT
9407c478bd9Sstevel@tonic-gate#
941f430f59aSrobbin# Eastern Crawford County, Indiana, left its clocks alone in 1974,
942f430f59aSrobbin# as well as from 1976 through 2005.
943f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER
9447c478bd9Sstevel@tonic-gateRule	Marengo	1951	only	-	Apr	lastSun	2:00	1:00	D
9457c478bd9Sstevel@tonic-gateRule	Marengo	1951	only	-	Sep	lastSun	2:00	0	S
9467c478bd9Sstevel@tonic-gateRule	Marengo	1954	1960	-	Apr	lastSun	2:00	1:00	D
9477c478bd9Sstevel@tonic-gateRule	Marengo	1954	1960	-	Sep	lastSun	2:00	0	S
948374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
949f117aa50SRobert MustacchiZone America/Indiana/Marengo -5:45:23 -	LMT	1883 Nov 18 18:00u
9507c478bd9Sstevel@tonic-gate			-6:00	US	C%sT	1951
9516f8e8937SDan McDonald			-6:00	Marengo	C%sT	1961 Apr 30  2:00
9527c478bd9Sstevel@tonic-gate			-5:00	-	EST	1969
9536f8e8937SDan McDonald			-5:00	US	E%sT	1974 Jan  6  2:00
9546f8e8937SDan McDonald			-6:00	1:00	CDT	1974 Oct 27  2:00
9557c478bd9Sstevel@tonic-gate			-5:00	US	E%sT	1976
95680868c53Srobbin			-5:00	-	EST	2006
95780868c53Srobbin			-5:00	US	E%sT
9587c478bd9Sstevel@tonic-gate#
959b70cafdfSrobbin# Daviess, Dubois, Knox, and Martin Counties, Indiana,
960b70cafdfSrobbin# switched from eastern to central time in April 2006, then switched back
961b70cafdfSrobbin# in November 2007.
962f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER
963f430f59aSrobbinRule Vincennes	1946	only	-	Apr	lastSun	2:00	1:00	D
964f430f59aSrobbinRule Vincennes	1946	only	-	Sep	lastSun	2:00	0	S
965f430f59aSrobbinRule Vincennes	1953	1954	-	Apr	lastSun	2:00	1:00	D
966f430f59aSrobbinRule Vincennes	1953	1959	-	Sep	lastSun	2:00	0	S
967f430f59aSrobbinRule Vincennes	1955	only	-	May	 1	0:00	1:00	D
968f430f59aSrobbinRule Vincennes	1956	1963	-	Apr	lastSun	2:00	1:00	D
969f430f59aSrobbinRule Vincennes	1960	only	-	Oct	lastSun	2:00	0	S
970f430f59aSrobbinRule Vincennes	1961	only	-	Sep	lastSun	2:00	0	S
971f430f59aSrobbinRule Vincennes	1962	1963	-	Oct	lastSun	2:00	0	S
972374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
973f117aa50SRobert MustacchiZone America/Indiana/Vincennes -5:50:07 - LMT	1883 Nov 18 18:00u
974f430f59aSrobbin			-6:00	US	C%sT	1946
9756f8e8937SDan McDonald			-6:00 Vincennes	C%sT	1964 Apr 26  2:00
976f430f59aSrobbin			-5:00	-	EST	1969
977f430f59aSrobbin			-5:00	US	E%sT	1971
9786f8e8937SDan McDonald			-5:00	-	EST	2006 Apr  2  2:00
9796f8e8937SDan McDonald			-6:00	US	C%sT	2007 Nov  4  2:00
980b70cafdfSrobbin			-5:00	US	E%sT
981b70cafdfSrobbin#
982b70cafdfSrobbin# Perry County, Indiana, switched from eastern to central time in April 2006.
98306965442SAndy Fiddaman# From Alois Treindl (2019-07-09):
984374df668SAndy Fiddaman# The Indianapolis News, Friday 27 October 1967 states that Perry County
985374df668SAndy Fiddaman# returned to CST.  It went again to EST on 27 April 1969, as documented by the
986374df668SAndy Fiddaman# Indianapolis star of Saturday 26 April.
987f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER
988b70cafdfSrobbinRule Perry	1955	only	-	May	 1	0:00	1:00	D
989374df668SAndy FiddamanRule Perry	1955	1960	-	Sep	lastSun	2:00	0	S
990b70cafdfSrobbinRule Perry	1956	1963	-	Apr	lastSun	2:00	1:00	D
991374df668SAndy FiddamanRule Perry	1961	1963	-	Oct	lastSun	2:00	0	S
992374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
993f117aa50SRobert MustacchiZone America/Indiana/Tell_City -5:47:03 - LMT	1883 Nov 18 18:00u
994b70cafdfSrobbin			-6:00	US	C%sT	1946
9956f8e8937SDan McDonald			-6:00 Perry	C%sT	1964 Apr 26  2:00
996374df668SAndy Fiddaman			-5:00	-	EST	1967 Oct 29  2:00
997374df668SAndy Fiddaman			-6:00	US	C%sT	1969 Apr 27  2:00
998b70cafdfSrobbin			-5:00	US	E%sT	1971
9996f8e8937SDan McDonald			-5:00	-	EST	2006 Apr  2  2:00
1000f430f59aSrobbin			-6:00	US	C%sT
10012f9aa4a7Srobbin#
1002f430f59aSrobbin# Pike County, Indiana moved from central to eastern time in 1977,
1003b70cafdfSrobbin# then switched back in 2006, then switched back again in 2007.
1004f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER
1005f430f59aSrobbinRule	Pike	1955	only	-	May	 1	0:00	1:00	D
1006f430f59aSrobbinRule	Pike	1955	1960	-	Sep	lastSun	2:00	0	S
1007f430f59aSrobbinRule	Pike	1956	1964	-	Apr	lastSun	2:00	1:00	D
1008f430f59aSrobbinRule	Pike	1961	1964	-	Oct	lastSun	2:00	0	S
1009374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
1010f117aa50SRobert MustacchiZone America/Indiana/Petersburg -5:49:07 - LMT	1883 Nov 18 18:00u
1011f430f59aSrobbin			-6:00	US	C%sT	1955
10126f8e8937SDan McDonald			-6:00	Pike	C%sT	1965 Apr 25  2:00
10136f8e8937SDan McDonald			-5:00	-	EST	1966 Oct 30  2:00
10146f8e8937SDan McDonald			-6:00	US	C%sT	1977 Oct 30  2:00
10156f8e8937SDan McDonald			-5:00	-	EST	2006 Apr  2  2:00
10166f8e8937SDan McDonald			-6:00	US	C%sT	2007 Nov  4  2:00
1017b70cafdfSrobbin			-5:00	US	E%sT
1018f430f59aSrobbin#
1019f430f59aSrobbin# Starke County, Indiana moved from central to eastern time in 1991,
1020f430f59aSrobbin# then switched back in 2006.
10217c478bd9Sstevel@tonic-gate# From Arthur David Olson (1991-10-28):
10227c478bd9Sstevel@tonic-gate# An article on page A3 of the Sunday, 1991-10-27 Washington Post
10237c478bd9Sstevel@tonic-gate# notes that Starke County switched from Central time to Eastern time as of
10247c478bd9Sstevel@tonic-gate# 1991-10-27.
1025f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER
10267c478bd9Sstevel@tonic-gateRule	Starke	1947	1961	-	Apr	lastSun	2:00	1:00	D
10277c478bd9Sstevel@tonic-gateRule	Starke	1947	1954	-	Sep	lastSun	2:00	0	S
10287c478bd9Sstevel@tonic-gateRule	Starke	1955	1956	-	Oct	lastSun	2:00	0	S
10297c478bd9Sstevel@tonic-gateRule	Starke	1957	1958	-	Sep	lastSun	2:00	0	S
10307c478bd9Sstevel@tonic-gateRule	Starke	1959	1961	-	Oct	lastSun	2:00	0	S
1031374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
1032f117aa50SRobert MustacchiZone America/Indiana/Knox -5:46:30 -	LMT	1883 Nov 18 18:00u
10337c478bd9Sstevel@tonic-gate			-6:00	US	C%sT	1947
10346f8e8937SDan McDonald			-6:00	Starke	C%sT	1962 Apr 29  2:00
10356f8e8937SDan McDonald			-5:00	-	EST	1963 Oct 27  2:00
10366f8e8937SDan McDonald			-6:00	US	C%sT	1991 Oct 27  2:00
10376f8e8937SDan McDonald			-5:00	-	EST	2006 Apr  2  2:00
1038f430f59aSrobbin			-6:00	US	C%sT
10397c478bd9Sstevel@tonic-gate#
1040a68d064cSrobbin# Pulaski County, Indiana, switched from eastern to central time in
1041a68d064cSrobbin# April 2006 and then switched back in March 2007.
1042f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER
1043a68d064cSrobbinRule	Pulaski	1946	1960	-	Apr	lastSun	2:00	1:00	D
1044a68d064cSrobbinRule	Pulaski	1946	1954	-	Sep	lastSun	2:00	0	S
1045a68d064cSrobbinRule	Pulaski	1955	1956	-	Oct	lastSun	2:00	0	S
1046a68d064cSrobbinRule	Pulaski	1957	1960	-	Sep	lastSun	2:00	0	S
1047374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
1048f117aa50SRobert MustacchiZone America/Indiana/Winamac -5:46:25 - LMT	1883 Nov 18 18:00u
1049a68d064cSrobbin			-6:00	US	C%sT	1946
10506f8e8937SDan McDonald			-6:00	Pulaski	C%sT	1961 Apr 30  2:00
1051a68d064cSrobbin			-5:00	-	EST	1969
1052a68d064cSrobbin			-5:00	US	E%sT	1971
10536f8e8937SDan McDonald			-5:00	-	EST	2006 Apr  2  2:00
10546f8e8937SDan McDonald			-6:00	US	C%sT	2007 Mar 11  2:00
1055a68d064cSrobbin			-5:00	US	E%sT
1056a68d064cSrobbin#
1057f430f59aSrobbin# Switzerland County, Indiana, did not observe DST from 1973 through 2005.
1058374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
1059f117aa50SRobert MustacchiZone America/Indiana/Vevay -5:40:16 -	LMT	1883 Nov 18 18:00u
10606f8e8937SDan McDonald			-6:00	US	C%sT	1954 Apr 25  2:00
10617c478bd9Sstevel@tonic-gate			-5:00	-	EST	1969
10627c478bd9Sstevel@tonic-gate			-5:00	US	E%sT	1973
106380868c53Srobbin			-5:00	-	EST	2006
106480868c53Srobbin			-5:00	US	E%sT
10657c478bd9Sstevel@tonic-gate
10663508b934SYuri Pankov# From Paul Eggert (2018-03-20):
10673508b934SYuri Pankov# The Louisville & Nashville Railroad's 1883-11-18 change occurred at
10683508b934SYuri Pankov# 10:00 old local time; train were supposed to come to a standstill
10693508b934SYuri Pankov# for precisely 18 minutes.  See Bartky Fig. 1 (page 50).  It is not
10703508b934SYuri Pankov# clear how this matched civil time in Louisville, so for now continue
10713508b934SYuri Pankov# to assume Louisville switched at noon new local time, like New York.
10723508b934SYuri Pankov#
1073374df668SAndy Fiddaman# From Michael Deckers (2019-08-06):
1074374df668SAndy Fiddaman# From the contemporary source given by Alois Treindl,
1075374df668SAndy Fiddaman# the switch in Louisville on 1946-04-28 was on 00:01
1076374df668SAndy Fiddaman# From Paul Eggert (2019-08-26):
1077374df668SAndy Fiddaman# That source was the Louisville Courier-Journal, 1946-04-27, p 4.
1078374df668SAndy Fiddaman# Shanks gives 02:00 for all 20th-century transition times in Louisville.
1079374df668SAndy Fiddaman# Evidently this is wrong for spring 1946.  Although also likely wrong
1080374df668SAndy Fiddaman# for other dates, we have no data.
1081374df668SAndy Fiddaman#
10827c478bd9Sstevel@tonic-gate# Part of Kentucky left its clocks alone in 1974.
108380868c53Srobbin# This also includes Clark, Floyd, and Harrison counties in Indiana.
1084f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER
10857c478bd9Sstevel@tonic-gateRule Louisville	1921	only	-	May	1	2:00	1:00	D
10867c478bd9Sstevel@tonic-gateRule Louisville	1921	only	-	Sep	1	2:00	0	S
1087374df668SAndy FiddamanRule Louisville	1941	only	-	Apr	lastSun	2:00	1:00	D
10887c478bd9Sstevel@tonic-gateRule Louisville	1941	only	-	Sep	lastSun	2:00	0	S
1089374df668SAndy FiddamanRule Louisville	1946	only	-	Apr	lastSun	0:01	1:00	D
10907c478bd9Sstevel@tonic-gateRule Louisville	1946	only	-	Jun	2	2:00	0	S
1091374df668SAndy FiddamanRule Louisville	1950	1961	-	Apr	lastSun	2:00	1:00	D
10927c478bd9Sstevel@tonic-gateRule Louisville	1950	1955	-	Sep	lastSun	2:00	0	S
1093374df668SAndy FiddamanRule Louisville	1956	1961	-	Oct	lastSun	2:00	0	S
1094374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
1095f117aa50SRobert MustacchiZone America/Kentucky/Louisville -5:43:02 - LMT	1883 Nov 18 18:00u
10967c478bd9Sstevel@tonic-gate			-6:00	US	C%sT	1921
10977c478bd9Sstevel@tonic-gate			-6:00 Louisville C%sT	1942
10987c478bd9Sstevel@tonic-gate			-6:00	US	C%sT	1946
10996f8e8937SDan McDonald			-6:00 Louisville C%sT	1961 Jul 23  2:00
11007c478bd9Sstevel@tonic-gate			-5:00	-	EST	1968
11016f8e8937SDan McDonald			-5:00	US	E%sT	1974 Jan  6  2:00
11026f8e8937SDan McDonald			-6:00	1:00	CDT	1974 Oct 27  2:00
11037c478bd9Sstevel@tonic-gate			-5:00	US	E%sT
11047c478bd9Sstevel@tonic-gate#
1105f430f59aSrobbin# Wayne County, Kentucky
11067c478bd9Sstevel@tonic-gate#
11076f8e8937SDan McDonald# From Lake Cumberland LIFE
11086f8e8937SDan McDonald# http://www.lake-cumberland.com/life/archive/news990129time.shtml
11096f8e8937SDan McDonald# (1999-01-29) via WKYM-101.7:
11107c478bd9Sstevel@tonic-gate# Clinton County has joined Wayne County in asking the DoT to change from
11117c478bd9Sstevel@tonic-gate# the Central to the Eastern time zone....  The Wayne County government made
11127c478bd9Sstevel@tonic-gate# the same request in December.  And while Russell County officials have not
11137c478bd9Sstevel@tonic-gate# taken action, the majority of respondents to a poll conducted there in
11147c478bd9Sstevel@tonic-gate# August indicated they would like to change to "fast time" also.
11157c478bd9Sstevel@tonic-gate# The three Lake Cumberland counties are the farthest east of any U.S.
11167c478bd9Sstevel@tonic-gate# location in the Central time zone.
11177c478bd9Sstevel@tonic-gate#
11187c478bd9Sstevel@tonic-gate# From Rich Wales (2000-08-29):
11197c478bd9Sstevel@tonic-gate# After prolonged debate, and despite continuing deep differences of opinion,
11207c478bd9Sstevel@tonic-gate# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern
11217c478bd9Sstevel@tonic-gate# (-0500) time.  They won't "fall back" this year.  See Sara Shipley,
11227c478bd9Sstevel@tonic-gate# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400).
11237c478bd9Sstevel@tonic-gate#
11247c478bd9Sstevel@tonic-gate# From Paul Eggert (2001-07-16):
11257c478bd9Sstevel@tonic-gate# The final rule was published in the
11266f8e8937SDan McDonald# Federal Register 65, 160 (2000-08-17), pp 50154-50158.
1127b654b02dSYuri Pankov# https://www.gpo.gov/fdsys/pkg/FR-2000-08-17/html/00-20854.htm
11287c478bd9Sstevel@tonic-gate#
1129f117aa50SRobert MustacchiZone America/Kentucky/Monticello -5:39:24 - LMT	1883 Nov 18 18:00u
11307c478bd9Sstevel@tonic-gate			-6:00	US	C%sT	1946
11317c478bd9Sstevel@tonic-gate			-6:00	-	CST	1968
11327c478bd9Sstevel@tonic-gate			-6:00	US	C%sT	2000 Oct 29  2:00
11337c478bd9Sstevel@tonic-gate			-5:00	US	E%sT
11347c478bd9Sstevel@tonic-gate
11357c478bd9Sstevel@tonic-gate
11367c478bd9Sstevel@tonic-gate# From Rives McDow (2000-08-30):
11377c478bd9Sstevel@tonic-gate# Here ... are all the changes in the US since 1985.
11387c478bd9Sstevel@tonic-gate# Kearny County, KS (put all of county on central;
11397c478bd9Sstevel@tonic-gate#	previously split between MST and CST) ... 1990-10
11407c478bd9Sstevel@tonic-gate# Starke County, IN (from CST to EST) ... 1991-10
11417c478bd9Sstevel@tonic-gate# Oliver County, ND (from MST to CST) ... 1992-10
11427c478bd9Sstevel@tonic-gate# West Wendover, NV (from PST TO MST) ... 1999-10
11437c478bd9Sstevel@tonic-gate# Wayne County, KY (from CST to EST) ... 2000-10
11447c478bd9Sstevel@tonic-gate#
11457c478bd9Sstevel@tonic-gate# From Paul Eggert (2001-07-17):
11467c478bd9Sstevel@tonic-gate# We don't know where the line used to be within Kearny County, KS,
11477c478bd9Sstevel@tonic-gate# so omit that change for now.
11487c478bd9Sstevel@tonic-gate# See America/Indiana/Knox for the Starke County, IN change.
11497c478bd9Sstevel@tonic-gate# See America/North_Dakota/Center for the Oliver County, ND change.
11507c478bd9Sstevel@tonic-gate# West Wendover, NV officially switched from Pacific to mountain time on
11517c478bd9Sstevel@tonic-gate# 1999-10-31.  See the
11526f8e8937SDan McDonald# Federal Register 64, 203 (1999-10-21), pp 56705-56707.
1153b654b02dSYuri Pankov# https://www.gpo.gov/fdsys/pkg/FR-1999-10-21/html/99-27240.htm
11547c478bd9Sstevel@tonic-gate# However, the Federal Register says that West Wendover already operated
11557c478bd9Sstevel@tonic-gate# on mountain time, and the rule merely made this official;
11567c478bd9Sstevel@tonic-gate# hence a separate tz entry is not needed.
11577c478bd9Sstevel@tonic-gate
11587c478bd9Sstevel@tonic-gate# Michigan
11597c478bd9Sstevel@tonic-gate#
11607c478bd9Sstevel@tonic-gate# From Bob Devine (1988-01-28):
11617c478bd9Sstevel@tonic-gate# Michigan didn't observe DST from 1968 to 1973.
11627c478bd9Sstevel@tonic-gate#
11637c478bd9Sstevel@tonic-gate# From Paul Eggert (1999-03-31):
11647c478bd9Sstevel@tonic-gate# Shanks writes that Michigan started using standard time on 1885-09-18,
11657c478bd9Sstevel@tonic-gate# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01)
11667c478bd9Sstevel@tonic-gate# that Detroit kept
11677c478bd9Sstevel@tonic-gate#
11687c478bd9Sstevel@tonic-gate#	local time until 1900 when the City Council decreed that clocks should
11697c478bd9Sstevel@tonic-gate#	be put back twenty-eight minutes to Central Standard Time.  Half the
11707c478bd9Sstevel@tonic-gate#	city obeyed, half refused.  After considerable debate, the decision
11717c478bd9Sstevel@tonic-gate#	was rescinded and the city reverted to Sun time.  A derisive offer to
11727c478bd9Sstevel@tonic-gate#	erect a sundial in front of the city hall was referred to the
11737c478bd9Sstevel@tonic-gate#	Committee on Sewers.  Then, in 1905, Central time was adopted
11747c478bd9Sstevel@tonic-gate#	by city vote.
11757c478bd9Sstevel@tonic-gate#
11767c478bd9Sstevel@tonic-gate# This story is too entertaining to be false, so go with Howse over Shanks.
11777c478bd9Sstevel@tonic-gate#
11787c478bd9Sstevel@tonic-gate# From Paul Eggert (2001-03-06):
1179a43ba736SRobert Mustacchi# Garland (1927) writes "Cleveland and Detroit advanced their clocks
1180a43ba736SRobert Mustacchi# one hour in 1914."  This change is not in Shanks.  We have no more
11817c478bd9Sstevel@tonic-gate# info, so omit this for now.
11827c478bd9Sstevel@tonic-gate#
1183374df668SAndy Fiddaman# From Paul Eggert (2019-07-06):
1184374df668SAndy Fiddaman# Due to a complicated set of legal maneuvers, in 1967 Michigan did
1185374df668SAndy Fiddaman# not start daylight saving time when the rest of the US did.
1186374df668SAndy Fiddaman# Instead, it began DST on Jun 14 at 00:01.  This was big news:
1187374df668SAndy Fiddaman# the Detroit Free Press reported it at the top of Page 1 on
1188374df668SAndy Fiddaman# 1967-06-14, in an article "State Adjusting to Switch to Fast Time"
1189374df668SAndy Fiddaman# by Gary Blonston, above an article about Thurgood Marshall's
1190374df668SAndy Fiddaman# confirmation to the US Supreme Court.  Although Shanks says Detroit
1191374df668SAndy Fiddaman# observed DST until 1967-10-29 00:01, that time of day seems to be
1192374df668SAndy Fiddaman# incorrect, as the Free Press later said DST ended in Michigan at the
1193374df668SAndy Fiddaman# same time as the rest of the US.  Also, although Shanks reports no DST in
1194374df668SAndy Fiddaman# Detroit in 1968, it did observe DST that year; in the November 1968
1195374df668SAndy Fiddaman# election Michigan voters narrowly repealed DST, effective 1969.
1196b654b02dSYuri Pankov#
11977c478bd9Sstevel@tonic-gate# Most of Michigan observed DST from 1973 on, but was a bit late in 1975.
1198f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER
11997c478bd9Sstevel@tonic-gateRule	Detroit	1948	only	-	Apr	lastSun	2:00	1:00	D
12007c478bd9Sstevel@tonic-gateRule	Detroit	1948	only	-	Sep	lastSun	2:00	0	S
1201374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
12027c478bd9Sstevel@tonic-gateZone America/Detroit	-5:32:11 -	LMT	1905
12036f8e8937SDan McDonald			-6:00	-	CST	1915 May 15  2:00
12047c478bd9Sstevel@tonic-gate			-5:00	-	EST	1942
12057c478bd9Sstevel@tonic-gate			-5:00	US	E%sT	1946
1206374df668SAndy Fiddaman			-5:00	Detroit	E%sT	1967 Jun 14  0:01
1207374df668SAndy Fiddaman			-5:00	US	E%sT	1969
1208374df668SAndy Fiddaman			-5:00	-	EST	1973
12097c478bd9Sstevel@tonic-gate			-5:00	US	E%sT	1975
12106f8e8937SDan McDonald			-5:00	-	EST	1975 Apr 27  2:00
12117c478bd9Sstevel@tonic-gate			-5:00	US	E%sT
12127c478bd9Sstevel@tonic-gate#
1213f430f59aSrobbin# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan,
1214f430f59aSrobbin# switched from EST to CST/CDT in 1973.
1215f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER
12167c478bd9Sstevel@tonic-gateRule Menominee	1946	only	-	Apr	lastSun	2:00	1:00	D
12177c478bd9Sstevel@tonic-gateRule Menominee	1946	only	-	Sep	lastSun	2:00	0	S
12187c478bd9Sstevel@tonic-gateRule Menominee	1966	only	-	Apr	lastSun	2:00	1:00	D
12197c478bd9Sstevel@tonic-gateRule Menominee	1966	only	-	Oct	lastSun	2:00	0	S
1220374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
12217c478bd9Sstevel@tonic-gateZone America/Menominee	-5:50:27 -	LMT	1885 Sep 18 12:00
12227c478bd9Sstevel@tonic-gate			-6:00	US	C%sT	1946
12236f8e8937SDan McDonald			-6:00 Menominee	C%sT	1969 Apr 27  2:00
12246f8e8937SDan McDonald			-5:00	-	EST	1973 Apr 29  2:00
12257c478bd9Sstevel@tonic-gate			-6:00	US	C%sT
12267c478bd9Sstevel@tonic-gate
12277c478bd9Sstevel@tonic-gate# Navassa
12287c478bd9Sstevel@tonic-gate# administered by the US Fish and Wildlife Service
12297c478bd9Sstevel@tonic-gate# claimed by US under the provisions of the 1856 Guano Islands Act
12307c478bd9Sstevel@tonic-gate# also claimed by Haiti
12317c478bd9Sstevel@tonic-gate# occupied 1857/1900 by the Navassa Phosphate Co
12327c478bd9Sstevel@tonic-gate# US lighthouse 1917/1996-09
12337c478bd9Sstevel@tonic-gate# currently uninhabited
1234a43ba736SRobert Mustacchi# see Mark Fineman, "An Isle Rich in Guano and Discord",
12357c478bd9Sstevel@tonic-gate# _Los Angeles Times_ (1998-11-10), A1, A10; it cites
12367c478bd9Sstevel@tonic-gate# Jimmy Skaggs, _The Great Guano Rush_ (1994).
12377c478bd9Sstevel@tonic-gate
12387c478bd9Sstevel@tonic-gate################################################################################
12397c478bd9Sstevel@tonic-gate
12407c478bd9Sstevel@tonic-gate
1241dafc4501SDan McDonald# From Paul Eggert (2017-02-10):
124200973057SDan McDonald#
124300973057SDan McDonald# Unless otherwise specified, the source for data through 1990 is:
12442f9aa4a7Srobbin# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
12452f9aa4a7Srobbin# San Diego: ACS Publications, Inc. (2003).
124600973057SDan McDonald# Unfortunately this book contains many errors and cites no sources.
12477c478bd9Sstevel@tonic-gate#
1248dafc4501SDan McDonald# Many years ago Gwillim Law wrote that a good source
1249dafc4501SDan McDonald# for time zone data was the International Air Transport
12507c478bd9Sstevel@tonic-gate# Association's Standard Schedules Information Manual (IATA SSIM),
12517c478bd9Sstevel@tonic-gate# published semiannually.  Law sent in several helpful summaries
125200973057SDan McDonald# of the IATA's data after 1990.  Except where otherwise noted,
125300973057SDan McDonald# IATA SSIM is the source for entries after 1990.
12547c478bd9Sstevel@tonic-gate#
12557c478bd9Sstevel@tonic-gate# Other sources occasionally used include:
12567c478bd9Sstevel@tonic-gate#
1257374df668SAndy Fiddaman#	Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94
1258374df668SAndy Fiddaman#	<https://www.jstor.org/stable/1774359>.
1259374df668SAndy Fiddaman#
1260374df668SAndy Fiddaman#	Pearce C. The Great Daylight Saving Time Controversy.
1261374df668SAndy Fiddaman#	Australian Ebook Publisher. 2017. ISBN 978-1-925516-96-8.
1262374df668SAndy Fiddaman#
12637c478bd9Sstevel@tonic-gate#	Edward W. Whitman, World Time Differences,
12647c478bd9Sstevel@tonic-gate#	Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated),
12657c478bd9Sstevel@tonic-gate#	which I found in the UCLA library.
12667c478bd9Sstevel@tonic-gate#
12677c478bd9Sstevel@tonic-gate#	William Willett, The Waste of Daylight, 19th edition
12686f8e8937SDan McDonald#	<http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf>
12696f8e8937SDan McDonald#	[PDF] (1914-03)
12707c478bd9Sstevel@tonic-gate#
1271*e15592c8SRobert Mustacchi# For the 1911/1912 establishment of standard time in French possessions, see:
1272*e15592c8SRobert Mustacchi# Société Française de Physique, Recueil de constantes physiques (1913),
1273*e15592c8SRobert Mustacchi# page 752, 18b.
1274*e15592c8SRobert Mustacchi#
1275a43ba736SRobert Mustacchi# See the 'europe' file for Greenland.
