105e627dcSAndy Fiddaman# tzdb data for South 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. 57c478bd9Sstevel@tonic-gate 66f8e8937SDan McDonald# This file is by no means authoritative; if you think you know better, 77c478bd9Sstevel@tonic-gate# go ahead and edit the file (and please send any changes to 86f8e8937SDan McDonald# tz@iana.org for general use in the future). For more, please see 96f8e8937SDan McDonald# the file CONTRIBUTING in the tz distribution. 107c478bd9Sstevel@tonic-gate 11dafc4501SDan McDonald# From Paul Eggert (2016-12-05): 1200973057SDan McDonald# 1300973057SDan McDonald# Unless otherwise specified, the source for data through 1990 is: 142f9aa4a7Srobbin# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 152f9aa4a7Srobbin# San Diego: ACS Publications, Inc. (2003). 1600973057SDan McDonald# Unfortunately this book contains many errors and cites no sources. 17a43ba736SRobert Mustacchi# 18dafc4501SDan McDonald# Many years ago Gwillim Law wrote that a good source 19dafc4501SDan McDonald# for time zone data was the International Air Transport 207c478bd9Sstevel@tonic-gate# Association's Standard Schedules Information Manual (IATA SSIM), 217c478bd9Sstevel@tonic-gate# published semiannually. Law sent in several helpful summaries 2200973057SDan McDonald# of the IATA's data after 1990. Except where otherwise noted, 2300973057SDan McDonald# IATA SSIM is the source for entries after 1990. 247c478bd9Sstevel@tonic-gate# 2500973057SDan McDonald# For data circa 1899, a common source is: 2600973057SDan McDonald# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94. 27b654b02dSYuri Pankov# https://www.jstor.org/stable/1774359 287c478bd9Sstevel@tonic-gate# 29dafc4501SDan McDonald# These tables use numeric abbreviations like -03 and -0330 for 304b8ee424SYuri Pankov# integer hour and minute UT offsets. Although earlier editions used 31dafc4501SDan McDonald# alphabetic time zone abbreviations, these abbreviations were 32dafc4501SDan McDonald# invented and did not reflect common practice. 337c478bd9Sstevel@tonic-gate 347c478bd9Sstevel@tonic-gate############################################################################### 357c478bd9Sstevel@tonic-gate 367c478bd9Sstevel@tonic-gate############################################################################### 377c478bd9Sstevel@tonic-gate 387c478bd9Sstevel@tonic-gate# Argentina 397c478bd9Sstevel@tonic-gate 407c478bd9Sstevel@tonic-gate# From Bob Devine (1988-01-28): 417c478bd9Sstevel@tonic-gate# Argentina: first Sunday in October to first Sunday in April since 1976. 427c478bd9Sstevel@tonic-gate# Double Summer time from 1969 to 1974. Switches at midnight. 437c478bd9Sstevel@tonic-gate 446f8e8937SDan McDonald# From U. S. Naval Observatory (1988-01-19): 457c478bd9Sstevel@tonic-gate# ARGENTINA 3 H BEHIND UTC 467c478bd9Sstevel@tonic-gate 4780868c53Srobbin# From Hernan G. Otero (1995-06-26): 487c478bd9Sstevel@tonic-gate# I am sending modifications to the Argentine time zone table... 497c478bd9Sstevel@tonic-gate# AR was chosen because they are the ISO letters that represent Argentina. 507c478bd9Sstevel@tonic-gate 51f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 523508b934SYuri PankovRule Arg 1930 only - Dec 1 0:00 1:00 - 537c478bd9Sstevel@tonic-gateRule Arg 1931 only - Apr 1 0:00 0 - 543508b934SYuri PankovRule Arg 1931 only - Oct 15 0:00 1:00 - 557c478bd9Sstevel@tonic-gateRule Arg 1932 1940 - Mar 1 0:00 0 - 563508b934SYuri PankovRule Arg 1932 1939 - Nov 1 0:00 1:00 - 573508b934SYuri PankovRule Arg 1940 only - Jul 1 0:00 1:00 - 587c478bd9Sstevel@tonic-gateRule Arg 1941 only - Jun 15 0:00 0 - 593508b934SYuri PankovRule Arg 1941 only - Oct 15 0:00 1:00 - 607c478bd9Sstevel@tonic-gateRule Arg 1943 only - Aug 1 0:00 0 - 613508b934SYuri PankovRule Arg 1943 only - Oct 15 0:00 1:00 - 627c478bd9Sstevel@tonic-gateRule Arg 1946 only - Mar 1 0:00 0 - 633508b934SYuri PankovRule Arg 1946 only - Oct 1 0:00 1:00 - 647c478bd9Sstevel@tonic-gateRule Arg 1963 only - Oct 1 0:00 0 - 653508b934SYuri PankovRule Arg 1963 only - Dec 15 0:00 1:00 - 667c478bd9Sstevel@tonic-gateRule Arg 1964 1966 - Mar 1 0:00 0 - 673508b934SYuri PankovRule Arg 1964 1966 - Oct 15 0:00 1:00 - 687c478bd9Sstevel@tonic-gateRule Arg 1967 only - Apr 2 0:00 0 - 693508b934SYuri PankovRule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 - 707c478bd9Sstevel@tonic-gateRule Arg 1968 1969 - Apr Sun>=1 0:00 0 - 713508b934SYuri PankovRule Arg 1974 only - Jan 23 0:00 1:00 - 727c478bd9Sstevel@tonic-gateRule Arg 1974 only - May 1 0:00 0 - 733508b934SYuri PankovRule Arg 1988 only - Dec 1 0:00 1:00 - 747c478bd9Sstevel@tonic-gate# 7580868c53Srobbin# From Hernan G. Otero (1995-06-26): 767c478bd9Sstevel@tonic-gate# These corrections were contributed by InterSoft Argentina S.A., 777c478bd9Sstevel@tonic-gate# obtaining the data from the: 786f8e8937SDan McDonald# Talleres de Hidrografía Naval Argentina 797c478bd9Sstevel@tonic-gate# (Argentine Naval Hydrography Institute) 807c478bd9Sstevel@tonic-gateRule Arg 1989 1993 - Mar Sun>=1 0:00 0 - 813508b934SYuri PankovRule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 - 827c478bd9Sstevel@tonic-gate# 8380868c53Srobbin# From Hernan G. Otero (1995-06-26): 847c478bd9Sstevel@tonic-gate# From this moment on, the law that mandated the daylight saving 857c478bd9Sstevel@tonic-gate# time corrections was derogated and no more modifications 867c478bd9Sstevel@tonic-gate# to the time zones (for daylight saving) are now made. 877c478bd9Sstevel@tonic-gate# 887c478bd9Sstevel@tonic-gate# From Rives McDow (2000-01-10): 897c478bd9Sstevel@tonic-gate# On October 3, 1999, 0:00 local, Argentina implemented daylight savings time, 907c478bd9Sstevel@tonic-gate# which did not result in the switch of a time zone, as they stayed 9 hours 917c478bd9Sstevel@tonic-gate# from the International Date Line. 923508b934SYuri PankovRule Arg 1999 only - Oct Sun>=1 0:00 1:00 - 93106fe065Srobbin# From Paul Eggert (2007-12-28): 94106fe065Srobbin# DST was set to expire on March 5, not March 3, but since it was converted 95106fe065Srobbin# to standard time on March 3 it's more convenient for us to pretend that 96106fe065Srobbin# it ended on March 3. 97106fe065SrobbinRule Arg 2000 only - Mar 3 0:00 0 - 987c478bd9Sstevel@tonic-gate# 997c478bd9Sstevel@tonic-gate# From Peter Gradelski via Steffen Thorsen (2000-03-01): 1006f8e8937SDan McDonald# We just checked with our São Paulo office and they say the government of 1017c478bd9Sstevel@tonic-gate# Argentina decided not to become one of the countries that go on or off DST. 1027c478bd9Sstevel@tonic-gate# So Buenos Aires should be -3 hours from GMT at all times. 1037c478bd9Sstevel@tonic-gate# 1046f8e8937SDan McDonald# From Fabián L. Arce Jofré (2000-04-04): 1057c478bd9Sstevel@tonic-gate# The law that claimed DST for Argentina was derogated by President Fernando 1066f8e8937SDan McDonald# de la Rúa on March 2, 2000, because it would make people spend more energy 1077c478bd9Sstevel@tonic-gate# in the winter time, rather than less. The change took effect on March 3. 1087c478bd9Sstevel@tonic-gate# 1097c478bd9Sstevel@tonic-gate# From Mariano Absatz (2001-06-06): 1107c478bd9Sstevel@tonic-gate# one of the major newspapers here in Argentina said that the 1999 1117c478bd9Sstevel@tonic-gate# Timezone Law (which never was effectively applied) will (would?) be 1127c478bd9Sstevel@tonic-gate# in effect.... The article is at 1137c478bd9Sstevel@tonic-gate# http://ar.clarin.com/diario/2001-06-06/e-01701.htm 11456b82ca8SDan McDonald# ... The Law itself is "Ley No. 25155", sanctioned on 1999-08-25, enacted 1157c478bd9Sstevel@tonic-gate# 1999-09-17, and published 1999-09-21. The official publication is at: 1167c478bd9Sstevel@tonic-gate# http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF 1177c478bd9Sstevel@tonic-gate# Regretfully, you have to subscribe (and pay) for the on-line version.... 1187c478bd9Sstevel@tonic-gate# 1197c478bd9Sstevel@tonic-gate# (2001-06-12): 1207c478bd9Sstevel@tonic-gate# the timezone for Argentina will not change next Sunday. 1217c478bd9Sstevel@tonic-gate# Apparently it will do so on Sunday 24th.... 1227c478bd9Sstevel@tonic-gate# http://ar.clarin.com/diario/2001-06-12/s-03501.htm 1237c478bd9Sstevel@tonic-gate# 1247c478bd9Sstevel@tonic-gate# (2001-06-25): 1257c478bd9Sstevel@tonic-gate# Last Friday (yes, the last working day before the date of the change), the 1267c478bd9Sstevel@tonic-gate# Senate annulled the 1999 law that introduced the changes later postponed. 1277c478bd9Sstevel@tonic-gate# http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm 1287c478bd9Sstevel@tonic-gate# It remains the vote of the Deputies..., but it will be the same.... 1297c478bd9Sstevel@tonic-gate# This kind of things had always been done this way in Argentina. 1307c478bd9Sstevel@tonic-gate# We are still -03:00 all year round in all of the country. 1317c478bd9Sstevel@tonic-gate# 132106fe065Srobbin# From Steffen Thorsen (2007-12-21): 133106fe065Srobbin# A user (Leonardo Chaim) reported that Argentina will adopt DST.... 134106fe065Srobbin# all of the country (all Zone-entries) are affected. News reports like 135106fe065Srobbin# http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate 136106fe065Srobbin# that Argentina will use DST next year as well, from October to 137106fe065Srobbin# March, although exact rules are not given. 138106fe065Srobbin# 1396f8e8937SDan McDonald# From Jesper Nørgaard Welen (2007-12-26) 140106fe065Srobbin# The last hurdle of Argentina DST is over, the proposal was approved in 1416f8e8937SDan McDonald# the lower chamber too (Diputados) with a vote 192 for and 2 against. 142106fe065Srobbin# By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to 143106fe065Srobbin# the original scanned proposal, where the dates and the zero hours are 144106fe065Srobbin# clear and unambiguous...This is the article about final approval: 145106fe065Srobbin# http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996 146106fe065Srobbin# 147106fe065Srobbin# From Paul Eggert (2007-12-22): 148106fe065Srobbin# For dates after mid-2008, the following rules are my guesses and 149106fe065Srobbin# are quite possibly wrong, but are more likely than no DST at all. 150376a7c81SRobbin Kawabata 151376a7c81SRobbin Kawabata# From Alexander Krivenyshev (2008-09-05): 152376a7c81SRobbin Kawabata# As per message from Carlos Alberto Fonseca Arauz (Nicaragua), 153376a7c81SRobbin Kawabata# Argentina will start DST on Sunday October 19, 2008. 154376a7c81SRobbin Kawabata# 155376a7c81SRobbin Kawabata# http://www.worldtimezone.com/dst_news/dst_news_argentina03.html 156376a7c81SRobbin Kawabata# http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish) 157376a7c81SRobbin Kawabata 15856b82ca8SDan McDonald# From Juan Manuel Docile in https://bugs.gentoo.org/240339 (2008-10-07) 15956b82ca8SDan McDonald# via Rodrigo Severo: 16056b82ca8SDan McDonald# Argentinian law No. 25.155 is no longer valid. 161376a7c81SRobbin Kawabata# http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm 16256b82ca8SDan McDonald# The new one is law No. 26.350 163376a7c81SRobbin Kawabata# http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm 164376a7c81SRobbin Kawabata# So there is no summer time in Argentina for now. 165376a7c81SRobbin Kawabata 1668e4c1c45SRobbin Kawabata# From Mariano Absatz (2008-10-20): 1676f8e8937SDan McDonald# Decree 1693/2008 applies Law 26.350 for the summer 2008/2009 establishing DST 1686f8e8937SDan McDonald# in Argentina from 2008-10-19 until 2009-03-15. 1698e4c1c45SRobbin Kawabata# http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01 1708e4c1c45SRobbin Kawabata# 1716f8e8937SDan McDonald 1726f8e8937SDan McDonald# Decree 1705/2008 excepting 12 Provinces from applying DST in the summer 1736f8e8937SDan McDonald# 2008/2009: Catamarca, La Rioja, Mendoza, Salta, San Juan, San Luis, La 1746f8e8937SDan McDonald# Pampa, Neuquén, Rio Negro, Chubut, Santa Cruz and Tierra del Fuego 1758e4c1c45SRobbin Kawabata# http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01 1768e4c1c45SRobbin Kawabata# 1776f8e8937SDan McDonald# Press release 235 dated Saturday October 18th, from the Government of the 1786f8e8937SDan McDonald# Province of Jujuy saying it will not apply DST either (even when it was not 1796f8e8937SDan McDonald# included in Decree 1705/2008). 1808e4c1c45SRobbin Kawabata# http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc 1818e4c1c45SRobbin Kawabata 1823254abe6SNobutomo Nakano# From fullinet (2009-10-18): 1833254abe6SNobutomo Nakano# As announced in 1843254abe6SNobutomo Nakano# http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356 1856f8e8937SDan McDonald# (an official .gob.ar) under title: "Sin Cambio de Hora" 1866f8e8937SDan McDonald# (English: "No hour change"). 1873254abe6SNobutomo Nakano# 1886f8e8937SDan McDonald# "Por el momento, el Gobierno Nacional resolvió no modificar la hora 1896f8e8937SDan McDonald# oficial, decisión que estaba en estudio para su implementación el 1906f8e8937SDan McDonald# domingo 18 de octubre. Desde el Ministerio de Planificación se anunció 1916f8e8937SDan McDonald# que la Argentina hoy, en estas condiciones meteorológicas, no necesita 1926f8e8937SDan McDonald# la modificación del huso horario, ya que 2009 nos encuentra con 1936f8e8937SDan McDonald# crecimiento en la producción y distribución energética." 1943254abe6SNobutomo Nakano 1953508b934SYuri PankovRule Arg 2007 only - Dec 30 0:00 1:00 - 1963254abe6SNobutomo NakanoRule Arg 2008 2009 - Mar Sun>=15 0:00 0 - 1973508b934SYuri PankovRule Arg 2008 only - Oct Sun>=15 0:00 1:00 - 198a43ba736SRobert Mustacchi 1997c478bd9Sstevel@tonic-gate# From Mariano Absatz (2004-05-21): 2007c478bd9Sstevel@tonic-gate# Today it was officially published that the Province of Mendoza is changing 2017c478bd9Sstevel@tonic-gate# its timezone this winter... starting tomorrow night.... 2027c478bd9Sstevel@tonic-gate# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf 2037c478bd9Sstevel@tonic-gate# From Paul Eggert (2004-05-24): 2047c478bd9Sstevel@tonic-gate# It's Law No. 7,210. This change is due to a public power emergency, so for 2057c478bd9Sstevel@tonic-gate# now we'll assume it's for this year only. 2067c478bd9Sstevel@tonic-gate# 2073508b934SYuri Pankov# From Paul Eggert (2018-01-31): 2086f8e8937SDan McDonald# Hora de verano para la República Argentina 2096f8e8937SDan McDonald# http://buenasiembra.com.ar/esoterismo/astrologia/hora-de-verano-de-la-republica-argentina-27.html 2106f8e8937SDan McDonald# says that standard time in Argentina from 1894-10-31 211af2e290bSAndy Fiddaman# to 1920-05-01 was -4:16:48.25. Go with this more precise value 2123508b934SYuri Pankov# over Shanks & Pottenger. It is upward compatible with Milne, who 2133508b934SYuri Pankov# says Córdoba time was -4:16:48.2. 2143508b934SYuri Pankov 2157c478bd9Sstevel@tonic-gate# 2167c478bd9Sstevel@tonic-gate# From Mariano Absatz (2004-06-05): 2177c478bd9Sstevel@tonic-gate# These media articles from a major newspaper mostly cover the current state: 2187c478bd9Sstevel@tonic-gate# http://www.lanacion.com.ar/04/05/27/de_604825.asp 2197c478bd9Sstevel@tonic-gate# http://www.lanacion.com.ar/04/05/28/de_605203.asp 2207c478bd9Sstevel@tonic-gate# 2217c478bd9Sstevel@tonic-gate# The following eight (8) provinces pulled clocks back to UTC-04:00 at 2227c478bd9Sstevel@tonic-gate# midnight Monday May 31st. (that is, the night between 05/31 and 06/01). 2237c478bd9Sstevel@tonic-gate# Apparently, all nine provinces would go back to UTC-03:00 at the same 2247c478bd9Sstevel@tonic-gate# time in October 17th. 2257c478bd9Sstevel@tonic-gate# 2267c478bd9Sstevel@tonic-gate# Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz, 2276f8e8937SDan McDonald# Tierra del Fuego, Tucumán. 2287c478bd9Sstevel@tonic-gate# 2297c478bd9Sstevel@tonic-gate# From Mariano Absatz (2004-06-14): 2306f8e8937SDan McDonald# ... this weekend, the Province of Tucumán decided it'd go back to UTC-03:00 2317c478bd9Sstevel@tonic-gate# yesterday midnight (that is, at 24:00 Saturday 12th), since the people's 2327c478bd9Sstevel@tonic-gate# annoyance with the change is much higher than the power savings obtained.... 2337c478bd9Sstevel@tonic-gate# 2347c478bd9Sstevel@tonic-gate# From Gwillim Law (2004-06-14): 2357c478bd9Sstevel@tonic-gate# http://www.lanacion.com.ar/04/06/10/de_609078.asp ... 2367c478bd9Sstevel@tonic-gate# "The time change in Tierra del Fuego was a conflicted decision from 2377c478bd9Sstevel@tonic-gate# the start. The government had decreed that the measure would take 2387c478bd9Sstevel@tonic-gate# effect on June 1, but a normative error forced the new time to begin 2397c478bd9Sstevel@tonic-gate# three days earlier, from a Saturday to a Sunday.... 2407c478bd9Sstevel@tonic-gate# Our understanding was that the change was originally scheduled to take place 2417c478bd9Sstevel@tonic-gate# on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other 2427c478bd9Sstevel@tonic-gate# provinces). Sunday was May 30, only two days earlier. So the article 2437c478bd9Sstevel@tonic-gate# contains a contradiction. I would give more credence to the Saturday/Sunday 2447c478bd9Sstevel@tonic-gate# date than the "three days earlier" phrase, and conclude that Tierra del 2457c478bd9Sstevel@tonic-gate# Fuego set its clocks back at 2004-05-30 00:00. 2467c478bd9Sstevel@tonic-gate# 2477c478bd9Sstevel@tonic-gate# From Steffen Thorsen (2004-10-05): 2487c478bd9Sstevel@tonic-gate# The previous law 7210 which changed the province of Mendoza's time zone 2497c478bd9Sstevel@tonic-gate# back in May have been modified slightly in a new law 7277, which set the 2507c478bd9Sstevel@tonic-gate# new end date to 2004-09-26 (original date was 2004-10-17). 2517c478bd9Sstevel@tonic-gate# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf 2527c478bd9Sstevel@tonic-gate# 2537c478bd9Sstevel@tonic-gate# From Mariano Absatz (2004-10-05): 2547c478bd9Sstevel@tonic-gate# San Juan changed from UTC-03:00 to UTC-04:00 at midnight between 2557c478bd9Sstevel@tonic-gate# Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00 2567c478bd9Sstevel@tonic-gate# at midnight between Saturday, July 24th and Sunday, July 25th.... 2577c478bd9Sstevel@tonic-gate# http://www.sanjuan.gov.ar/prensa/archivo/000329.html 2587c478bd9Sstevel@tonic-gate# http://www.sanjuan.gov.ar/prensa/archivo/000426.html 2597c478bd9Sstevel@tonic-gate# http://www.sanjuan.gov.ar/prensa/archivo/000441.html 2607c478bd9Sstevel@tonic-gate 2618593320bSrobbin# From Alex Krivenyshev (2008-01-17): 2628593320bSrobbin# Here are articles that Argentina Province San Luis is planning to end DST 2638593320bSrobbin# as earlier as upcoming Monday January 21, 2008 or February 2008: 2648593320bSrobbin# 2656f8e8937SDan McDonald# Provincia argentina retrasa reloj y marca diferencia con resto del país 2668593320bSrobbin# (Argentine Province delayed clock and mark difference with the rest of the 2678593320bSrobbin# country) 2688593320bSrobbin# http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel 2698593320bSrobbin# 2708593320bSrobbin# Es inminente que en San Luis atrasen una hora los relojes 2718593320bSrobbin# (It is imminent in San Luis clocks one hour delay) 272b654b02dSYuri Pankov# https://www.lagaceta.com.ar/nota/253414/Economia/Es-inminente-que-en-San-Luis-atrasen-una-hora-los-relojes.html 273b654b02dSYuri Pankov# http://www.worldtimezone.com/dst_news/dst_news_argentina02.html 2748593320bSrobbin 2756f8e8937SDan McDonald# From Jesper Nørgaard Welen (2008-01-18): 2768593320bSrobbin# The page of the San Luis provincial government 2778593320bSrobbin# http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812 2788593320bSrobbin# confirms what Alex Krivenyshev has earlier sent to the tz 2798593320bSrobbin# emailing list about that San Luis plans to return to standard 2808593320bSrobbin# time much earlier than the rest of the country. It also 281a43ba736SRobert Mustacchi# confirms that upon request the provinces San Juan and Mendoza 282a43ba736SRobert Mustacchi# refused to follow San Luis in this change. 283a43ba736SRobert Mustacchi# 2846f8e8937SDan McDonald# The change is supposed to take place Monday the 21st at 0:00 2858593320bSrobbin# hours. As far as I understand it if this goes ahead, we need 2868593320bSrobbin# a new timezone for San Luis (although there are also documented 2878593320bSrobbin# independent changes in the southamerica file of San Luis in 2888593320bSrobbin# 1990 and 1991 which has not been confirmed). 2898593320bSrobbin 2906f8e8937SDan McDonald# From Jesper Nørgaard Welen (2008-01-25): 2918593320bSrobbin# Unfortunately the below page has become defunct, about the San Luis 2928593320bSrobbin# time change. Perhaps because it now is part of a group of pages "Most 2938593320bSrobbin# important pages of 2008." 2948593320bSrobbin# 2958593320bSrobbin# You can use 2968593320bSrobbin# http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834 2978593320bSrobbin# instead it seems. Or use "Buscador" from the main page of the San Luis 2988593320bSrobbin# government, and fill in "huso" and click OK, and you will get 3 pages 2998593320bSrobbin# from which the first one is identical to the above. 3008593320bSrobbin 3018593320bSrobbin# From Mariano Absatz (2008-01-28): 3028593320bSrobbin# I can confirm that the Province of San Luis (and so far only that 3038593320bSrobbin# province) decided to go back to UTC-3 effective midnight Jan 20th 2008 3048593320bSrobbin# (that is, Monday 21st at 0:00 is the time the clocks were delayed back 3058593320bSrobbin# 1 hour), and they intend to keep UTC-3 as their timezone all year round 3068593320bSrobbin# (that is, unless they change their mind any minute now). 3078593320bSrobbin# 3088593320bSrobbin# So we'll have to add yet another city to 'southamerica' (I think San 3098593320bSrobbin# Luis city is the mos populated city in the Province, so it'd be 3108593320bSrobbin# America/Argentina/San_Luis... of course I can't remember if San Luis's 3118593320bSrobbin# history of particular changes goes along with Mendoza or San Juan :-( 3128593320bSrobbin# (I only remember not being able to collect hard facts about San Luis 3138593320bSrobbin# back in 2004, when these provinces changed to UTC-4 for a few days, I 3148593320bSrobbin# mailed them personally and never got an answer). 3158593320bSrobbin 3166f8e8937SDan McDonald# From Paul Eggert (2014-08-12): 3176f8e8937SDan McDonald# Unless otherwise specified, data entries are from Shanks & Pottenger through 3186f8e8937SDan McDonald# 1992, from the IATA otherwise. As noted below, Shanks & Pottenger say that 31956725381Srobbin# America/Cordoba split into 6 subregions during 1991/1992, one of which 32056725381Srobbin# was America/San_Luis, but we haven't verified this yet so for now we'll 32156725381Srobbin# keep America/Cordoba a single region rather than splitting it into the 32256725381Srobbin# other 5 subregions. 32356725381Srobbin 32410355008SNobutomo Nakano# From Mariano Absatz (2009-03-13): 32510355008SNobutomo Nakano# Yesterday (with our usual 2-day notice) the Province of San Luis 32610355008SNobutomo Nakano# decided that next Sunday instead of "staying" @utc-03:00 they will go 32710355008SNobutomo Nakano# to utc-04:00 until the second Saturday in October... 32810355008SNobutomo Nakano# 32910355008SNobutomo Nakano# The press release is at 33010355008SNobutomo Nakano# http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102 3316f8e8937SDan McDonald# (I couldn't find the decree, but www.sanluis.gov.ar 3326f8e8937SDan McDonald# is the official page for the Province Government.) 