12767c478bd9Sstevel@tonic-gate
12777c478bd9Sstevel@tonic-gate# Canada
12787c478bd9Sstevel@tonic-gate
12796f8e8937SDan McDonald# From Alain LaBonté (1994-11-14):
12807c478bd9Sstevel@tonic-gate# I post here the time zone abbreviations standardized in Canada
12817c478bd9Sstevel@tonic-gate# for both English and French in the CAN/CSA-Z234.4-89 standard....
12827c478bd9Sstevel@tonic-gate#
12836f8e8937SDan McDonald#	UTC	Standard time	Daylight saving time
12847c478bd9Sstevel@tonic-gate#	offset	French	English	French	English
12857c478bd9Sstevel@tonic-gate#	-2:30	-	-	HAT	NDT
12867c478bd9Sstevel@tonic-gate#	-3	-	-	HAA	ADT
12877c478bd9Sstevel@tonic-gate#	-3:30	HNT	NST	-	-
12887c478bd9Sstevel@tonic-gate#	-4	HNA	AST	HAE	EDT
12897c478bd9Sstevel@tonic-gate#	-5	HNE	EST	HAC	CDT
12907c478bd9Sstevel@tonic-gate#	-6	HNC	CST	HAR	MDT
12917c478bd9Sstevel@tonic-gate#	-7	HNR	MST	HAP	PDT
12927c478bd9Sstevel@tonic-gate#	-8	HNP	PST	HAY	YDT
12937c478bd9Sstevel@tonic-gate#	-9	HNY	YST	-	-
12947c478bd9Sstevel@tonic-gate#
12957c478bd9Sstevel@tonic-gate#	HN: Heure Normale	ST: Standard Time
12966f8e8937SDan McDonald#	HA: Heure Avancée	DT: Daylight saving Time
12977c478bd9Sstevel@tonic-gate#
12987c478bd9Sstevel@tonic-gate#	A: de l'Atlantique	Atlantic
12997c478bd9Sstevel@tonic-gate#	C: du Centre		Central
13007c478bd9Sstevel@tonic-gate#	E: de l'Est		Eastern
13017c478bd9Sstevel@tonic-gate#	M:			Mountain
13027c478bd9Sstevel@tonic-gate#	N:			Newfoundland
13037c478bd9Sstevel@tonic-gate#	P: du Pacifique		Pacific
13047c478bd9Sstevel@tonic-gate#	R: des Rocheuses
13057c478bd9Sstevel@tonic-gate#	T: de Terre-Neuve
13067c478bd9Sstevel@tonic-gate#	Y: du Yukon		Yukon
13077c478bd9Sstevel@tonic-gate#
130880868c53Srobbin# From Paul Eggert (1994-11-22):
13097c478bd9Sstevel@tonic-gate# Alas, this sort of thing must be handled by localization software.
13107c478bd9Sstevel@tonic-gate
13116f8e8937SDan McDonald# Unless otherwise specified, the data entries for Canada are all from Shanks
13122f9aa4a7Srobbin# & Pottenger.
13132f9aa4a7Srobbin
1314a68d064cSrobbin# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31,
1315a68d064cSrobbin# 2007-03-01):
13162f9aa4a7Srobbin# The British Columbia government announced yesterday that it will
13172f9aa4a7Srobbin# adjust daylight savings next year to align with changes in the
13182f9aa4a7Srobbin# U.S. and the rest of Canada....
1319b654b02dSYuri Pankov# https://archive.news.gov.bc.ca/releases/news_releases_2005-2009/2006AG0014-000330.htm
1320a68d064cSrobbin# ...
1321a68d064cSrobbin# Nova Scotia
13222f9aa4a7Srobbin# Daylight saving time will be extended by four weeks starting in 2007....
1323b654b02dSYuri Pankov# https://www.novascotia.ca/just/regulations/rg2/2006/ma1206.pdf
1324a68d064cSrobbin#
13252f9aa4a7Srobbin# [For New Brunswick] the new legislation dictates that the time change is to
13262f9aa4a7Srobbin# be done at 02:00 instead of 00:01.
1327b654b02dSYuri Pankov# https://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf
13282f9aa4a7Srobbin# ...
13292f9aa4a7Srobbin# Manitoba has traditionally changed the clock every fall at 03:00.
13302f9aa4a7Srobbin# As of 2006, the transition is to take place one hour earlier at 02:00.
1331b654b02dSYuri Pankov# https://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php
13322f9aa4a7Srobbin# ...
13332f9aa4a7Srobbin# [Alberta, Ontario, Quebec] will follow US rules.
1334a68d064cSrobbin# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM
13352f9aa4a7Srobbin# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm
1336a68d064cSrobbin# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF
1337a68d064cSrobbin# ...
1338a68d064cSrobbin# P.E.I. will follow US rules....
1339a68d064cSrobbin# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf
13402f9aa4a7Srobbin# ...
1341a68d064cSrobbin# Province of Newfoundland and Labrador....
1342a68d064cSrobbin# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm
13432f9aa4a7Srobbin# ...
1344a68d064cSrobbin# Yukon
1345b654b02dSYuri Pankov# https://www.gov.yk.ca/legislation/regs/oic2006_127.pdf
13462f9aa4a7Srobbin# ...
13472f9aa4a7Srobbin# N.W.T. will follow US rules.  Whoever maintains the government web site
13482f9aa4a7Srobbin# does not seem to believe in bookmarks.  To see the news release, click the
13492f9aa4a7Srobbin# following link and search for "Daylight Savings Time Change".  Press the
13502f9aa4a7Srobbin# "Daylight Savings Time Change" link; it will fire off a popup using
13512f9aa4a7Srobbin# JavaScript.
13522f9aa4a7Srobbin# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive
1353a68d064cSrobbin# ...
1354a68d064cSrobbin# Nunavut
1355a68d064cSrobbin# An amendment to the Interpretation Act was registered on February 19/2007....
1356a68d064cSrobbin# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf
13572f9aa4a7Srobbin
135800973057SDan McDonald# From Paul Eggert (2014-10-18):
13597c478bd9Sstevel@tonic-gate# H. David Matthews and Mary Vincent's map
13607c478bd9Sstevel@tonic-gate# "It's about TIME", _Canadian Geographic_ (September-October 1998)
1361*e15592c8SRobert Mustacchi# https://web.archive.org/web/19990827055050/https://canadiangeographic.ca/SO98/geomap.htm
13626f8e8937SDan McDonald# contains detailed boundaries for regions observing nonstandard
13637c478bd9Sstevel@tonic-gate# time and daylight saving time arrangements in Canada circa 1998.
13647c478bd9Sstevel@tonic-gate#
136500973057SDan McDonald# National Research Council Canada maintains info about time zones and DST.
1366b654b02dSYuri Pankov# https://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html
1367b654b02dSYuri Pankov# https://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5
13687c478bd9Sstevel@tonic-gate# Its unofficial information is often taken from Matthews and Vincent.
13692f9aa4a7Srobbin
13702f9aa4a7Srobbin# From Paul Eggert (2006-06-27):
13712f9aa4a7Srobbin# For now, assume all of DST-observing Canada will fall into line with the
13722f9aa4a7Srobbin# new US DST rules,
13737c478bd9Sstevel@tonic-gate
1374a43ba736SRobert Mustacchi# From Chris Walton (2011-12-01)
1375a43ba736SRobert Mustacchi# In the first of Tammy Hardwick's articles
1376a43ba736SRobert Mustacchi# http://www.ilovecreston.com/?p=articles&t=spec&ar=260
1377a43ba736SRobert Mustacchi# she quotes the Friday November 1/1918 edition of the Creston Review.
1378a43ba736SRobert Mustacchi# The quote includes these two statements:
1379a43ba736SRobert Mustacchi# 'Sunday the CPR went back to the old system of time...'
1380a43ba736SRobert Mustacchi# '... The daylight saving scheme was dropped all over Canada at the same time,'
1381a43ba736SRobert Mustacchi# These statements refer to a transition from daylight time to standard time
1382a43ba736SRobert Mustacchi# that occurred nationally on Sunday October 27/1918.  This transition was
1383a43ba736SRobert Mustacchi# also documented in the Saturday October 26/1918 edition of the Toronto Star.
1384a43ba736SRobert Mustacchi
1385a43ba736SRobert Mustacchi# In light of that evidence, we alter the date from the earlier believed
1386a43ba736SRobert Mustacchi# Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day
1387a43ba736SRobert Mustacchi# than Thursday) in all Canadian rulesets.
1388a43ba736SRobert Mustacchi
1389f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
13907c478bd9Sstevel@tonic-gateRule	Canada	1918	only	-	Apr	14	2:00	1:00	D
1391a43ba736SRobert MustacchiRule	Canada	1918	only	-	Oct	27	2:00	0	S
13927c478bd9Sstevel@tonic-gateRule	Canada	1942	only	-	Feb	 9	2:00	1:00	W # War
13937c478bd9Sstevel@tonic-gateRule	Canada	1945	only	-	Aug	14	23:00u	1:00	P # Peace
13947c478bd9Sstevel@tonic-gateRule	Canada	1945	only	-	Sep	30	2:00	0	S
13957c478bd9Sstevel@tonic-gateRule	Canada	1974	1986	-	Apr	lastSun	2:00	1:00	D
1396f430f59aSrobbinRule	Canada	1974	2006	-	Oct	lastSun	2:00	0	S
1397f430f59aSrobbinRule	Canada	1987	2006	-	Apr	Sun>=1	2:00	1:00	D
1398f430f59aSrobbinRule	Canada	2007	max	-	Mar	Sun>=8	2:00	1:00	D
1399f430f59aSrobbinRule	Canada	2007	max	-	Nov	Sun>=1	2:00	0	S
14007c478bd9Sstevel@tonic-gate
14017c478bd9Sstevel@tonic-gate
14022f9aa4a7Srobbin# Newfoundland and Labrador
14037c478bd9Sstevel@tonic-gate
1404b654b02dSYuri Pankov# From Paul Eggert (2017-10-14):
1405b654b02dSYuri Pankov# Legally Labrador should observe Newfoundland time; see:
1406b654b02dSYuri Pankov# McLeod J. Labrador time - legal or not? St. John's Telegram, 2017-10-07
1407b654b02dSYuri Pankov# http://www.thetelegram.com/news/local/labrador-time--legal-or-not-154860/
1408b654b02dSYuri Pankov# Matthews and Vincent (1998) write that the only part of Labrador
1409b654b02dSYuri Pankov# that follows the rules is the southeast corner, including Port Hope
1410b654b02dSYuri Pankov# Simpson and Mary's Harbour, but excluding, say, Black Tickle.
14117c478bd9Sstevel@tonic-gate
1412f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
14137c478bd9Sstevel@tonic-gateRule	StJohns	1917	only	-	Apr	 8	2:00	1:00	D
14147c478bd9Sstevel@tonic-gateRule	StJohns	1917	only	-	Sep	17	2:00	0	S
14152f9aa4a7Srobbin# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger.
14167c478bd9Sstevel@tonic-gateRule	StJohns	1919	only	-	May	 5	23:00	1:00	D
14177c478bd9Sstevel@tonic-gateRule	StJohns	1919	only	-	Aug	12	23:00	0	S
14182f9aa4a7Srobbin# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger.
14197c478bd9Sstevel@tonic-gateRule	StJohns	1920	1935	-	May	Sun>=1	23:00	1:00	D
14207c478bd9Sstevel@tonic-gateRule	StJohns	1920	1935	-	Oct	lastSun	23:00	0	S
14212f9aa4a7Srobbin# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks &
14222f9aa4a7Srobbin# Pottenger.
14237c478bd9Sstevel@tonic-gateRule	StJohns	1936	1941	-	May	Mon>=9	0:00	1:00	D
14247c478bd9Sstevel@tonic-gateRule	StJohns	1936	1941	-	Oct	Mon>=2	0:00	0	S
14257c478bd9Sstevel@tonic-gate# Whitman gives the following transitions:
14267c478bd9Sstevel@tonic-gate# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07
14272f9aa4a7Srobbin# but go with Shanks & Pottenger and assume they used Canadian rules.
14287c478bd9Sstevel@tonic-gate# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives
14292f9aa4a7Srobbin# Apr 30 - Sep 24; go with Shanks & Pottenger.
14307c478bd9Sstevel@tonic-gateRule	StJohns	1946	1950	-	May	Sun>=8	2:00	1:00	D
14317c478bd9Sstevel@tonic-gateRule	StJohns	1946	1950	-	Oct	Sun>=2	2:00	0	S
14327c478bd9Sstevel@tonic-gateRule	StJohns	1951	1986	-	Apr	lastSun	2:00	1:00	D
14337c478bd9Sstevel@tonic-gateRule	StJohns	1951	1959	-	Sep	lastSun	2:00	0	S
14347c478bd9Sstevel@tonic-gateRule	StJohns	1960	1986	-	Oct	lastSun	2:00	0	S
14357c478bd9Sstevel@tonic-gate# From Paul Eggert (2000-10-02):
14367c478bd9Sstevel@tonic-gate# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches
14377c478bd9Sstevel@tonic-gate# at 00:01 local time.  For now, assume it started in 1987.
1438abaa65c8SYuri Pankov
1439abaa65c8SYuri Pankov# From Michael Pelley (2011-09-12):
1440abaa65c8SYuri Pankov# We received today, Monday, September 12, 2011, notification that the
1441abaa65c8SYuri Pankov# changes to the Newfoundland Standard Time Act have been proclaimed.
1442abaa65c8SYuri Pankov# The change in the Act stipulates that the change from Daylight Savings
1443abaa65c8SYuri Pankov# Time to Standard Time and from Standard Time to Daylight Savings Time
1444abaa65c8SYuri Pankov# now occurs at 2:00AM.
1445abaa65c8SYuri Pankov# ...
1446abaa65c8SYuri Pankov# http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm
1447abaa65c8SYuri Pankov# ...
1448abaa65c8SYuri Pankov# MICHAEL PELLEY  |  Manager of Enterprise Architecture - Solution Delivery
1449abaa65c8SYuri Pankov# Office of the Chief Information Officer
1450abaa65c8SYuri Pankov# Executive Council
1451abaa65c8SYuri Pankov# Government of Newfoundland & Labrador
1452abaa65c8SYuri Pankov
14537c478bd9Sstevel@tonic-gateRule	StJohns	1987	only	-	Apr	Sun>=1	0:01	1:00	D
14542f9aa4a7SrobbinRule	StJohns	1987	2006	-	Oct	lastSun	0:01	0	S
14557c478bd9Sstevel@tonic-gateRule	StJohns	1988	only	-	Apr	Sun>=1	0:01	2:00	DD
14562f9aa4a7SrobbinRule	StJohns	1989	2006	-	Apr	Sun>=1	0:01	1:00	D
1457abaa65c8SYuri PankovRule	StJohns	2007	2011	-	Mar	Sun>=8	0:01	1:00	D
1458abaa65c8SYuri PankovRule	StJohns	2007	2010	-	Nov	Sun>=1	0:01	0	S
14592f9aa4a7Srobbin#
1460b4eb54e1SRobert Mustacchi# St John's has an apostrophe, but POSIX file names can't have apostrophes.
1461374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
14627c478bd9Sstevel@tonic-gateZone America/St_Johns	-3:30:52 -	LMT	1884
14637c478bd9Sstevel@tonic-gate			-3:30:52 StJohns N%sT	1918
14647c478bd9Sstevel@tonic-gate			-3:30:52 Canada	N%sT	1919
14657c478bd9Sstevel@tonic-gate			-3:30:52 StJohns N%sT	1935 Mar 30
14667c478bd9Sstevel@tonic-gate			-3:30	StJohns	N%sT	1942 May 11
14677c478bd9Sstevel@tonic-gate			-3:30	Canada	N%sT	1946
1468abaa65c8SYuri Pankov			-3:30	StJohns	N%sT	2011 Nov
1469abaa65c8SYuri Pankov			-3:30	Canada	N%sT
14707c478bd9Sstevel@tonic-gate
14717c478bd9Sstevel@tonic-gate# most of east Labrador
14727c478bd9Sstevel@tonic-gate
1473a43ba736SRobert Mustacchi# The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'.
1474374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
14757c478bd9Sstevel@tonic-gateZone America/Goose_Bay	-4:01:40 -	LMT	1884 # Happy Valley-Goose Bay
14767c478bd9Sstevel@tonic-gate			-3:30:52 -	NST	1918
14777c478bd9Sstevel@tonic-gate			-3:30:52 Canada N%sT	1919
14787c478bd9Sstevel@tonic-gate			-3:30:52 -	NST	1935 Mar 30
14797c478bd9Sstevel@tonic-gate			-3:30	-	NST	1936
14807c478bd9Sstevel@tonic-gate			-3:30	StJohns	N%sT	1942 May 11
14817c478bd9Sstevel@tonic-gate			-3:30	Canada	N%sT	1946
14826f8e8937SDan McDonald			-3:30	StJohns	N%sT	1966 Mar 15  2:00
1483abaa65c8SYuri Pankov			-4:00	StJohns	A%sT	2011 Nov
1484abaa65c8SYuri Pankov			-4:00	Canada	A%sT
14857c478bd9Sstevel@tonic-gate
14867c478bd9Sstevel@tonic-gate
14875254d4faSAndy Fiddaman# west Labrador, Nova Scotia, Prince Edward I,
14885254d4faSAndy Fiddaman# Îles-de-la-Madeleine, Listuguj reserve
14897c478bd9Sstevel@tonic-gate
149056b82ca8SDan McDonald# From Brian Inglis (2015-07-20):
149156b82ca8SDan McDonald# From the historical weather station records available at:
149256b82ca8SDan McDonald# https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada
149356b82ca8SDan McDonald# Sydney shares the same time history as Glace Bay, so was
149456b82ca8SDan McDonald# likely to be the same across the island....
149556b82ca8SDan McDonald# Sydney, as the capital and most populous location, or Cape Breton, would
149656b82ca8SDan McDonald# have been better names for the zone had we known this in 1996.
149756b82ca8SDan McDonald
149856b82ca8SDan McDonald# From Paul Eggert (2015-07-20):
14992f9aa4a7Srobbin# Shanks & Pottenger write that since 1970 most of this region has been like
15002f9aa4a7Srobbin# Halifax.  Many locales did not observe peacetime DST until 1972;
150156b82ca8SDan McDonald# the Cape Breton area, represented by Glace Bay, is the largest we know of
150256b82ca8SDan McDonald# (Glace Bay was perhaps not the best name choice but no point changing now).
15032f9aa4a7Srobbin# Shanks & Pottenger also write that Liverpool, NS was the only town
15042f9aa4a7Srobbin# in Canada to observe DST in 1971 but not 1970; for now we'll assume
15052f9aa4a7Srobbin# this is a typo.
15067c478bd9Sstevel@tonic-gate
15075254d4faSAndy Fiddaman# From Jeffery Nichols (2020-01-09):
15085254d4faSAndy Fiddaman# America/Halifax ... also applies to Îles-de-la-Madeleine and the Listuguj
15095254d4faSAndy Fiddaman# reserve in Quebec. Officially, this came into effect on January 1, 2007
15105254d4faSAndy Fiddaman# (Legal Time Act, CQLR c T-5.1), but the legislative debates surrounding that
15115254d4faSAndy Fiddaman# bill say that it is "accommodating the customs and practices" of those
15125254d4faSAndy Fiddaman# regions, which suggests that they have always been in-line with Halifax.
15135254d4faSAndy Fiddaman
1514f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
1515f430f59aSrobbinRule	Halifax	1916	only	-	Apr	 1	0:00	1:00	D
1516f430f59aSrobbinRule	Halifax	1916	only	-	Oct	 1	0:00	0	S
1517f430f59aSrobbinRule	Halifax	1920	only	-	May	 9	0:00	1:00	D
1518f430f59aSrobbinRule	Halifax	1920	only	-	Aug	29	0:00	0	S
1519f430f59aSrobbinRule	Halifax	1921	only	-	May	 6	0:00	1:00	D
1520f430f59aSrobbinRule	Halifax	1921	1922	-	Sep	 5	0:00	0	S
1521f430f59aSrobbinRule	Halifax	1922	only	-	Apr	30	0:00	1:00	D
1522f430f59aSrobbinRule	Halifax	1923	1925	-	May	Sun>=1	0:00	1:00	D
1523f430f59aSrobbinRule	Halifax	1923	only	-	Sep	 4	0:00	0	S
1524f430f59aSrobbinRule	Halifax	1924	only	-	Sep	15	0:00	0	S
1525f430f59aSrobbinRule	Halifax	1925	only	-	Sep	28	0:00	0	S
1526f430f59aSrobbinRule	Halifax	1926	only	-	May	16	0:00	1:00	D
1527f430f59aSrobbinRule	Halifax	1926	only	-	Sep	13	0:00	0	S
1528f430f59aSrobbinRule	Halifax	1927	only	-	May	 1	0:00	1:00	D
1529f430f59aSrobbinRule	Halifax	1927	only	-	Sep	26	0:00	0	S
1530f430f59aSrobbinRule	Halifax	1928	1931	-	May	Sun>=8	0:00	1:00	D
1531f430f59aSrobbinRule	Halifax	1928	only	-	Sep	 9	0:00	0	S
1532f430f59aSrobbinRule	Halifax	1929	only	-	Sep	 3	0:00	0	S
1533f430f59aSrobbinRule	Halifax	1930	only	-	Sep	15	0:00	0	S
1534f430f59aSrobbinRule	Halifax	1931	1932	-	Sep	Mon>=24	0:00	0	S
1535f430f59aSrobbinRule	Halifax	1932	only	-	May	 1	0:00	1:00	D
1536f430f59aSrobbinRule	Halifax	1933	only	-	Apr	30	0:00	1:00	D
1537f430f59aSrobbinRule	Halifax	1933	only	-	Oct	 2	0:00	0	S
1538f430f59aSrobbinRule	Halifax	1934	only	-	May	20	0:00	1:00	D
1539f430f59aSrobbinRule	Halifax	1934	only	-	Sep	16	0:00	0	S
1540f430f59aSrobbinRule	Halifax	1935	only	-	Jun	 2	0:00	1:00	D
1541f430f59aSrobbinRule	Halifax	1935	only	-	Sep	30	0:00	0	S
1542f430f59aSrobbinRule	Halifax	1936	only	-	Jun	 1	0:00	1:00	D
1543f430f59aSrobbinRule	Halifax	1936	only	-	Sep	14	0:00	0	S
1544f430f59aSrobbinRule	Halifax	1937	1938	-	May	Sun>=1	0:00	1:00	D
1545f430f59aSrobbinRule	Halifax	1937	1941	-	Sep	Mon>=24	0:00	0	S
1546f430f59aSrobbinRule	Halifax	1939	only	-	May	28	0:00	1:00	D
1547f430f59aSrobbinRule	Halifax	1940	1941	-	May	Sun>=1	0:00	1:00	D
1548f430f59aSrobbinRule	Halifax	1946	1949	-	Apr	lastSun	2:00	1:00	D
1549f430f59aSrobbinRule	Halifax	1946	1949	-	Sep	lastSun	2:00	0	S
1550f430f59aSrobbinRule	Halifax	1951	1954	-	Apr	lastSun	2:00	1:00	D
1551f430f59aSrobbinRule	Halifax	1951	1954	-	Sep	lastSun	2:00	0	S
1552f430f59aSrobbinRule	Halifax	1956	1959	-	Apr	lastSun	2:00	1:00	D
1553f430f59aSrobbinRule	Halifax	1956	1959	-	Sep	lastSun	2:00	0	S
1554f430f59aSrobbinRule	Halifax	1962	1973	-	Apr	lastSun	2:00	1:00	D
1555f430f59aSrobbinRule	Halifax	1962	1973	-	Oct	lastSun	2:00	0	S
1556374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
15577c478bd9Sstevel@tonic-gateZone America/Halifax	-4:14:24 -	LMT	1902 Jun 15
15587c478bd9Sstevel@tonic-gate			-4:00	Halifax	A%sT	1918
15597c478bd9Sstevel@tonic-gate			-4:00	Canada	A%sT	1919
15606f8e8937SDan McDonald			-4:00	Halifax	A%sT	1942 Feb  9  2:00s
15617c478bd9Sstevel@tonic-gate			-4:00	Canada	A%sT	1946
15627c478bd9Sstevel@tonic-gate			-4:00	Halifax	A%sT	1974
15637c478bd9Sstevel@tonic-gate			-4:00	Canada	A%sT
15647c478bd9Sstevel@tonic-gateZone America/Glace_Bay	-3:59:48 -	LMT	1902 Jun 15
15657c478bd9Sstevel@tonic-gate			-4:00	Canada	A%sT	1953
15667c478bd9Sstevel@tonic-gate			-4:00	Halifax	A%sT	1954
15677c478bd9Sstevel@tonic-gate			-4:00	-	AST	1972
15687c478bd9Sstevel@tonic-gate			-4:00	Halifax	A%sT	1974
15697c478bd9Sstevel@tonic-gate			-4:00	Canada	A%sT
15707c478bd9Sstevel@tonic-gate
1571f430f59aSrobbin# New Brunswick
1572f430f59aSrobbin
1573a68d064cSrobbin# From Paul Eggert (2007-01-31):
1574a68d064cSrobbin# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf>
1575a68d064cSrobbin# says they changed at 00:01 through 2006, and
1576f430f59aSrobbin# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it
1577a68d064cSrobbin# clear that this was the case since at least 1993.
15782f9aa4a7Srobbin# For now, assume it started in 1993.
1579f430f59aSrobbin
1580f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
1581f430f59aSrobbinRule	Moncton	1933	1935	-	Jun	Sun>=8	1:00	1:00	D
1582f430f59aSrobbinRule	Moncton	1933	1935	-	Sep	Sun>=8	1:00	0	S
1583f430f59aSrobbinRule	Moncton	1936	1938	-	Jun	Sun>=1	1:00	1:00	D
1584f430f59aSrobbinRule	Moncton	1936	1938	-	Sep	Sun>=1	1:00	0	S
1585f430f59aSrobbinRule	Moncton	1939	only	-	May	27	1:00	1:00	D
1586f430f59aSrobbinRule	Moncton	1939	1941	-	Sep	Sat>=21	1:00	0	S
1587f430f59aSrobbinRule	Moncton	1940	only	-	May	19	1:00	1:00	D
1588f430f59aSrobbinRule	Moncton	1941	only	-	May	 4	1:00	1:00	D
1589f430f59aSrobbinRule	Moncton	1946	1972	-	Apr	lastSun	2:00	1:00	D
1590f430f59aSrobbinRule	Moncton	1946	1956	-	Sep	lastSun	2:00	0	S
15912f9aa4a7SrobbinRule	Moncton	1957	1972	-	Oct	lastSun	2:00	0	S
1592f430f59aSrobbinRule	Moncton	1993	2006	-	Apr	Sun>=1	0:01	1:00	D
1593f430f59aSrobbinRule	Moncton	1993	2006	-	Oct	lastSun	0:01	0	S
1594374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
1595f430f59aSrobbinZone America/Moncton	-4:19:08 -	LMT	1883 Dec  9
1596f430f59aSrobbin			-5:00	-	EST	1902 Jun 15
1597f430f59aSrobbin			-4:00	Canada	A%sT	1933
1598f430f59aSrobbin			-4:00	Moncton	A%sT	1942
1599f430f59aSrobbin			-4:00	Canada	A%sT	1946
1600f430f59aSrobbin			-4:00	Moncton	A%sT	1973
1601f430f59aSrobbin			-4:00	Canada	A%sT	1993
16022f9aa4a7Srobbin			-4:00	Moncton	A%sT	2007
16032f9aa4a7Srobbin			-4:00	Canada	A%sT
16047c478bd9Sstevel@tonic-gate
16052f9aa4a7Srobbin# Quebec
16062f9aa4a7Srobbin
16075254d4faSAndy Fiddaman# From Paul Eggert (2020-01-10):
160856b82ca8SDan McDonald# See America/Toronto for most of Quebec, including Montreal.
16095254d4faSAndy Fiddaman# See America/Halifax for the Îles de la Madeleine and the Listuguj reserve.
161006965442SAndy Fiddaman# See America/Puerto_Rico for east of Natashquan.
16112f9aa4a7Srobbin
16122f9aa4a7Srobbin# Ontario
16132f9aa4a7Srobbin
16147c478bd9Sstevel@tonic-gate# From Mark Brader (2003-07-26):
16157c478bd9Sstevel@tonic-gate# [According to the Toronto Star] Orillia, Ontario, adopted DST
16167c478bd9Sstevel@tonic-gate# effective Saturday, 1912-06-22, 22:00; the article mentions that
16177c478bd9Sstevel@tonic-gate# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw
16187c478bd9Sstevel@tonic-gate# have already done so.  In Orillia DST was to run until Saturday,
16197c478bd9Sstevel@tonic-gate# 1912-08-31 (no time mentioned), but it was met with considerable
16207c478bd9Sstevel@tonic-gate# hostility from certain segments of the public, and was revoked after
16216f8e8937SDan McDonald# only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but
16227c478bd9Sstevel@tonic-gate# presumably that should be -07-06.  (1912-06-19, -07-12; also letters
16237c478bd9Sstevel@tonic-gate# earlier in June).
16247c478bd9Sstevel@tonic-gate#
16257c478bd9Sstevel@tonic-gate# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21).
1626b654b02dSYuri Pankov#
1627b654b02dSYuri Pankov# From Paul Eggert (2017-07-08):
1628b654b02dSYuri Pankov# For more on Orillia, see: Daubs K. Bold attempt at daylight saving
1629b654b02dSYuri Pankov# time became a comic failure in Orillia. Toronto Star 2017-07-08.
1630b654b02dSYuri Pankov# https://www.thestar.com/news/insight/2017/07/08/bold-attempt-at-daylight-saving-time-became-a-comic-failure-in-orillia.html
16317c478bd9Sstevel@tonic-gate
163260799977SNobutomo Nakano# From Mark Brader (2010-03-06):
163360799977SNobutomo Nakano#
163460799977SNobutomo Nakano# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom
163560799977SNobutomo Nakano# right corner of page 1, it says that Toronto will return to standard
163660799977SNobutomo Nakano# time at 2 am Sunday morning (which agrees with the database), and that:
163760799977SNobutomo Nakano#
163860799977SNobutomo Nakano#     The one-hour setback will go into effect throughout most of Ontario,
163960799977SNobutomo Nakano#     except in areas like Windsor which remains on standard time all year.
164060799977SNobutomo Nakano#
1641f117aa50SRobert Mustacchi# ... I don't know if Windsor began observing DST when Detroit did,
1642f117aa50SRobert Mustacchi# or in 1974, or on some other date.
164360799977SNobutomo Nakano#
164460799977SNobutomo Nakano# By the way, the article continues by noting that:
164560799977SNobutomo Nakano#
164660799977SNobutomo Nakano#     Some cities in the United States have pushed the deadline back
164760799977SNobutomo Nakano#     three weeks and will change over from daylight saving in October.
164860799977SNobutomo Nakano
1649*e15592c8SRobert Mustacchi# From Chris Walton (2024-01-09):
1650*e15592c8SRobert Mustacchi# The [Toronto] changes in 1947, 1948, and 1949 took place at 2:00 a.m. local
1651*e15592c8SRobert Mustacchi# time instead of midnight....  Toronto Daily Star - ...
1652*e15592c8SRobert Mustacchi# April 2, 1947 - Page 39 ... April 7, 1948 - Page 13 ...
1653*e15592c8SRobert Mustacchi# April 2, 1949 - Page 1 ... April 7, 1949 - Page 24 ...
1654*e15592c8SRobert Mustacchi# November 25, 1949 - Page 52 ... April 21, 1950 - Page 14 ...
1655*e15592c8SRobert Mustacchi# September 19, 1950 - Page 46 ... September 20, 1950 - Page 3 ...
1656*e15592c8SRobert Mustacchi# November 24, 1950 - Page 21
1657*e15592c8SRobert Mustacchi
165860799977SNobutomo Nakano# From Arthur David Olson (2010-07-17):
165960799977SNobutomo Nakano#
166060799977SNobutomo Nakano# "Standard Time and Time Zones in Canada" appeared in
166160799977SNobutomo Nakano# The Journal of The Royal Astronomical Society of Canada,
166260799977SNobutomo Nakano# volume 26, number 2 (February 1932) and, as of 2010-07-17,
166360799977SNobutomo Nakano# was available at
166460799977SNobutomo Nakano# http://adsabs.harvard.edu/full/1932JRASC..26...49S
166560799977SNobutomo Nakano#
166660799977SNobutomo Nakano# It includes the text below (starting on page 57):
166760799977SNobutomo Nakano#
166860799977SNobutomo Nakano#   A list of the places in Canada using daylight saving time would
166960799977SNobutomo Nakano# require yearly revision. From information kindly furnished by
167060799977SNobutomo Nakano# the provincial governments and by the postmasters in many cities
167160799977SNobutomo Nakano# and towns, it is found that the following places used daylight sav-
167260799977SNobutomo Nakano# ing in 1930. The information for the province of Quebec is definite,
167360799977SNobutomo Nakano# for the other provinces only approximate:
167460799977SNobutomo Nakano#
16756f8e8937SDan McDonald#	Province	Daylight saving time used
167660799977SNobutomo Nakano# Prince Edward Island	Not used.
167760799977SNobutomo Nakano# Nova Scotia		In Halifax only.
167860799977SNobutomo Nakano# New Brunswick		In St. John only.
167960799977SNobutomo Nakano# Quebec		In the following places:
16806f8e8937SDan McDonald#			Montreal	Lachine
16816f8e8937SDan McDonald#			Quebec		Mont-Royal
16826f8e8937SDan McDonald#			Lévis		Iberville
16836f8e8937SDan McDonald#			St. Lambert	Cap de la Madelèine
16846f8e8937SDan McDonald#			Verdun		Loretteville
16856f8e8937SDan McDonald#			Westmount	Richmond
16866f8e8937SDan McDonald#			Outremont	St. Jérôme
16876f8e8937SDan McDonald#			Longueuil	Greenfield Park
16886f8e8937SDan McDonald#			Arvida		Waterloo
16896f8e8937SDan McDonald#			Chambly-Canton	Beaulieu
16906f8e8937SDan McDonald#			Melbourne	La Tuque
16916f8e8937SDan McDonald#			St. Théophile	Buckingham
169260799977SNobutomo Nakano# Ontario		Used generally in the cities and towns along
16936f8e8937SDan McDonald#			the southerly part of the province. Not
16946f8e8937SDan McDonald#			used in the northwesterly part.
169560799977SNobutomo Nakano# Manitoba		Not used.
169660799977SNobutomo Nakano# Saskatchewan		In Regina only.
169760799977SNobutomo Nakano# Alberta		Not used.
169860799977SNobutomo Nakano# British Columbia	Not used.
169960799977SNobutomo Nakano#
170060799977SNobutomo Nakano#   With some exceptions, the use of daylight saving may be said to be limited
170160799977SNobutomo Nakano# to those cities and towns lying between Quebec city and Windsor, Ont.
170260799977SNobutomo Nakano
1703f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
17047c478bd9Sstevel@tonic-gateRule	Toronto	1919	only	-	Mar	30	23:30	1:00	D
17057c478bd9Sstevel@tonic-gateRule	Toronto	1919	only	-	Oct	26	0:00	0	S
17067c478bd9Sstevel@tonic-gateRule	Toronto	1920	only	-	May	 2	2:00	1:00	D
17077c478bd9Sstevel@tonic-gateRule	Toronto	1920	only	-	Sep	26	0:00	0	S
17087c478bd9Sstevel@tonic-gateRule	Toronto	1921	only	-	May	15	2:00	1:00	D
17097c478bd9Sstevel@tonic-gateRule	Toronto	1921	only	-	Sep	15	2:00	0	S
17107c478bd9Sstevel@tonic-gateRule	Toronto	1922	1923	-	May	Sun>=8	2:00	1:00	D
17112f9aa4a7Srobbin# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16"
17122f9aa4a7Srobbin# was meant.
17137c478bd9Sstevel@tonic-gateRule	Toronto	1922	1926	-	Sep	Sun>=15	2:00	0	S
17147c478bd9Sstevel@tonic-gateRule	Toronto	1924	1927	-	May	Sun>=1	2:00	1:00	D
1715374df668SAndy FiddamanRule	Toronto	1927	1937	-	Sep	Sun>=25	2:00	0	S
1716374df668SAndy FiddamanRule	Toronto	1928	1937	-	Apr	Sun>=25	2:00	1:00	D
1717374df668SAndy FiddamanRule	Toronto	1938	1940	-	Apr	lastSun	2:00	1:00	D
1718374df668SAndy FiddamanRule	Toronto	1938	1939	-	Sep	lastSun	2:00	0	S
1719*e15592c8SRobert MustacchiRule	Toronto	1945	1948	-	Sep	lastSun	2:00	0	S
1720*e15592c8SRobert MustacchiRule	Toronto	1946	1973	-	Apr	lastSun	2:00	1:00	D
1721*e15592c8SRobert MustacchiRule	Toronto	1949	1950	-	Nov	lastSun	2:00	0	S
17227c478bd9Sstevel@tonic-gateRule	Toronto	1951	1956	-	Sep	lastSun	2:00	0	S
17232f9aa4a7Srobbin# Shanks & Pottenger say Toronto ended DST a week early in 1971,
17242f9aa4a7Srobbin# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this
17252f9aa4a7Srobbin# is wrong, and that he had confirmed it by checking the 1971-10-30
17262f9aa4a7Srobbin# Toronto Star, which said that DST was ending 1971-10-31 as usual.
17277c478bd9Sstevel@tonic-gateRule	Toronto	1957	1973	-	Oct	lastSun	2:00	0	S
17287c478bd9Sstevel@tonic-gate
1729f117aa50SRobert Mustacchi# The Bahamas match Toronto since 1970.
17307c478bd9Sstevel@tonic-gate
1731374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
17327c478bd9Sstevel@tonic-gateZone America/Toronto	-5:17:32 -	LMT	1895
17337c478bd9Sstevel@tonic-gate			-5:00	Canada	E%sT	1919
17346f8e8937SDan McDonald			-5:00	Toronto	E%sT	1942 Feb  9  2:00s
17357c478bd9Sstevel@tonic-gate			-5:00	Canada	E%sT	1946
17367c478bd9Sstevel@tonic-gate			-5:00	Toronto	E%sT	1974
17377c478bd9Sstevel@tonic-gate			-5:00	Canada	E%sT
173806965442SAndy Fiddaman# For Atikokan see America/Panama.
17397c478bd9Sstevel@tonic-gate
17407c478bd9Sstevel@tonic-gate
17417c478bd9Sstevel@tonic-gate# Manitoba
17427c478bd9Sstevel@tonic-gate
17432f9aa4a7Srobbin# From Rob Douglas (2006-04-06):
17442f9aa4a7Srobbin# the old Manitoba Time Act - as amended by Bill 2, assented to
17452f9aa4a7Srobbin# March 27, 1987 ... said ...
17462f9aa4a7Srobbin# "between two o'clock Central Standard Time in the morning of
17472f9aa4a7Srobbin# the first Sunday of April of each year and two o'clock Central
17482f9aa4a7Srobbin# Standard Time in the morning of the last Sunday of October next
17492f9aa4a7Srobbin# following, one hour in advance of Central Standard Time."...
17506f8e8937SDan McDonald# I believe that the English legislation [of the old time act] had
17512f9aa4a7Srobbin# been assented to (March 22, 1967)....
17522f9aa4a7Srobbin# Also, as far as I can tell, there was no order-in-council varying
17532f9aa4a7Srobbin# the time of Daylight Saving Time for 2005 and so the provisions of
17542f9aa4a7Srobbin# the 1987 version would apply - the changeover was at 2:00 Central
17552f9aa4a7Srobbin# Standard Time (i.e. not until 3:00 Central Daylight Time).
17562f9aa4a7Srobbin
17572f9aa4a7Srobbin# From Paul Eggert (2006-04-10):
17582f9aa4a7Srobbin# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s)
17592f9aa4a7Srobbin# starting 1966.  Since 02:00s is clearly correct for 1967 on, assume
17602f9aa4a7Srobbin# it was also 02:00s in 1966.
17612f9aa4a7Srobbin
1762f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
17637c478bd9Sstevel@tonic-gateRule	Winn	1916	only	-	Apr	23	0:00	1:00	D
17647c478bd9Sstevel@tonic-gateRule	Winn	1916	only	-	Sep	17	0:00	0	S
17657c478bd9Sstevel@tonic-gateRule	Winn	1918	only	-	Apr	14	2:00	1:00	D
1766a43ba736SRobert MustacchiRule	Winn	1918	only	-	Oct	27	2:00	0	S
17677c478bd9Sstevel@tonic-gateRule	Winn	1937	only	-	May	16	2:00	1:00	D
17687c478bd9Sstevel@tonic-gateRule	Winn	1937	only	-	Sep	26	2:00	0	S
17697c478bd9Sstevel@tonic-gateRule	Winn	1942	only	-	Feb	 9	2:00	1:00	W # War
17707c478bd9Sstevel@tonic-gateRule	Winn	1945	only	-	Aug	14	23:00u	1:00	P # Peace
17717c478bd9Sstevel@tonic-gateRule	Winn	1945	only	-	Sep	lastSun	2:00	0	S
17727c478bd9Sstevel@tonic-gateRule	Winn	1946	only	-	May	12	2:00	1:00	D
17737c478bd9Sstevel@tonic-gateRule	Winn	1946	only	-	Oct	13	2:00	0	S
17747c478bd9Sstevel@tonic-gateRule	Winn	1947	1949	-	Apr	lastSun	2:00	1:00	D
17757c478bd9Sstevel@tonic-gateRule	Winn	1947	1949	-	Sep	lastSun	2:00	0	S
17767c478bd9Sstevel@tonic-gateRule	Winn	1950	only	-	May	 1	2:00	1:00	D
17777c478bd9Sstevel@tonic-gateRule	Winn	1950	only	-	Sep	30	2:00	0	S
17787c478bd9Sstevel@tonic-gateRule	Winn	1951	1960	-	Apr	lastSun	2:00	1:00	D
17797c478bd9Sstevel@tonic-gateRule	Winn	1951	1958	-	Sep	lastSun	2:00	0	S
17807c478bd9Sstevel@tonic-gateRule	Winn	1959	only	-	Oct	lastSun	2:00	0	S
17817c478bd9Sstevel@tonic-gateRule	Winn	1960	only	-	Sep	lastSun	2:00	0	S
17827c478bd9Sstevel@tonic-gateRule	Winn	1963	only	-	Apr	lastSun	2:00	1:00	D
17837c478bd9Sstevel@tonic-gateRule	Winn	1963	only	-	Sep	22	2:00	0	S
17842f9aa4a7SrobbinRule	Winn	1966	1986	-	Apr	lastSun	2:00s	1:00	D
17852f9aa4a7SrobbinRule	Winn	1966	2005	-	Oct	lastSun	2:00s	0	S
17862f9aa4a7SrobbinRule	Winn	1987	2005	-	Apr	Sun>=1	2:00s	1:00	D
1787374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
17887c478bd9Sstevel@tonic-gateZone America/Winnipeg	-6:28:36 -	LMT	1887 Jul 16
17892f9aa4a7Srobbin			-6:00	Winn	C%sT	2006
17902f9aa4a7Srobbin			-6:00	Canada	C%sT
17917c478bd9Sstevel@tonic-gate
17927c478bd9Sstevel@tonic-gate
17937c478bd9Sstevel@tonic-gate# Saskatchewan
17947c478bd9Sstevel@tonic-gate
17957c478bd9Sstevel@tonic-gate# From Mark Brader (2003-07-26):
17967c478bd9Sstevel@tonic-gate# The first actual adoption of DST in Canada was at the municipal
17977c478bd9Sstevel@tonic-gate# level.  As the [Toronto] Star put it (1912-06-07), "While people
17987c478bd9Sstevel@tonic-gate# elsewhere have long been talking of legislation to save daylight,
17997c478bd9Sstevel@tonic-gate# the city of Moose Jaw [Saskatchewan] has acted on its own hook."
18007c478bd9Sstevel@tonic-gate# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned:
18017c478bd9Sstevel@tonic-gate# presumably late evening, as below), and would run until "the end of
18027c478bd9Sstevel@tonic-gate# the summer".  The discrepancy between municipal time and railroad
18037c478bd9Sstevel@tonic-gate# time was noted.
18047c478bd9Sstevel@tonic-gate
18057c478bd9Sstevel@tonic-gate# From Paul Eggert (2003-07-27):
18067c478bd9Sstevel@tonic-gate# Willett (1914-03) notes that DST "has been in operation ... in the
18077c478bd9Sstevel@tonic-gate# City of Moose Jaw, Saskatchewan, for one year."
18087c478bd9Sstevel@tonic-gate
1809374df668SAndy Fiddaman# From Paul Eggert (2019-07-25):
1810374df668SAndy Fiddaman# Pearce's book says Regina observed DST in 1914-1917.  No dates and times,
1811374df668SAndy Fiddaman# unfortunately.  It also says that in 1914 Saskatoon observed DST
1812374df668SAndy Fiddaman# from 1 June to 6 July, and that DST was also tried out in Davidson,
1813374df668SAndy Fiddaman# Melfort, and Prince Albert.
1814374df668SAndy Fiddaman
18152f9aa4a7Srobbin# From Paul Eggert (2006-03-22):
18162f9aa4a7Srobbin# Shanks & Pottenger say that since 1970 this region has mostly been as Regina.
18177c478bd9Sstevel@tonic-gate# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972.
18187c478bd9Sstevel@tonic-gate# Other western towns (e.g. Lloydminster) are like Edmonton.
18197c478bd9Sstevel@tonic-gate# Matthews and Vincent (1998) write that Denare Beach and Creighton
18207c478bd9Sstevel@tonic-gate# are like Winnipeg, in violation of Saskatchewan law.
18217c478bd9Sstevel@tonic-gate
182280868c53Srobbin# From W. Jones (1992-11-06):
18237c478bd9Sstevel@tonic-gate# The. . .below is based on information I got from our law library, the
18247c478bd9Sstevel@tonic-gate# provincial archives, and the provincial Community Services department.
18257c478bd9Sstevel@tonic-gate# A precise history would require digging through newspaper archives, and
18267c478bd9Sstevel@tonic-gate# since you didn't say what you wanted, I didn't bother.
18277c478bd9Sstevel@tonic-gate#
18287c478bd9Sstevel@tonic-gate# Saskatchewan is split by a time zone meridian (105W) and over the years
18297c478bd9Sstevel@tonic-gate# the boundary became pretty ragged as communities near it reevaluated
18307c478bd9Sstevel@tonic-gate# their affiliations in one direction or the other.  In 1965 a provincial
18317c478bd9Sstevel@tonic-gate# referendum favoured legislating common time practices.
18327c478bd9Sstevel@tonic-gate#
18337c478bd9Sstevel@tonic-gate# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of
18347c478bd9Sstevel@tonic-gate# Saskatchewan 1978) was proclaimed, and established that the eastern
18357c478bd9Sstevel@tonic-gate# part of Saskatchewan would use CST year round, that districts in
18367c478bd9Sstevel@tonic-gate# northwest Saskatchewan would by default follow CST but could opt to
18377c478bd9Sstevel@tonic-gate# follow Mountain Time rules (thus 1 hour difference in the winter and
18387c478bd9Sstevel@tonic-gate# zero in the summer), and that districts in southwest Saskatchewan would
18397c478bd9Sstevel@tonic-gate# by default follow MT but could opt to follow CST.
18407c478bd9Sstevel@tonic-gate#
18417c478bd9Sstevel@tonic-gate# It took a few years for the dust to settle (I know one story of a town
18427c478bd9Sstevel@tonic-gate# on one time zone having its school in another, such that a mom had to
18437c478bd9Sstevel@tonic-gate# serve her family lunch in two shifts), but presently it seems that only
18447c478bd9Sstevel@tonic-gate# a few towns on the border with Alberta (e.g. Lloydminster) follow MT
18457c478bd9Sstevel@tonic-gate# rules any more; all other districts appear to have used CST year round
18467c478bd9Sstevel@tonic-gate# since sometime in the 1960s.
18477c478bd9Sstevel@tonic-gate
18482f9aa4a7Srobbin# From Chris Walton (2006-06-26):
18492f9aa4a7Srobbin# The Saskatchewan time act which was last updated in 1996 is about 30 pages
18502f9aa4a7Srobbin# long and rather painful to read.
18512f9aa4a7Srobbin# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf
18522f9aa4a7Srobbin
1853f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
18547c478bd9Sstevel@tonic-gateRule	Regina	1918	only	-	Apr	14	2:00	1:00	D
1855a43ba736SRobert MustacchiRule	Regina	1918	only	-	Oct	27	2:00	0	S
18567c478bd9Sstevel@tonic-gateRule	Regina	1930	1934	-	May	Sun>=1	0:00	1:00	D
18577c478bd9Sstevel@tonic-gateRule	Regina	1930	1934	-	Oct	Sun>=1	0:00	0	S
18587c478bd9Sstevel@tonic-gateRule	Regina	1937	1941	-	Apr	Sun>=8	0:00	1:00	D
18597c478bd9Sstevel@tonic-gateRule	Regina	1937	only	-	Oct	Sun>=8	0:00	0	S
18607c478bd9Sstevel@tonic-gateRule	Regina	1938	only	-	Oct	Sun>=1	0:00	0	S
18617c478bd9Sstevel@tonic-gateRule	Regina	1939	1941	-	Oct	Sun>=8	0:00	0	S
18627c478bd9Sstevel@tonic-gateRule	Regina	1942	only	-	Feb	 9	2:00	1:00	W # War
18637c478bd9Sstevel@tonic-gateRule	Regina	1945	only	-	Aug	14	23:00u	1:00	P # Peace
18647c478bd9Sstevel@tonic-gateRule	Regina	1945	only	-	Sep	lastSun	2:00	0	S
18657c478bd9Sstevel@tonic-gateRule	Regina	1946	only	-	Apr	Sun>=8	2:00	1:00	D
18667c478bd9Sstevel@tonic-gateRule	Regina	1946	only	-	Oct	Sun>=8	2:00	0	S
18677c478bd9Sstevel@tonic-gateRule	Regina	1947	1957	-	Apr	lastSun	2:00	1:00	D
18687c478bd9Sstevel@tonic-gateRule	Regina	1947	1957	-	Sep	lastSun	2:00	0	S
18697c478bd9Sstevel@tonic-gateRule	Regina	1959	only	-	Apr	lastSun	2:00	1:00	D
18707c478bd9Sstevel@tonic-gateRule	Regina	1959	only	-	Oct	lastSun	2:00	0	S
18717c478bd9Sstevel@tonic-gate#
18727c478bd9Sstevel@tonic-gateRule	Swift	1957	only	-	Apr	lastSun	2:00	1:00	D
18737c478bd9Sstevel@tonic-gateRule	Swift	1957	only	-	Oct	lastSun	2:00	0	S
18747c478bd9Sstevel@tonic-gateRule	Swift	1959	1961	-	Apr	lastSun	2:00	1:00	D
18757c478bd9Sstevel@tonic-gateRule	Swift	1959	only	-	Oct	lastSun	2:00	0	S
18767c478bd9Sstevel@tonic-gateRule	Swift	1960	1961	-	Sep	lastSun	2:00	0	S
1877374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
18787c478bd9Sstevel@tonic-gateZone America/Regina	-6:58:36 -	LMT	1905 Sep
18796f8e8937SDan McDonald			-7:00	Regina	M%sT	1960 Apr lastSun  2:00
18807c478bd9Sstevel@tonic-gate			-6:00	-	CST
18817c478bd9Sstevel@tonic-gateZone America/Swift_Current -7:11:20 -	LMT	1905 Sep
18826f8e8937SDan McDonald			-7:00	Canada	M%sT	1946 Apr lastSun  2:00
18837c478bd9Sstevel@tonic-gate			-7:00	Regina	M%sT	1950
18846f8e8937SDan McDonald			-7:00	Swift	M%sT	1972 Apr lastSun  2:00
18857c478bd9Sstevel@tonic-gate			-6:00	-	CST
18867c478bd9Sstevel@tonic-gate
18877c478bd9Sstevel@tonic-gate
18887c478bd9Sstevel@tonic-gate# Alberta
18897c478bd9Sstevel@tonic-gate
189006965442SAndy Fiddaman# From Alois Treindl (2019-07-19):
1891374df668SAndy Fiddaman# There was no DST in Alberta in 1967... Calgary Herald, 29 April 1967.
1892374df668SAndy Fiddaman# 1969, no DST, from Edmonton Journal 18 April 1969
1893374df668SAndy Fiddaman#
1894374df668SAndy Fiddaman# From Paul Eggert (2019-07-25):
1895374df668SAndy Fiddaman# Pearce's book says that Alberta's 1948 Daylight Saving Act required
1896374df668SAndy Fiddaman# Mountain Standard Time without DST, and that "anyone who broke that law
1897374df668SAndy Fiddaman# could be fined up to $25 and costs".  There seems to be no record of
1898374df668SAndy Fiddaman# anybody paying the fine.  The law was not changed until an August 1971
1899374df668SAndy Fiddaman# plebiscite reinstituted DST in 1972.  This story is also mentioned in:
1900374df668SAndy Fiddaman# Boyer JP. Forcing Choice: The Risky Reward of Referendums. Dundum. 2017.
1901374df668SAndy Fiddaman# ISBN 978-1459739123.
1902374df668SAndy Fiddaman
1903f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
19047c478bd9Sstevel@tonic-gateRule	Edm	1918	1919	-	Apr	Sun>=8	2:00	1:00	D
1905a43ba736SRobert MustacchiRule	Edm	1918	only	-	Oct	27	2:00	0	S
19067c478bd9Sstevel@tonic-gateRule	Edm	1919	only	-	May	27	2:00	0	S
19077c478bd9Sstevel@tonic-gateRule	Edm	1920	1923	-	Apr	lastSun	2:00	1:00	D
19087c478bd9Sstevel@tonic-gateRule	Edm	1920	only	-	Oct	lastSun	2:00	0	S
19097c478bd9Sstevel@tonic-gateRule	Edm	1921	1923	-	Sep	lastSun	2:00	0	S
19107c478bd9Sstevel@tonic-gateRule	Edm	1942	only	-	Feb	 9	2:00	1:00	W # War
19117c478bd9Sstevel@tonic-gateRule	Edm	1945	only	-	Aug	14	23:00u	1:00	P # Peace
19127c478bd9Sstevel@tonic-gateRule	Edm	1945	only	-	Sep	lastSun	2:00	0	S
19137c478bd9Sstevel@tonic-gateRule	Edm	1947	only	-	Apr	lastSun	2:00	1:00	D
19147c478bd9Sstevel@tonic-gateRule	Edm	1947	only	-	Sep	lastSun	2:00	0	S
19157c478bd9Sstevel@tonic-gateRule	Edm	1972	1986	-	Apr	lastSun	2:00	1:00	D
19162f9aa4a7SrobbinRule	Edm	1972	2006	-	Oct	lastSun	2:00	0	S
1917374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
19187c478bd9Sstevel@tonic-gateZone America/Edmonton	-7:33:52 -	LMT	1906 Sep
19192f9aa4a7Srobbin			-7:00	Edm	M%sT	1987
19202f9aa4a7Srobbin			-7:00	Canada	M%sT
19217c478bd9Sstevel@tonic-gate
19227c478bd9Sstevel@tonic-gate
19237c478bd9Sstevel@tonic-gate# British Columbia
19247c478bd9Sstevel@tonic-gate
19252f9aa4a7Srobbin# From Paul Eggert (2006-03-22):
19262f9aa4a7Srobbin# Shanks & Pottenger write that since 1970 most of this region has
19272f9aa4a7Srobbin# been like Vancouver.
19287c478bd9Sstevel@tonic-gate# Dawson Creek uses MST.  Much of east BC is like Edmonton.
1929a43ba736SRobert Mustacchi
193056b82ca8SDan McDonald# From Matt Johnson (2015-09-21):
193156b82ca8SDan McDonald# Fort Nelson, BC, Canada will cancel DST this year.  So while previously they
193256b82ca8SDan McDonald# were aligned with America/Vancouver, they're now aligned with
193356b82ca8SDan McDonald# America/Dawson_Creek.
193456b82ca8SDan McDonald# http://www.northernrockies.ca/EN/meta/news/archives/2015/northern-rockies-time-change.html
193556b82ca8SDan McDonald#
193656b82ca8SDan McDonald# From Tim Parenti (2015-09-23):
193756b82ca8SDan McDonald# This requires a new zone for the Northern Rockies Regional Municipality,
193856b82ca8SDan McDonald# America/Fort_Nelson.  The resolution of 2014-12-08 was reached following a
193956b82ca8SDan McDonald# 2014-11-15 poll with nearly 75% support.  Effectively, the municipality has
194056b82ca8SDan McDonald# been on MST (-0700) like Dawson Creek since it advanced its clocks on
194156b82ca8SDan McDonald# 2015-03-08.