33310355008SNobutomo Nakano# 334a43ba736SRobert Mustacchi# There's also a note in only one of the major national papers ... 33510355008SNobutomo Nakano# http://www.lanacion.com.ar/nota.asp?nota_id=1107912 336a43ba736SRobert Mustacchi# 337a43ba736SRobert Mustacchi# The press release says [quick and dirty translation]: 338a43ba736SRobert Mustacchi# ... announced that next Sunday, at 00:00, Puntanos (the San Luis 33910355008SNobutomo Nakano# inhabitants) will have to turn back one hour their clocks 34010355008SNobutomo Nakano# 34110355008SNobutomo Nakano# Since then, San Luis will establish its own Province timezone. Thus, 34210355008SNobutomo Nakano# during 2009, this timezone change will run from 00:00 the third Sunday 34310355008SNobutomo Nakano# in March until 24:00 of the second Saturday in October. 34410355008SNobutomo Nakano 3453254abe6SNobutomo Nakano# From Mariano Absatz (2009-10-16): 3463254abe6SNobutomo Nakano# ...the Province of San Luis is a case in itself. 3473254abe6SNobutomo Nakano# 3483254abe6SNobutomo Nakano# The Law at 3493254abe6SNobutomo Nakano# http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276 3503254abe6SNobutomo Nakano# is ambiguous because establishes a calendar from the 2nd Sunday in 3513254abe6SNobutomo Nakano# October at 0:00 thru the 2nd Saturday in March at 24:00 and the 3523254abe6SNobutomo Nakano# complement of that starting on the 2nd Sunday of March at 0:00 and 3533254abe6SNobutomo Nakano# ending on the 2nd Saturday of March at 24:00. 3543254abe6SNobutomo Nakano# 3553254abe6SNobutomo Nakano# This clearly breaks every time the 1st of March or October is a Sunday. 3563254abe6SNobutomo Nakano# 3573254abe6SNobutomo Nakano# IMHO, the "spirit of the Law" is to make the changes at 0:00 on the 2nd 3583254abe6SNobutomo Nakano# Sunday of October and March. 3593254abe6SNobutomo Nakano# 3603254abe6SNobutomo Nakano# The problem is that the changes in the rest of the Provinces that did 3613254abe6SNobutomo Nakano# change in 2007/2008, were made according to the Federal Law and Decrees 3623254abe6SNobutomo Nakano# that did so on the 3rd Sunday of October and March. 3637c478bd9Sstevel@tonic-gate# 3643254abe6SNobutomo Nakano# In fact, San Luis actually switched from UTC-4 to UTC-3 last Sunday 3653254abe6SNobutomo Nakano# (October 11th) at 0:00. 3663254abe6SNobutomo Nakano# 3673254abe6SNobutomo Nakano# So I guess a new set of rules, besides "Arg", must be made and the last 3683254abe6SNobutomo Nakano# America/Argentina/San_Luis entries should change to use these... 3693254abe6SNobutomo Nakano# ... 3703254abe6SNobutomo Nakano 3710ba103b8SNobutomo Nakano# From Alexander Krivenyshev (2010-04-09): 3726f8e8937SDan McDonald# According to news reports from El Diario de la República Province San 3730ba103b8SNobutomo Nakano# Luis, Argentina (standard time UTC-04) will keep Daylight Saving Time 3746f8e8937SDan McDonald# after April 11, 2010 - will continue to have same time as rest of 3750ba103b8SNobutomo Nakano# Argentina (UTC-3) (no DST). 3760ba103b8SNobutomo Nakano# 3776f8e8937SDan McDonald# Confirmaron la prórroga del huso horario de verano (Spanish) 3780ba103b8SNobutomo Nakano# http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9 3790ba103b8SNobutomo Nakano# or (some English translation): 3800ba103b8SNobutomo Nakano# http://www.worldtimezone.com/dst_news/dst_news_argentina08.html 3810ba103b8SNobutomo Nakano 3820ba103b8SNobutomo Nakano# From Mariano Absatz (2010-04-12): 3830ba103b8SNobutomo Nakano# yes...I can confirm this...and given that San Luis keeps calling 3840ba103b8SNobutomo Nakano# UTC-03:00 "summer time", we should't just let San Luis go back to "Arg" 3850ba103b8SNobutomo Nakano# rules...San Luis is still using "Western ARgentina Time" and it got 3860ba103b8SNobutomo Nakano# stuck on Summer daylight savings time even though the summer is over. 3870ba103b8SNobutomo Nakano 3883508b934SYuri Pankov# From Paul Eggert (2018-01-23): 389c2d5ab87SDan McDonald# Perhaps San Luis operates on the legal fiction that it is at -04 3903508b934SYuri Pankov# with perpetual daylight saving time, but ordinary usage typically seems to 391c2d5ab87SDan McDonald# just say it's at -03; see, for example, 392b654b02dSYuri Pankov# https://es.wikipedia.org/wiki/Hora_oficial_argentina 393a43ba736SRobert Mustacchi# We've documented similar situations as being plain changes to 394a43ba736SRobert Mustacchi# standard time, so let's do that here too. This does not change UTC 395a43ba736SRobert Mustacchi# offsets, only tm_isdst and the time zone abbreviations. One minor 396a43ba736SRobert Mustacchi# plus is that this silences a zic complaint that there's no POSIX TZ 39705e627dcSAndy Fiddaman# setting for timestamps past 2038. 398a43ba736SRobert Mustacchi 399374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 4007c478bd9Sstevel@tonic-gate# 4017c478bd9Sstevel@tonic-gate# Buenos Aires (BA), Capital Federal (CF), 4026f8e8937SDan McDonaldZone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31 403427b4c5cSAndy Fiddaman #STDOFF -4:16:48.25 4046f8e8937SDan McDonald -4:16:48 - CMT 1920 May # Córdoba Mean Time 405dafc4501SDan McDonald -4:00 - -04 1930 Dec 406dafc4501SDan McDonald -4:00 Arg -04/-03 1969 Oct 5 407dafc4501SDan McDonald -3:00 Arg -03/-02 1999 Oct 3 408dafc4501SDan McDonald -4:00 Arg -04/-03 2000 Mar 3 409dafc4501SDan McDonald -3:00 Arg -03/-02 4107c478bd9Sstevel@tonic-gate# 4116f8e8937SDan McDonald# Córdoba (CB), Santa Fe (SF), Entre Ríos (ER), Corrientes (CN), Misiones (MN), 4128e4c1c45SRobbin Kawabata# Chaco (CC), Formosa (FM), Santiago del Estero (SE) 4137c478bd9Sstevel@tonic-gate# 4142f9aa4a7Srobbin# Shanks & Pottenger also make the following claims, which we haven't verified: 4157c478bd9Sstevel@tonic-gate# - Formosa switched to -3:00 on 1991-01-07. 4167c478bd9Sstevel@tonic-gate# - Misiones switched to -3:00 on 1990-12-29. 4177c478bd9Sstevel@tonic-gate# - Chaco switched to -3:00 on 1991-01-04. 4187c478bd9Sstevel@tonic-gate# - Santiago del Estero switched to -4:00 on 1991-04-01, 4197c478bd9Sstevel@tonic-gate# then to -3:00 on 1991-04-26. 4207c478bd9Sstevel@tonic-gate# 421427b4c5cSAndy Fiddaman #STDOFF -4:16:48.25 4227c478bd9Sstevel@tonic-gateZone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31 4237c478bd9Sstevel@tonic-gate -4:16:48 - CMT 1920 May 424dafc4501SDan McDonald -4:00 - -04 1930 Dec 425dafc4501SDan McDonald -4:00 Arg -04/-03 1969 Oct 5 426dafc4501SDan McDonald -3:00 Arg -03/-02 1991 Mar 3 427dafc4501SDan McDonald -4:00 - -04 1991 Oct 20 428dafc4501SDan McDonald -3:00 Arg -03/-02 1999 Oct 3 429dafc4501SDan McDonald -4:00 Arg -04/-03 2000 Mar 3 430dafc4501SDan McDonald -3:00 Arg -03/-02 4317c478bd9Sstevel@tonic-gate# 4326f8e8937SDan McDonald# Salta (SA), La Pampa (LP), Neuquén (NQ), Rio Negro (RN) 4338e4c1c45SRobbin KawabataZone America/Argentina/Salta -4:21:40 - LMT 1894 Oct 31 434427b4c5cSAndy Fiddaman #STDOFF -4:16:48.25 4358e4c1c45SRobbin Kawabata -4:16:48 - CMT 1920 May 436dafc4501SDan McDonald -4:00 - -04 1930 Dec 437dafc4501SDan McDonald -4:00 Arg -04/-03 1969 Oct 5 438dafc4501SDan McDonald -3:00 Arg -03/-02 1991 Mar 3 439dafc4501SDan McDonald -4:00 - -04 1991 Oct 20 440dafc4501SDan McDonald -3:00 Arg -03/-02 1999 Oct 3 441dafc4501SDan McDonald -4:00 Arg -04/-03 2000 Mar 3 442dafc4501SDan McDonald -3:00 Arg -03/-02 2008 Oct 18 443dafc4501SDan McDonald -3:00 - -03 4448e4c1c45SRobbin Kawabata# 4456f8e8937SDan McDonald# Tucumán (TM) 4467c478bd9Sstevel@tonic-gateZone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31 447427b4c5cSAndy Fiddaman #STDOFF -4:16:48.25 4487c478bd9Sstevel@tonic-gate -4:16:48 - CMT 1920 May 449dafc4501SDan McDonald -4:00 - -04 1930 Dec 450dafc4501SDan McDonald -4:00 Arg -04/-03 1969 Oct 5 451dafc4501SDan McDonald -3:00 Arg -03/-02 1991 Mar 3 452dafc4501SDan McDonald -4:00 - -04 1991 Oct 20 453dafc4501SDan McDonald -3:00 Arg -03/-02 1999 Oct 3 454dafc4501SDan McDonald -4:00 Arg -04/-03 2000 Mar 3 455dafc4501SDan McDonald -3:00 - -03 2004 Jun 1 456dafc4501SDan McDonald -4:00 - -04 2004 Jun 13 457dafc4501SDan McDonald -3:00 Arg -03/-02 4587c478bd9Sstevel@tonic-gate# 4597c478bd9Sstevel@tonic-gate# La Rioja (LR) 4607c478bd9Sstevel@tonic-gateZone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31 461427b4c5cSAndy Fiddaman #STDOFF -4:16:48.25 4627c478bd9Sstevel@tonic-gate -4:16:48 - CMT 1920 May 463dafc4501SDan McDonald -4:00 - -04 1930 Dec 464dafc4501SDan McDonald -4:00 Arg -04/-03 1969 Oct 5 465dafc4501SDan McDonald -3:00 Arg -03/-02 1991 Mar 1 466dafc4501SDan McDonald -4:00 - -04 1991 May 7 467dafc4501SDan McDonald -3:00 Arg -03/-02 1999 Oct 3 468dafc4501SDan McDonald -4:00 Arg -04/-03 2000 Mar 3 469dafc4501SDan McDonald -3:00 - -03 2004 Jun 1 470dafc4501SDan McDonald -4:00 - -04 2004 Jun 20 471dafc4501SDan McDonald -3:00 Arg -03/-02 2008 Oct 18 472dafc4501SDan McDonald -3:00 - -03 4737c478bd9Sstevel@tonic-gate# 4747c478bd9Sstevel@tonic-gate# San Juan (SJ) 4757c478bd9Sstevel@tonic-gateZone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31 476427b4c5cSAndy Fiddaman #STDOFF -4:16:48.25 4777c478bd9Sstevel@tonic-gate -4:16:48 - CMT 1920 May 478dafc4501SDan McDonald -4:00 - -04 1930 Dec 479dafc4501SDan McDonald -4:00 Arg -04/-03 1969 Oct 5 480dafc4501SDan McDonald -3:00 Arg -03/-02 1991 Mar 1 481dafc4501SDan McDonald -4:00 - -04 1991 May 7 482dafc4501SDan McDonald -3:00 Arg -03/-02 1999 Oct 3 483dafc4501SDan McDonald -4:00 Arg -04/-03 2000 Mar 3 484dafc4501SDan McDonald -3:00 - -03 2004 May 31 485dafc4501SDan McDonald -4:00 - -04 2004 Jul 25 486dafc4501SDan McDonald -3:00 Arg -03/-02 2008 Oct 18 487dafc4501SDan McDonald -3:00 - -03 4887c478bd9Sstevel@tonic-gate# 4897c478bd9Sstevel@tonic-gate# Jujuy (JY) 4907c478bd9Sstevel@tonic-gateZone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31 491427b4c5cSAndy Fiddaman #STDOFF -4:16:48.25 4927c478bd9Sstevel@tonic-gate -4:16:48 - CMT 1920 May 493dafc4501SDan McDonald -4:00 - -04 1930 Dec 494dafc4501SDan McDonald -4:00 Arg -04/-03 1969 Oct 5 495dafc4501SDan McDonald -3:00 Arg -03/-02 1990 Mar 4 496dafc4501SDan McDonald -4:00 - -04 1990 Oct 28 497dafc4501SDan McDonald -4:00 1:00 -03 1991 Mar 17 498dafc4501SDan McDonald -4:00 - -04 1991 Oct 6 499dafc4501SDan McDonald -3:00 1:00 -02 1992 500dafc4501SDan McDonald -3:00 Arg -03/-02 1999 Oct 3 501dafc4501SDan McDonald -4:00 Arg -04/-03 2000 Mar 3 502dafc4501SDan McDonald -3:00 Arg -03/-02 2008 Oct 18 503dafc4501SDan McDonald -3:00 - -03 5047c478bd9Sstevel@tonic-gate# 50580868c53Srobbin# Catamarca (CT), Chubut (CH) 5067c478bd9Sstevel@tonic-gateZone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31 507427b4c5cSAndy Fiddaman #STDOFF -4:16:48.25 5087c478bd9Sstevel@tonic-gate -4:16:48 - CMT 1920 May 509dafc4501SDan McDonald -4:00 - -04 1930 Dec 510dafc4501SDan McDonald -4:00 Arg -04/-03 1969 Oct 5 511dafc4501SDan McDonald -3:00 Arg -03/-02 1991 Mar 3 512dafc4501SDan McDonald -4:00 - -04 1991 Oct 20 513dafc4501SDan McDonald -3:00 Arg -03/-02 1999 Oct 3 514dafc4501SDan McDonald -4:00 Arg -04/-03 2000 Mar 3 515dafc4501SDan McDonald -3:00 - -03 2004 Jun 1 516dafc4501SDan McDonald -4:00 - -04 2004 Jun 20 517dafc4501SDan McDonald -3:00 Arg -03/-02 2008 Oct 18 518dafc4501SDan McDonald -3:00 - -03 5197c478bd9Sstevel@tonic-gate# 5207c478bd9Sstevel@tonic-gate# Mendoza (MZ) 5217c478bd9Sstevel@tonic-gateZone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31 522427b4c5cSAndy Fiddaman #STDOFF -4:16:48.25 5237c478bd9Sstevel@tonic-gate -4:16:48 - CMT 1920 May 524dafc4501SDan McDonald -4:00 - -04 1930 Dec 525dafc4501SDan McDonald -4:00 Arg -04/-03 1969 Oct 5 526dafc4501SDan McDonald -3:00 Arg -03/-02 1990 Mar 4 527dafc4501SDan McDonald -4:00 - -04 1990 Oct 15 528dafc4501SDan McDonald -4:00 1:00 -03 1991 Mar 1 529dafc4501SDan McDonald -4:00 - -04 