194256b82ca8SDan McDonald#
1943374df668SAndy Fiddaman# From Paul Eggert (2019-07-25):
194456b82ca8SDan McDonald# Shanks says Fort Nelson did not observe DST in 1946, unlike Vancouver.
194506965442SAndy Fiddaman# Alois Treindl confirmed this on 07-22, citing the 1946-04-27 Vancouver Daily
1946374df668SAndy Fiddaman# Province.  He also cited the 1946-09-28 Victoria Daily Times, which said
1947374df668SAndy Fiddaman# that Vancouver, Victoria, etc. "change at midnight Saturday"; for now,
1948374df668SAndy Fiddaman# guess they meant 02:00 Sunday since 02:00 was common practice in Vancouver.
1949374df668SAndy Fiddaman#
1950374df668SAndy Fiddaman# Early Vancouver, Volume Four, by Major J.S. Matthews, V.D., 2011 edition
1951374df668SAndy Fiddaman# says that a 1922 plebiscite adopted DST, but a 1923 plebiscite rejected it.
1952374df668SAndy Fiddaman# http://former.vancouver.ca/ctyclerk/archives/digitized/EarlyVan/SearchEarlyVan/Vol4pdf/MatthewsEarlyVancouverVol4_DaylightSavings.pdf
1953374df668SAndy Fiddaman# A catalog entry for a newspaper clipping seems to indicate that Vancouver
1954374df668SAndy Fiddaman# observed DST in 1941 from 07-07 through 09-27; see
1955374df668SAndy Fiddaman# https://searcharchives.vancouver.ca/daylight-saving-1918-starts-again-july-7-1941-start-d-s-sept-27-end-of-d-s-1941
1956374df668SAndy Fiddaman# We have no further details, so omit them for now.
195756b82ca8SDan McDonald
1958f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
19597c478bd9Sstevel@tonic-gateRule	Vanc	1918	only	-	Apr	14	2:00	1:00	D
1960a43ba736SRobert MustacchiRule	Vanc	1918	only	-	Oct	27	2:00	0	S
19617c478bd9Sstevel@tonic-gateRule	Vanc	1942	only	-	Feb	 9	2:00	1:00	W # War
19627c478bd9Sstevel@tonic-gateRule	Vanc	1945	only	-	Aug	14	23:00u	1:00	P # Peace
19637c478bd9Sstevel@tonic-gateRule	Vanc	1945	only	-	Sep	30	2:00	0	S
19647c478bd9Sstevel@tonic-gateRule	Vanc	1946	1986	-	Apr	lastSun	2:00	1:00	D
1965374df668SAndy FiddamanRule	Vanc	1946	only	-	Sep	29	2:00	0	S
19667c478bd9Sstevel@tonic-gateRule	Vanc	1947	1961	-	Sep	lastSun	2:00	0	S
19672f9aa4a7SrobbinRule	Vanc	1962	2006	-	Oct	lastSun	2:00	0	S
1968374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
19697c478bd9Sstevel@tonic-gateZone America/Vancouver	-8:12:28 -	LMT	1884
19702f9aa4a7Srobbin			-8:00	Vanc	P%sT	1987
19712f9aa4a7Srobbin			-8:00	Canada	P%sT
19727c478bd9Sstevel@tonic-gateZone America/Dawson_Creek -8:00:56 -	LMT	1884
19737c478bd9Sstevel@tonic-gate			-8:00	Canada	P%sT	1947
19746f8e8937SDan McDonald			-8:00	Vanc	P%sT	1972 Aug 30  2:00
19757c478bd9Sstevel@tonic-gate			-7:00	-	MST
197656b82ca8SDan McDonaldZone America/Fort_Nelson	-8:10:47 -	LMT	1884
197756b82ca8SDan McDonald			-8:00	Vanc	P%sT	1946
197856b82ca8SDan McDonald			-8:00	-	PST	1947
197956b82ca8SDan McDonald			-8:00	Vanc	P%sT	1987
198056b82ca8SDan McDonald			-8:00	Canada	P%sT	2015 Mar  8  2:00
198156b82ca8SDan McDonald			-7:00	-	MST
198206965442SAndy Fiddaman# For Creston see America/Phoenix.
19837c478bd9Sstevel@tonic-gate
19847c478bd9Sstevel@tonic-gate# Northwest Territories, Nunavut, Yukon
19857c478bd9Sstevel@tonic-gate
1986af2e290bSAndy Fiddaman# From Chris Walton (2022-11-06):
1987af2e290bSAndy Fiddaman# Whitehorse Star - Thursday April 22, 1965 - page 1
1988af2e290bSAndy Fiddaman# title: DST Starts Monday ...
1989af2e290bSAndy Fiddaman# https://www.newspapers.com/image/578587481/
1990af2e290bSAndy Fiddaman# The title of this first article is wrong and/or misleading.
1991af2e290bSAndy Fiddaman# Also, the start time shown in the  article is vague; it simply says "after
1992af2e290bSAndy Fiddaman# midnight" when it probably should have stated 2:00a.m....
1993af2e290bSAndy Fiddaman#
1994af2e290bSAndy Fiddaman# Whitehorse Star - Monday October 25, 1965 - page 15 ...
1995af2e290bSAndy Fiddaman# https://www.newspapers.com/image/578589147/
1996af2e290bSAndy Fiddaman# The 1965 Yukon Council minutes can be found here:
1997af2e290bSAndy Fiddaman# http://assets.yukonarchives.ca/PER_YG_06_1965_C20_S02_v1.pdf
1998af2e290bSAndy Fiddaman# ... I do not currently believe that NWT touched any of its clocks in 1965....
1999af2e290bSAndy Fiddaman#
2000af2e290bSAndy Fiddaman# Whitehorse Star - Thursday Feb 24,1966 - page 2
2001af2e290bSAndy Fiddaman# title: It's Time for YDT ...
2002af2e290bSAndy Fiddaman# https://www.newspapers.com/image/578575979/ ...
2003af2e290bSAndy Fiddaman# America/Whitehorse as a permanent change from UTC-9(YST) to
2004af2e290bSAndy Fiddaman# UTC-8(PST) at 00:00 on Sunday February 27, 1966....
2005af2e290bSAndy Fiddaman#
2006af2e290bSAndy Fiddaman# Whitehorse Star - Friday April 28,1972 - page 6
2007af2e290bSAndy Fiddaman# title: Daylight Saving Time for N.W.T....
2008af2e290bSAndy Fiddaman# https://www.newspapers.com/image/578701610/ ...
2009af2e290bSAndy Fiddaman# Nunavut and NWT zones ... DST starting in 1972.... Start and End ...
2010af2e290bSAndy Fiddaman# should be the same as the rest of Canada
2011af2e290bSAndy Fiddaman#
2012af2e290bSAndy Fiddaman#
2013af2e290bSAndy Fiddaman# From Paul Eggert (2022-11-06):
2014af2e290bSAndy Fiddaman# For now, assume Yukon's 1965-04-22 spring forward was 00:00 -> 02:00, as this
2015af2e290bSAndy Fiddaman# seems likely than 02:00 -> 04:00 and matches "after midnight".
2016af2e290bSAndy Fiddaman
20172f9aa4a7Srobbin# From Paul Eggert (2006-03-22):
20187c478bd9Sstevel@tonic-gate# Dawson switched to PST in 1973.  Inuvik switched to MST in 1979.
201980868c53Srobbin# Mathew Englander (1996-10-07) gives the following refs:
20207c478bd9Sstevel@tonic-gate#	* 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,
202156b82ca8SDan McDonald#	c. 7 defines Yukon standard time as UTC-9....
20227c478bd9Sstevel@tonic-gate#	see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).
2023b654b02dSYuri Pankov#	[https://www.canlii.org/en/ca/laws/stat/rsc-1985-c-i-21/latest/rsc-1985-c-i-21.html]
20247c478bd9Sstevel@tonic-gate#	* C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.
20257c478bd9Sstevel@tonic-gate#	* O.I.C. 1980/02 established DST.
20267c478bd9Sstevel@tonic-gate#	* O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00.
202756b82ca8SDan McDonald
202856b82ca8SDan McDonald# From Brian Inglis (2015-04-14):
202956b82ca8SDan McDonald#
203056b82ca8SDan McDonald# I tried to trace the history of Yukon time and found the following
203156b82ca8SDan McDonald# regulations, giving the reference title and URL if found, regulation name,
203256b82ca8SDan McDonald# and relevant quote if available.  Each regulation specifically revokes its
203356b82ca8SDan McDonald# predecessor.  The final reference is to the current Interpretation Act
203456b82ca8SDan McDonald# authorizing and resulting from these regulatory changes.
203556b82ca8SDan McDonald#
203656b82ca8SDan McDonald# Only recent regulations were retrievable via Yukon government site search or
203756b82ca8SDan McDonald# index, and only some via Canadian legal sources.  Other sources used include
203856b82ca8SDan McDonald# articles titled "Standard Time and Time Zones in Canada" from JRASC via ADS
203956b82ca8SDan McDonald# Abstracts, cited by ADO for 1932 ..., and updated versions from 1958 and
204056b82ca8SDan McDonald# 1970 quoted below; each article includes current extracts from provincial
204156b82ca8SDan McDonald# and territorial ST and DST regulations at the end, summaries and details of
204256b82ca8SDan McDonald# standard times and daylight saving time at many locations across Canada,
204356b82ca8SDan McDonald# with time zone maps, tables and calculations for Canadian Sunrise, Sunset,
204456b82ca8SDan McDonald# and LMST; they also cover many countries and global locations, with a chart
204556b82ca8SDan McDonald# and table showing current Universal Time offsets, and may be useful as
204656b82ca8SDan McDonald# another source of information for 1970 and earlier.
204756b82ca8SDan McDonald#
204856b82ca8SDan McDonald# * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26,
204956b82ca8SDan McDonald#   pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS)
205056b82ca8SDan McDonald#   http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75:
205156b82ca8SDan McDonald#   Yukon Interpretation Ordinance
205256b82ca8SDan McDonald#   Yukon standard time is the local mean time at the one hundred and
205356b82ca8SDan McDonald#   thirty-fifth meridian.
205456b82ca8SDan McDonald#
205556b82ca8SDan McDonald# * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.;
205656b82ca8SDan McDonald#   JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System
205756b82ca8SDan McDonald#   (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1:
205856b82ca8SDan McDonald#   Yukon Interpretation Ordinance, 1955, Chap. 16.
205956b82ca8SDan McDonald#
206056b82ca8SDan McDonald#     (1) Subject to this section, standard time shall be reckoned as nine
206156b82ca8SDan McDonald#     hours behind Greenwich Time and called Yukon Standard Time.
206256b82ca8SDan McDonald#
206356b82ca8SDan McDonald#     (2) Notwithstanding subsection (1), the Commissioner may make regulations
206456b82ca8SDan McDonald#     varying the manner of reckoning standard time.
206556b82ca8SDan McDonald#
206656b82ca8SDan McDonald# * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance
2067374df668SAndy Fiddaman#   [no online source found]
206856b82ca8SDan McDonald#
206956b82ca8SDan McDonald# * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC,
207056b82ca8SDan McDonald#   Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS)
207156b82ca8SDan McDonald#   http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon
207256b82ca8SDan McDonald#   Territory Commissioner's Order 1967-59 Interpretation Ordinance ...
207356b82ca8SDan McDonald#
207456b82ca8SDan McDonald#     1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon
207556b82ca8SDan McDonald#     Territory on 27th January, 1966, is hereby revoked.
207656b82ca8SDan McDonald#
207756b82ca8SDan McDonald#     2. Yukon (East) Standard Time as defined by section 36 of the
207856b82ca8SDan McDonald#     Interpretation Ordinance from and after mid-night on the 28th day of May,
207956b82ca8SDan McDonald#     1967 shall be reckoned in the same manner as Pacific Standard Time, that
208056b82ca8SDan McDonald#     is to say, eight hours behind Greenwich Time in the area of the Yukon
208156b82ca8SDan McDonald#     Territory lying east of the 138th degree longitude west.
208256b82ca8SDan McDonald#
208356b82ca8SDan McDonald#     3. In the remainder of the Territory, lying west of the 138th degree
208456b82ca8SDan McDonald#     longitude west, Yukon (West) Standard Time shall be reckoned as nine
208556b82ca8SDan McDonald#     hours behind Greenwich Time.
208656b82ca8SDan McDonald#
208756b82ca8SDan McDonald# * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214
2088b654b02dSYuri Pankov#   https://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html
208956b82ca8SDan McDonald#   C.O. 1973/214 INTERPRETATION ACT ...
209056b82ca8SDan McDonald#
209156b82ca8SDan McDonald#     1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby
209256b82ca8SDan McDonald#     revoked.
209356b82ca8SDan McDonald#
209456b82ca8SDan McDonald#     2. Yukon Standard Time as defined by section 36 of the Interpretation
209556b82ca8SDan McDonald#     Act from and after midnight on the twenty-eighth day of October, 1973
209656b82ca8SDan McDonald#     shall be reckoned in the same manner as Pacific Standard Time, that is
209756b82ca8SDan McDonald#     to say eight hours behind Greenwich Time.
209856b82ca8SDan McDonald#
209956b82ca8SDan McDonald# * O.I.C. 1980/02 INTERPRETATION ACT
2100f915e6d3SRobert Mustacchi#   https://mm.icann.org/pipermail/tz/attachments/20201125/d5adc93b/CAYTOIC1980-02DST1980-01-04-0001.pdf
210156b82ca8SDan McDonald#
210256b82ca8SDan McDonald# * Yukon Daylight Saving Time, YOIC 1987/56
2103b654b02dSYuri Pankov#   https://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html
210456b82ca8SDan McDonald#   O.I.C. 1987/056 INTERPRETATION ACT ...
210556b82ca8SDan McDonald#
210656b82ca8SDan McDonald#   In every year between
210756b82ca8SDan McDonald#     (a) two o'clock in the morning in the first Sunday in April, and
210856b82ca8SDan McDonald#     (b) two o'clock in the morning in the last Sunday in October,
210956b82ca8SDan McDonald#   Standard Time shall be reckoned as seven hours behind Greenwich Time and
211056b82ca8SDan McDonald#   called Yukon Daylight Saving Time.
211156b82ca8SDan McDonald#   ...
211256b82ca8SDan McDonald#   Dated ... 9th day of March, A.D., 1987.
211356b82ca8SDan McDonald#
211456b82ca8SDan McDonald# * Yukon Daylight Saving Time 2006, YOIC 2006/127
2115b654b02dSYuri Pankov#   https://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html
211656b82ca8SDan McDonald#   O.I.C. 2006/127 INTERPRETATION ACT ...
211756b82ca8SDan McDonald#
211856b82ca8SDan McDonald#     1. In Yukon each year the time for general purposes shall be 7 hours
211956b82ca8SDan McDonald#     behind Greenwich mean time during the period commencing at two o'clock
212056b82ca8SDan McDonald#     in the forenoon on the second Sunday of March and ending at two o'clock
212156b82ca8SDan McDonald#     in the forenoon on the first Sunday of November and shall be called
212256b82ca8SDan McDonald#     Yukon Daylight Saving Time.
212356b82ca8SDan McDonald#
212456b82ca8SDan McDonald#     2. Order-in-Council 1987/56 is revoked.
212556b82ca8SDan McDonald#
212656b82ca8SDan McDonald#     3. This order comes into force January 1, 2007.
212756b82ca8SDan McDonald#
212856b82ca8SDan McDonald# * Interpretation Act, RSY 2002, c 125
2129b654b02dSYuri Pankov# https://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html
21307c478bd9Sstevel@tonic-gate
2131af2e290bSAndy Fiddaman# From Chris Walton (2022-11-06):
2132af2e290bSAndy Fiddaman# The 5th edition of the Atlas of Canada contains a time zone map that
2133af2e290bSAndy Fiddaman# shows both legislated and observed time zone boundaries.
2134af2e290bSAndy Fiddaman# All communities on Baffin Island are shown to be observing Eastern time.
2135af2e290bSAndy Fiddaman# The date on the map is 1984.
2136af2e290bSAndy Fiddaman# https://ftp.maps.canada.ca/pub/nrcan_rncan/raster/atlas_5_ed/eng/other/referencemaps/mcr4056.pdf
2137af2e290bSAndy Fiddaman
21387c478bd9Sstevel@tonic-gate# From Rives McDow (1999-09-04):
21397c478bd9Sstevel@tonic-gate# Nunavut ... moved ... to incorporate the whole territory into one time zone.
21407c478bd9Sstevel@tonic-gate# Nunavut moves to single time zone Oct. 31
21416f8e8937SDan McDonald# http://www.nunatsiaq.com/nunavut/nvt90903_13.html
21427c478bd9Sstevel@tonic-gate
21437c478bd9Sstevel@tonic-gate# From Paul Eggert (1999-09-20):
21447c478bd9Sstevel@tonic-gate# Basic Facts: The New Territory
21456f8e8937SDan McDonald# http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html
2146af2e290bSAndy Fiddaman# (1999) reports that ... Coral Harbour does not observe DST.
21477c478bd9Sstevel@tonic-gate
21487c478bd9Sstevel@tonic-gate# From Paul Eggert (2000-10-02):
21497c478bd9Sstevel@tonic-gate# Matthews and Vincent (1998) say the following, but we lack histories
21507c478bd9Sstevel@tonic-gate# for these potential new Zones.
21517c478bd9Sstevel@tonic-gate#
21527c478bd9Sstevel@tonic-gate# The Canadian Forces station at Alert uses Eastern Time while the
21537c478bd9Sstevel@tonic-gate# handful of residents at the Eureka weather station [in the Central
21547c478bd9Sstevel@tonic-gate# zone] skip daylight savings.  Baffin Island, which is crossed by the
21557c478bd9Sstevel@tonic-gate# Central, Eastern and Atlantic Time zones only uses Eastern Time.
21567c478bd9Sstevel@tonic-gate# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of
21577c478bd9Sstevel@tonic-gate# Central Time and Southampton Island [in the Central zone] is not
21587c478bd9Sstevel@tonic-gate# required to use daylight savings.
21597c478bd9Sstevel@tonic-gate
2160b654b02dSYuri Pankov# From <http://www.nunatsiaqonline.ca/archives/nunavut001130/nvt21110_02.html>
21616f8e8937SDan McDonald# Nunavut now has two time zones (2000-11-10):
21627c478bd9Sstevel@tonic-gate# The Nunavut government would allow its employees in Kugluktuk and
21637c478bd9Sstevel@tonic-gate# Cambridge Bay to operate on central time year-round, putting them
21647c478bd9Sstevel@tonic-gate# one hour behind the rest of Nunavut for six months during the winter.
21657c478bd9Sstevel@tonic-gate# At the end of October the two communities had rebelled against
21667c478bd9Sstevel@tonic-gate# Nunavut's unified time zone, refusing to shift to eastern time with
21677c478bd9Sstevel@tonic-gate# the rest of the territory for the winter.  Cambridge Bay remained on
21687c478bd9Sstevel@tonic-gate# central time, while Kugluktuk, even farther west, reverted to
21697c478bd9Sstevel@tonic-gate# mountain time, which they had used before the advent of Nunavut's
21707c478bd9Sstevel@tonic-gate# unified time zone in 1999.
21717c478bd9Sstevel@tonic-gate#
21727c478bd9Sstevel@tonic-gate# From Rives McDow (2001-01-20), quoting the Nunavut government:
21737c478bd9Sstevel@tonic-gate# The preceding decision came into effect at midnight, Saturday Nov 4, 2000.
21747c478bd9Sstevel@tonic-gate
21757c478bd9Sstevel@tonic-gate# From Paul Eggert (2000-12-04):
21767c478bd9Sstevel@tonic-gate# Let's just keep track of the official times for now.
21777c478bd9Sstevel@tonic-gate
21787c478bd9Sstevel@tonic-gate# From Rives McDow (2001-03-07):
21797c478bd9Sstevel@tonic-gate# The premier of Nunavut has issued a ministerial statement advising
21807c478bd9Sstevel@tonic-gate# that effective 2001-04-01, the territory of Nunavut will revert
21817c478bd9Sstevel@tonic-gate# back to three time zones (mountain, central, and eastern).  Of the
21827c478bd9Sstevel@tonic-gate# cities in Nunavut, Coral Harbor is the only one that I know of that
21837c478bd9Sstevel@tonic-gate# has said it will not observe dst, staying on EST year round.  I'm
21847c478bd9Sstevel@tonic-gate# checking for more info, and will get back to you if I come up with
21857c478bd9Sstevel@tonic-gate# more.
21867c478bd9Sstevel@tonic-gate# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).]
21877c478bd9Sstevel@tonic-gate
218880868c53Srobbin# From Gwillim Law (2005-05-21):
218900973057SDan McDonald# According to ...
219080868c53Srobbin# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp
219180868c53Srobbin# (from a 1998 Canadian Geographic article), the de facto and de jure time
219280868c53Srobbin# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year
219380868c53Srobbin# round.  Using Google, it's easy to find other websites that confirm this.
219480868c53Srobbin# I wasn't able to find how far back this time regimen goes, but since it
219580868c53Srobbin# predates the creation of Nunavut, it probably goes back many years....
219680868c53Srobbin# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used.
219780868c53Srobbin#
219800973057SDan McDonald# From Paul Eggert (2014-10-17):
219980868c53Srobbin# For lack of better information, assume that Southampton Island observed
220000973057SDan McDonald# daylight saving only during wartime.  Gwillim Law's email also
220100973057SDan McDonald# mentioned maps now maintained by National Research Council Canada;
220200973057SDan McDonald# see above for an up-to-date link.
220380868c53Srobbin
2204a68d064cSrobbin# From Chris Walton (2007-03-01):
2205a68d064cSrobbin# ... the community of Resolute (located on Cornwallis Island in
2206a68d064cSrobbin# Nunavut) moved from Central Time to Eastern Time last November.
2207a68d064cSrobbin# Basically the community did not change its clocks at the end of
2208a68d064cSrobbin# daylight saving....
2209a68d064cSrobbin# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html
2210a68d064cSrobbin
2211abaa65c8SYuri Pankov# From Chris Walton (2011-03-21):
2212abaa65c8SYuri Pankov# Back in 2007 I initiated the creation of a new "zone file" for Resolute
2213abaa65c8SYuri Pankov# Bay. Resolute Bay is a small community located about 900km north of
2214abaa65c8SYuri Pankov# the Arctic Circle. The zone file was required because Resolute Bay had
2215abaa65c8SYuri Pankov# decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007.
2216abaa65c8SYuri Pankov#
2217abaa65c8SYuri Pankov# According to new information which I received last week, Resolute Bay
2218abaa65c8SYuri Pankov# went back to using UTC-6 in the winter of 2007-2008...
2219abaa65c8SYuri Pankov#
2220abaa65c8SYuri Pankov# On March 11/2007 most of Canada went onto daylight saving. On March
2221abaa65c8SYuri Pankov# 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I
2222abaa65c8SYuri Pankov# talked to somebody that was both knowledgeable and helpful. I was able
2223abaa65c8SYuri Pankov# to confirm that Resolute Bay was still operating on UTC-5. It was
2224abaa65c8SYuri Pankov# explained to me that Resolute Bay had been on the Eastern Time zone
2225abaa65c8SYuri Pankov# (EST) in the winter, and was now back on the Central Time zone (CDT).
2226abaa65c8SYuri Pankov# i.e. the time zone had changed twice in the last year but the clocks
2227abaa65c8SYuri Pankov# had not moved. The residents had to know which time zone they were in
2228abaa65c8SYuri Pankov# so they could follow the correct TV schedule...
2229abaa65c8SYuri Pankov#
2230abaa65c8SYuri Pankov# On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I
2231abaa65c8SYuri Pankov# phoned the Resolute Bay hamlet office...[D]ue to the challenging nature
2232abaa65c8SYuri Pankov# of the phone call, I decided to seek out an alternate source of
2233abaa65c8SYuri Pankov# information. I found an e-mail address for somebody by the name of
2234abaa65c8SYuri Pankov# Stephanie Adams whose job was listed as "Inns North Support Officer for
2235abaa65c8SYuri Pankov# Arctic Co-operatives." I was under the impression that Stephanie lived
2236abaa65c8SYuri Pankov# and worked in Resolute Bay...
2237abaa65c8SYuri Pankov#
2238abaa65c8SYuri Pankov# On March 14/2011 I phoned the hamlet office again. I was told that
2239abaa65c8SYuri Pankov# Resolute Bay had been using Central Standard Time over the winter of
2240abaa65c8SYuri Pankov# 2010-2011 and that the clocks had therefore been moved one hour ahead
2241abaa65c8SYuri Pankov# on March 13/2011. The person I talked to was aware that Resolute Bay
2242abaa65c8SYuri Pankov# had previously experimented with Eastern Standard Time but he could not
2243abaa65c8SYuri Pankov# tell me when the practice had stopped.
2244abaa65c8SYuri Pankov#
2245abaa65c8SYuri Pankov# On March 17/2011 I searched the Web to find an e-mail address of
2246abaa65c8SYuri Pankov# somebody that might be able to tell me exactly when Resolute Bay went
2247abaa65c8SYuri Pankov# off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz
2248abaa65c8SYuri Pankov# used to be the mayor of Resolute Bay and he apparently owns half the
2249abaa65c8SYuri Pankov# businesses including "South Camp Inn." This website has some info on
2250abaa65c8SYuri Pankov# Aziz:
2251abaa65c8SYuri Pankov# http://www.uphere.ca/node/493
2252a68d064cSrobbin#
2253abaa65c8SYuri Pankov# I sent Aziz an e-mail asking when Resolute Bay had stopped using
2254abaa65c8SYuri Pankov# Eastern Standard Time.
2255abaa65c8SYuri Pankov#
2256abaa65c8SYuri Pankov# Aziz responded quickly with this: "hi, The time was not changed for the
2257abaa65c8SYuri Pankov# 1 year only, the following year, the community went back to the old way
2258abaa65c8SYuri Pankov# of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in
2259abaa65c8SYuri Pankov# the winter Zulu plus 6 hrs"
2260abaa65c8SYuri Pankov#
2261abaa65c8SYuri Pankov# This of course conflicted with everything I had ascertained in November 2008.
2262abaa65c8SYuri Pankov#
2263abaa65c8SYuri Pankov# I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz
2264abaa65c8SYuri Pankov# responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You
2265abaa65c8SYuri Pankov# may want to check with the weather office in Resolute Bay or do a
2266abaa65c8SYuri Pankov# search on the weather through Env. Canada. web site"
2267abaa65c8SYuri Pankov#
2268abaa65c8SYuri Pankov# If I had realized the Stephanie did not live in Resolute Bay I would
2269abaa65c8SYuri Pankov# never have contacted her.  I now believe that all the information I
2270abaa65c8SYuri Pankov# obtained in November 2008 should be ignored...
2271abaa65c8SYuri Pankov# I apologize for reporting incorrect information in 2008.
22722f9aa4a7Srobbin
22735254d4faSAndy Fiddaman# From Tim Parenti (2020-03-05):
22745254d4faSAndy Fiddaman# The government of Yukon announced [yesterday] the cessation of seasonal time
22755254d4faSAndy Fiddaman# changes.  "After clocks are pushed ahead one hour on March 8, the territory
22765254d4faSAndy Fiddaman# will remain on [UTC-07].  ... [The government] found 93 per cent of
22775254d4faSAndy Fiddaman# respondents wanted to end seasonal time changes and, of that group, 70 per
22785254d4faSAndy Fiddaman# cent wanted 'permanent Pacific Daylight Saving Time.'"
22795254d4faSAndy Fiddaman# https://www.cbc.ca/news/canada/north/yukon-end-daylight-saving-time-1.5486358
22805254d4faSAndy Fiddaman#
22815254d4faSAndy Fiddaman# Although the government press release prefers PDT, we prefer MST for
22825254d4faSAndy Fiddaman# consistency with nearby Dawson Creek, Creston, and Fort Nelson.
22835254d4faSAndy Fiddaman# https://yukon.ca/en/news/yukon-end-seasonal-time-change
22845254d4faSAndy Fiddaman
2285f915e6d3SRobert Mustacchi# From Andrew G. Smith (2020-09-24):
2286f915e6d3SRobert Mustacchi# Yukon has completed its regulatory change to be on UTC -7 year-round....
2287f915e6d3SRobert Mustacchi# http://www.gov.yk.ca/legislation/regs/oic2020_125.pdf
2288f915e6d3SRobert Mustacchi# What we have done is re-defined Yukon Standard Time, as we are
2289f915e6d3SRobert Mustacchi# authorized to do under section 33 of our Interpretation Act:
2290f915e6d3SRobert Mustacchi# http://www.gov.yk.ca/legislation/acts/interpretation_c.pdf
2291f915e6d3SRobert Mustacchi#
2292f915e6d3SRobert Mustacchi# From Paul Eggert (2020-09-24):
2293f915e6d3SRobert Mustacchi# tzdb uses the obsolete YST abbreviation for standard time in Yukon through
2294f915e6d3SRobert Mustacchi# about 1970, and uses PST for standard time in Yukon since then.  Consistent
2295f915e6d3SRobert Mustacchi# with that, use MST for -07, the new standard time in Yukon effective Nov. 1.
2296f915e6d3SRobert Mustacchi
2297f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
22987c478bd9Sstevel@tonic-gateRule	NT_YK	1918	only	-	Apr	14	2:00	1:00	D
22997c478bd9Sstevel@tonic-gateRule	NT_YK	1918	only	-	Oct	27	2:00	0	S
23007c478bd9Sstevel@tonic-gateRule	NT_YK	1919	only	-	May	25	2:00	1:00	D
23017c478bd9Sstevel@tonic-gateRule	NT_YK	1919	only	-	Nov	 1	0:00	0	S
23027c478bd9Sstevel@tonic-gateRule	NT_YK	1942	only	-	Feb	 9	2:00	1:00	W # War
23037c478bd9Sstevel@tonic-gateRule	NT_YK	1945	only	-	Aug	14	23:00u	1:00	P # Peace
23047c478bd9Sstevel@tonic-gateRule	NT_YK	1945	only	-	Sep	30	2:00	0	S
2305af2e290bSAndy FiddamanRule	NT_YK	1972	1986	-	Apr	lastSun	2:00	1:00	D
2306af2e290bSAndy FiddamanRule	NT_YK	1972	2006	-	Oct	lastSun	2:00	0	S
23072f9aa4a7SrobbinRule	NT_YK	1987	2006	-	Apr	Sun>=1	2:00	1:00	D
2308af2e290bSAndy FiddamanRule	Yukon	1965	only	-	Apr	lastSun	0:00	2:00	DD
2309af2e290bSAndy FiddamanRule	Yukon	1965	only	-	Oct	lastSun	2:00	0	S
2310374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
2311a68d064cSrobbin# formerly Frobisher Bay
2312c2d5ab87SDan McDonaldZone America/Iqaluit	0	-	-00	1942 Aug # Frobisher Bay est.
23136f8e8937SDan McDonald			-5:00	NT_YK	E%sT	1999 Oct 31  2:00
23146f8e8937SDan McDonald			-6:00	Canada	C%sT	2000 Oct 29  2:00
23157c478bd9Sstevel@tonic-gate			-5:00	Canada	E%sT
2316a68d064cSrobbin# aka Qausuittuq
2317c2d5ab87SDan McDonaldZone America/Resolute	0	-	-00	1947 Aug 31 # Resolute founded
23186f8e8937SDan McDonald			-6:00	NT_YK	C%sT	2000 Oct 29  2:00
23196f8e8937SDan McDonald			-5:00	-	EST	2001 Apr  1  3:00
23206f8e8937SDan McDonald			-6:00	Canada	C%sT	2006 Oct 29  2:00
23216f8e8937SDan McDonald			-5:00	-	EST	2007 Mar 11  3:00
2322abaa65c8SYuri Pankov			-6:00	Canada	C%sT
2323a68d064cSrobbin# aka Kangiqiniq
2324c2d5ab87SDan McDonaldZone America/Rankin_Inlet 0	-	-00	1957 # Rankin Inlet founded
23256f8e8937SDan McDonald			-6:00	NT_YK	C%sT	2000 Oct 29  2:00
23266f8e8937SDan McDonald			-5:00	-	EST	2001 Apr  1  3:00
23277c478bd9Sstevel@tonic-gate			-6:00	Canada	C%sT
2328a68d064cSrobbin# aka Iqaluktuuttiaq
2329c2d5ab87SDan McDonaldZone America/Cambridge_Bay 0	-	-00	1920 # trading post est.?
23306f8e8937SDan McDonald			-7:00	NT_YK	M%sT	1999 Oct 31  2:00
23316f8e8937SDan McDonald			-6:00	Canada	C%sT	2000 Oct 29  2:00
23326f8e8937SDan McDonald			-5:00	-	EST	2000 Nov  5  0:00
23336f8e8937SDan McDonald			-6:00	-	CST	2001 Apr  1  3:00
23347c478bd9Sstevel@tonic-gate			-7:00	Canada	M%sT
2335c2d5ab87SDan McDonaldZone America/Inuvik	0	-	-00	1953 # Inuvik founded
23366f8e8937SDan McDonald			-8:00	NT_YK	P%sT	1979 Apr lastSun  2:00
23372f9aa4a7Srobbin			-7:00	NT_YK	M%sT	1980
23382f9aa4a7Srobbin			-7:00	Canada	M%sT
23397c478bd9Sstevel@tonic-gateZone America/Whitehorse	-9:00:12 -	LMT	1900 Aug 20
2340af2e290bSAndy Fiddaman			-9:00	NT_YK	Y%sT	1965
2341af2e290bSAndy Fiddaman			-9:00	Yukon	Y%sT	1966 Feb 27  0:00
2342af2e290bSAndy Fiddaman			-8:00	-	PST	1980
2343f915e6d3SRobert Mustacchi			-8:00	Canada	P%sT	2020 Nov  1
23445254d4faSAndy Fiddaman			-7:00	-	MST
23457c478bd9Sstevel@tonic-gateZone America/Dawson	-9:17:40 -	LMT	1900 Aug 20
2346af2e290bSAndy Fiddaman			-9:00	NT_YK	Y%sT	1965
2347af2e290bSAndy Fiddaman			-9:00	Yukon	Y%sT	1973 Oct 28  0:00
2348af2e290bSAndy Fiddaman			-8:00	-	PST	1980
2349f915e6d3SRobert Mustacchi			-8:00	Canada	P%sT	2020 Nov  1
23505254d4faSAndy Fiddaman			-7:00	-	MST
23517c478bd9Sstevel@tonic-gate
23527c478bd9Sstevel@tonic-gate
23537c478bd9Sstevel@tonic-gate###############################################################################
23547c478bd9Sstevel@tonic-gate
23557c478bd9Sstevel@tonic-gate# Mexico
23567c478bd9Sstevel@tonic-gate
235700973057SDan McDonald# From Paul Eggert (2014-12-07):
23587c478bd9Sstevel@tonic-gate# The Investigation and Analysis Service of the
23597c478bd9Sstevel@tonic-gate# Mexican Library of Congress (MLoC) has published a
23607c478bd9Sstevel@tonic-gate# history of Mexican local time (in Spanish)
236100973057SDan McDonald# http://www.diputados.gob.mx/bibliot/publica/inveyana/polisoc/horver/index.htm
23627c478bd9Sstevel@tonic-gate#
23632f9aa4a7Srobbin# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC.
23647c478bd9Sstevel@tonic-gate# (In all cases we go with the MLoC.)
23652f9aa4a7Srobbin# S&P report that Baja was at -8:00 in 1922/1923.
23662f9aa4a7Srobbin# S&P say the 1930 transition in Baja was 1930-11-16.
23672f9aa4a7Srobbin# S&P report no DST during summer 1931.
23682f9aa4a7Srobbin# S&P report a transition at 1932-03-30 23:00, not 1932-04-01.
23697c478bd9Sstevel@tonic-gate
23707c478bd9Sstevel@tonic-gate# From Gwillim Law (2001-02-20):
23717c478bd9Sstevel@tonic-gate# There are some other discrepancies between the Decrees page and the
23727c478bd9Sstevel@tonic-gate# tz database.  I think they can best be explained by supposing that
23737c478bd9Sstevel@tonic-gate# the researchers who prepared the Decrees page failed to find some of
23747c478bd9Sstevel@tonic-gate# the relevant documents.
23757c478bd9Sstevel@tonic-gate
237680868c53Srobbin# From Alan Perry (1996-02-15):
23777c478bd9Sstevel@tonic-gate# A guy from our Mexico subsidiary finally found the Presidential Decree
23787c478bd9Sstevel@tonic-gate# outlining the timezone changes in Mexico.
23797c478bd9Sstevel@tonic-gate#
23807c478bd9Sstevel@tonic-gate# ------------- Begin Forwarded Message -------------
23817c478bd9Sstevel@tonic-gate#
23827c478bd9Sstevel@tonic-gate# I finally got my hands on the Official Presidential Decree that sets up the
23837c478bd9Sstevel@tonic-gate# rules for the DST changes. The rules are:
23847c478bd9Sstevel@tonic-gate#
23857c478bd9Sstevel@tonic-gate# 1. The country is divided in 3 timezones:
23867c478bd9Sstevel@tonic-gate#    - Baja California Norte (the Mexico/BajaNorte TZ)
23877c478bd9Sstevel@tonic-gate#    - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ)
23887c478bd9Sstevel@tonic-gate#    - The rest of the country (the Mexico/General TZ)
23897c478bd9Sstevel@tonic-gate#
23907c478bd9Sstevel@tonic-gate# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October
23917c478bd9Sstevel@tonic-gate#    at 2:00 AM, the times in each zone are as follows:
23927c478bd9Sstevel@tonic-gate#    BajaNorte: GMT+7
23937c478bd9Sstevel@tonic-gate#    BajaSur:   GMT+6
23947c478bd9Sstevel@tonic-gate#    General:   GMT+5
23957c478bd9Sstevel@tonic-gate#
23967c478bd9Sstevel@tonic-gate# 3. The rest of the year, the times are as follows:
23977c478bd9Sstevel@tonic-gate#    BajaNorte: GMT+8
23987c478bd9Sstevel@tonic-gate#    BajaSur:   GMT+7
23997c478bd9Sstevel@tonic-gate#    General:   GMT+6
24007c478bd9Sstevel@tonic-gate#
24017c478bd9Sstevel@tonic-gate# The Decree was published in Mexico's Official Newspaper on January 4th.
24027c478bd9Sstevel@tonic-gate#
24037c478bd9Sstevel@tonic-gate# -------------- End Forwarded Message --------------
24047c478bd9Sstevel@tonic-gate# From Paul Eggert (1996-06-12):
24057c478bd9Sstevel@tonic-gate# For an English translation of the decree, see
2406a43ba736SRobert Mustacchi# "Diario Oficial: Time Zone Changeover" (1996-01-04).
24076f8e8937SDan McDonald# http://mexico-travel.com/extra/timezone_eng.html
24087c478bd9Sstevel@tonic-gate
24097c478bd9Sstevel@tonic-gate# From Rives McDow (1998-10-08):
24107c478bd9Sstevel@tonic-gate# The State of Quintana Roo has reverted back to central STD and DST times
24117c478bd9Sstevel@tonic-gate# (i.e. UTC -0600 and -0500 as of 1998-08-02).
24127c478bd9Sstevel@tonic-gate
24137c478bd9Sstevel@tonic-gate# From Rives McDow (2000-01-10):
24147c478bd9Sstevel@tonic-gate# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time
24157c478bd9Sstevel@tonic-gate# zone 5 hours from the International Date Line, and will not observe daylight
24167c478bd9Sstevel@tonic-gate# savings time so as to stay on the same time zone as the southern part of
24177c478bd9Sstevel@tonic-gate# Arizona year round.
24187c478bd9Sstevel@tonic-gate
24196f8e8937SDan McDonald# From Jesper Nørgaard, translating
24207c478bd9Sstevel@tonic-gate# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17):
24217c478bd9Sstevel@tonic-gate# In Oaxaca, the 55.000 teachers from the Section 22 of the National
24227c478bd9Sstevel@tonic-gate# Syndicate of Education Workers, refuse to apply daylight saving each
24237c478bd9Sstevel@tonic-gate# year, so that the more than 10,000 schools work at normal hour the
24247c478bd9Sstevel@tonic-gate# whole year.
24257c478bd9Sstevel@tonic-gate
24267c478bd9Sstevel@tonic-gate# From Gwillim Law (2001-01-19):
24277c478bd9Sstevel@tonic-gate# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says
24287c478bd9Sstevel@tonic-gate# (translated):...
24297c478bd9Sstevel@tonic-gate# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced
24307c478bd9Sstevel@tonic-gate# that Summer Time will be reduced from seven to five months, starting
24317c478bd9Sstevel@tonic-gate# this year....
24326f8e8937SDan McDonald# http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001
24337c478bd9Sstevel@tonic-gate# [translated], says "summer time will ... take effect on the first Sunday
24347c478bd9Sstevel@tonic-gate# in May, and end on the last Sunday of September.
24357c478bd9Sstevel@tonic-gate
24367c478bd9Sstevel@tonic-gate# From Arthur David Olson (2001-01-25):
24377c478bd9Sstevel@tonic-gate# The 2001-01-24 traditional Washington Post contained the page one
24387c478bd9Sstevel@tonic-gate# story "Timely Issue Divides Mexicans."...
24397c478bd9Sstevel@tonic-gate# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html
24406f8e8937SDan McDonald# ... Mexico City Mayor López Obrador "...is threatening to keep
24417c478bd9Sstevel@tonic-gate# Mexico City and its 20 million residents on a different time than
24426f8e8937SDan McDonald# the rest of the country..." In particular, López Obrador would abolish
24437c478bd9Sstevel@tonic-gate# observation of Daylight Saving Time.
24447c478bd9Sstevel@tonic-gate
24457c478bd9Sstevel@tonic-gate# Official statute published by the Energy Department
24466f8e8937SDan McDonald# http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre
24476f8e8937SDan McDonald# (2001-02-01) shows Baja and Chihauhua as still using US DST rules,
24486f8e8937SDan McDonald# and Sonora with no DST.  This was reported by Jesper Nørgaard (2001-02-03).
24497c478bd9Sstevel@tonic-gate
24507c478bd9Sstevel@tonic-gate# From Paul Eggert (2001-03-03):
24517c478bd9Sstevel@tonic-gate#
2452374df668SAndy Fiddaman# https://www.latimes.com/archives/la-xpm-2001-mar-03-mn-32561-story.html
24537c478bd9Sstevel@tonic-gate# James F. Smith writes in today's LA Times
24547c478bd9Sstevel@tonic-gate# * Sonora will continue to observe standard time.
24556f8e8937SDan McDonald# * Last week Mexico City's mayor Andrés Manuel López Obrador decreed that
24567c478bd9Sstevel@tonic-gate#   the Federal District will not adopt DST.
24577c478bd9Sstevel@tonic-gate# * 4 of 16 district leaders announced they'll ignore the decree.
24587c478bd9Sstevel@tonic-gate# * The decree does not affect federal-controlled facilities including
24597c478bd9Sstevel@tonic-gate#   the airport, banks, hospitals, and schools.
24607c478bd9Sstevel@tonic-gate#
24617c478bd9Sstevel@tonic-gate# For now we'll assume that the Federal District will bow to federal rules.
24627c478bd9Sstevel@tonic-gate
24636f8e8937SDan McDonald# From Jesper Nørgaard (2001-04-01):
24647c478bd9Sstevel@tonic-gate# I found some references to the Mexican application of daylight
24657c478bd9Sstevel@tonic-gate# saving, which modifies what I had already sent you, stating earlier
24667c478bd9Sstevel@tonic-gate# that a number of northern Mexican states would go on daylight
24677c478bd9Sstevel@tonic-gate# saving. The modification reverts this to only cover Baja California
24687c478bd9Sstevel@tonic-gate# (Norte), while all other states (except Sonora, who has no daylight
24697c478bd9Sstevel@tonic-gate# saving all year) will follow the original decree of president
24707c478bd9Sstevel@tonic-gate# Vicente Fox, starting daylight saving May 6, 2001 and ending
24717c478bd9Sstevel@tonic-gate# September 30, 2001.
24726f8e8937SDan McDonald# References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp>
24737c478bd9Sstevel@tonic-gate# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31)
24747c478bd9Sstevel@tonic-gate
24757c478bd9Sstevel@tonic-gate# From Reuters (2001-09-04):
24767c478bd9Sstevel@tonic-gate# Mexico's Supreme Court on Tuesday declared that daylight savings was
24777c478bd9Sstevel@tonic-gate# unconstitutional in Mexico City, creating the possibility the
24787c478bd9Sstevel@tonic-gate# capital will be in a different time zone from the rest of the nation
24797c478bd9Sstevel@tonic-gate# next year....  The Supreme Court's ruling takes effect at 2:00
24807c478bd9Sstevel@tonic-gate# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to
24817c478bd9Sstevel@tonic-gate# standard time. "This is so residents of the Federal District are not
24827c478bd9Sstevel@tonic-gate# subject to unexpected time changes," a statement from the court said.
24837c478bd9Sstevel@tonic-gate
24846f8e8937SDan McDonald# From Jesper Nørgaard Welen (2002-03-12):
24857c478bd9Sstevel@tonic-gate# ... consulting my local grocery store(!) and my coworkers, they all insisted
24867c478bd9Sstevel@tonic-gate# that a new decision had been made to reinstate US style DST in Mexico....
24877c478bd9Sstevel@tonic-gate# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20)
24887c478bd9Sstevel@tonic-gate# confirms this.  Sonora as usual is the only state where DST is not applied.
24897c478bd9Sstevel@tonic-gate
2490d58a41b7SNobutomo Nakano# From Steffen Thorsen (2009-12-28):
2491d58a41b7SNobutomo Nakano#
2492d58a41b7SNobutomo Nakano# Steffen Thorsen wrote:
2493d58a41b7SNobutomo Nakano# > Mexico's House of Representatives has approved a proposal for northern
2494d58a41b7SNobutomo Nakano# > Mexico's border cities to share the same daylight saving schedule as
2495d58a41b7SNobutomo Nakano# > the United States.
2496d58a41b7SNobutomo Nakano# Now this has passed both the Congress and the Senate, so starting from
2497d58a41b7SNobutomo Nakano# 2010, some border regions will be the same:
2498d58a41b7SNobutomo Nakano# http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/
2499d58a41b7SNobutomo Nakano# http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939
2500d58a41b7SNobutomo Nakano# (Spanish)
2501d58a41b7SNobutomo Nakano#
2502d58a41b7SNobutomo Nakano# Could not find the new law text, but the proposed law text changes are here:
2503d58a41b7SNobutomo Nakano# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf
2504d58a41b7SNobutomo Nakano# (Gaceta Parlamentaria)
2505d58a41b7SNobutomo Nakano#
2506d58a41b7SNobutomo Nakano# There is also a list of the votes here:
2507d58a41b7SNobutomo Nakano# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html
2508d58a41b7SNobutomo Nakano#
2509d58a41b7SNobutomo Nakano# Our page:
2510b654b02dSYuri Pankov# https://www.timeanddate.com/news/time/north-mexico-dst-change.html
2511d58a41b7SNobutomo Nakano
2512d58a41b7SNobutomo Nakano# From Arthur David Olson (2010-01-20):
2513d58a41b7SNobutomo Nakano# The page
2514d58a41b7SNobutomo Nakano# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010
2515d58a41b7SNobutomo Nakano# includes this text:
2516d58a41b7SNobutomo Nakano# En los municipios fronterizos de Tijuana y Mexicali en Baja California;
25176f8e8937SDan McDonald# Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila;
25186f8e8937SDan McDonald# Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en
25196f8e8937SDan McDonald# Tamaulipas, la aplicación de este horario estacional surtirá efecto
25206f8e8937SDan McDonald# desde las dos horas del segundo domingo de marzo y concluirá a las dos
2521d58a41b7SNobutomo Nakano# horas del primer domingo de noviembre.
2522d58a41b7SNobutomo Nakano# En los municipios fronterizos que se encuentren ubicados en la franja
25236f8e8937SDan McDonald# fronteriza norte en el territorio comprendido entre la línea
25246f8e8937SDan McDonald# internacional y la línea paralela ubicada a una distancia de veinte
25256f8e8937SDan McDonald# kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el
25266f8e8937SDan McDonald# interior del país, la aplicación de este horario estacional surtirá
25276f8e8937SDan McDonald# efecto desde las dos horas del segundo domingo de marzo y concluirá a
2528d58a41b7SNobutomo Nakano# las dos horas del primer domingo de noviembre.
2529d58a41b7SNobutomo Nakano
253000973057SDan McDonald# From Steffen Thorsen (2014-12-08), translated by Gwillim Law:
253100973057SDan McDonald# The Mexican state of Quintana Roo will likely change to EST in 2015.
253200973057SDan McDonald#
253300973057SDan McDonald# http://www.unioncancun.mx/articulo/2014/12/04/medio-ambiente/congreso-aprueba-una-hora-mas-de-sol-en-qroo
253400973057SDan McDonald# "With this change, the time conflict that has existed between the municipios
253500973057SDan McDonald# of Quintana Roo and the municipio of Felipe Carrillo Puerto may come to an
253600973057SDan McDonald# end. The latter declared itself in rebellion 15 years ago when a time change
253700973057SDan McDonald# was initiated in Mexico, and since then it has refused to change its time
253800973057SDan McDonald# zone along with the rest of the country."
253900973057SDan McDonald#
254000973057SDan McDonald# From Steffen Thorsen (2015-01-14), translated by Gwillim Law:
254100973057SDan McDonald# http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.html
254200973057SDan McDonald# "...the new time zone will come into effect at two o'clock on the first Sunday
254300973057SDan McDonald# of February, when we will have to advance the clock one hour from its current
254400973057SDan McDonald# time..."
254500973057SDan McDonald# Also, the new zone will not use DST.
254656b82ca8SDan McDonald#
254756b82ca8SDan McDonald# From Carlos Raúl Perasso (2015-02-02):
254856b82ca8SDan McDonald# The decree that modifies the Mexican Hour System Law has finally
254956b82ca8SDan McDonald# been published at the Diario Oficial de la Federación
255056b82ca8SDan McDonald# http://www.dof.gob.mx/nota_detalle.php?codigo=5380123&fecha=31/01/2015
255156b82ca8SDan McDonald# It establishes 5 zones for Mexico:
255256b82ca8SDan McDonald# 1- Zona Centro (Central Zone): Corresponds to longitude 90 W,
255356b82ca8SDan McDonald#    includes most of Mexico, excluding what's mentioned below.
255456b82ca8SDan McDonald# 2- Zona Pacífico (Pacific Zone): Longitude 105 W, includes the
255556b82ca8SDan McDonald#    states of Baja California Sur; Chihuahua; Nayarit (excluding Bahía
255656b82ca8SDan McDonald#    de Banderas which lies in Central Zone); Sinaloa and Sonora.
255756b82ca8SDan McDonald# 3- Zona Noroeste (Northwest Zone): Longitude 120 W, includes the
255856b82ca8SDan McDonald#    state of Baja California.
255956b82ca8SDan McDonald# 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state
256056b82ca8SDan McDonald#    of Quintana Roo.
256156b82ca8SDan McDonald# 5- The islands, reefs and keys shall take their timezone from the
256256b82ca8SDan McDonald#    longitude they are located at.
256300973057SDan McDonald
2564f117aa50SRobert Mustacchi# From Paul Eggert (2022-10-28):
2565f117aa50SRobert Mustacchi# The new Mexican law was published today:
2566f117aa50SRobert Mustacchi# https://www.dof.gob.mx/nota_detalle.php?codigo=5670045&fecha=28/10/2022
2567f117aa50SRobert Mustacchi# This abolishes DST except where US DST rules are observed,
2568f117aa50SRobert Mustacchi# and in addition changes all of Chihuahua to -06 with no DST.
2569f117aa50SRobert Mustacchi
2570af2e290bSAndy Fiddaman# From Heitor David Pinto (2022-11-28):
2571af2e290bSAndy Fiddaman# Now the northern [municipios] want to have the same time zone as the
2572af2e290bSAndy Fiddaman# respective neighboring cities in the US, for example Juárez in UTC-7 with
2573af2e290bSAndy Fiddaman# DST, matching El Paso, and Ojinaga in UTC-6 with DST, matching Presidio....
2574af2e290bSAndy Fiddaman# the president authorized the publication of the decree for November 29,
2575af2e290bSAndy Fiddaman# so the time change would occur on November 30 at 0:00.
2576af2e290bSAndy Fiddaman# http://puentelibre.mx/noticia/ciudad_juarez_cambio_horario_noviembre_2022/
2577af2e290bSAndy Fiddaman
2578f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
2579f117aa50SRobert MustacchiRule	Mexico	1931	only	-	May	1	23:00	1:00	D
2580f117aa50SRobert MustacchiRule	Mexico	1931	only	-	Oct	1	0:00	0	S
25817c478bd9Sstevel@tonic-gateRule	Mexico	1939	only	-	Feb	5	0:00	1:00	D
25827c478bd9Sstevel@tonic-gateRule	Mexico	1939	only	-	Jun	25	0:00	0	S
25837c478bd9Sstevel@tonic-gateRule	Mexico	1940	only	-	Dec	9	0:00	1:00	D
25847c478bd9Sstevel@tonic-gateRule	Mexico	1941	only	-	Apr	1	0:00	0	S
25857c478bd9Sstevel@tonic-gateRule	Mexico	1943	only	-	Dec	16	0:00	1:00	W # War
25867c478bd9Sstevel@tonic-gateRule	Mexico	1944	only	-	May	1	0:00	0	S
25877c478bd9Sstevel@tonic-gateRule	Mexico	1950	only	-	Feb	12	0:00	1:00	D
25887c478bd9Sstevel@tonic-gateRule	Mexico	1950	only	-	Jul	30	0:00	0	S
25897c478bd9Sstevel@tonic-gateRule	Mexico	1996	2000	-	Apr	Sun>=1	2:00	1:00	D
25907c478bd9Sstevel@tonic-gateRule	Mexico	1996	2000	-	Oct	lastSun	2:00	0	S
25917c478bd9Sstevel@tonic-gateRule	Mexico	2001	only	-	May	Sun>=1	2:00	1:00	D
25927c478bd9Sstevel@tonic-gateRule	Mexico	2001	only	-	Sep	lastSun	2:00	0	S
2593f117aa50SRobert MustacchiRule	Mexico	2002	2022	-	Apr	Sun>=1	2:00	1:00	D
2594f117aa50SRobert MustacchiRule	Mexico	2002	2022	-	Oct	lastSun	2:00	0	S
2595374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
25966f8e8937SDan McDonald# Quintana Roo; represented by Cancún
2597f117aa50SRobert MustacchiZone America/Cancun	-5:47:04 -	LMT	1922 Jan  1  6:00u
25987c478bd9Sstevel@tonic-gate			-6:00	-	CST	1981 Dec 23
25997c478bd9Sstevel@tonic-gate			-5:00	Mexico	E%sT	1998 Aug  2  2:00
260000973057SDan McDonald			-6:00	Mexico	C%sT	2015 Feb  1  2:00
260100973057SDan McDonald			-5:00	-	EST
26026f8e8937SDan McDonald# Campeche, Yucatán; represented by Mérida
2603f117aa50SRobert MustacchiZone America/Merida	-5:58:28 -	LMT	1922 Jan  1  6:00u
26047c478bd9Sstevel@tonic-gate			-6:00	-	CST	1981 Dec 23
26057c478bd9Sstevel@tonic-gate			-5:00	-	EST	1982 Dec  2
26067c478bd9Sstevel@tonic-gate			-6:00	Mexico	C%sT
2607f63cc156SDan McDonald# Coahuila, Nuevo León, Tamaulipas (near US border)
2608af2e290bSAndy Fiddaman# This includes the following municipios:
2609af2e290bSAndy Fiddaman#   in Coahuila: Acuña, Allende, Guerrero, Hidalgo, Jiménez, Morelos, Nava,
2610af2e290bSAndy Fiddaman#     Ocampo, Piedras Negras, Villa Unión, Zaragoza
2611af2e290bSAndy Fiddaman#   in Nuevo León: Anáhuac
2612c2d5ab87SDan McDonald#   in Tamaulipas: Nuevo Laredo, Guerrero, Mier, Miguel Alemán, Camargo,
2613c2d5ab87SDan McDonald#     Gustavo Díaz Ordaz, Reynosa, Río Bravo, Valle Hermoso, Matamoros.