1991 Oct 15 530dafc4501SDan McDonald -4:00 1:00 -03 1992 Mar 1 531dafc4501SDan McDonald -4:00 - -04 1992 Oct 18 532dafc4501SDan McDonald -3:00 Arg -03/-02 1999 Oct 3 533dafc4501SDan McDonald -4:00 Arg -04/-03 2000 Mar 3 534dafc4501SDan McDonald -3:00 - -03 2004 May 23 535dafc4501SDan McDonald -4:00 - -04 2004 Sep 26 536dafc4501SDan McDonald -3:00 Arg -03/-02 2008 Oct 18 537dafc4501SDan McDonald -3:00 - -03 5387c478bd9Sstevel@tonic-gate# 5398593320bSrobbin# San Luis (SL) 5403254abe6SNobutomo Nakano 5410ba103b8SNobutomo NakanoRule SanLuis 2008 2009 - Mar Sun>=8 0:00 0 - 5423508b934SYuri PankovRule SanLuis 2007 2008 - Oct Sun>=8 0:00 1:00 - 5433254abe6SNobutomo Nakano 5448593320bSrobbinZone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31 545427b4c5cSAndy Fiddaman #STDOFF -4:16:48.25 5468593320bSrobbin -4:16:48 - CMT 1920 May 547dafc4501SDan McDonald -4:00 - -04 1930 Dec 548dafc4501SDan McDonald -4:00 Arg -04/-03 1969 Oct 5 549dafc4501SDan McDonald -3:00 Arg -03/-02 1990 550dafc4501SDan McDonald -3:00 1:00 -02 1990 Mar 14 551dafc4501SDan McDonald -4:00 - -04 1990 Oct 15 552dafc4501SDan McDonald -4:00 1:00 -03 1991 Mar 1 553dafc4501SDan McDonald -4:00 - -04 1991 Jun 1 554dafc4501SDan McDonald -3:00 - -03 1999 Oct 3 555dafc4501SDan McDonald -4:00 1:00 -03 2000 Mar 3 556dafc4501SDan McDonald -3:00 - -03 2004 May 31 557dafc4501SDan McDonald -4:00 - -04 2004 Jul 25 558dafc4501SDan McDonald -3:00 Arg -03/-02 2008 Jan 21 559dafc4501SDan McDonald -4:00 SanLuis -04/-03 2009 Oct 11 560dafc4501SDan McDonald -3:00 - -03 5618593320bSrobbin# 5627c478bd9Sstevel@tonic-gate# Santa Cruz (SC) 5636f8e8937SDan McDonaldZone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31 564427b4c5cSAndy Fiddaman #STDOFF -4:16:48.25 565dafc4501SDan McDonald -4:16:48 - CMT 1920 May 566dafc4501SDan McDonald -4:00 - -04 1930 Dec 567dafc4501SDan McDonald -4:00 Arg -04/-03 1969 Oct 5 568dafc4501SDan McDonald -3:00 Arg -03/-02 1999 Oct 3 569dafc4501SDan McDonald -4:00 Arg -04/-03 2000 Mar 3 570dafc4501SDan McDonald -3:00 - -03 2004 Jun 1 571dafc4501SDan McDonald -4:00 - -04 2004 Jun 20 572dafc4501SDan McDonald -3:00 Arg -03/-02 2008 Oct 18 573dafc4501SDan McDonald -3:00 - -03 5747c478bd9Sstevel@tonic-gate# 5756f8e8937SDan McDonald# Tierra del Fuego, Antártida e Islas del Atlántico Sur (TF) 5766f8e8937SDan McDonaldZone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31 577427b4c5cSAndy Fiddaman #STDOFF -4:16:48.25 578dafc4501SDan McDonald -4:16:48 - CMT 1920 May 579dafc4501SDan McDonald -4:00 - -04 1930 Dec 580dafc4501SDan McDonald -4:00 Arg -04/-03 1969 Oct 5 581dafc4501SDan McDonald -3:00 Arg -03/-02 1999 Oct 3 582dafc4501SDan McDonald -4:00 Arg -04/-03 2000 Mar 3 583dafc4501SDan McDonald -3:00 - -03 2004 May 30 584dafc4501SDan McDonald -4:00 - -04 2004 Jun 20 585dafc4501SDan McDonald -3:00 Arg -03/-02 2008 Oct 18 586dafc4501SDan McDonald -3:00 - -03 5877c478bd9Sstevel@tonic-gate 5887c478bd9Sstevel@tonic-gate# Bolivia 589374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 5907c478bd9Sstevel@tonic-gateZone America/La_Paz -4:32:36 - LMT 1890 5917c478bd9Sstevel@tonic-gate -4:32:36 - CMT 1931 Oct 15 # Calamarca MT 5924b8ee424SYuri Pankov -4:32:36 1:00 BST 1932 Mar 21 # Bolivia ST 593dafc4501SDan McDonald -4:00 - -04 5947c478bd9Sstevel@tonic-gate 5957c478bd9Sstevel@tonic-gate# Brazil 5967c478bd9Sstevel@tonic-gate 59780868c53Srobbin# From Paul Eggert (1993-11-18): 5987c478bd9Sstevel@tonic-gate# The mayor of Rio recently attempted to change the time zone rules 5997c478bd9Sstevel@tonic-gate# just in his city, in order to leave more summer time for the tourist trade. 6007c478bd9Sstevel@tonic-gate# The rule change lasted only part of the day; 6017c478bd9Sstevel@tonic-gate# the federal government refused to follow the city's rules, and business 6027c478bd9Sstevel@tonic-gate# was in a chaos, so the mayor backed down that afternoon. 6037c478bd9Sstevel@tonic-gate 6047c478bd9Sstevel@tonic-gate# From IATA SSIM (1996-02): 6057c478bd9Sstevel@tonic-gate# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS), 6066f8e8937SDan McDonald# Santa Catarina (SC), Paraná (PR), São Paulo (SP), Rio de Janeiro (RJ), 6076f8e8937SDan McDonald# Espírito Santo (ES), Minas Gerais (MG), Bahia (BA), Goiás (GO), 6087c478bd9Sstevel@tonic-gate# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL]. 6097c478bd9Sstevel@tonic-gate# [The last three states are new to this issue of the IATA SSIM.] 6107c478bd9Sstevel@tonic-gate 6117c478bd9Sstevel@tonic-gate# From Gwillim Law (1996-10-07): 6126f8e8937SDan McDonald# Geography, history (Tocantins was part of Goiás until 1989), and other 6137c478bd9Sstevel@tonic-gate# sources of time zone information lead me to believe that AL, SE, and TO were 6147c478bd9Sstevel@tonic-gate# always in BR1, and so the only change was whether or not they observed DST.... 6157c478bd9Sstevel@tonic-gate# The earliest issue of the SSIM I have is 2/91. Each issue from then until 6167c478bd9Sstevel@tonic-gate# 9/95 says that DST is observed only in the ten states I quoted from 9/95, 6177c478bd9Sstevel@tonic-gate# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2 6187c478bd9Sstevel@tonic-gate# (UTC-4).... The other two time zones given for Brazil are BR3, which is 6197c478bd9Sstevel@tonic-gate# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is 6207c478bd9Sstevel@tonic-gate# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's 6217c478bd9Sstevel@tonic-gate# become part of the state of Pernambuco). The boundary between BR1 and BR2 6227c478bd9Sstevel@tonic-gate# has never been clearly stated. They've simply been called East and West. 6237c478bd9Sstevel@tonic-gate# However, some conclusions can be drawn from another IATA manual: the Airline 6247c478bd9Sstevel@tonic-gate# Coding Directory, which lists close to 400 airports in Brazil. For each 6257c478bd9Sstevel@tonic-gate# airport it gives a time zone which is coded to the SSIM. From that 6266f8e8937SDan McDonald# information, I'm led to conclude that the states of Amapá (AP), Ceará (CE), 6276f8e8937SDan McDonald# Maranhão (MA), Paraíba (PR), Pernambuco (PE), Piauí (PI), and Rio Grande do 6286f8e8937SDan McDonald# Norte (RN), and the eastern part of Pará (PA) are all in BR1 without DST. 6297c478bd9Sstevel@tonic-gate 6307c478bd9Sstevel@tonic-gate# From Marcos Tadeu (1998-09-27): 6316f8e8937SDan McDonald# Brazilian official page <http://pcdsh01.on.br/verao1.html> 6327c478bd9Sstevel@tonic-gate 6336f8e8937SDan McDonald# From Jesper Nørgaard (2000-11-03): 6347c478bd9Sstevel@tonic-gate# [For an official list of which regions in Brazil use which time zones, see:] 6357c478bd9Sstevel@tonic-gate# http://pcdsh01.on.br/Fusbr.htm 6367c478bd9Sstevel@tonic-gate# http://pcdsh01.on.br/Fusbrhv.htm 6377c478bd9Sstevel@tonic-gate 6387c478bd9Sstevel@tonic-gate# From Celso Doria via David Madeo (2002-10-09): 6397c478bd9Sstevel@tonic-gate# The reason for the delay this year has to do with elections in Brazil. 6407c478bd9Sstevel@tonic-gate# 6417c478bd9Sstevel@tonic-gate# Unlike in the United States, elections in Brazil are 100% computerized and 6427c478bd9Sstevel@tonic-gate# the results are known almost immediately. Yesterday, it was the first 6437c478bd9Sstevel@tonic-gate# round of the elections when 115 million Brazilians voted for President, 6447c478bd9Sstevel@tonic-gate# Governor, Senators, Federal Deputies, and State Deputies. Nobody is 6457c478bd9Sstevel@tonic-gate# counting (or re-counting) votes anymore and we know there will be a second 6467c478bd9Sstevel@tonic-gate# round for the Presidency and also for some Governors. The 2nd round will 6477c478bd9Sstevel@tonic-gate# take place on October 27th. 6487c478bd9Sstevel@tonic-gate# 6497c478bd9Sstevel@tonic-gate# The reason why the DST will only begin November 3rd is that the thousands 6507c478bd9Sstevel@tonic-gate# of electoral machines used cannot have their time changed, and since the 6517c478bd9Sstevel@tonic-gate# Constitution says the elections must begin at 8:00 AM and end at 5:00 PM, 6527c478bd9Sstevel@tonic-gate# the Government decided to postpone DST, instead of changing the Constitution 6537c478bd9Sstevel@tonic-gate# (maybe, for the next elections, it will be possible to change the clock)... 6547c478bd9Sstevel@tonic-gate 6557c478bd9Sstevel@tonic-gate# From Rodrigo Severo (2004-10-04): 6567c478bd9Sstevel@tonic-gate# It's just the biannual change made necessary by the much hyped, supposedly 657427b4c5cSAndy Fiddaman# modern Brazilian ... voting machines which, apparently, can't deal 6587c478bd9Sstevel@tonic-gate# with a time change between the first and the second rounds of the elections. 6597c478bd9Sstevel@tonic-gate 660538f0434Srobbin# From Steffen Thorsen (2007-09-20): 661538f0434Srobbin# Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00: 662538f0434Srobbin# http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975 663538f0434Srobbin 66456725381Srobbin# From Paul Schulze (2008-06-24): 66556725381Srobbin# ...by law number 11.662 of April 24, 2008 (published in the "Diario 6666f8e8937SDan McDonald# Oficial da União"...) in Brazil there are changes in the timezones, 66756725381Srobbin# effective today (00:00am at June 24, 2008) as follows: 66856725381Srobbin# 6696f8e8937SDan McDonald# a) The timezone UTC+5 is extinguished, with all the Acre state and the 67056725381Srobbin# part of the Amazonas state that had this timezone now being put to the 67156725381Srobbin# timezone UTC+4 6726f8e8937SDan McDonald# b) The whole Pará state now is put at timezone UTC+3, instead of just 67356725381Srobbin# part of it, as was before. 67456725381Srobbin# 67556725381Srobbin# This change follows a proposal of senator Tiao Viana of Acre state, that 67656725381Srobbin# proposed it due to concerns about open television channels displaying 67756725381Srobbin# programs inappropriate to youths in the states that had the timezone 67856725381Srobbin# UTC+5 too early in the night. In the occasion, some more corrections 67956725381Srobbin# were proposed, trying to unify the timezones of any given state. This 68056725381Srobbin# change modifies timezone rules defined in decree 2.784 of 18 June, 68156725381Srobbin# 1913. 68256725381Srobbin 68356725381Srobbin# From Rodrigo Severo (2008-06-24): 68456725381Srobbin# Just correcting the URL: 685707182d7SNobutomo Nakano# https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008 68656725381Srobbin# 68756725381Srobbin# As a result of the above Decree I believe the America/Rio_Branco 68856725381Srobbin# timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall 6896f8e8937SDan McDonald# be created to represent the...west side of the Pará State. I 69056725381Srobbin# suggest this new timezone be called Santarem as the most 69156725381Srobbin# important/populated city in the affected area. 69256725381Srobbin# 69356725381Srobbin# This new timezone would be the same as the Rio_Branco timezone up to 69456725381Srobbin# the 2008/06/24 change which would be to UTC-3 instead of UTC-4. 69556725381Srobbin 69656725381Srobbin# From Alex Krivenyshev (2008-06-24): 69756725381Srobbin# This is a quick reference page for New and Old Brazil Time Zones map. 69856725381Srobbin# http://www.worldtimezone.com/brazil-time-new-old.php 69956725381Srobbin# 7006f8e8937SDan McDonald# - 4 time zones replaced by 3 time zones - eliminating time zone UTC-05 7016f8e8937SDan McDonald# (state Acre and the part of the Amazonas will be UTC/GMT-04) - western 7026f8e8937SDan McDonald# part of Par state is moving to one timezone UTC-03 (from UTC-04). 70356725381Srobbin 7047c478bd9Sstevel@tonic-gate# From Paul Eggert (2002-10-10): 7057c478bd9Sstevel@tonic-gate# The official decrees referenced below are mostly taken from 7066f8e8937SDan McDonald# Decretos sobre o Horário de Verão no Brasil. 