2614af2e290bSAndy Fiddaman# https://www.dof.gob.mx/nota_detalle.php?codigo=5670045&fecha=28/10/2022
2615f117aa50SRobert MustacchiZone America/Matamoros	-6:30:00 -	LMT	1922 Jan  1  6:00u
2616d58a41b7SNobutomo Nakano			-6:00	-	CST	1988
2617d58a41b7SNobutomo Nakano			-6:00	US	C%sT	1989
2618d58a41b7SNobutomo Nakano			-6:00	Mexico	C%sT	2010
2619d58a41b7SNobutomo Nakano			-6:00	US	C%sT
2620f63cc156SDan McDonald# Durango; Coahuila, Nuevo León, Tamaulipas (away from US border)
2621f117aa50SRobert MustacchiZone America/Monterrey	-6:41:16 -	LMT	1922 Jan  1  6:00u
26227c478bd9Sstevel@tonic-gate			-6:00	-	CST	1988
26237c478bd9Sstevel@tonic-gate			-6:00	US	C%sT	1989
26247c478bd9Sstevel@tonic-gate			-6:00	Mexico	C%sT
26257c478bd9Sstevel@tonic-gate# Central Mexico
2626f117aa50SRobert MustacchiZone America/Mexico_City -6:36:36 -	LMT	1922 Jan  1  7:00u
26277c478bd9Sstevel@tonic-gate			-7:00	-	MST	1927 Jun 10 23:00
26287c478bd9Sstevel@tonic-gate			-6:00	-	CST	1930 Nov 15
2629f117aa50SRobert Mustacchi			-7:00	Mexico	M%sT	1932 Apr  1
26306f8e8937SDan McDonald			-6:00	Mexico	C%sT	2001 Sep 30  2:00
26317c478bd9Sstevel@tonic-gate			-6:00	-	CST	2002 Feb 20
26327c478bd9Sstevel@tonic-gate			-6:00	Mexico	C%sT
2633af2e290bSAndy Fiddaman# Chihuahua (near US border - western side)
2634af2e290bSAndy Fiddaman# This includes the municipios of Janos, Ascensión, Juárez, Guadalupe, and
2635af2e290bSAndy Fiddaman# Práxedis G Guerrero.
2636af2e290bSAndy Fiddaman# http://gaceta.diputados.gob.mx/PDF/65/2a022/nov/20221124-VII.pdf
2637af2e290bSAndy FiddamanZone America/Ciudad_Juarez -7:05:56 -	LMT	1922 Jan  1  7:00u
2638af2e290bSAndy Fiddaman			-7:00	-	MST	1927 Jun 10 23:00
2639af2e290bSAndy Fiddaman			-6:00	-	CST	1930 Nov 15
2640af2e290bSAndy Fiddaman			-7:00	Mexico	M%sT	1932 Apr  1
2641af2e290bSAndy Fiddaman			-6:00	-	CST	1996
2642af2e290bSAndy Fiddaman			-6:00	Mexico	C%sT	1998
2643af2e290bSAndy Fiddaman			-6:00	-	CST	1998 Apr Sun>=1  3:00
2644af2e290bSAndy Fiddaman			-7:00	Mexico	M%sT	2010
2645af2e290bSAndy Fiddaman			-7:00	US	M%sT	2022 Oct 30  2:00
2646af2e290bSAndy Fiddaman			-6:00	-	CST	2022 Nov 30  0:00
2647af2e290bSAndy Fiddaman			-7:00	US	M%sT
2648af2e290bSAndy Fiddaman# Chihuahua (near US border - eastern side)
2649af2e290bSAndy Fiddaman# This includes the municipios of Coyame del Sotol, Ojinaga, and Manuel
2650af2e290bSAndy Fiddaman# Benavides.
2651af2e290bSAndy Fiddaman# http://gaceta.diputados.gob.mx/PDF/65/2a022/nov/20221124-VII.pdf
2652f117aa50SRobert MustacchiZone America/Ojinaga	-6:57:40 -	LMT	1922 Jan  1  7:00u
2653d58a41b7SNobutomo Nakano			-7:00	-	MST	1927 Jun 10 23:00
2654d58a41b7SNobutomo Nakano			-6:00	-	CST	1930 Nov 15
2655f117aa50SRobert Mustacchi			-7:00	Mexico	M%sT	1932 Apr  1
2656d58a41b7SNobutomo Nakano			-6:00	-	CST	1996
2657d58a41b7SNobutomo Nakano			-6:00	Mexico	C%sT	1998
26586f8e8937SDan McDonald			-6:00	-	CST	1998 Apr Sun>=1  3:00
2659d58a41b7SNobutomo Nakano			-7:00	Mexico	M%sT	2010
2660f117aa50SRobert Mustacchi			-7:00	US	M%sT	2022 Oct 30  2:00
2661af2e290bSAndy Fiddaman			-6:00	-	CST	2022 Nov 30  0:00
2662af2e290bSAndy Fiddaman			-6:00	US	C%sT
2663d58a41b7SNobutomo Nakano# Chihuahua (away from US border)
2664f117aa50SRobert MustacchiZone America/Chihuahua	-7:04:20 -	LMT	1922 Jan  1  7:00u
26657c478bd9Sstevel@tonic-gate			-7:00	-	MST	1927 Jun 10 23:00
26667c478bd9Sstevel@tonic-gate			-6:00	-	CST	1930 Nov 15
2667f117aa50SRobert Mustacchi			-7:00	Mexico	M%sT	1932 Apr  1
26687c478bd9Sstevel@tonic-gate			-6:00	-	CST	1996
26697c478bd9Sstevel@tonic-gate			-6:00	Mexico	C%sT	1998
26706f8e8937SDan McDonald			-6:00	-	CST	1998 Apr Sun>=1  3:00
2671f117aa50SRobert Mustacchi			-7:00	Mexico	M%sT	2022 Oct 30  2:00
2672f117aa50SRobert Mustacchi			-6:00	-	CST
26737c478bd9Sstevel@tonic-gate# Sonora
2674f117aa50SRobert MustacchiZone America/Hermosillo	-7:23:52 -	LMT	1922 Jan  1  7:00u
26757c478bd9Sstevel@tonic-gate			-7:00	-	MST	1927 Jun 10 23:00
26767c478bd9Sstevel@tonic-gate			-6:00	-	CST	1930 Nov 15
2677f117aa50SRobert Mustacchi			-7:00	Mexico	M%sT	1932 Apr  1
26787c478bd9Sstevel@tonic-gate			-6:00	-	CST	1942 Apr 24
26797c478bd9Sstevel@tonic-gate			-7:00	-	MST	1949 Jan 14
26807c478bd9Sstevel@tonic-gate			-8:00	-	PST	1970
26817c478bd9Sstevel@tonic-gate			-7:00	Mexico	M%sT	1999
26827c478bd9Sstevel@tonic-gate			-7:00	-	MST
268388c9c80dSNobutomo Nakano
2684af2e290bSAndy Fiddaman# Baja California Sur, Nayarit (except Bahía de Banderas), Sinaloa
2685af2e290bSAndy FiddamanZone America/Mazatlan	-7:05:40 -	LMT	1922 Jan  1  7:00u
2686af2e290bSAndy Fiddaman			-7:00	-	MST	1927 Jun 10 23:00
2687af2e290bSAndy Fiddaman			-6:00	-	CST	1930 Nov 15
2688af2e290bSAndy Fiddaman			-7:00	Mexico	M%sT	1932 Apr  1
2689af2e290bSAndy Fiddaman			-6:00	-	CST	1942 Apr 24
2690af2e290bSAndy Fiddaman			-7:00	-	MST	1949 Jan 14
2691af2e290bSAndy Fiddaman			-8:00	-	PST	1970
2692af2e290bSAndy Fiddaman			-7:00	Mexico	M%sT
2693af2e290bSAndy Fiddaman
2694af2e290bSAndy Fiddaman# Bahía de Banderas
2695af2e290bSAndy Fiddaman
269688c9c80dSNobutomo Nakano# From Alexander Krivenyshev (2010-04-21):
26976f8e8937SDan McDonald# According to news, Bahía de Banderas (Mexican state of Nayarit)
269888c9c80dSNobutomo Nakano# changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to
269988c9c80dSNobutomo Nakano# share the same time zone as nearby city Puerto Vallarta, Jalisco).
270088c9c80dSNobutomo Nakano#
270188c9c80dSNobutomo Nakano# (Spanish)
27026f8e8937SDan McDonald# Bahía de Banderas homologa su horario al del centro del
27036f8e8937SDan McDonald# país, a partir de este domingo
270488c9c80dSNobutomo Nakano# http://www.nayarit.gob.mx/notes.asp?id=20748
270588c9c80dSNobutomo Nakano#
27066f8e8937SDan McDonald# Bahía de Banderas homologa su horario con el del Centro del
27076f8e8937SDan McDonald# País
27086f8e8937SDan McDonald# http://www.bahiadebanderas.gob.mx/principal/index.php?option=com_content&view=article&id=261:bahia-de-banderas-homologa-su-horario-con-el-del-centro-del-pais&catid=42:comunicacion-social&Itemid=50
270988c9c80dSNobutomo Nakano#
271088c9c80dSNobutomo Nakano# (English)
27116f8e8937SDan McDonald# Puerto Vallarta and Bahía de Banderas: One Time Zone
271288c9c80dSNobutomo Nakano# http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml
271388c9c80dSNobutomo Nakano# http://www.worldtimezone.com/dst_news/dst_news_mexico08.html
271488c9c80dSNobutomo Nakano#
271588c9c80dSNobutomo Nakano# "Mexico's Senate approved the amendments to the Mexican Schedule System that
27166f8e8937SDan McDonald# will allow Bahía de Banderas and Puerto Vallarta to share the same time
271788c9c80dSNobutomo Nakano# zone ..."
27187c478bd9Sstevel@tonic-gate# Baja California Sur, Nayarit, Sinaloa
271988c9c80dSNobutomo Nakano
272088c9c80dSNobutomo Nakano# From Arthur David Olson (2010-05-01):
272188c9c80dSNobutomo Nakano# Use "Bahia_Banderas" to keep the name to fourteen characters.
272288c9c80dSNobutomo Nakano
2723f117aa50SRobert MustacchiZone America/Bahia_Banderas -7:01:00 -	LMT	1922 Jan  1  7:00u
272488c9c80dSNobutomo Nakano			-7:00	-	MST	1927 Jun 10 23:00
272588c9c80dSNobutomo Nakano			-6:00	-	CST	1930 Nov 15
2726f117aa50SRobert Mustacchi			-7:00	Mexico	M%sT	1932 Apr  1
272788c9c80dSNobutomo Nakano			-6:00	-	CST	1942 Apr 24
272888c9c80dSNobutomo Nakano			-7:00	-	MST	1949 Jan 14
272988c9c80dSNobutomo Nakano			-8:00	-	PST	1970
27306f8e8937SDan McDonald			-7:00	Mexico	M%sT	2010 Apr  4  2:00
273188c9c80dSNobutomo Nakano			-6:00	Mexico	C%sT
273288c9c80dSNobutomo Nakano
2733f63cc156SDan McDonald# Baja California
2734f117aa50SRobert MustacchiZone America/Tijuana	-7:48:04 -	LMT	1922 Jan  1  7:00u
27357c478bd9Sstevel@tonic-gate			-7:00	-	MST	1924
27367c478bd9Sstevel@tonic-gate			-8:00	-	PST	1927 Jun 10 23:00
27377c478bd9Sstevel@tonic-gate			-7:00	-	MST	1930 Nov 15
27387c478bd9Sstevel@tonic-gate			-8:00	-	PST	1931 Apr  1
27397c478bd9Sstevel@tonic-gate			-8:00	1:00	PDT	1931 Sep 30
27407c478bd9Sstevel@tonic-gate			-8:00	-	PST	1942 Apr 24
2741d58a41b7SNobutomo Nakano			-8:00	1:00	PWT	1945 Aug 14 23:00u
2742d58a41b7SNobutomo Nakano			-8:00	1:00	PPT	1945 Nov 12 # Peace
2743d58a41b7SNobutomo Nakano			-8:00	-	PST	1948 Apr  5
2744d58a41b7SNobutomo Nakano			-8:00	1:00	PDT	1949 Jan 14
2745d58a41b7SNobutomo Nakano			-8:00	-	PST	1954
2746d58a41b7SNobutomo Nakano			-8:00	CA	P%sT	1961
2747d58a41b7SNobutomo Nakano			-8:00	-	PST	1976
2748d58a41b7SNobutomo Nakano			-8:00	US	P%sT	1996
2749d58a41b7SNobutomo Nakano			-8:00	Mexico	P%sT	2001
2750d58a41b7SNobutomo Nakano			-8:00	US	P%sT	2002 Feb 20
2751d58a41b7SNobutomo Nakano			-8:00	Mexico	P%sT	2010
2752d58a41b7SNobutomo Nakano			-8:00	US	P%sT
27532f9aa4a7Srobbin# From Paul Eggert (2006-03-22):
27547c478bd9Sstevel@tonic-gate# Formerly there was an America/Ensenada zone, which differed from
27557c478bd9Sstevel@tonic-gate# America/Tijuana only in that it did not observe DST from 1976
27562f9aa4a7Srobbin# through 1995.  This was as per Shanks (1999).  But Shanks & Pottenger say
27572f9aa4a7Srobbin# Ensenada did not observe DST from 1948 through 1975.  Guy Harris reports
27586f8e8937SDan McDonald# that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and
27592f9aa4a7Srobbin# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that
27607c478bd9Sstevel@tonic-gate# DST-observance was a town-by-town matter back then.  This concerns
27617c478bd9Sstevel@tonic-gate# data after 1970 so most likely there should be at least one Zone
27627c478bd9Sstevel@tonic-gate# other than America/Tijuana for Baja, but it's not clear yet what its
27637c478bd9Sstevel@tonic-gate# name or contents should be.
27647c478bd9Sstevel@tonic-gate#
2765f63cc156SDan McDonald# From Paul Eggert (2015-10-08):
2766f63cc156SDan McDonald# Formerly there was an America/Santa_Isabel zone, but this appears to
2767f63cc156SDan McDonald# have come from a misreading of
2768f63cc156SDan McDonald# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010
2769f63cc156SDan McDonald# It has been moved to the 'backward' file.
2770f63cc156SDan McDonald#
2771f117aa50SRobert Mustacchi# From Paul Eggert (2022-10-28):
2772f117aa50SRobert Mustacchi# Today's new law states that the entire state of Baja California
2773f117aa50SRobert Mustacchi# follows US DST rules, which agrees with simplifications noted above.
2774f117aa50SRobert Mustacchi#
2775f63cc156SDan McDonald#
27767c478bd9Sstevel@tonic-gate# Revillagigedo Is
27777c478bd9Sstevel@tonic-gate# no information
27787c478bd9Sstevel@tonic-gate
27797c478bd9Sstevel@tonic-gate###############################################################################
27807c478bd9Sstevel@tonic-gate
27817c478bd9Sstevel@tonic-gate# Barbados
2782a43ba736SRobert Mustacchi
2783427b4c5cSAndy Fiddaman# For 1899 Milne gives -3:58:29.2.
2784a43ba736SRobert Mustacchi
278506965442SAndy Fiddaman# From P Chan (2020-12-09 and 2020-12-11):
278606965442SAndy Fiddaman# Standard time of GMT-4 was adopted in 1911.
278706965442SAndy Fiddaman# Definition of Time Act, 1911 (1911-7) [1911-08-28]
278806965442SAndy Fiddaman# 1912, Laws of Barbados (5 v.), OCLC Number: 919801291, Vol. 4, Image No. 522
278906965442SAndy Fiddaman# 1944, Laws of Barbados (5 v.), OCLC Number: 84548697, Vol. 4, Image No. 122
279006965442SAndy Fiddaman# http://llmc.com/browse.aspx?type=2&coll=85&div=297
279106965442SAndy Fiddaman#
279206965442SAndy Fiddaman# DST was observed in 1942-44.
279306965442SAndy Fiddaman# Defence (Daylight Saving) Regulations, 1942, 1942-04-13
279406965442SAndy Fiddaman# Defence (Daylight Saving) (Repeal) Regulations, 1942, 1942-08-22
279506965442SAndy Fiddaman# Defence (Daylight Saving) Regulations, 1943, 1943-04-16
279606965442SAndy Fiddaman# Defence (Daylight Saving) (Repeal) Regulations, 1943, 1943-09-01
279706965442SAndy Fiddaman# Defence (Daylight Saving) Regulations, 1944, 1944-03-21
279806965442SAndy Fiddaman# [Defence (Daylight Saving) (Amendment) Regulations 1944, 1944-03-28]
279906965442SAndy Fiddaman# Defence (Daylight Saving) (Repeal) Regulations, 1944, 1944-08-30
280006965442SAndy Fiddaman#
280106965442SAndy Fiddaman# 1914-, Subsidiary Legis., Annual Vols. OCLC Number: 226290591
280206965442SAndy Fiddaman# 1942: Image Nos. 527-528, 555-556
280306965442SAndy Fiddaman# 1943: Image Nos. 178-179, 198
280406965442SAndy Fiddaman# 1944: Image Nos. 113-115, 129
280506965442SAndy Fiddaman# http://llmc.com/titledescfull.aspx?type=2&coll=85&div=297&set=98437
280606965442SAndy Fiddaman#
280706965442SAndy Fiddaman# From Tim Parenti (2021-02-20):
280806965442SAndy Fiddaman# The transitions below are derived from P Chan's sources, except that the 1977
280906965442SAndy Fiddaman# through 1980 transitions are from Shanks & Pottenger since we have no better
281006965442SAndy Fiddaman# data there.  Of particular note, the 1944 DST regulation only advanced the
281106965442SAndy Fiddaman# time to "exactly three and a half hours later than Greenwich mean time", as
281206965442SAndy Fiddaman# opposed to "three hours" in the 1942 and 1943 regulations.
281306965442SAndy Fiddaman
2814f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
281506965442SAndy FiddamanRule	Barb	1942	only	-	Apr	19	5:00u	1:00	D
281606965442SAndy FiddamanRule	Barb	1942	only	-	Aug	31	6:00u	0	S
281706965442SAndy FiddamanRule	Barb	1943	only	-	May	 2	5:00u	1:00	D
281806965442SAndy FiddamanRule	Barb	1943	only	-	Sep	 5	6:00u	0	S
281906965442SAndy FiddamanRule	Barb	1944	only	-	Apr	10	5:00u	0:30	-
282006965442SAndy FiddamanRule	Barb	1944	only	-	Sep	10	6:00u	0	S
28217c478bd9Sstevel@tonic-gateRule	Barb	1977	only	-	Jun	12	2:00	1:00	D
28227c478bd9Sstevel@tonic-gateRule	Barb	1977	1978	-	Oct	Sun>=1	2:00	0	S
28237c478bd9Sstevel@tonic-gateRule	Barb	1978	1980	-	Apr	Sun>=15	2:00	1:00	D
28247c478bd9Sstevel@tonic-gateRule	Barb	1979	only	-	Sep	30	2:00	0	S
28257c478bd9Sstevel@tonic-gateRule	Barb	1980	only	-	Sep	25	2:00	0	S
2826374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
2827427b4c5cSAndy Fiddaman		#STDOFF	-3:58:29.2
282806965442SAndy FiddamanZone America/Barbados	-3:58:29 -	LMT	1911 Aug 28 # Bridgetown
282906965442SAndy Fiddaman			-4:00	Barb	A%sT	1944
283006965442SAndy Fiddaman			-4:00	Barb	AST/-0330 1945
28317c478bd9Sstevel@tonic-gate			-4:00	Barb	A%sT
28327c478bd9Sstevel@tonic-gate
28337c478bd9Sstevel@tonic-gate# Belize
2834f915e6d3SRobert Mustacchi
2835f915e6d3SRobert Mustacchi# From P Chan (2020-11-03):
2836f915e6d3SRobert Mustacchi# Below are some laws related to the time in British Honduras/Belize:
2837f915e6d3SRobert Mustacchi#
2838f915e6d3SRobert Mustacchi# Definition of Time Ordinance, 1927 (No.4 of 1927) [1927-04-01]
2839f915e6d3SRobert Mustacchi# Ordinances of British Honduras Passed in the Year 1927, p 19-20
2840f915e6d3SRobert Mustacchi# https://books.google.com/books?id=LqEpAQAAMAAJ&pg=RA3-PA19
2841f915e6d3SRobert Mustacchi#
2842f915e6d3SRobert Mustacchi# Definition of Time (Amendment) Ordinance, 1942 (No. 5 of 1942) [1942-06-27]
2843f915e6d3SRobert Mustacchi# Ordinances of British Honduras Passed in the Year 1942, p 31-32
2844f915e6d3SRobert Mustacchi# https://books.google.com/books?id=h6MpAQAAMAAJ&pg=RA6-PA95-IA44
2845f915e6d3SRobert Mustacchi#
2846f915e6d3SRobert Mustacchi# Definition of Time Ordinance, 1945 (No. 19 of 1945) [1945-12-15]
2847f915e6d3SRobert Mustacchi# Ordinances of British Honduras Passed in the Year 1945, p 49-50
2848f915e6d3SRobert Mustacchi# https://books.google.com/books?id=xaMpAQAAMAAJ&pg=RA2-PP1
2849f915e6d3SRobert Mustacchi#
2850f915e6d3SRobert Mustacchi# Definition of Time Ordinance, 1947 (No. 1 of 1947) [1947-03-11]
2851f915e6d3SRobert Mustacchi# Ordinances of British Honduras Passed in the Year 1947, p 1-2
2852f915e6d3SRobert Mustacchi# https://books.google.com/books?id=xaMpAQAAMAAJ&pg=RA3-PA1
2853f915e6d3SRobert Mustacchi#
2854f915e6d3SRobert Mustacchi# Time (Definition of) Ordinance  (Chapter 180)
2855f915e6d3SRobert Mustacchi# The Laws of British Honduras in Force on the 15th Day of September, 1958 , Volume IV, p 2580
2856f915e6d3SRobert Mustacchi# https://books.google.com/books?id=v5QpAQAAMAAJ&pg=PA2580
2857f915e6d3SRobert Mustacchi#
2858f915e6d3SRobert Mustacchi# Time (Definition of) (Amendment) Ordinance, 1968 (No. 13 of 1968) [1968-08-03]
2859f915e6d3SRobert Mustacchi# https://books.google.com/books?id=xij7KEB_58wC&pg=RA1-PA428-IA9
2860f915e6d3SRobert Mustacchi#
2861f915e6d3SRobert Mustacchi# Definition of Time Act (Chapter 339)
2862f915e6d3SRobert Mustacchi# Law of Belize, Revised Edition 2000
2863f915e6d3SRobert Mustacchi# http://www.belizelaw.org/web/lawadmin/PDF%20files/cap339.pdf
2864f915e6d3SRobert Mustacchi
2865f915e6d3SRobert Mustacchi# From Paul Eggert (2020-11-03):
2866f915e6d3SRobert Mustacchi# The transitions below are derived from P Chan's sources, except that the
2867f915e6d3SRobert Mustacchi# 1973 through 1983 transitions are from Shanks & Pottenger since we have
2868f915e6d3SRobert Mustacchi# no better data there.
2869f915e6d3SRobert Mustacchi
2870f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
2871f915e6d3SRobert MustacchiRule	Belize	1918	1941	-	Oct	Sat>=1	24:00	0:30	-0530
2872f915e6d3SRobert MustacchiRule	Belize	1919	1942	-	Feb	Sat>=8	24:00	0	CST
2873f915e6d3SRobert MustacchiRule	Belize	1942	only	-	Jun	27	24:00	1:00	CWT
2874f915e6d3SRobert MustacchiRule	Belize	1945	only	-	Aug	14	23:00u	1:00	CPT
2875f915e6d3SRobert MustacchiRule	Belize	1945	only	-	Dec	15	24:00	0	CST
2876f915e6d3SRobert MustacchiRule	Belize	1947	1967	-	Oct	Sat>=1	24:00	0:30	-0530
2877f915e6d3SRobert MustacchiRule	Belize	1948	1968	-	Feb	Sat>=8	24:00	0	CST
2878dafc4501SDan McDonaldRule	Belize	1973	only	-	Dec	 5	0:00	1:00	CDT
2879dafc4501SDan McDonaldRule	Belize	1974	only	-	Feb	 9	0:00	0	CST
2880dafc4501SDan McDonaldRule	Belize	1982	only	-	Dec	18	0:00	1:00	CDT
2881dafc4501SDan McDonaldRule	Belize	1983	only	-	Feb	12	0:00	0	CST
2882374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
2883f915e6d3SRobert MustacchiZone	America/Belize	-5:52:48 -	LMT	1912 Apr  1
2884dafc4501SDan McDonald			-6:00	Belize	%s
28857c478bd9Sstevel@tonic-gate
28867c478bd9Sstevel@tonic-gate# Bermuda
28872f9aa4a7Srobbin
2888427b4c5cSAndy Fiddaman# From Paul Eggert (2022-07-27):
2889a43ba736SRobert Mustacchi# For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower,
2890f915e6d3SRobert Mustacchi# Bermuda dockyard, Ireland I.  This agrees with standard offset given in the
2891427b4c5cSAndy Fiddaman# Daylight Saving Act, 1917 cited below.
2892f915e6d3SRobert Mustacchi# It is not known when this time became standard for Bermuda; guess 1890.
2893f915e6d3SRobert Mustacchi# The transition to -04 was specified by:
2894f915e6d3SRobert Mustacchi# 1930: The Time Zone Act, 1929 (1929: No. 39) [1929-11-08]
2895f915e6d3SRobert Mustacchi# https://books.google.com/books?id=7tdMAQAAIAAJ&pg=RA54-PP1
2896f915e6d3SRobert Mustacchi
2897f915e6d3SRobert Mustacchi# From P Chan (2020-11-20):
2898f915e6d3SRobert Mustacchi# Most of the information can be found online from the Bermuda National
2899f915e6d3SRobert Mustacchi# Library - Digital Collection which includes The Royal Gazette (RG) until 1957
2900f915e6d3SRobert Mustacchi# https://bnl.contentdm.oclc.org/digital/
2901f915e6d3SRobert Mustacchi# I will cite the ID.  For example, [10000] means
2902f915e6d3SRobert Mustacchi# https://bnl.contentdm.oclc.org/digital/collection/BermudaNP02/id/10000
2903f915e6d3SRobert Mustacchi#
2904f915e6d3SRobert Mustacchi# 1917: Apr 5 midnight to Sep 30 midnight
2905f915e6d3SRobert Mustacchi# Daylight Saving Act, 1917 (1917 No. 13) [1917-04-02]
2906f915e6d3SRobert Mustacchi# Bermuda Acts and Resolves 1917, p 37-38
2907f915e6d3SRobert Mustacchi# https://books.google.com/books?id=M-lCAQAAMAAJ&pg=PA36-IA2
2908f915e6d3SRobert Mustacchi# RG, 1917-04-04, p 6 [42340] gives the spring forward date.
2909f915e6d3SRobert Mustacchi#
2910f915e6d3SRobert Mustacchi# 1918: Apr 13 midnight to Sep 15 midnight
2911f915e6d3SRobert Mustacchi# Daylight Saving Act, 1918 (1918 No. 9) [1918-04-06]
2912f915e6d3SRobert Mustacchi# Bermuda Acts and Resolves 1917, p 13
2913f915e6d3SRobert Mustacchi# https://books.google.com/books?id=K-lCAQAAMAAJ&pg=RA1-PA7
2914f915e6d3SRobert Mustacchi#
2915f915e6d3SRobert Mustacchi# Note that local mean time was still used before 1930.
2916f915e6d3SRobert Mustacchi#
2917f915e6d3SRobert Mustacchi# During WWII, DST was introduced by Defence Regulations
2918f915e6d3SRobert Mustacchi# 1942: Jan 11 02:00 to Oct 18 02:00 [113646], [115726]
2919f915e6d3SRobert Mustacchi# 1943: Mar 21 02:00 to Oct 31 02:00 [116704], [118193]
2920f915e6d3SRobert Mustacchi# 1944: Mar 12 02:00 to Nov 5 02:00 [119225], [121593]
2921f915e6d3SRobert Mustacchi# 1945: Mar 11 02:00 to Nov 4 02:00 [122369], [124461]
2922f915e6d3SRobert Mustacchi# RG, 1942-01-08, p 2, 1942-10-12, p 2 , 1943-03-06, p 2, 1943-09-03, p 1,
2923f915e6d3SRobert Mustacchi# 1944-02-29, p 6, 1944-09-20, p 2, 1945-02-13, p 2, 1945-11-03, p 1
2924f915e6d3SRobert Mustacchi#
2925f915e6d3SRobert Mustacchi# In 1946, the House of Assembly rejected DST twice. [128686], [128076]
2926f915e6d3SRobert Mustacchi# RG, 1946-03-16 p 1,1946-04-13 p 1
2927f915e6d3SRobert Mustacchi#
2928f915e6d3SRobert Mustacchi# 1947: third Sunday in May 02:00 to second Sunday in September 02:00
2929f915e6d3SRobert Mustacchi# DST in 1947 was defined in the Daylight Saving Act, 1947 (1947: No. 12)
2930f915e6d3SRobert Mustacchi# which expired at the end of the year.  [125784] ,[132405], [144454], [138226]
2931f915e6d3SRobert Mustacchi# RG, 1947-02-27, p 1, 1947-05-15, p 1, 1947-09-13, p 1, 1947-12-30, p 1
2932f915e6d3SRobert Mustacchi#
2933f915e6d3SRobert Mustacchi# 1948-1952: fourth Sunday in May 02:00 to first Sunday in September 02:00
2934f915e6d3SRobert Mustacchi# DST in 1948 was defined in the Daylight Saving Act, 1948 (1948 : No. 12)
2935f915e6d3SRobert Mustacchi# which was set to expired at the end of the year but it was extended until
2936f915e6d3SRobert Mustacchi# the end of 1952 and was not further extended.