7076f8e8937SDan McDonald# http://pcdsh01.on.br/DecHV.html 7087c478bd9Sstevel@tonic-gate 709376a7c81SRobbin Kawabata# From Steffen Thorsen (2008-08-29): 710376a7c81SRobbin Kawabata# As announced by the government and many newspapers in Brazil late 711376a7c81SRobbin Kawabata# yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and 712376a7c81SRobbin Kawabata# it will end on 2009-02-15 (current rule for Brazil is fine). Based on 713376a7c81SRobbin Kawabata# past years experience with the elections, there was a good chance that 714376a7c81SRobbin Kawabata# the start was postponed to November, but it did not happen this year. 715376a7c81SRobbin Kawabata# 716376a7c81SRobbin Kawabata# It has not yet been posted to http://pcdsh01.on.br/DecHV.html 717376a7c81SRobbin Kawabata# 718376a7c81SRobbin Kawabata# An official page about it: 719376a7c81SRobbin Kawabata# http://www.mme.gov.br/site/news/detail.do?newsId=16722 720376a7c81SRobbin Kawabata# Note that this link does not always work directly, but must be accessed 721376a7c81SRobbin Kawabata# by going to 722376a7c81SRobbin Kawabata# http://www.mme.gov.br/first 723376a7c81SRobbin Kawabata# 724376a7c81SRobbin Kawabata# One example link that works directly: 725376a7c81SRobbin Kawabata# http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54 726376a7c81SRobbin Kawabata# (Portuguese) 727376a7c81SRobbin Kawabata# 728376a7c81SRobbin Kawabata# We have a written a short article about it as well: 729b654b02dSYuri Pankov# https://www.timeanddate.com/news/time/brazil-dst-2008-2009.html 730abaa65c8SYuri Pankov# 731abaa65c8SYuri Pankov# From Alexander Krivenyshev (2011-10-04): 732abaa65c8SYuri Pankov# State Bahia will return to Daylight savings time this year after 8 years off. 733a43ba736SRobert Mustacchi# The announcement was made by Governor Jaques Wagner in an interview to a 734a43ba736SRobert Mustacchi# television station in Salvador. 735abaa65c8SYuri Pankov 736abaa65c8SYuri Pankov# In Portuguese: 737abaa65c8SYuri Pankov# http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html 738b654b02dSYuri Pankov# https://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html 739abaa65c8SYuri Pankov 740abaa65c8SYuri Pankov# From Guilherme Bernardes Rodrigues (2011-10-07): 741abaa65c8SYuri Pankov# There is news in the media, however there is still no decree about it. 7426f8e8937SDan McDonald# I just send a e-mail to Zulmira Brandao at http://pcdsh01.on.br/ the 743a43ba736SRobert Mustacchi# official agency about time in Brazil, and she confirmed that the old rule is 744abaa65c8SYuri Pankov# still in force. 745abaa65c8SYuri Pankov 746abaa65c8SYuri Pankov# From Guilherme Bernardes Rodrigues (2011-10-14) 747abaa65c8SYuri Pankov# It's official, the President signed a decree that includes Bahia in summer 748abaa65c8SYuri Pankov# time. 749abaa65c8SYuri Pankov# [ and in a second message (same day): ] 750abaa65c8SYuri Pankov# I found the decree. 751abaa65c8SYuri Pankov# 75256b82ca8SDan McDonald# DECRETO No. 7.584, DE 13 DE OUTUBRO DE 2011 753abaa65c8SYuri Pankov# Link : 754abaa65c8SYuri Pankov# http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6 755abaa65c8SYuri Pankov 756a43ba736SRobert Mustacchi# From Kelley Cook (2012-10-16): 757a43ba736SRobert Mustacchi# The governor of state of Bahia in Brazil announced on Thursday that 758a43ba736SRobert Mustacchi# due to public pressure, he is reversing the DST policy they implemented 759a43ba736SRobert Mustacchi# last year and will not be going to Summer Time on October 21st.... 760a43ba736SRobert Mustacchi# http://www.correio24horas.com.br/r/artigo/apos-pressoes-wagner-suspende-horario-de-verao-na-bahia 761a43ba736SRobert Mustacchi 762a43ba736SRobert Mustacchi# From Rodrigo Severo (2012-10-16): 763a43ba736SRobert Mustacchi# Tocantins state will have DST. 764b654b02dSYuri Pankov# https://noticias.terra.com.br/brasil/noticias/0,,OI6232536-EI306.html 765a43ba736SRobert Mustacchi 766a43ba736SRobert Mustacchi# From Steffen Thorsen (2013-09-20): 767a43ba736SRobert Mustacchi# Tocantins in Brazil is very likely not to observe DST from October.... 768a43ba736SRobert Mustacchi# http://conexaoto.com.br/2013/09/18/ministerio-confirma-que-tocantins-esta-fora-do-horario-de-verao-em-2013-mas-falta-publicacao-de-decreto 769a43ba736SRobert Mustacchi# We will keep this article updated when this is confirmed: 770b654b02dSYuri Pankov# https://www.timeanddate.com/news/time/brazil-starts-dst-2013.html 771a43ba736SRobert Mustacchi 772a43ba736SRobert Mustacchi# From Steffen Thorsen (2013-10-17): 773b654b02dSYuri Pankov# https://www.timeanddate.com/news/time/acre-amazonas-change-time-zone.html 774a43ba736SRobert Mustacchi# Senator Jorge Viana announced that Acre will change time zone on November 10. 775a43ba736SRobert Mustacchi# He did not specify the time of the change, nor if western parts of Amazonas 776a43ba736SRobert Mustacchi# will change as well. 777a43ba736SRobert Mustacchi# 778a43ba736SRobert Mustacchi# From Paul Eggert (2013-10-17): 779a43ba736SRobert Mustacchi# For now, assume western Amazonas will change as well. 780376a7c81SRobbin Kawabata 781f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 7826f8e8937SDan McDonald# Decree 20,466 <http://pcdsh01.on.br/HV20466.htm> (1931-10-01) 7836f8e8937SDan McDonald# Decree 21,896 <http://pcdsh01.on.br/HV21896.htm> (1932-01-10) 7843508b934SYuri PankovRule Brazil 1931 only - Oct 3 11:00 1:00 - 7857c478bd9Sstevel@tonic-gateRule Brazil 1932 1933 - Apr 1 0:00 0 - 7863508b934SYuri PankovRule Brazil 1932 only - Oct 3 0:00 1:00 - 7876f8e8937SDan McDonald# Decree 23,195 <http://pcdsh01.on.br/HV23195.htm> (1933-10-10) 7887c478bd9Sstevel@tonic-gate# revoked DST. 7896f8e8937SDan McDonald# Decree 27,496 <http://pcdsh01.on.br/HV27496.htm> (1949-11-24) 7906f8e8937SDan McDonald# Decree 27,998 <http://pcdsh01.on.br/HV27998.htm> (1950-04-13) 7913508b934SYuri PankovRule Brazil 1949 1952 - Dec 1 0:00 1:00 - 7927c478bd9Sstevel@tonic-gateRule Brazil 1950 only - Apr 16 1:00 0 - 7937c478bd9Sstevel@tonic-gateRule Brazil 1951 1952 - Apr 1 0:00 0 - 7946f8e8937SDan McDonald# Decree 32,308 <http://pcdsh01.on.br/HV32308.htm> (1953-02-24) 7957c478bd9Sstevel@tonic-gateRule Brazil 1953 only - Mar 1 0:00 0 - 7966f8e8937SDan McDonald# Decree 34,724 <http://pcdsh01.on.br/HV34724.htm> (1953-11-30) 7977c478bd9Sstevel@tonic-gate# revoked DST. 7986f8e8937SDan McDonald# Decree 52,700 <http://pcdsh01.on.br/HV52700.htm> (1963-10-18) 7997c478bd9Sstevel@tonic-gate# established DST from 1963-10-23 00:00 to 1964-02-29 00:00 8007c478bd9Sstevel@tonic-gate# in SP, RJ, GB, MG, ES, due to the prolongation of the drought. 8016f8e8937SDan McDonald# Decree 53,071 <http://pcdsh01.on.br/HV53071.htm> (1963-12-03) 8027c478bd9Sstevel@tonic-gate# extended the above decree to all of the national territory on 12-09. 8033508b934SYuri PankovRule Brazil 1963 only - Dec 9 0:00 1:00 - 8046f8e8937SDan McDonald# Decree 53,604 <http://pcdsh01.on.br/HV53604.htm> (1964-02-25) 8057c478bd9Sstevel@tonic-gate# extended summer time by one day to 1964-03-01 00:00 (start of school). 8067c478bd9Sstevel@tonic-gateRule Brazil 1964 only - Mar 1 0:00 0 - 8076f8e8937SDan McDonald# Decree 55,639 <http://pcdsh01.on.br/HV55639.htm> (1965-01-27) 8083508b934SYuri PankovRule Brazil 1965 only - Jan 31 0:00 1:00 - 8097c478bd9Sstevel@tonic-gateRule Brazil 1965 only - Mar 31 0:00 0 - 8106f8e8937SDan McDonald# Decree 57,303 <http://pcdsh01.on.br/HV57303.htm> (1965-11-22) 8113508b934SYuri PankovRule Brazil 1965 only - Dec 1 0:00 1:00 - 8126f8e8937SDan McDonald# Decree 57,843 <http://pcdsh01.on.br/HV57843.htm> (1966-02-18) 8137c478bd9Sstevel@tonic-gateRule Brazil 1966 1968 - Mar 1 0:00 0 - 8143508b934SYuri PankovRule Brazil 1966 1967 - Nov 1 0:00 1:00 - 8156f8e8937SDan McDonald# Decree 63,429 <http://pcdsh01.on.br/HV63429.htm> (1968-10-15) 8167c478bd9Sstevel@tonic-gate# revoked DST. 8176f8e8937SDan McDonald# Decree 91,698 <http://pcdsh01.on.br/HV91698.htm> (1985-09-27) 8183508b934SYuri PankovRule Brazil 1985 only - Nov 2 0:00 1:00 - 8197c478bd9Sstevel@tonic-gate# Decree 92,310 (1986-01-21) 8207c478bd9Sstevel@tonic-gate# Decree 92,463 (1986-03-13) 8217c478bd9Sstevel@tonic-gateRule Brazil 1986 only - Mar 15 0:00 0 - 8227c478bd9Sstevel@tonic-gate# Decree 93,316 (1986-10-01) 8233508b934SYuri PankovRule Brazil 1986 only - Oct 25 0:00 1:00 - 8247c478bd9Sstevel@tonic-gateRule Brazil 1987 only - Feb 14 0:00 0 - 8256f8e8937SDan McDonald# Decree 94,922 <http://pcdsh01.on.br/HV94922.htm> (1987-09-22) 8263508b934SYuri PankovRule Brazil 1987 only - Oct 25 0:00 1:00 - 8277c478bd9Sstevel@tonic-gateRule Brazil 1988 only - Feb 7 0:00 0 - 8286f8e8937SDan McDonald# Decree 96,676 <http://pcdsh01.on.br/HV96676.htm> (1988-09-12) 8297c478bd9Sstevel@tonic-gate# except for the states of AC, AM, PA, RR, RO, and AP (then a territory) 8303508b934SYuri PankovRule Brazil 1988 only - Oct 16 0:00 1:00 - 8317c478bd9Sstevel@tonic-gateRule Brazil 1989 only - Jan 29 0:00 0 - 8326f8e8937SDan McDonald# Decree 98,077 <http://pcdsh01.on.br/HV98077.htm> (1989-08-21) 8337c478bd9Sstevel@tonic-gate# with the same exceptions 8343508b934SYuri PankovRule Brazil 1989 only - Oct 15 0:00 1:00 - 8357c478bd9Sstevel@tonic-gateRule Brazil 1990 only - Feb 11 0:00 0 - 8366f8e8937SDan McDonald# Decree 99,530 <http://pcdsh01.on.br/HV99530.htm> (1990-09-17) 8377c478bd9Sstevel@tonic-gate# adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF. 8387c478bd9Sstevel@tonic-gate# Decree 99,629 (1990-10-19) adds BA, MT. 8393508b934SYuri PankovRule Brazil 1990 only - Oct 21 0:00 1:00 - 8407c478bd9Sstevel@tonic-gateRule Brazil 1991 only - Feb 17 0:00 0 - 8416f8e8937SDan McDonald# Unnumbered decree <http://pcdsh01.on.br/HV1991.htm> (1991-09-25) 8427c478bd9Sstevel@tonic-gate# adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF. 8433508b934SYuri PankovRule Brazil 1991 only - Oct 20 0:00 1:00 - 8447c478bd9Sstevel@tonic-gateRule Brazil 1992 only - Feb 9 0:00 0 - 8456f8e8937SDan McDonald# Unnumbered decree <http://pcdsh01.on.br/HV1992.htm> (1992-10-16) 8467c478bd9Sstevel@tonic-gate# adopted by same states. 8473508b934SYuri PankovRule Brazil 1992 only - Oct 25 0:00 1:00 - 8487c478bd9Sstevel@tonic-gateRule Brazil 1993 only - Jan 31 0:00 0 - 8496f8e8937SDan McDonald# Decree 942 <http://pcdsh01.on.br/HV942.htm> (1993-09-28) 8507c478bd9Sstevel@tonic-gate# adopted by same states, plus AM. 8516f8e8937SDan McDonald# Decree 1,252 <http://pcdsh01.on.br/HV1252.htm> (1994-09-22; 8527c478bd9Sstevel@tonic-gate# web page corrected 2004-01-07) adopted by same states, minus AM. 8536f8e8937SDan McDonald# Decree 1,636 <http://pcdsh01.on.br/HV1636.htm> (1995-09-14) 8547c478bd9Sstevel@tonic-gate# adopted by same states, plus MT and TO. 8556f8e8937SDan McDonald# Decree 1,674 <http://pcdsh01.on.br/HV1674.htm> (1995-10-13) 8567c478bd9Sstevel@tonic-gate# adds AL, SE. 8573508b934SYuri PankovRule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 - 8587c478bd9Sstevel@tonic-gateRule Brazil 1994 1995 - Feb Sun>=15 0:00 0 - 8597c478bd9Sstevel@tonic-gateRule Brazil 1996 only - Feb 11 0:00 0 - 8606f8e8937SDan McDonald# Decree 2,000 <http://pcdsh01.on.br/HV2000.htm> (1996-09-04) 8617c478bd9Sstevel@tonic-gate# adopted by same states, minus AL, SE. 8623508b934SYuri PankovRule Brazil 1996 only - Oct 6 0:00 1:00 - 8637c478bd9Sstevel@tonic-gateRule Brazil 1997 only - Feb 16 0:00 0 - 86480868c53Srobbin# From Daniel C. Sobral (1998-02-12): 8657c478bd9Sstevel@tonic-gate# In 1997, the DS began on October 6. The stated reason was that 8667c478bd9Sstevel@tonic-gate# because international television networks ignored Brazil's policy on DS, 8677c478bd9Sstevel@tonic-gate# they bought the wrong times on satellite for coverage of Pope's visit. 8687c478bd9Sstevel@tonic-gate# This year, the ending date of DS was postponed to March 1 8697c478bd9Sstevel@tonic-gate# to help dealing with the shortages of electric power. 8707c478bd9Sstevel@tonic-gate# 8717c478bd9Sstevel@tonic-gate# Decree 2,317 (1997-09-04), adopted by same states. 8723508b934SYuri PankovRule Brazil 1997 only - Oct 6 0:00 1:00 - 8736f8e8937SDan McDonald# Decree 2,495 <http://pcdsh01.on.br/figuras/HV2495.JPG> 8747c478bd9Sstevel@tonic-gate# (1998-02-10) 8757c478bd9Sstevel@tonic-gateRule Brazil 1998 only - Mar 1 0:00 0 - 8766f8e8937SDan McDonald# Decree 2,780 <http://pcdsh01.on.br/figuras/Hv98.jpg> (1998-09-11) 8777c478bd9Sstevel@tonic-gate# adopted by the same states as before. 8783508b934SYuri PankovRule Brazil 1998 only - Oct 11 0:00 1:00 - 8797c478bd9Sstevel@tonic-gateRule Brazil 1999 only - Feb 21 0:00 0 - 8806f8e8937SDan McDonald# Decree 3,150 <http://pcdsh01.on.br/figuras/HV3150.gif> 8817c478bd9Sstevel@tonic-gate# (1999-08-23) adopted by same states. 8826f8e8937SDan McDonald# Decree 3,188 <http://pcdsh01.on.br/DecHV99.gif> (1999-09-30) 8837c478bd9Sstevel@tonic-gate# adds SE, AL, PB, PE, RN, CE, PI, MA and RR. 8843508b934SYuri PankovRule Brazil 1999 only - Oct 3 0:00 1:00 - 8857c478bd9Sstevel@tonic-gateRule Brazil 2000 only - Feb 27 0:00 0 - 8866f8e8937SDan McDonald# Decree 3,592 <http://pcdsh01.on.br/DEC3592.htm> (2000-09-06) 8877c478bd9Sstevel@tonic-gate# adopted by the same states as before. 8886f8e8937SDan McDonald# Decree 3,630 <http://pcdsh01.on.br/Dec3630.jpg> (2000-10-13) 8897c478bd9Sstevel@tonic-gate# repeals DST in PE and RR, effective 2000-10-15 00:00. 8906f8e8937SDan McDonald# Decree 3,632 <http://pcdsh01.on.br/Dec3632.jpg> (2000-10-17) 8917c478bd9Sstevel@tonic-gate# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00. 8926f8e8937SDan McDonald# Decree 3,916 <http://pcdsh01.on.br/figuras/HV3916.gif> 8937c478bd9Sstevel@tonic-gate# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE. 8943508b934SYuri PankovRule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 - 8952f9aa4a7SrobbinRule Brazil 2001 2006 - Feb Sun>=15 0:00 0 - 8967c478bd9Sstevel@tonic-gate# Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE. 8976f8e8937SDan McDonald# 4,399 <http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm> 8983508b934SYuri PankovRule Brazil 2002 only - Nov 3 0:00 1:00 - 8997c478bd9Sstevel@tonic-gate# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO. 9006f8e8937SDan McDonald# 4,844 <http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm> 9013508b934SYuri PankovRule Brazil 2003 only - Oct 19 0:00 1:00 - 9027c478bd9Sstevel@tonic-gate# Decree 5,223 (2004-10-01) reestablishes DST in MT. 9036f8e8937SDan McDonald# 5,223 <http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm> 9043508b934SYuri PankovRule Brazil 2004 only - Nov 2 0:00 1:00 - 9056f8e8937SDan McDonald# Decree 5,539 <http://pcdsh01.on.br/DecHV5539.gif> (2005-09-19), 90680868c53Srobbin# adopted by the same states as before. 9073508b934SYuri PankovRule Brazil 2005 only - Oct 16 0:00 1:00 - 9086f8e8937SDan McDonald# Decree 5,920 <http://pcdsh01.on.br/DecHV5920.gif> (2006-10-03), 909538f0434Srobbin# adopted by the same states as before. 9103508b934SYuri PankovRule Brazil 2006 only - Nov 5 0:00 1:00 - 911538f0434SrobbinRule Brazil 2007 only - Feb 25 0:00 0 - 9126f8e8937SDan McDonald# Decree 6,212 <http://pcdsh01.on.br/DecHV6212.gif> (2007-09-26), 91356725381Srobbin# adopted by the same states as before. 9143508b934SYuri PankovRule Brazil 2007 only - Oct Sun>=8 0:00 1:00 - 915376a7c81SRobbin Kawabata# From Frederico A. C. Neves (2008-09-10): 916a43ba736SRobert Mustacchi# According to this decree 917376a7c81SRobbin Kawabata# http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm 918376a7c81SRobbin Kawabata# [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the 919376a7c81SRobbin Kawabata# 3rd Feb Sunday. There is an exception on the return date when this is 920376a7c81SRobbin Kawabata# the Carnival Sunday then the return date will be the next Sunday... 9213508b934SYuri PankovRule Brazil 2008 2017 - Oct Sun>=15 0:00 1:00 - 922376a7c81SRobbin KawabataRule Brazil 2008 2011 - Feb Sun>=15 0:00 0 - 9234b8ee424SYuri Pankov# Decree 7,584 <http://pcdsh01.on.br/HVdecreto7584_20111013.jpg> (2011-10-13) 9244b8ee424SYuri Pankov# added Bahia. 925376a7c81SRobbin KawabataRule Brazil 2012 only - Feb Sun>=22 0:00 0 - 9264b8ee424SYuri Pankov# Decree 7,826 <http://pcdsh01.on.br/HVdecreto7826_20121015.jpg> (2012-10-15) 9274b8ee424SYuri Pankov# removed Bahia and added Tocantins. 9284b8ee424SYuri Pankov# Decree 8,112 <http://pcdsh01.on.br/HVdecreto8112_20130930.JPG> (2013-09-30) 9294b8ee424SYuri Pankov# removed Tocantins. 930376a7c81SRobbin KawabataRule Brazil 2013 2014 - Feb Sun>=15 0:00 0 - 931376a7c81SRobbin KawabataRule Brazil 2015 only - Feb Sun>=22 0:00 0 - 932374df668SAndy FiddamanRule Brazil 2016 2019 - Feb Sun>=15 0:00 0 - 9334b8ee424SYuri Pankov# From Steffen Thorsen (2017-12-18): 9344b8ee424SYuri Pankov# According to many media sources, next year's DST start in Brazil will move to 935374df668SAndy Fiddaman# the first Sunday of November 9364b8ee424SYuri Pankov# ... https://www.timeanddate.com/news/time/brazil-delays-dst-2018.html 9374b8ee424SYuri Pankov# From Steffen Thorsen (2017-12-20): 9384b8ee424SYuri Pankov# http://www.planalto.gov.br/ccivil_03/_ato2015-2018/2017/decreto/D9242.htm 93905e627dcSAndy Fiddaman# From Fábio Gomes (2018-10-04): 94005e627dcSAndy Fiddaman# The Brazilian president just announced a new change on this year DST. 94105e627dcSAndy Fiddaman# It was scheduled to start on November 4th and it was changed to November 18th. 94205e627dcSAndy Fiddaman# From Rodrigo Brüning Wessler (2018-10-15): 94305e627dcSAndy Fiddaman# The Brazilian government just announced that the change in DST was 94405e627dcSAndy Fiddaman# canceled.... Maybe the president Michel Temer also woke up one hour 94505e627dcSAndy Fiddaman# earlier today. :) 946374df668SAndy FiddamanRule Brazil 2018 only - Nov Sun>=1 0:00 1:00 - 947374df668SAndy Fiddaman# The last ruleset listed above says that the following states observed DST: 9487c478bd9Sstevel@tonic-gate# DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP. 949374df668SAndy Fiddaman# 950374df668SAndy Fiddaman# From Steffen Thorsen (2019-04-05): 951374df668SAndy Fiddaman# According to multiple sources the Brazilian president wants to get rid of DST. 952374df668SAndy Fiddaman# https://gmconline.com.br/noticias/politica/bolsonaro-horario-de-verao-deve-acabar-este-ano 953374df668SAndy Fiddaman# https://g1.globo.com/economia/noticia/2019/04/05/governo-anuncia-fim-do-horario-de-verao.ghtml 954374df668SAndy Fiddaman# From Marcus Diniz (2019-04-25): 955374df668SAndy Fiddaman# Brazil no longer has DST changes - decree signed today 956374df668SAndy Fiddaman# https://g1.globo.com/politica/noticia/2019/04/25/bolsonaro-assina-decreto-que-acaba-com-o-horario-de-verao.ghtml 957374df668SAndy Fiddaman# From Daniel Soares de Oliveira (2019-04-26): 958374df668SAndy Fiddaman# http://www.planalto.gov.br/ccivil_03/_Ato2019-2022/2019/Decreto/D9772.htm 9597c478bd9Sstevel@tonic-gate 960374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 9617c478bd9Sstevel@tonic-gate# 9627c478bd9Sstevel@tonic-gate# Fernando de Noronha (administratively part of PE) 9637c478bd9Sstevel@tonic-gateZone America/Noronha -2:09:40 - LMT 1914 964dafc4501SDan McDonald -2:00 Brazil -02/-01 1990 Sep 17 965dafc4501SDan McDonald -2:00 - -02 1999 Sep 30 966dafc4501SDan McDonald -2:00 Brazil -02/-01 2000 Oct 15 967dafc4501SDan McDonald -2:00 - -02 2001 Sep 13 968dafc4501SDan McDonald -2:00 Brazil -02/-01 2002 Oct 1 969dafc4501SDan McDonald -2:00 - -02 9707c478bd9Sstevel@tonic-gate# Other Atlantic islands have no permanent settlement. 9716f8e8937SDan McDonald# These include Trindade and Martim Vaz (administratively part of ES), 9726f8e8937SDan McDonald# Rocas Atoll (RN), and the St Peter and St Paul Archipelago (PE). 9737c478bd9Sstevel@tonic-gate# Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01; 9747c478bd9Sstevel@tonic-gate# it also included the Penedos. 9757c478bd9Sstevel@tonic-gate# 9766f8e8937SDan McDonald# Amapá (AP), east Pará (PA) 9776f8e8937SDan McDonald# East Pará includes Belém, Marabá, Serra Norte, and São Félix do Xingu. 9786f8e8937SDan McDonald# The division between east and west Pará is the river Xingu. 9797c478bd9Sstevel@tonic-gate# In the north a very small part from the river Javary (now Jari I guess, 9806f8e8937SDan McDonald# the border with Amapá) to the Amazon, then to the Xingu. 9817c478bd9Sstevel@tonic-gateZone America/Belem -3:13:56 - LMT 1914 982dafc4501SDan McDonald -3:00 Brazil -03/-02 1988 Sep 12 983dafc4501SDan McDonald -3:00 - -03 9847c478bd9Sstevel@tonic-gate# 9856f8e8937SDan McDonald# west Pará (PA) 9866f8e8937SDan McDonald# West Pará includes Altamira, Óbidos, Prainha, Oriximiná, and Santarém. 98756725381SrobbinZone America/Santarem -3:38:48 - LMT 1914 988dafc4501SDan McDonald -4:00 Brazil -04/-03 1988 Sep 12 989dafc4501SDan McDonald -4:00 - -04 2008 Jun 24 0:00 990dafc4501SDan McDonald -3:00 - -03 99156725381Srobbin# 9926f8e8937SDan McDonald# Maranhão (MA), Piauí (PI), Ceará (CE), Rio Grande do Norte (RN), 9936f8e8937SDan McDonald# Paraíba (PB) 9947c478bd9Sstevel@tonic-gateZone America/Fortaleza -2:34:00 - LMT 1914 995dafc4501SDan McDonald -3:00 Brazil -03/-02 1990 Sep 17 996dafc4501SDan McDonald -3:00 - -03 1999 Sep 30 997dafc4501SDan McDonald -3:00 Brazil -03/-02 2000 Oct 22 998dafc4501SDan McDonald -3:00 - -03 2001 Sep 13 999dafc4501SDan McDonald -3:00 Brazil -03/-02 2002 Oct 1 1000dafc4501SDan McDonald -3:00 - -03 10017c478bd9Sstevel@tonic-gate# 10027c478bd9Sstevel@tonic-gate# Pernambuco (PE) (except Atlantic islands) 10037c478bd9Sstevel@tonic-gateZone America/Recife -2:19:36 - LMT 1914 1004dafc4501SDan McDonald -3:00 Brazil -03/-02 1990 Sep 17 1005dafc4501SDan McDonald -3:00 - -03 1999 Sep 30 1006dafc4501SDan McDonald -3:00 Brazil -03/-02 2000 Oct 15 1007dafc4501SDan McDonald -3:00 - -03 2001 Sep 13 1008dafc4501SDan McDonald -3:00 Brazil -03/-02 2002 Oct 1 1009dafc4501SDan McDonald -3:00 - -03 10107c478bd9Sstevel@tonic-gate# 10117c478bd9Sstevel@tonic-gate# Tocantins (TO) 10127c478bd9Sstevel@tonic-gateZone America/Araguaina -3:12:48 - LMT 1914 1013dafc4501SDan McDonald -3:00 Brazil -03/-02 1990 Sep 17 1014dafc4501SDan McDonald -3:00 - -03 1995 Sep 14 1015dafc4501SDan McDonald -3:00 Brazil -03/-02 2003 Sep 24 1016dafc4501SDan McDonald -3:00 - -03 2012 Oct 21 1017dafc4501SDan McDonald -3:00 Brazil -03/-02 2013 Sep 1018dafc4501SDan McDonald -3:00 - -03 10197c478bd9Sstevel@tonic-gate# 10207c478bd9Sstevel@tonic-gate# Alagoas (AL), Sergipe (SE) 10217c478bd9Sstevel@tonic-gateZone America/Maceio -2:22:52 - LMT 1914 1022dafc4501SDan McDonald -3:00 Brazil -03/-02 1990 Sep 17 1023dafc4501SDan McDonald -3:00 - -03 1995 Oct 13 1024dafc4501SDan McDonald -3:00 Brazil -03/-02 1996 Sep 4 1025dafc4501SDan McDonald -3:00 - -03 1999 Sep 30 1026dafc4501SDan McDonald -3:00 Brazil -03/-02 2000 Oct 22 1027dafc4501SDan McDonald -3:00 - -03 2001 Sep 13 1028dafc4501SDan McDonald -3:00 Brazil -03/-02 2002 Oct 1 1029dafc4501SDan McDonald -3:00 - -03 10307c478bd9Sstevel@tonic-gate# 10317c478bd9Sstevel@tonic-gate# Bahia (BA) 10327c478bd9Sstevel@tonic-gate# There are too many Salvadors elsewhere, so use America/Bahia instead 10337c478bd9Sstevel@tonic-gate# of America/Salvador. 