2937f915e6d3SRobert Mustacchi# [129802], [139403], [146008], [135240], [144330], [139049], [143309],
2938f915e6d3SRobert Mustacchi# [148271], [149773], [153589], [153802], [155924]
2939f915e6d3SRobert Mustacchi# RG, 1948-04-13, p 1, 1948-05-22, p 1, 1948-09-04, p 1, 1949-05-21, p1,
2940f915e6d3SRobert Mustacchi# 1949-09-03, p 1, 1950-05-27 p 1, 1950-09-02, p 1, 1951-05-27, p 1,
2941f915e6d3SRobert Mustacchi# 1951-09-01, p 1, 1952-05-23, p 1, 1952-09-26, p 1, 1952-12-21, p 8
2942f915e6d3SRobert Mustacchi#
2943f915e6d3SRobert Mustacchi# In 1953-1955, the House of Assembly rejected DST each year. [158996],
2944f915e6d3SRobert Mustacchi# [162620], [166720] RG, 1953-05-02, p 1, 1954-04-01 p 1, 1955-03-12, p 1
2945f915e6d3SRobert Mustacchi#
2946f915e6d3SRobert Mustacchi# 1956: fourth Sunday in May 02:00 to last Sunday in October 02:00
2947f915e6d3SRobert Mustacchi# Time Zone (Seasonal Variation) Act, 1956 (1956: No.44) [1956-05-25]
2948f915e6d3SRobert Mustacchi# Bermuda Public Acts 1956, p 331-332
2949f915e6d3SRobert Mustacchi# https://books.google.com/books?id=Xs1AlmD_cEwC&pg=PA63
2950f915e6d3SRobert Mustacchi#
2951f915e6d3SRobert Mustacchi# The extension of the Act was rejected by the House of Assembly. [176218]
2952f915e6d3SRobert Mustacchi# RG, 1956-12-13, p 1
2953f915e6d3SRobert Mustacchi#
2954f915e6d3SRobert Mustacchi# From the Chronological Table of Public and Private Acts up to 1985, it seems
2955f915e6d3SRobert Mustacchi# that there does not exist other Acts related to DST before 1973.
2956f915e6d3SRobert Mustacchi# https://books.google.com/books?id=r9hMAQAAIAAJ&pg=RA23-PA1
2957f915e6d3SRobert Mustacchi# Public Acts of the Legislature of the Islands of Bermuda, Together with
2958f915e6d3SRobert Mustacchi# Statutory Instruments in Force Thereunder, Vol VII
2959a43ba736SRobert Mustacchi
29602f9aa4a7Srobbin# From Dan Jones, reporting in The Royal Gazette (2006-06-26):
29612f9aa4a7Srobbin# Next year, however, clocks in the US will go forward on the second Sunday
29622f9aa4a7Srobbin# in March, until the first Sunday in November.  And, after the Time Zone
29632f9aa4a7Srobbin# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on
29642f9aa4a7Srobbin# Friday, the same thing will happen in Bermuda.
29652f9aa4a7Srobbin# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135
29662f9aa4a7Srobbin
2967f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
2968f915e6d3SRobert MustacchiRule	Bermuda	1917	only	-	Apr	 5	24:00	1:00	-
2969f915e6d3SRobert MustacchiRule	Bermuda	1917	only	-	Sep	30	24:00	0	-
2970f915e6d3SRobert MustacchiRule	Bermuda	1918	only	-	Apr	13	24:00	1:00	-
2971f915e6d3SRobert MustacchiRule	Bermuda	1918	only	-	Sep	15	24:00	0	S
2972f915e6d3SRobert MustacchiRule	Bermuda	1942	only	-	Jan	11	 2:00	1:00	D
2973f915e6d3SRobert MustacchiRule	Bermuda	1942	only	-	Oct	18	 2:00	0	S
2974f915e6d3SRobert MustacchiRule	Bermuda	1943	only	-	Mar	21	 2:00	1:00	D
2975f915e6d3SRobert MustacchiRule	Bermuda	1943	only	-	Oct	31	 2:00	0	S
2976f915e6d3SRobert MustacchiRule	Bermuda	1944	1945	-	Mar	Sun>=8	 2:00	1:00	D
2977f915e6d3SRobert MustacchiRule	Bermuda	1944	1945	-	Nov	Sun>=1	 2:00	0	S
2978f915e6d3SRobert MustacchiRule	Bermuda	1947	only	-	May	Sun>=15	 2:00	1:00	D
2979f915e6d3SRobert MustacchiRule	Bermuda	1947	only	-	Sep	Sun>=8	 2:00	0	S
2980f915e6d3SRobert MustacchiRule	Bermuda	1948	1952	-	May	Sun>=22	 2:00	1:00	D
2981f915e6d3SRobert MustacchiRule	Bermuda	1948	1952	-	Sep	Sun>=1	 2:00	0	S
2982f915e6d3SRobert MustacchiRule	Bermuda	1956	only	-	May	Sun>=22	 2:00	1:00	D
2983f915e6d3SRobert MustacchiRule	Bermuda	1956	only	-	Oct	lastSun	 2:00	0	S
2984f915e6d3SRobert Mustacchi
2985374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
2986427b4c5cSAndy Fiddaman		#STDOFF	-4:19:18.3
2987f915e6d3SRobert MustacchiZone Atlantic/Bermuda	-4:19:18 -	LMT	1890	# Hamilton
2988f915e6d3SRobert Mustacchi			-4:19:18 Bermuda BMT/BST 1930 Jan 1  2:00
2989f915e6d3SRobert Mustacchi			-4:00	Bermuda	A%sT	1974 Apr 28  2:00
2990a43ba736SRobert Mustacchi			-4:00	Canada	A%sT	1976
29912f9aa4a7Srobbin			-4:00	US	A%sT
29927c478bd9Sstevel@tonic-gate
29937c478bd9Sstevel@tonic-gate# Costa Rica
2994a43ba736SRobert Mustacchi
2995427b4c5cSAndy Fiddaman# Milne gives -5:36:13.3 as San José mean time.
2996a43ba736SRobert Mustacchi
2997f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
29987c478bd9Sstevel@tonic-gateRule	CR	1979	1980	-	Feb	lastSun	0:00	1:00	D
29997c478bd9Sstevel@tonic-gateRule	CR	1979	1980	-	Jun	Sun>=1	0:00	0	S
30007c478bd9Sstevel@tonic-gateRule	CR	1991	1992	-	Jan	Sat>=15	0:00	1:00	D
30012f9aa4a7Srobbin# IATA SSIM (1991-09) says the following was at 1:00;
30022f9aa4a7Srobbin# go with Shanks & Pottenger.
30037c478bd9Sstevel@tonic-gateRule	CR	1991	only	-	Jul	 1	0:00	0	S
30047c478bd9Sstevel@tonic-gateRule	CR	1992	only	-	Mar	15	0:00	0	S
30056f8e8937SDan McDonald# There are too many San Josés elsewhere, so we'll use 'Costa Rica'.
3006374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
3007427b4c5cSAndy Fiddaman		#STDOFF	-5:36:13.3
30086f8e8937SDan McDonaldZone America/Costa_Rica	-5:36:13 -	LMT	1890        # San José
30096f8e8937SDan McDonald			-5:36:13 -	SJMT	1921 Jan 15 # San José Mean Time
30107c478bd9Sstevel@tonic-gate			-6:00	CR	C%sT
30117c478bd9Sstevel@tonic-gate# Coco
30127c478bd9Sstevel@tonic-gate# no information; probably like America/Costa_Rica
30137c478bd9Sstevel@tonic-gate
30147c478bd9Sstevel@tonic-gate# Cuba
30157c478bd9Sstevel@tonic-gate
3016a43ba736SRobert Mustacchi# From Paul Eggert (2013-02-21):
3017a43ba736SRobert Mustacchi# Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57
3018a43ba736SRobert Mustacchi# for the port, and -5:30 for meteorological observations.
3019a43ba736SRobert Mustacchi# For now, stick with Shanks & Pottenger.
3020a43ba736SRobert Mustacchi
30217c478bd9Sstevel@tonic-gate# From Arthur David Olson (1999-03-29):
30227c478bd9Sstevel@tonic-gate# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between
30237c478bd9Sstevel@tonic-gate# the Cuban National Team and the Baltimore Orioles was carried live on
30247c478bd9Sstevel@tonic-gate# the Orioles Radio Network, including affiliate WTOP in Washington, DC.
30257c478bd9Sstevel@tonic-gate# During the game, play-by-play announcer Jim Hunter noted that
30267c478bd9Sstevel@tonic-gate# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving
30277c478bd9Sstevel@tonic-gate# Time today."  (The "two hour" remark referred to losing one hour of
30286f8e8937SDan McDonald# sleep on 1999-03-28 - when the announcers were in Cuba as it switched
30296f8e8937SDan McDonald# to DST - and one more hour on 1999-04-04 - when the announcers will have
30307c478bd9Sstevel@tonic-gate# returned to Baltimore, which switches on that date.)
30317c478bd9Sstevel@tonic-gate
3032a43ba736SRobert Mustacchi# From Steffen Thorsen (2013-11-11):
3033a43ba736SRobert Mustacchi# DST start in Cuba in 2004 ... does not follow the same rules as the
3034a43ba736SRobert Mustacchi# years before.  The correct date should be Sunday 2004-03-28 00:00 ...
3035a43ba736SRobert Mustacchi# https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html
3036a43ba736SRobert Mustacchi
30377c478bd9Sstevel@tonic-gate# From Evert van der Veer via Steffen Thorsen (2004-10-28):
30387c478bd9Sstevel@tonic-gate# Cuba is not going back to standard time this year.
30392f9aa4a7Srobbin# From Paul Eggert (2006-03-22):
30407c478bd9Sstevel@tonic-gate# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html
30417c478bd9Sstevel@tonic-gate# says that it's due to a problem at the Antonio Guiteras
30427c478bd9Sstevel@tonic-gate# thermoelectric plant, and says "This October there will be no return
30437c478bd9Sstevel@tonic-gate# to normal hours (after daylight saving time)".
30442f9aa4a7Srobbin# For now, let's assume that it's a temporary measure.
30457c478bd9Sstevel@tonic-gate
304680868c53Srobbin# From Carlos A. Carnero Delgado (2005-11-12):
304780868c53Srobbin# This year (just like in 2004-2005) there's no change in time zone
304880868c53Srobbin# adjustment in Cuba.  We will stay in daylight saving time:
304980868c53Srobbin# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html
305080868c53Srobbin
30516f8e8937SDan McDonald# From Jesper Nørgaard Welen (2006-10-21):
3052150c1068Srobbin# An article in GRANMA INTERNACIONAL claims that Cuba will end
3053150c1068Srobbin# the 3 years of permanent DST next weekend, see
3054150c1068Srobbin# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html
3055150c1068Srobbin# "On Saturday night, October 28 going into Sunday, October 29, at 01:00,
30566f8e8937SDan McDonald# watches should be set back one hour - going back to 00:00 hours - returning
3057150c1068Srobbin# to the normal schedule....
30582f9aa4a7Srobbin
3059a68d064cSrobbin# From Paul Eggert (2007-03-02):
30606f8e8937SDan McDonald# <http://www.granma.cubaweb.cu/english/news/art89.html>, dated yesterday,
3061a68d064cSrobbin# says Cuban clocks will advance at midnight on March 10.
3062a68d064cSrobbin# For lack of better information, assume Cuba will use US rules,
3063a68d064cSrobbin# except that it switches at midnight standard time as usual.
306417d9c33fSrobbin#
306517d9c33fSrobbin# From Steffen Thorsen (2007-10-25):
3066a43ba736SRobert Mustacchi# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week
306717d9c33fSrobbin# earlier - on the last Sunday of October, just like in 2006.
3068a43ba736SRobert Mustacchi#
306917d9c33fSrobbin# He supplied these references:
3070a43ba736SRobert Mustacchi#
3071af2e290bSAndy Fiddaman# http://www.prensalatina.com.mx/article.asp?ID={4CC32C1B-A9F7-42FB-8A07-8631AFC923AF}&language=ES
307217d9c33fSrobbin# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm
3073a43ba736SRobert Mustacchi#
30746f8e8937SDan McDonald# From Alex Krivenyshev (2007-10-25):
307517d9c33fSrobbin# Here is also article from Granma (Cuba):
3076a43ba736SRobert Mustacchi#
30776f8e8937SDan McDonald# Regirá el Horario Normal desde el próximo domingo 28 de octubre
307817d9c33fSrobbin# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html
3079a43ba736SRobert Mustacchi#
308017d9c33fSrobbin# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html
3081a68d064cSrobbin
30828593320bSrobbin# From Arthur David Olson (2008-03-09):
30838593320bSrobbin# I'm in Maryland which is now observing United States Eastern Daylight
30848593320bSrobbin# Time. At 9:44 local time I used RealPlayer to listen to
30858593320bSrobbin# http://media.enet.cu/radioreloj
30866f8e8937SDan McDonald# a Cuban information station, and heard
30878593320bSrobbin# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"),
30888593320bSrobbin# indicating that Cuba is still on standard time.
30898593320bSrobbin
30908593320bSrobbin# From Steffen Thorsen (2008-03-12):
30918593320bSrobbin# It seems that Cuba will start DST on Sunday, 2007-03-16...
30928593320bSrobbin# It was announced yesterday, according to this source (in Spanish):
30938593320bSrobbin# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm
30948593320bSrobbin#
30958593320bSrobbin# Some more background information is posted here:
3096b654b02dSYuri Pankov# https://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html
30978593320bSrobbin#
30988593320bSrobbin# The article also says that Cuba has been observing DST since 1963,
30998593320bSrobbin# while Shanks (and tzdata) has 1965 as the first date (except in the
31008593320bSrobbin# 1940's). Many other web pages in Cuba also claim that it has been
31018593320bSrobbin# observed since 1963, but with the exception of 1970 - an exception
31028593320bSrobbin# which is not present in tzdata/Shanks. So there is a chance we need to
31038593320bSrobbin# change some historic records as well.
31048593320bSrobbin#
31058593320bSrobbin# One example:
31068593320bSrobbin# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm
31078593320bSrobbin
31086f8e8937SDan McDonald# From Jesper Nørgaard Welen (2008-03-13):
31098593320bSrobbin# The Cuban time change has just been confirmed on the most authoritative
31108593320bSrobbin# web site, the Granma.  Please check out
31118593320bSrobbin# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html
31128593320bSrobbin#
31136f8e8937SDan McDonald# Basically as expected after Steffen Thorsen's information, the change
31148593320bSrobbin# will take place midnight between Saturday and Sunday.
31158593320bSrobbin
31168593320bSrobbin# From Arthur David Olson (2008-03-12):
31178593320bSrobbin# Assume Sun>=15 (third Sunday) going forward.
31188593320bSrobbin
311910355008SNobutomo Nakano# From Alexander Krivenyshev (2009-03-04)
312010355008SNobutomo Nakano# According to the Radio Reloj - Cuba will start Daylight Saving Time on
312110355008SNobutomo Nakano# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009-
312210355008SNobutomo Nakano# not on midnight March 14 / March 15 as previously thought.
312310355008SNobutomo Nakano#
312410355008SNobutomo Nakano# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html
312510355008SNobutomo Nakano# (in Spanish)
312610355008SNobutomo Nakano
312710355008SNobutomo Nakano# From Arthur David Olson (2009-03-09)
312810355008SNobutomo Nakano# I listened over the Internet to
312910355008SNobutomo Nakano# http://media.enet.cu/readioreloj
313010355008SNobutomo Nakano# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the
31316f8e8937SDan McDonald# the time was announced as "diez cinco" - the same time as here, indicating
313210355008SNobutomo Nakano# that has indeed switched to DST. Assume second Sunday from 2009 forward.
313310355008SNobutomo Nakano
3134abaa65c8SYuri Pankov# From Steffen Thorsen (2011-03-08):
3135abaa65c8SYuri Pankov# Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00
3136abaa65c8SYuri Pankov# this year. Nothing about the end date known so far (if that has
3137abaa65c8SYuri Pankov# changed at all).
3138abaa65c8SYuri Pankov#
3139abaa65c8SYuri Pankov# Source:
3140abaa65c8SYuri Pankov# http://granma.co.cu/2011/03/08/nacional/artic01.html
3141abaa65c8SYuri Pankov#
3142abaa65c8SYuri Pankov# Our info:
3143b654b02dSYuri Pankov# https://www.timeanddate.com/news/time/cuba-starts-dst-2011.html
3144a43ba736SRobert Mustacchi#
3145a43ba736SRobert Mustacchi# From Steffen Thorsen (2011-10-30)
3146a43ba736SRobert Mustacchi# Cuba will end DST two weeks later this year. Instead of going back
3147a43ba736SRobert Mustacchi# tonight, it has been delayed to 2011-11-13 at 01:00.
3148a43ba736SRobert Mustacchi#
3149a43ba736SRobert Mustacchi# One source (Spanish)
3150a43ba736SRobert Mustacchi# http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html
3151a43ba736SRobert Mustacchi#
3152a43ba736SRobert Mustacchi# Our page:
3153b654b02dSYuri Pankov# https://www.timeanddate.com/news/time/cuba-time-changes-2011.html
3154a43ba736SRobert Mustacchi#
3155a43ba736SRobert Mustacchi# From Steffen Thorsen (2012-03-01)
3156a43ba736SRobert Mustacchi# According to Radio Reloj, Cuba will start DST on Midnight between March
3157a43ba736SRobert Mustacchi# 31 and April 1.
3158a43ba736SRobert Mustacchi#
3159a43ba736SRobert Mustacchi# Radio Reloj has the following info (Spanish):
3160a43ba736SRobert Mustacchi# http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril
3161a43ba736SRobert Mustacchi#
3162a43ba736SRobert Mustacchi# Our info on it:
3163b654b02dSYuri Pankov# https://www.timeanddate.com/news/time/cuba-starts-dst-2012.html
3164a43ba736SRobert Mustacchi
3165a43ba736SRobert Mustacchi# From Steffen Thorsen (2012-11-03):
3166a43ba736SRobert Mustacchi# Radio Reloj and many other sources report that Cuba is changing back
3167a43ba736SRobert Mustacchi# to standard time on 2012-11-04:
3168a43ba736SRobert Mustacchi# http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre
3169a43ba736SRobert Mustacchi# From Paul Eggert (2012-11-03):
3170a43ba736SRobert Mustacchi# For now, assume the future rule is first Sunday in November.
3171abaa65c8SYuri Pankov
3172f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
31737c478bd9Sstevel@tonic-gateRule	Cuba	1928	only	-	Jun	10	0:00	1:00	D
31747c478bd9Sstevel@tonic-gateRule	Cuba	1928	only	-	Oct	10	0:00	0	S
31757c478bd9Sstevel@tonic-gateRule	Cuba	1940	1942	-	Jun	Sun>=1	0:00	1:00	D
31767c478bd9Sstevel@tonic-gateRule	Cuba	1940	1942	-	Sep	Sun>=1	0:00	0	S
31777c478bd9Sstevel@tonic-gateRule	Cuba	1945	1946	-	Jun	Sun>=1	0:00	1:00	D
31787c478bd9Sstevel@tonic-gateRule	Cuba	1945	1946	-	Sep	Sun>=1	0:00	0	S
31797c478bd9Sstevel@tonic-gateRule	Cuba	1965	only	-	Jun	1	0:00	1:00	D
31807c478bd9Sstevel@tonic-gateRule	Cuba	1965	only	-	Sep	30	0:00	0	S
31817c478bd9Sstevel@tonic-gateRule	Cuba	1966	only	-	May	29	0:00	1:00	D
31827c478bd9Sstevel@tonic-gateRule	Cuba	1966	only	-	Oct	2	0:00	0	S
31837c478bd9Sstevel@tonic-gateRule	Cuba	1967	only	-	Apr	8	0:00	1:00	D
31847c478bd9Sstevel@tonic-gateRule	Cuba	1967	1968	-	Sep	Sun>=8	0:00	0	S
31857c478bd9Sstevel@tonic-gateRule	Cuba	1968	only	-	Apr	14	0:00	1:00	D
31867c478bd9Sstevel@tonic-gateRule	Cuba	1969	1977	-	Apr	lastSun	0:00	1:00	D
31877c478bd9Sstevel@tonic-gateRule	Cuba	1969	1971	-	Oct	lastSun	0:00	0	S
31887c478bd9Sstevel@tonic-gateRule	Cuba	1972	1974	-	Oct	8	0:00	0	S
31897c478bd9Sstevel@tonic-gateRule	Cuba	1975	1977	-	Oct	lastSun	0:00	0	S
31907c478bd9Sstevel@tonic-gateRule	Cuba	1978	only	-	May	7	0:00	1:00	D
31917c478bd9Sstevel@tonic-gateRule	Cuba	1978	1990	-	Oct	Sun>=8	0:00	0	S
31927c478bd9Sstevel@tonic-gateRule	Cuba	1979	1980	-	Mar	Sun>=15	0:00	1:00	D
31937c478bd9Sstevel@tonic-gateRule	Cuba	1981	1985	-	May	Sun>=5	0:00	1:00	D
31947c478bd9Sstevel@tonic-gateRule	Cuba	1986	1989	-	Mar	Sun>=14	0:00	1:00	D
31957c478bd9Sstevel@tonic-gateRule	Cuba	1990	1997	-	Apr	Sun>=1	0:00	1:00	D
31967c478bd9Sstevel@tonic-gateRule	Cuba	1991	1995	-	Oct	Sun>=8	0:00s	0	S
31977c478bd9Sstevel@tonic-gateRule	Cuba	1996	only	-	Oct	 6	0:00s	0	S
31987c478bd9Sstevel@tonic-gateRule	Cuba	1997	only	-	Oct	12	0:00s	0	S
31997c478bd9Sstevel@tonic-gateRule	Cuba	1998	1999	-	Mar	lastSun	0:00s	1:00	D
32007c478bd9Sstevel@tonic-gateRule	Cuba	1998	2003	-	Oct	lastSun	0:00s	0	S
3201a43ba736SRobert MustacchiRule	Cuba	2000	2003	-	Apr	Sun>=1	0:00s	1:00	D
3202a43ba736SRobert MustacchiRule	Cuba	2004	only	-	Mar	lastSun	0:00s	1:00	D
3203a43ba736SRobert MustacchiRule	Cuba	2006	2010	-	Oct	lastSun	0:00s	0	S
32048593320bSrobbinRule	Cuba	2007	only	-	Mar	Sun>=8	0:00s	1:00	D
320510355008SNobutomo NakanoRule	Cuba	2008	only	-	Mar	Sun>=15	0:00s	1:00	D
3206abaa65c8SYuri PankovRule	Cuba	2009	2010	-	Mar	Sun>=8	0:00s	1:00	D
3207abaa65c8SYuri PankovRule	Cuba	2011	only	-	Mar	Sun>=15	0:00s	1:00	D
3208a43ba736SRobert MustacchiRule	Cuba	2011	only	-	Nov	13	0:00s	0	S
3209a43ba736SRobert MustacchiRule	Cuba	2012	only	-	Apr	1	0:00s	1:00	D
3210a43ba736SRobert MustacchiRule	Cuba	2012	max	-	Nov	Sun>=1	0:00s	0	S
3211a43ba736SRobert MustacchiRule	Cuba	2013	max	-	Mar	Sun>=8	0:00s	1:00	D
32127c478bd9Sstevel@tonic-gate
3213374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
32147c478bd9Sstevel@tonic-gateZone	America/Havana	-5:29:28 -	LMT	1890
32157c478bd9Sstevel@tonic-gate			-5:29:36 -	HMT	1925 Jul 19 12:00 # Havana MT
32167c478bd9Sstevel@tonic-gate			-5:00	Cuba	C%sT
32177c478bd9Sstevel@tonic-gate
32187c478bd9Sstevel@tonic-gate# Dominican Republic
32197c478bd9Sstevel@tonic-gate
32207c478bd9Sstevel@tonic-gate# From Steffen Thorsen (2000-10-30):
32217c478bd9Sstevel@tonic-gate# Enrique Morales reported to me that the Dominican Republic has changed the
32227c478bd9Sstevel@tonic-gate# time zone to Eastern Standard Time as of Sunday 29 at 2 am....
32237c478bd9Sstevel@tonic-gate# http://www.listin.com.do/antes/261000/republica/princi.html
32247c478bd9Sstevel@tonic-gate
32257c478bd9Sstevel@tonic-gate# From Paul Eggert (2000-12-04):
32267c478bd9Sstevel@tonic-gate# That URL (2000-10-26, in Spanish) says they planned to use US-style DST.
32277c478bd9Sstevel@tonic-gate
32287c478bd9Sstevel@tonic-gate# From Rives McDow (2000-12-01):
32297c478bd9Sstevel@tonic-gate# Dominican Republic changed its mind and presidential decree on Tuesday,
32307c478bd9Sstevel@tonic-gate# November 28, 2000, with a new decree.  On Sunday, December 3 at 1:00 AM the
32317c478bd9Sstevel@tonic-gate# Dominican Republic will be reverting to 8 hours from the International Date
32327c478bd9Sstevel@tonic-gate# Line, and will not be using DST in the foreseeable future.  The reason they
32337c478bd9Sstevel@tonic-gate# decided to use DST was to be in synch with Puerto Rico, who was also going
32347c478bd9Sstevel@tonic-gate# to implement DST.  When Puerto Rico didn't implement DST, the president
32357c478bd9Sstevel@tonic-gate# decided to revert.
32367c478bd9Sstevel@tonic-gate
32377c478bd9Sstevel@tonic-gate
3238f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
3239dafc4501SDan McDonaldRule	DR	1966	only	-	Oct	30	0:00	1:00	EDT
3240dafc4501SDan McDonaldRule	DR	1967	only	-	Feb	28	0:00	0	EST
3241dafc4501SDan McDonaldRule	DR	1969	1973	-	Oct	lastSun	0:00	0:30	-0430
3242dafc4501SDan McDonaldRule	DR	1970	only	-	Feb	21	0:00	0	EST
3243dafc4501SDan McDonaldRule	DR	1971	only	-	Jan	20	0:00	0	EST
3244dafc4501SDan McDonaldRule	DR	1972	1974	-	Jan	21	0:00	0	EST
3245374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
32467c478bd9Sstevel@tonic-gateZone America/Santo_Domingo -4:39:36 -	LMT	1890
32477c478bd9Sstevel@tonic-gate			-4:40	-	SDMT	1933 Apr  1 12:00 # S. Dom. MT
3248dafc4501SDan McDonald			-5:00	DR	%s	1974 Oct 27
32496f8e8937SDan McDonald			-4:00	-	AST	2000 Oct 29  2:00
32506f8e8937SDan McDonald			-5:00	US	E%sT	2000 Dec  3  1:00
32517c478bd9Sstevel@tonic-gate			-4:00	-	AST
32527c478bd9Sstevel@tonic-gate
32537c478bd9Sstevel@tonic-gate# El Salvador
32542f9aa4a7Srobbin
3255f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
32567c478bd9Sstevel@tonic-gateRule	Salv	1987	1988	-	May	Sun>=1	0:00	1:00	D
32577c478bd9Sstevel@tonic-gateRule	Salv	1987	1988	-	Sep	lastSun	0:00	0	S
32587c478bd9Sstevel@tonic-gate# There are too many San Salvadors elsewhere, so use America/El_Salvador
32597c478bd9Sstevel@tonic-gate# instead of America/San_Salvador.