10347c478bd9Sstevel@tonic-gateZone America/Bahia -2:34:04 - LMT 1914 1035dafc4501SDan McDonald -3:00 Brazil -03/-02 2003 Sep 24 1036dafc4501SDan McDonald -3:00 - -03 2011 Oct 16 1037dafc4501SDan McDonald -3:00 Brazil -03/-02 2012 Oct 21 1038dafc4501SDan McDonald -3:00 - -03 10397c478bd9Sstevel@tonic-gate# 10406f8e8937SDan McDonald# Goiás (GO), Distrito Federal (DF), Minas Gerais (MG), 10416f8e8937SDan McDonald# Espírito Santo (ES), Rio de Janeiro (RJ), São Paulo (SP), Paraná (PR), 10427c478bd9Sstevel@tonic-gate# Santa Catarina (SC), Rio Grande do Sul (RS) 10437c478bd9Sstevel@tonic-gateZone America/Sao_Paulo -3:06:28 - LMT 1914 1044dafc4501SDan McDonald -3:00 Brazil -03/-02 1963 Oct 23 0:00 1045dafc4501SDan McDonald -3:00 1:00 -02 1964 1046dafc4501SDan McDonald -3:00 Brazil -03/-02 10477c478bd9Sstevel@tonic-gate# 10487c478bd9Sstevel@tonic-gate# Mato Grosso do Sul (MS) 10497c478bd9Sstevel@tonic-gateZone America/Campo_Grande -3:38:28 - LMT 1914 1050dafc4501SDan McDonald -4:00 Brazil -04/-03 10517c478bd9Sstevel@tonic-gate# 10527c478bd9Sstevel@tonic-gate# Mato Grosso (MT) 10537c478bd9Sstevel@tonic-gateZone America/Cuiaba -3:44:20 - LMT 1914 1054dafc4501SDan McDonald -4:00 Brazil -04/-03 2003 Sep 24 1055dafc4501SDan McDonald -4:00 - -04 2004 Oct 1 1056dafc4501SDan McDonald -4:00 Brazil -04/-03 10577c478bd9Sstevel@tonic-gate# 10586f8e8937SDan McDonald# Rondônia (RO) 10597c478bd9Sstevel@tonic-gateZone America/Porto_Velho -4:15:36 - LMT 1914 1060dafc4501SDan McDonald -4:00 Brazil -04/-03 1988 Sep 12 1061dafc4501SDan McDonald -4:00 - -04 10627c478bd9Sstevel@tonic-gate# 10637c478bd9Sstevel@tonic-gate# Roraima (RR) 10647c478bd9Sstevel@tonic-gateZone America/Boa_Vista -4:02:40 - LMT 1914 1065dafc4501SDan McDonald -4:00 Brazil -04/-03 1988 Sep 12 1066dafc4501SDan McDonald -4:00 - -04 1999 Sep 30 1067dafc4501SDan McDonald -4:00 Brazil -04/-03 2000 Oct 15 1068dafc4501SDan McDonald -4:00 - -04 10697c478bd9Sstevel@tonic-gate# 10706f8e8937SDan McDonald# east Amazonas (AM): Boca do Acre, Jutaí, Manaus, Floriano Peixoto 10717c478bd9Sstevel@tonic-gate# The great circle line from Tabatinga to Porto Acre divides 10727c478bd9Sstevel@tonic-gate# east from west Amazonas. 10737c478bd9Sstevel@tonic-gateZone America/Manaus -4:00:04 - LMT 1914 1074dafc4501SDan McDonald -4:00 Brazil -04/-03 1988 Sep 12 1075dafc4501SDan McDonald -4:00 - -04 1993 Sep 28 1076dafc4501SDan McDonald -4:00 Brazil -04/-03 1994 Sep 22 1077dafc4501SDan McDonald -4:00 - -04 10787c478bd9Sstevel@tonic-gate# 10797c478bd9Sstevel@tonic-gate# west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant, 10806f8e8937SDan McDonald# Eirunepé, Envira, Ipixuna 10817c478bd9Sstevel@tonic-gateZone America/Eirunepe -4:39:28 - LMT 1914 1082dafc4501SDan McDonald -5:00 Brazil -05/-04 1988 Sep 12 1083dafc4501SDan McDonald -5:00 - -05 1993 Sep 28 1084dafc4501SDan McDonald -5:00 Brazil -05/-04 1994 Sep 22 1085dafc4501SDan McDonald -5:00 - -05 2008 Jun 24 0:00 1086dafc4501SDan McDonald -4:00 - -04 2013 Nov 10 1087dafc4501SDan McDonald -5:00 - -05 10887c478bd9Sstevel@tonic-gate# 10897c478bd9Sstevel@tonic-gate# Acre (AC) 10907c478bd9Sstevel@tonic-gateZone America/Rio_Branco -4:31:12 - LMT 1914 1091dafc4501SDan McDonald -5:00 Brazil -05/-04 1988 Sep 12 1092dafc4501SDan McDonald -5:00 - -05 2008 Jun 24 0:00 1093dafc4501SDan McDonald -4:00 - -04 2013 Nov 10 1094dafc4501SDan McDonald -5:00 - -05 10957c478bd9Sstevel@tonic-gate 10967c478bd9Sstevel@tonic-gate# Chile 10977c478bd9Sstevel@tonic-gate 10982de2fd87SAndy Fiddaman# From Paul Eggert (2022-03-15): 109956b82ca8SDan McDonald# Shanks & Pottenger says America/Santiago introduced standard time in 11004b8ee424SYuri Pankov# 1890 and rounds its UT offset to 70W40; guess that in practice this 110156b82ca8SDan McDonald# was the same offset as in 1916-1919. It also says Pacific/Easter 110256b82ca8SDan McDonald# standardized on 109W22 in 1890; assume this didn't change the clocks. 110356b82ca8SDan McDonald# 110456b82ca8SDan McDonald# Dates for America/Santiago from 1910 to 2004 are primarily from 110556b82ca8SDan McDonald# the following source, cited by Oscar van Vlijmen (2006-10-08): 110656b82ca8SDan McDonald# [1] Chile Law 110756b82ca8SDan McDonald# http://www.webexhibits.org/daylightsaving/chile.html 1108b654b02dSYuri Pankov# This contains a copy of this official table: 110956b82ca8SDan McDonald# Cambios en la hora oficial de Chile desde 1900 (retrieved 2008-03-30) 1110b654b02dSYuri Pankov# https://web.archive.org/web/20080330200901/http://www.horaoficial.cl/cambio.htm 111156b82ca8SDan McDonald# [1] needs several corrections, though. 111256b82ca8SDan McDonald# 111356b82ca8SDan McDonald# The first set of corrections is from: 111456b82ca8SDan McDonald# [2] History of the Official Time of Chile 111556b82ca8SDan McDonald# http://www.horaoficial.cl/ing/horaof_ing.html (retrieved 2012-03-06). See: 1116b654b02dSYuri Pankov# https://web.archive.org/web/20120306042032/http://www.horaoficial.cl/ing/horaof_ing.html 111756b82ca8SDan McDonald# This is an English translation of: 111856b82ca8SDan McDonald# Historia de la hora oficial de Chile (retrieved 2012-10-24). See: 1119b654b02dSYuri Pankov# https://web.archive.org/web/20121024234627/http://www.horaoficial.cl/horaof.htm 112056b82ca8SDan McDonald# A fancier Spanish version (requiring mouse-clicking) is at: 11212de2fd87SAndy Fiddaman# http://www.horaoficial.cl/historia_hora.php 112256b82ca8SDan McDonald# Conflicts between [1] and [2] were resolved as follows: 112356b82ca8SDan McDonald# 112456b82ca8SDan McDonald# - [1] says the 1910 transition was Jan 1, [2] says Jan 10 and cites 112556b82ca8SDan McDonald# Boletín No. 1, Aviso No. 1 (1910). Go with [2]. 112656b82ca8SDan McDonald# 112756b82ca8SDan McDonald# - [1] says SMT was -4:42:45, [2] says Chile's official time from 112856b82ca8SDan McDonald# 1916 to 1919 was -4:42:46.3, the meridian of Chile's National 112956b82ca8SDan McDonald# Astronomical Observatory (OAN), then located in what is now 11302de2fd87SAndy Fiddaman# Quinta Normal in Santiago. Go with [1], as this matches the meridian 11312de2fd87SAndy Fiddaman# referred to by the relevant Chilean laws to this day. 113256b82ca8SDan McDonald# 113356b82ca8SDan McDonald# - [1] says the 1918 transition was Sep 1, [2] says Sep 10 and cites 113456b82ca8SDan McDonald# Boletín No. 22, Aviso No. 129/1918 (1918-08-23). Go with [2]. 113556b82ca8SDan McDonald# 113656b82ca8SDan McDonald# - [1] does not give times for transitions; assume they occur 113756b82ca8SDan McDonald# at midnight mainland time, the current common practice. However, 113856b82ca8SDan McDonald# go with [2]'s specification of 23:00 for the 1947-05-21 transition. 113956b82ca8SDan McDonald# 114056b82ca8SDan McDonald# Another correction to [1] is from Jesper Nørgaard Welen, who 114156b82ca8SDan McDonald# wrote (2006-10-08), "I think that there are some obvious mistakes in 114256b82ca8SDan McDonald# the suggested link from Oscar van Vlijmen,... for instance entry 66 114356b82ca8SDan McDonald# says that GMT-4 ended 1990-09-12 while entry 67 only begins GMT-3 at 114456b82ca8SDan McDonald# 1990-09-15 (they should have been 1990-09-15 and 1990-09-16 114556b82ca8SDan McDonald# respectively), but anyhow it clears up some doubts too." 114656b82ca8SDan McDonald# 114756b82ca8SDan McDonald# Data for Pacific/Easter from 1910 through 1967 come from Shanks & 114856b82ca8SDan McDonald# Pottenger. After that, for lack of better info assume 114956b82ca8SDan McDonald# Pacific/Easter is always two hours behind America/Santiago; 115056b82ca8SDan McDonald# this is known to work for DST transitions starting in 2008 and 115156b82ca8SDan McDonald# may well be true for earlier transitions. 115256b82ca8SDan McDonald 1153427b4c5cSAndy Fiddaman# From Tim Parenti (2022-07-06): 11542de2fd87SAndy Fiddaman# For a brief period of roughly six weeks in 1946, DST was only observed on an 11552de2fd87SAndy Fiddaman# emergency basis in specific regions of central Chile; namely, "the national 11562de2fd87SAndy Fiddaman# territory between the provinces of Coquimbo and Concepción, inclusive". 11572de2fd87SAndy Fiddaman# This was enacted by Decree 3,891, dated 1946-07-13, and took effect 11582de2fd87SAndy Fiddaman# 1946-07-14 24:00, advancing these central regions to -03. 11592de2fd87SAndy Fiddaman# https://www.diariooficial.interior.gob.cl/versiones-anteriores/do-h/19460715/#page/1 11602de2fd87SAndy Fiddaman# The decree contemplated "[t]hat this advancement of the Official Time, even 11612de2fd87SAndy Fiddaman# though it has been proposed for the cities of Santiago and Valparaíso only, 11622de2fd87SAndy Fiddaman# must be agreed with that of other cities, due to the connection of various 11632de2fd87SAndy Fiddaman# activities that require it, such as, for example, the operation of rail 11642de2fd87SAndy Fiddaman# services". It was originally set to expire after 30 days but was extended 11652de2fd87SAndy Fiddaman# through 1946-08-31 by Decree 4,506, dated 1946-08-13. 11662de2fd87SAndy Fiddaman# https://www.diariooficial.interior.gob.cl/versiones-anteriores/do-h/19460814/#page/1 11672de2fd87SAndy Fiddaman# 11682de2fd87SAndy Fiddaman# Law Number 8,522, promulgated 1946-08-27, reunified Chilean clocks at their 11692de2fd87SAndy Fiddaman# new "Summer Time" of -04, reckoned as that of "the meridian of the 11702de2fd87SAndy Fiddaman# Astronomical Observatory of Lo Espejo, advanced by 42 minutes and 45 1171427b4c5cSAndy Fiddaman# seconds". Although this law specified the new Summer Time to start on 1 1172427b4c5cSAndy Fiddaman# September each year, a special "transitional article" started it a few days 1173427b4c5cSAndy Fiddaman# early, as soon as the law took effect. As the law was to take force "from 1174427b4c5cSAndy Fiddaman# the date of its publication in the 'Diario Oficial', which happened the 1175427b4c5cSAndy Fiddaman# following day, presume the change took place in Santiago and its environs 1176427b4c5cSAndy Fiddaman# from 24:00 -03 to 23:00 -04 on Wednesday 1946-08-28. Although this was a 1177427b4c5cSAndy Fiddaman# no-op for wall clocks in the north and south of the country, put their formal 1178427b4c5cSAndy Fiddaman# start to DST an hour later when they reached 24:00 -04. 11792de2fd87SAndy Fiddaman# https://www.diariooficial.interior.gob.cl/versiones-anteriores/do-h/19460828/#page/1 11802de2fd87SAndy Fiddaman# After a brief "Winter Time" stint at -05 beginning 1947-04-01, Law Number 11812de2fd87SAndy Fiddaman# 8,777, promulgated 1947-05-17, established year-round -04 "from 23:00 on the 11822de2fd87SAndy Fiddaman# second day after it is published in the 'Diario Oficial'." It was published 11832de2fd87SAndy Fiddaman# on Monday 1947-05-19 and so took effect from Wednesday 1947-05-21 23:00. 11842de2fd87SAndy Fiddaman# https://www.diariooficial.interior.gob.cl/versiones-anteriores/do-h/19470519/#page/1 11852de2fd87SAndy Fiddaman 11867c478bd9Sstevel@tonic-gate# From Eduardo Krell (1995-10-19): 11877c478bd9Sstevel@tonic-gate# The law says to switch to DST at midnight [24:00] on the second SATURDAY 11887c478bd9Sstevel@tonic-gate# of October.... The law is the same for March and October. 11897c478bd9Sstevel@tonic-gate# (1998-09-29): 11907c478bd9Sstevel@tonic-gate# Because of the drought this year, the government decided to go into 11917c478bd9Sstevel@tonic-gate# DST earlier (saturday 9/26 at 24:00). This is a one-time change only ... 11927c478bd9Sstevel@tonic-gate# (unless there's another dry season next year, I guess). 11937c478bd9Sstevel@tonic-gate 11947c478bd9Sstevel@tonic-gate# From Julio I. Pacheco Troncoso (1999-03-18): 11957c478bd9Sstevel@tonic-gate# Because of the same drought, the government decided to end DST later, 11967c478bd9Sstevel@tonic-gate# on April 3, (one-time change). 