3260374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
32616f8e8937SDan McDonaldZone America/El_Salvador -5:56:48 -	LMT	1921 # San Salvador
32627c478bd9Sstevel@tonic-gate			-6:00	Salv	C%sT
32637c478bd9Sstevel@tonic-gate
32647c478bd9Sstevel@tonic-gate# Guatemala
32652f9aa4a7Srobbin#
32662f9aa4a7Srobbin# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen:
32672f9aa4a7Srobbin# Diario Co Latino, at
32686f8e8937SDan McDonald# <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>,
32692f9aa4a7Srobbin# says in an article dated 2006-04-19 that the Guatemalan government had
32702f9aa4a7Srobbin# decided on that date to advance official time by 60 minutes, to lessen the
32712f9aa4a7Srobbin# impact of the elevated cost of oil....  Daylight saving time will last from
32722f9aa4a7Srobbin# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified).
32732f9aa4a7Srobbin# From Paul Eggert (2006-06-22):
32742f9aa4a7Srobbin# The Ministry of Energy and Mines, press release CP-15/2006
32752f9aa4a7Srobbin# (2006-04-19), says DST ends at 24:00.  See
32766f8e8937SDan McDonald# http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf
32772f9aa4a7Srobbin
3278f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
32797c478bd9Sstevel@tonic-gateRule	Guat	1973	only	-	Nov	25	0:00	1:00	D
32807c478bd9Sstevel@tonic-gateRule	Guat	1974	only	-	Feb	24	0:00	0	S
32817c478bd9Sstevel@tonic-gateRule	Guat	1983	only	-	May	21	0:00	1:00	D
32827c478bd9Sstevel@tonic-gateRule	Guat	1983	only	-	Sep	22	0:00	0	S
32837c478bd9Sstevel@tonic-gateRule	Guat	1991	only	-	Mar	23	0:00	1:00	D
32847c478bd9Sstevel@tonic-gateRule	Guat	1991	only	-	Sep	 7	0:00	0	S
32852f9aa4a7SrobbinRule	Guat	2006	only	-	Apr	30	0:00	1:00	D
32862f9aa4a7SrobbinRule	Guat	2006	only	-	Oct	 1	0:00	0	S
3287374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
32887c478bd9Sstevel@tonic-gateZone America/Guatemala	-6:02:04 -	LMT	1918 Oct 5
32897c478bd9Sstevel@tonic-gate			-6:00	Guat	C%sT
32907c478bd9Sstevel@tonic-gate
32917c478bd9Sstevel@tonic-gate# Haiti
329280868c53Srobbin# From Gwillim Law (2005-04-15):
32936f8e8937SDan McDonald# Risto O. Nykänen wrote me that Haiti is now on DST.
32946f8e8937SDan McDonald# I searched for confirmation, and I found a press release
329580868c53Srobbin# on the Web page of the Haitian Consulate in Chicago (2005-03-31),
32966f8e8937SDan McDonald# <http://www.haitianconsulate.org/time.doc>.  Translated from French, it says:
329780868c53Srobbin#
329880868c53Srobbin#  "The Prime Minister's Communication Office notifies the public in general
329980868c53Srobbin#   and the press in particular that, following a decision of the Interior
330080868c53Srobbin#   Ministry and the Territorial Collectivities [I suppose that means the
330180868c53Srobbin#   provinces], Haiti will move to Eastern Daylight Time in the night from next
330280868c53Srobbin#   Saturday the 2nd to Sunday the 3rd.
330380868c53Srobbin#
330480868c53Srobbin#  "Consequently, the Prime Minister's Communication Office wishes to inform
330580868c53Srobbin#   the population that the country's clocks will be set forward one hour
330680868c53Srobbin#   starting at midnight.  This provision will hold until the last Saturday in
330780868c53Srobbin#   October 2005.
330880868c53Srobbin#
330980868c53Srobbin#  "Port-au-Prince, March 31, 2005"
33102f9aa4a7Srobbin#
33112f9aa4a7Srobbin# From Steffen Thorsen (2006-04-04):
33122f9aa4a7Srobbin# I have been informed by users that Haiti observes DST this year like
33132f9aa4a7Srobbin# last year, so the current "only" rule for 2005 might be changed to a
33142f9aa4a7Srobbin# "max" rule or to last until 2006. (Who knows if they will observe DST
33152f9aa4a7Srobbin# next year or if they will extend their DST like US/Canada next year).
33162f9aa4a7Srobbin#
33172f9aa4a7Srobbin# I have found this article about it (in French):
33182f9aa4a7Srobbin# http://www.haitipressnetwork.com/news.cfm?articleID=7612
33192f9aa4a7Srobbin#
33202f9aa4a7Srobbin# The reason seems to be an energy crisis.
33212f9aa4a7Srobbin
3322a68d064cSrobbin# From Stephen Colebourne (2007-02-22):
3323a68d064cSrobbin# Some IATA info: Haiti won't be having DST in 2007.
3324a68d064cSrobbin
3325a43ba736SRobert Mustacchi# From Steffen Thorsen (2012-03-11):
3326a43ba736SRobert Mustacchi# According to several news sources, Haiti will observe DST this year,
3327a43ba736SRobert Mustacchi# apparently using the same start and end date as USA/Canada.
3328a43ba736SRobert Mustacchi# So this means they have already changed their time.
3329a43ba736SRobert Mustacchi#
3330a43ba736SRobert Mustacchi# http://www.alterpresse.org/spip.php?article12510
3331a43ba736SRobert Mustacchi# http://radiovision2000haiti.net/home/?p=13253
3332a43ba736SRobert Mustacchi#
3333a43ba736SRobert Mustacchi# From Arthur David Olson (2012-03-11):
3334a43ba736SRobert Mustacchi# The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to
3335a43ba736SRobert Mustacchi# 3:00 a.m. rather than the traditional Haitian jump at midnight.
3336a43ba736SRobert Mustacchi# Assume a US-style fall back as well.
3337a43ba736SRobert Mustacchi
3338a43ba736SRobert Mustacchi# From Steffen Thorsen (2013-03-10):
3339a43ba736SRobert Mustacchi# It appears that Haiti is observing DST this year as well, same rules
3340a43ba736SRobert Mustacchi# as US/Canada.  They did it last year as well, and it looks like they
3341a43ba736SRobert Mustacchi# are going to observe DST every year now...
3342a43ba736SRobert Mustacchi#
3343a43ba736SRobert Mustacchi# http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/
3344a43ba736SRobert Mustacchi# http://www.canalplushaiti.net/?p=6714
334580868c53Srobbin
3346f63cc156SDan McDonald# From Steffen Thorsen (2016-03-12):
3347f63cc156SDan McDonald# Jean Antoine, editor of www.haiti-reference.com informed us that Haiti
3348f63cc156SDan McDonald# are not going on DST this year.  Several other resources confirm this: ...
3349b654b02dSYuri Pankov# https://www.radiotelevisioncaraibes.com/presse/heure_d_t_pas_de_changement_d_heure_pr_vu_pour_cet_ann_e.html
3350b654b02dSYuri Pankov# https://www.vantbefinfo.com/changement-dheure-pas-pour-haiti/
3351f63cc156SDan McDonald# http://news.anmwe.com/haiti-lheure-nationale-ne-sera-ni-avancee-ni-reculee-cette-annee/
3352f63cc156SDan McDonald
3353dafc4501SDan McDonald# From Steffen Thorsen (2017-03-12):
3354dafc4501SDan McDonald# We have received 4 mails from different people telling that Haiti
3355dafc4501SDan McDonald# has started DST again today, and this source seems to confirm that,
3356dafc4501SDan McDonald# I have not been able to find a more authoritative source:
3357dafc4501SDan McDonald# https://www.haitilibre.com/en/news-20319-haiti-notices-time-change-in-haiti.html
3358dafc4501SDan McDonald
3359f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
33607c478bd9Sstevel@tonic-gateRule	Haiti	1983	only	-	May	8	0:00	1:00	D
33617c478bd9Sstevel@tonic-gateRule	Haiti	1984	1987	-	Apr	lastSun	0:00	1:00	D
33627c478bd9Sstevel@tonic-gateRule	Haiti	1983	1987	-	Oct	lastSun	0:00	0	S
33632f9aa4a7Srobbin# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s.
33642f9aa4a7Srobbin# Go with IATA.
33657c478bd9Sstevel@tonic-gateRule	Haiti	1988	1997	-	Apr	Sun>=1	1:00s	1:00	D
33667c478bd9Sstevel@tonic-gateRule	Haiti	1988	1997	-	Oct	lastSun	1:00s	0	S
3367a68d064cSrobbinRule	Haiti	2005	2006	-	Apr	Sun>=1	0:00	1:00	D
3368a68d064cSrobbinRule	Haiti	2005	2006	-	Oct	lastSun	0:00	0	S
3369f63cc156SDan McDonaldRule	Haiti	2012	2015	-	Mar	Sun>=8	2:00	1:00	D
3370f63cc156SDan McDonaldRule	Haiti	2012	2015	-	Nov	Sun>=1	2:00	0	S
3371dafc4501SDan McDonaldRule	Haiti	2017	max	-	Mar	Sun>=8	2:00	1:00	D
3372dafc4501SDan McDonaldRule	Haiti	2017	max	-	Nov	Sun>=1	2:00	0	S
3373374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
33747c478bd9Sstevel@tonic-gateZone America/Port-au-Prince -4:49:20 -	LMT	1890
33757c478bd9Sstevel@tonic-gate			-4:49	-	PPMT	1917 Jan 24 12:00 # P-a-P MT
33767c478bd9Sstevel@tonic-gate			-5:00	Haiti	E%sT
33777c478bd9Sstevel@tonic-gate
33787c478bd9Sstevel@tonic-gate# Honduras
33792f9aa4a7Srobbin# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1.
33802f9aa4a7Srobbin
33812f9aa4a7Srobbin# From Paul Eggert (2006-05-05):
33822f9aa4a7Srobbin# worldtimezone.com reports a 2006-05-02 Spanish-language AP article
33832f9aa4a7Srobbin# saying Honduras will start using DST midnight Saturday, effective 4
33842f9aa4a7Srobbin# months until September.  La Tribuna reported today
33852f9aa4a7Srobbin# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president
33862f9aa4a7Srobbin# of Honduras, refused to back down on this.
33872f9aa4a7Srobbin
33886f8e8937SDan McDonald# From Jesper Nørgaard Welen (2006-08-08):
33892f9aa4a7Srobbin# It seems that Honduras has returned from DST to standard time this Monday at
33902f9aa4a7Srobbin# 00:00 hours (prolonging Sunday to 25 hours duration).
33912f9aa4a7Srobbin# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html
33922f9aa4a7Srobbin
33932f9aa4a7Srobbin# From Paul Eggert (2006-08-08):
33946f8e8937SDan McDonald# Also see Diario El Heraldo, The country returns to standard time (2006-08-08).
33956f8e8937SDan McDonald# http://www.elheraldo.hn/nota.php?nid=54941&sec=12
33962f9aa4a7Srobbin# It mentions executive decree 18-2006.
33972f9aa4a7Srobbin
33982f9aa4a7Srobbin# From Steffen Thorsen (2006-08-17):
33992f9aa4a7Srobbin# Honduras will observe DST from 2007 to 2009, exact dates are not
34002f9aa4a7Srobbin# published, I have located this authoritative source:
34012f9aa4a7Srobbin# http://www.presidencia.gob.hn/noticia.aspx?nId=47
34022f9aa4a7Srobbin
3403a68d064cSrobbin# From Steffen Thorsen (2007-03-30):
3404a68d064cSrobbin# http://www.laprensahn.com/pais_nota.php?id04962=7386
3405a68d064cSrobbin# So it seems that Honduras will not enter DST this year....
3406a68d064cSrobbin
3407f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
34082f9aa4a7SrobbinRule	Hond	1987	1988	-	May	Sun>=1	0:00	1:00	D
34092f9aa4a7SrobbinRule	Hond	1987	1988	-	Sep	lastSun	0:00	0	S
3410a68d064cSrobbinRule	Hond	2006	only	-	May	Sun>=1	0:00	1:00	D
3411a68d064cSrobbinRule	Hond	2006	only	-	Aug	Mon>=1	0:00	0	S
3412374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
34137c478bd9Sstevel@tonic-gateZone America/Tegucigalpa -5:48:52 -	LMT	1921 Apr
34142f9aa4a7Srobbin			-6:00	Hond	C%sT
34157c478bd9Sstevel@tonic-gate#
34167c478bd9Sstevel@tonic-gate# Great Swan I ceded by US to Honduras in 1972
34177c478bd9Sstevel@tonic-gate
34187c478bd9Sstevel@tonic-gate# Jamaica
3419a43ba736SRobert Mustacchi# Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an
3420a43ba736SRobert Mustacchi# unspecified official document, and says "This time is used throughout the
3421427b4c5cSAndy Fiddaman# island".  Go with Milne.
342200973057SDan McDonald#
342300973057SDan McDonald# Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but
342400973057SDan McDonald# Lance Neita writes that Prime Minister Michael Manley decreed it January 5.
342500973057SDan McDonald# Assume Neita meant Jan 6 02:00, the same as the US.  Neita also writes that
342600973057SDan McDonald# Manley's supporters associated this act with Manley's nickname "Joshua"
342700973057SDan McDonald# (recall that in the Bible the sun stood still at Joshua's request),
342800973057SDan McDonald# and with the Rod of Correction which Manley said he had received from
342900973057SDan McDonald# Haile Selassie, Emperor of Ethiopia.  See:
343000973057SDan McDonald# Neita L. The politician in all of us. Jamaica Observer 2014-09-20
343100973057SDan McDonald# http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647
343200973057SDan McDonald#
3433374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
3434427b4c5cSAndy Fiddaman		#STDOFF	-5:07:10.41
34353508b934SYuri PankovZone	America/Jamaica	-5:07:10 -	LMT	1890        # Kingston
34363508b934SYuri Pankov			-5:07:10 -	KMT	1912 Feb    # Kingston Mean Time
343700973057SDan McDonald			-5:00	-	EST	1974
34387c478bd9Sstevel@tonic-gate			-5:00	US	E%sT	1984
34397c478bd9Sstevel@tonic-gate			-5:00	-	EST
34407c478bd9Sstevel@tonic-gate
34417c478bd9Sstevel@tonic-gate# Martinique
3442374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
34436f8e8937SDan McDonaldZone America/Martinique	-4:04:20 -      LMT	1890        # Fort-de-France
3444*e15592c8SRobert Mustacchi			-4:04:20 -	FFMT	1911 May  1 # Fort-de-France MT
34457c478bd9Sstevel@tonic-gate			-4:00	-	AST	1980 Apr  6
34467c478bd9Sstevel@tonic-gate			-4:00	1:00	ADT	1980 Sep 28
34477c478bd9Sstevel@tonic-gate			-4:00	-	AST
34487c478bd9Sstevel@tonic-gate
34497c478bd9Sstevel@tonic-gate# Nicaragua
34507c478bd9Sstevel@tonic-gate#
34512f9aa4a7Srobbin# This uses Shanks & Pottenger for times before 2005.
34527c478bd9Sstevel@tonic-gate#
345380868c53Srobbin# From Steffen Thorsen (2005-04-12):
345480868c53Srobbin# I've got reports from 8 different people that Nicaragua just started
345580868c53Srobbin# DST on Sunday 2005-04-10, in order to save energy because of
345680868c53Srobbin# expensive petroleum.  The exact end date for DST is not yet
345780868c53Srobbin# announced, only "September" but some sites also say "mid-September".
345880868c53Srobbin# Some background information is available on the President's official site:
345980868c53Srobbin# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm
346080868c53Srobbin# The Decree, no 23-2005 is available here:
346180868c53Srobbin# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2005/Decreto%2023-2005%20Se%20adelanta%20en%20una%20hora%20en%20todo%20el%20territorio%20nacional%20apartir%20de%20las%2024horas%20del%2009%20de%20Abril.pdf
346280868c53Srobbin#
346380868c53Srobbin# From Paul Eggert (2005-05-01):
346480868c53Srobbin# The decree doesn't say anything about daylight saving, but for now let's
34652f9aa4a7Srobbin# assume that it is daylight saving....
346680868c53Srobbin#
346780868c53Srobbin# From Gwillim Law (2005-04-21):
346880868c53Srobbin# The Associated Press story on the time change, which can be found at
346980868c53Srobbin# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html
34706f8e8937SDan McDonald# and elsewhere, says (fifth paragraph, translated from Spanish): "The last
347180868c53Srobbin# time that a change of clocks was applied to save energy was in the year 2000
34726f8e8937SDan McDonald# during the Arnoldo Alemán administration."...
347380868c53Srobbin# The northamerica file says that Nicaragua has been on UTC-6 continuously
347480868c53Srobbin# since December 1998.  I wasn't able to find any details of Nicaraguan time
347580868c53Srobbin# changes in 2000.  Perhaps a note could be added to the northamerica file, to
347680868c53Srobbin# the effect that we have indirect evidence that DST was observed in 2000.
347780868c53Srobbin#
34786f8e8937SDan McDonald# From Jesper Nørgaard Welen (2005-11-02):
347980868c53Srobbin# Nicaragua left DST the 2005-10-02 at 00:00 (local time).
348080868c53Srobbin# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm
348180868c53Srobbin# (2005-09-26)
348280868c53Srobbin#
34836f8e8937SDan McDonald# From Jesper Nørgaard Welen (2006-05-05):
34842f9aa4a7Srobbin# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410
34852f9aa4a7Srobbin# (my informal translation)
34866f8e8937SDan McDonald# By order of the president of the republic, Enrique Bolaños, Nicaragua
34872f9aa4a7Srobbin# advanced by sixty minutes their official time, yesterday at 2 in the
34886f8e8937SDan McDonald# morning, and will stay that way until 30th of September.
34892f9aa4a7Srobbin#
34906f8e8937SDan McDonald# From Jesper Nørgaard Welen (2006-09-30):
34912f9aa4a7Srobbin# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf
34922f9aa4a7Srobbin# My informal translation runs:
34932f9aa4a7Srobbin# The natural sun time is restored in all the national territory, in that the
34942f9aa4a7Srobbin# time is returned one hour at 01:00 am of October 1 of 2006.
34952f9aa4a7Srobbin#
3496f915e6d3SRobert Mustacchi# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
34977c478bd9Sstevel@tonic-gateRule	Nic	1979	1980	-	Mar	Sun>=16	0:00	1:00	D
34987c478bd9Sstevel@tonic-gateRule	Nic	1979	1980	-	Jun	Mon>=23	0:00	0	S
349980868c53SrobbinRule	Nic	2005	only	-	Apr	10	0:00	1:00	D
35002f9aa4a7SrobbinRule	Nic	2005	only	-	Oct	Sun>=1	0:00	0	S
35012f9aa4a7SrobbinRule	Nic	2006	only	-	Apr	30	2:00	1:00	D
35022f9aa4a7SrobbinRule	Nic	2006	only	-	Oct	Sun>=1	1:00	0	S
3503374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
35047c478bd9Sstevel@tonic-gateZone	America/Managua	-5:45:08 -	LMT	1890
35057c478bd9Sstevel@tonic-gate			-5:45:12 -	MMT	1934 Jun 23 # Managua Mean Time?
35067c478bd9Sstevel@tonic-gate			-6:00	-	CST	1973 May
35077c478bd9Sstevel@tonic-gate			-5:00	-	EST	1975 Feb 16
35086f8e8937SDan McDonald			-6:00	Nic	C%sT	1992 Jan  1  4:00
35092f9aa4a7Srobbin			-5:00	-	EST	1992 Sep 24
35102f9aa4a7Srobbin			-6:00	-	CST	1993
35112f9aa4a7Srobbin			-5:00	-	EST	1997
351280868c53Srobbin			-6:00	Nic	C%sT
35137c478bd9Sstevel@tonic-gate
3514f117aa50SRobert Mustacchi# Cayman Is
35157c478bd9Sstevel@tonic-gate# Panama
3516f117aa50SRobert Mustacchi#
3517f117aa50SRobert Mustacchi# Atikokan and Coral Harbour, Canada, match Panama since 1970.
3518374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
35197c478bd9Sstevel@tonic-gateZone	America/Panama	-5:18:08 -	LMT	1890
35206f8e8937SDan McDonald			-5:19:36 -	CMT	1908 Apr 22 # Colón Mean Time
35217c478bd9Sstevel@tonic-gate			-5:00	-	EST
35227c478bd9Sstevel@tonic-gate
3523f117aa50SRobert Mustacchi# Anguilla
3524f117aa50SRobert Mustacchi# Antigua & Barbuda
3525f117aa50SRobert Mustacchi# Aruba
3526f117aa50SRobert Mustacchi# Caribbean Netherlands
3527f117aa50SRobert Mustacchi# Curaçao
3528f117aa50SRobert Mustacchi# Dominica
3529f117aa50SRobert Mustacchi# Grenada
3530f117aa50SRobert Mustacchi# Guadeloupe
3531f117aa50SRobert Mustacchi# Montserrat
35327c478bd9Sstevel@tonic-gate# Puerto Rico
3533f117aa50SRobert Mustacchi# St Barthélemy
3534f117aa50SRobert Mustacchi# St Kitts-Nevis
3535f117aa50SRobert Mustacchi# Sint Maarten / St Martin
3536f117aa50SRobert Mustacchi# St Lucia
3537f117aa50SRobert Mustacchi# St Vincent & the Grenadines
3538f117aa50SRobert Mustacchi# Trinidad & Tobago
3539f117aa50SRobert Mustacchi# Virgin Is (UK & US)
3540f117aa50SRobert Mustacchi#
3541a43ba736SRobert Mustacchi# There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'.
3542374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
35436f8e8937SDan McDonaldZone America/Puerto_Rico -4:24:25 -	LMT	1899 Mar 28 12:00 # San Juan
35447c478bd9Sstevel@tonic-gate			-4:00	-	AST	1942 May  3
35452f9aa4a7Srobbin			-4:00	US	A%sT	1946
35467c478bd9Sstevel@tonic-gate			-4:00	-	AST
35477c478bd9Sstevel@tonic-gate
35487c478bd9Sstevel@tonic-gate# St Pierre and Miquelon
3549a43ba736SRobert Mustacchi# There are too many St Pierres elsewhere, so we'll use 'Miquelon'.
3550374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
3551*e15592c8SRobert MustacchiZone America/Miquelon	-3:44:40 -	LMT	1911 Jun 15 # St Pierre
35527c478bd9Sstevel@tonic-gate			-4:00	-	AST	1980 May
3553dafc4501SDan McDonald			-3:00	-	-03	1987
3554dafc4501SDan McDonald			-3:00	Canada	-03/-02
35557c478bd9Sstevel@tonic-gate
35567c478bd9Sstevel@tonic-gate# Turks and Caicos
3557a68d064cSrobbin#
3558a68d064cSrobbin# From Chris Dunn in
3559b654b02dSYuri Pankov# https://bugs.debian.org/415007
3560a68d064cSrobbin# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the
3561a68d064cSrobbin# daylight saving dates for time changes have been adjusted to match
3562a68d064cSrobbin# the recent U.S. change of dates.
3563a68d064cSrobbin#
3564a68d064cSrobbin# From Brian Inglis (2007-04-28):
3565a68d064cSrobbin# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26]
3566a68d064cSrobbin# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three
3567a68d064cSrobbin# rows before that there is an out of date entry for Oct:
3568a68d064cSrobbin# "Eastern Standard Times Begins 2007
3569a68d064cSrobbin# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time"
3570a68d064cSrobbin# indicating that the normal ET rules are followed.
3571f915e6d3SRobert Mustacchi
35726f8e8937SDan McDonald# From Paul Eggert (2014-08-19):
3573c2d5ab87SDan McDonald# The 2014-08-13 Cabinet meeting decided to stay on UT -04 year-round.  See:
35746f8e8937SDan McDonald# http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm
357500973057SDan McDonald# Model this as a switch from EST/EDT to AST ...
357600973057SDan McDonald# From Chris Walton (2014-11-04):
357700973057SDan McDonald# ... the TCI government appears to have delayed the switch to
357800973057SDan McDonald# "permanent daylight saving time" by one year....
357900973057SDan McDonald# http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm
3580a68d064cSrobbin#
3581b654b02dSYuri Pankov# From the Turks & Caicos Cabinet (2017-07-20), heads-up from Steffen Thorsen:
3582b654b02dSYuri Pankov# ... agreed to the reintroduction in TCI of Daylight Saving Time (DST)
3583b654b02dSYuri Pankov# during the summer months and Standard Time, also known as Local
3584b654b02dSYuri Pankov# Time, during the winter months with effect from April 2018 ...
3585b654b02dSYuri Pankov# https://www.gov.uk/government/news/turks-and-caicos-post-cabinet-meeting-statement--3
3586b654b02dSYuri Pankov# From Paul Eggert (2017-08-26):
3587b654b02dSYuri Pankov# The date of effect of the spring 2018 change appears to be March 11,
3588b654b02dSYuri Pankov# which makes more sense.  See: Hamilton D. Time change back
3589b654b02dSYuri Pankov# by March 2018 for TCI. Magnetic Media. 2017-08-25.
3590b654b02dSYuri Pankov# http://magneticmediatv.com/2017/08/time-change-back-by-march-2018-for-tci/
3591b654b02dSYuri Pankov#
3592f915e6d3SRobert Mustacchi# From P Chan (2020-11-27):
3593f915e6d3SRobert Mustacchi# Standard Time Declaration Order 2015 (L.N. 15/2015)
3594f915e6d3SRobert Mustacchi# http://online.fliphtml5.com/fizd/czin/#p=2
3595f915e6d3SRobert Mustacchi#
3596f915e6d3SRobert Mustacchi# Standard Time Declaration Order 2017 (L.N. 31/2017)
3597f915e6d3SRobert Mustacchi# http://online.fliphtml5.com/fizd/dmcu/#p=2
3598f915e6d3SRobert Mustacchi#
3599f915e6d3SRobert Mustacchi# From Tim Parenti (2020-12-05):
3600f915e6d3SRobert Mustacchi# Although L.N. 31/2017 reads that it "shall come into operation at 2:00 a.m.
3601f915e6d3SRobert Mustacchi# on 11th March 2018", a precise interpretation here poses some problems.  The
3602f915e6d3SRobert Mustacchi# order states that "the standard time to be observed throughout the Turks and
3603f915e6d3SRobert Mustacchi# Caicos Islands shall be the same time zone as the Eastern United States of
3604f915e6d3SRobert Mustacchi# America" and further clarifies "[f]or the avoidance of doubt" that it
3605f915e6d3SRobert Mustacchi# "applies to the Eastern Standard Time as well as any changes thereto for
3606f915e6d3SRobert Mustacchi# Daylight Saving Time."  However, as clocks in Turks and Caicos approached
3607f915e6d3SRobert Mustacchi# 02:00 -04, and thus the declared implementation time, it was still 01:00 EST
3608f915e6d3SRobert Mustacchi# (-05), as DST in the Eastern US would not start until an hour later.
3609f915e6d3SRobert Mustacchi#
3610f915e6d3SRobert Mustacchi# Since it is unlikely that those on the islands switched their clocks twice in
3611f915e6d3SRobert Mustacchi# the span of an hour, we assume instead that the adoption of EDT actually took
3612f915e6d3SRobert Mustacchi# effect once clocks in the Eastern US had sprung forward, from 03:00 -04.
3613f915e6d3SRobert Mustacchi# This discrepancy only affects the time zone abbreviation and DST flag for the
3614f915e6d3SRobert Mustacchi# intervening hour, not wall clock times, as -04 was maintained throughout.
3615f915e6d3SRobert Mustacchi
3616374df668SAndy Fiddaman# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
36177c478bd9Sstevel@tonic-gateZone America/Grand_Turk	-4:44:32 -	LMT	1890
3618427b4c5cSAndy Fiddaman		#STDOFF	-5:07:10.41
36193508b934SYuri Pankov			-5:07:10 -	KMT	1912 Feb # Kingston Mean Time
36206f8e8937SDan McDonald			-5:00	-	EST	1979
3621f915e6d3SRobert Mustacchi			-5:00	US	E%sT	2015 Mar  8  2:00
3622f915e6d3SRobert Mustacchi			-4:00	-	AST	2018 Mar 11  3:00
3623b654b02dSYuri Pankov			-5:00	US	E%sT
36247c478bd9Sstevel@tonic-gate
36256f8e8937SDan McDonald# Local Variables:
36266f8e8937SDan McDonald# coding: utf-8
36276f8e8937SDan McDonald# End:
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