11977c478bd9Sstevel@tonic-gate 11986f8e8937SDan McDonald# From Germán Poo-Caamaño (2008-03-03): 11998593320bSrobbin# Due to drought, Chile extends Daylight Time in three weeks. This 12008593320bSrobbin# is one-time change (Saturday 3/29 at 24:00 for America/Santiago 12018593320bSrobbin# and Saturday 3/29 at 22:00 for Pacific/Easter) 1202a43ba736SRobert Mustacchi# The Supreme Decree is located at 12038593320bSrobbin# http://www.shoa.cl/servicios/supremo316.pdf 120456b82ca8SDan McDonald# 12056f8e8937SDan McDonald# From José Miguel Garrido (2008-03-05): 12068593320bSrobbin# http://www.shoa.cl/noticias/2008/04hora/hora.htm 12078593320bSrobbin 1208d8ff9d22SNobutomo Nakano# From Angel Chiang (2010-03-04): 1209d8ff9d22SNobutomo Nakano# Subject: DST in Chile exceptionally extended to 3 April due to earthquake 1210d8ff9d22SNobutomo Nakano# http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098 1211d8ff9d22SNobutomo Nakano# 12126f8e8937SDan McDonald# From Arthur David Olson (2010-03-06): 1213d8ff9d22SNobutomo Nakano# Angel Chiang's message confirmed by Julio Pacheco; Julio provided a patch. 1214d8ff9d22SNobutomo Nakano 1215abaa65c8SYuri Pankov# From Glenn Eychaner (2011-03-28): 1216abaa65c8SYuri Pankov# http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E} 1217abaa65c8SYuri Pankov# In English: 1218abaa65c8SYuri Pankov# Chile's clocks will go back an hour this year on the 7th of May instead 1219abaa65c8SYuri Pankov# of this Saturday. They will go forward again the 3rd Saturday in 122056b82ca8SDan McDonald# August, not in October as they have since 1968. 1221abaa65c8SYuri Pankov 1222a43ba736SRobert Mustacchi# From Mauricio Parada (2012-02-22), translated by Glenn Eychaner (2012-02-23): 1223a43ba736SRobert Mustacchi# As stated in the website of the Chilean Energy Ministry 1224a43ba736SRobert Mustacchi# http://www.minenergia.cl/ministerio/noticias/generales/gobierno-anuncia-fechas-de-cambio-de.html 1225a43ba736SRobert Mustacchi# The Chilean Government has decided to postpone the entrance into winter time 122656b82ca8SDan McDonald# (to leave DST) from March 11 2012 to April 28th 2012.... 1227a43ba736SRobert Mustacchi# Quote from the website communication: 1228a43ba736SRobert Mustacchi# 1229a43ba736SRobert Mustacchi# 6. For the year 2012, the dates of entry into winter time will be as follows: 1230a43ba736SRobert Mustacchi# a. Saturday April 28, 2012, clocks should go back 60 minutes; that is, at 1231a43ba736SRobert Mustacchi# 23:59:59, instead of passing to 0:00, the time should be adjusted to be 23:00 1232a43ba736SRobert Mustacchi# of the same day. 1233a43ba736SRobert Mustacchi# b. Saturday, September 1, 2012, clocks should go forward 60 minutes; that is, 1234a43ba736SRobert Mustacchi# at 23:59:59, instead of passing to 0:00, the time should be adjusted to be 1235a43ba736SRobert Mustacchi# 01:00 on September 2. 1236a43ba736SRobert Mustacchi 1237a43ba736SRobert Mustacchi# From Steffen Thorsen (2013-02-15): 1238a43ba736SRobert Mustacchi# According to several news sources, Chile has extended DST this year, 1239a43ba736SRobert Mustacchi# they will end DST later and start DST earlier than planned. They 1240a43ba736SRobert Mustacchi# hope to save energy. The new end date is 2013-04-28 00:00 and new 1241a43ba736SRobert Mustacchi# start date is 2013-09-08 00:00.... 1242a43ba736SRobert Mustacchi# http://www.gob.cl/informa/2013/02/15/gobierno-anuncia-fechas-de-cambio-de-hora-para-el-ano-2013.htm 1243a43ba736SRobert Mustacchi 12446f8e8937SDan McDonald# From José Miguel Garrido (2014-02-19): 12456f8e8937SDan McDonald# Today appeared in the Diario Oficial a decree amending the time change 12466f8e8937SDan McDonald# dates to 2014. 12476f8e8937SDan McDonald# DST End: last Saturday of April 2014 (Sun 27 Apr 2014 03:00 UTC) 12486f8e8937SDan McDonald# DST Start: first Saturday of September 2014 (Sun 07 Sep 2014 04:00 UTC) 12496f8e8937SDan McDonald# http://www.diariooficial.interior.gob.cl//media/2014/02/19/do-20140219.pdf 12506f8e8937SDan McDonald 125156b82ca8SDan McDonald# From Eduardo Romero Urra (2015-03-03): 125256b82ca8SDan McDonald# Today has been published officially that Chile will use the DST time 125356b82ca8SDan McDonald# permanently until March 25 of 2017 125456b82ca8SDan McDonald# http://www.diariooficial.interior.gob.cl/media/2015/03/03/1-large.jpg 125556b82ca8SDan McDonald# 125656b82ca8SDan McDonald# From Paul Eggert (2015-03-03): 125756b82ca8SDan McDonald# For now, assume that the extension will persist indefinitely. 1258a43ba736SRobert Mustacchi 1259f63cc156SDan McDonald# From Juan Correa (2016-03-18): 1260f63cc156SDan McDonald# The decree regarding DST has been published in today's Official Gazette: 1261f63cc156SDan McDonald# http://www.diariooficial.interior.gob.cl/versiones-anteriores/do/20160318/ 1262f63cc156SDan McDonald# http://www.leychile.cl/Navegar?idNorma=1088502 1263f63cc156SDan McDonald# It does consider the second Saturday of May and August as the dates 1264f63cc156SDan McDonald# for the transition; and it lists DST dates until 2019, but I think 1265f63cc156SDan McDonald# this scheme will stick. 1266f63cc156SDan McDonald# 1267f63cc156SDan McDonald# From Paul Eggert (2016-03-18): 1268f63cc156SDan McDonald# For now, assume the pattern holds for the indefinite future. 1269f63cc156SDan McDonald# The decree says transitions occur at 24:00; in practice this appears 1270f63cc156SDan McDonald# to mean 24:00 mainland time, not 24:00 local time, so that Easter 1271f63cc156SDan McDonald# Island is always two hours behind the mainland. 1272f63cc156SDan McDonald 1273dafc4501SDan McDonald# From Juan Correa (2016-12-04): 1274dafc4501SDan McDonald# Magallanes region ... will keep DST (UTC -3) all year round.... 1275dafc4501SDan McDonald# http://www.soychile.cl/Santiago/Sociedad/2016/12/04/433428/Bachelet-firmo-el-decreto-para-establecer-un-horario-unico-para-la-Region-de-Magallanes.aspx 1276dafc4501SDan McDonald# From Deborah Goldsmith (2017-01-19): 1277dafc4501SDan McDonald# http://www.diariooficial.interior.gob.cl/publicaciones/2017/01/17/41660/01/1169626.pdf 1278dafc4501SDan McDonald 127905e627dcSAndy Fiddaman# From Juan Correa (2018-08-13): 128005e627dcSAndy Fiddaman# As of moments ago, the Ministry of Energy in Chile has announced the new 128105e627dcSAndy Fiddaman# schema for DST. ... Announcement in video (in Spanish): 128205e627dcSAndy Fiddaman# https://twitter.com/MinEnergia/status/1029000399129374720 128305e627dcSAndy Fiddaman# From Yonathan Dossow (2018-08-13): 128405e627dcSAndy Fiddaman# The video says "first Saturday of September", we all know it means Sunday at 128505e627dcSAndy Fiddaman# midnight. 128605e627dcSAndy Fiddaman# From Tim Parenti (2018-08-13): 128705e627dcSAndy Fiddaman# Translating the captions on the video at 0:44-0:55, "We want to announce as 128805e627dcSAndy Fiddaman# Government that from 2019, Winter Time will be increased to 5 months, between 128905e627dcSAndy Fiddaman# the first Saturday of April and the first Saturday of September." 129005e627dcSAndy Fiddaman# At 2:08-2:20, "The Magallanes region will maintain its current time, as 129105e627dcSAndy Fiddaman# decided by the citizens during 2017, but our Government will promote a 129205e627dcSAndy Fiddaman# regional dialogue table to gather their opinion on this matter." 129305e627dcSAndy Fiddaman# https://twitter.com/MinEnergia/status/1029009354001973248 129405e627dcSAndy Fiddaman# "We will keep the new time policy unchanged for at least the next 4 years." 129505e627dcSAndy Fiddaman# So we extend the new rules on Saturdays at 24:00 mainland time indefinitely. 1296374df668SAndy Fiddaman# From Juan Correa (2019-02-04): 1297374df668SAndy Fiddaman# http://www.diariooficial.interior.gob.cl/publicaciones/2018/11/23/42212/01/1498738.pdf 1298427b4c5cSAndy Fiddaman 1299427b4c5cSAndy Fiddaman# From Juan Correa (2022-04-02): 1300427b4c5cSAndy Fiddaman# I found there was a decree published last Thursday that will keep 1301427b4c5cSAndy Fiddaman# Magallanes region to UTC -3 "indefinitely". The decree is available at 1302427b4c5cSAndy Fiddaman# https://www.diariooficial.interior.gob.cl/publicaciones/2022/03/31/43217-B/01/2108910.pdf 1303427b4c5cSAndy Fiddaman 1304427b4c5cSAndy Fiddaman# From Juan Correa (2022-08-09): 1305427b4c5cSAndy Fiddaman# the Internal Affairs Ministry (Ministerio del Interior) informed DST 1306427b4c5cSAndy Fiddaman# for America/Santiago will start on midnight of September 11th; 1307427b4c5cSAndy Fiddaman# and will end on April 1st, 2023. Magallanes region (America/Punta_Arenas) 1308427b4c5cSAndy Fiddaman# will keep UTC -3 "indefinitely"... This is because on September 4th 1309fff4a956SAndy Fiddaman# we will have a voting whether to approve a new Constitution. 1310fff4a956SAndy Fiddaman# 1311fff4a956SAndy Fiddaman# From Eduardo Romero Urra (2022-08-17): 1312fff4a956SAndy Fiddaman# https://www.diariooficial.interior.gob.cl/publicaciones/2022/08/13/43327/01/2172567.pdf 1313fff4a956SAndy Fiddaman# 1314fff4a956SAndy Fiddaman# From Paul Eggert (2022-08-17): 1315fff4a956SAndy Fiddaman# Although the presidential decree stops at fall 2026, assume that 1316fff4a956SAndy Fiddaman# similar DST rules will continue thereafter. 131705e627dcSAndy Fiddaman 1318f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 13193508b934SYuri PankovRule Chile 1927 1931 - Sep 1 0:00 1:00 - 13207c478bd9Sstevel@tonic-gateRule Chile 1928 1932 - Apr 1 0:00 0 - 13213508b934SYuri PankovRule Chile 1968 only - Nov 3 4:00u 1:00 - 1322150c1068SrobbinRule Chile 1969 only - Mar 30 3:00u 0 - 13233508b934SYuri PankovRule Chile 1969 only - Nov 23 4:00u 1:00 - 1324150c1068SrobbinRule Chile 1970 only - Mar 29 3:00u 0 - 1325150c1068SrobbinRule Chile 1971 only - Mar 14 3:00u 0 - 13263508b934SYuri PankovRule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 - 1327150c1068SrobbinRule Chile 1972 1986 - Mar Sun>=9 3:00u 0 - 13283508b934SYuri PankovRule Chile 1973 only - Sep 30 4:00u 1:00 - 13293508b934SYuri PankovRule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 - 1330150c1068SrobbinRule Chile 1987 only - Apr 12 3:00u 0 - 133156b82ca8SDan McDonaldRule Chile 1988 1990 - Mar Sun>=9 3:00u 0 - 13323508b934SYuri PankovRule Chile 1988 1989 - Oct Sun>=9 4:00u 1:00 - 13333508b934SYuri PankovRule Chile 1990 only - Sep 16 4:00u 1:00 - 1334150c1068SrobbinRule Chile 1991 1996 - Mar Sun>=9 3:00u 0 - 13353508b934SYuri PankovRule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 - 1336150c1068SrobbinRule Chile 1997 only - Mar 30 3:00u 0 - 1337150c1068SrobbinRule Chile 1998 only - Mar Sun>=9 3:00u 0 - 13383508b934SYuri PankovRule Chile 1998 only - Sep 27 4:00u 1:00 - 13397c478bd9Sstevel@tonic-gateRule Chile 1999 only - Apr 4 3:00u 0 - 13403508b934SYuri PankovRule Chile 1999 2010 - Oct Sun>=9 4:00u 1:00 - 13418593320bSrobbinRule Chile 2000 2007 - Mar Sun>=9 3:00u 0 - 13428593320bSrobbin# N.B.: the end of March 29 in Chile is March 30 in Universal time, 13438593320bSrobbin# which is used below in specifying the transition. 13448593320bSrobbinRule Chile 2008 only - Mar 30 3:00u 0 - 1345d8ff9d22SNobutomo NakanoRule Chile 2009 only - Mar Sun>=9 3:00u 0 - 1346abaa65c8SYuri PankovRule Chile 2010 only - Apr Sun>=1 3:00u 0 - 1347abaa65c8SYuri PankovRule Chile 2011 only - May Sun>=2 3:00u 0 - 13483508b934SYuri PankovRule Chile 2011 only - Aug Sun>=16 4:00u 1:00 - 1349f63cc156SDan McDonaldRule Chile 2012 2014 - Apr Sun>=23 3:00u 0 - 13503508b934SYuri PankovRule Chile 2012 2014 - Sep Sun>=2 4:00u 1:00 - 135105e627dcSAndy FiddamanRule Chile 2016 2018 - May Sun>=9 3:00u 0 - 135205e627dcSAndy FiddamanRule Chile 2016 2018 - Aug Sun>=9 4:00u 1:00 - 135305e627dcSAndy FiddamanRule Chile 2019 max - Apr Sun>=2 3:00u 0 - 1354427b4c5cSAndy FiddamanRule Chile 2019 2021 - Sep Sun>=2 4:00u 1:00 - 1355427b4c5cSAndy FiddamanRule Chile 2022 only - Sep Sun>=9 4:00u 1:00 - 1356427b4c5cSAndy FiddamanRule Chile 2023 max - Sep Sun>=2 4:00u 1:00 - 1357150c1068Srobbin# IATA SSIM anomalies: (1992-02) says 1992-03-14; 13587c478bd9Sstevel@tonic-gate# (1996-09) says 1998-03-08. Ignore these. 1359374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 13602de2fd87SAndy FiddamanZone America/Santiago -4:42:45 - LMT 1890 13612de2fd87SAndy Fiddaman -4:42:45 - SMT 1910 Jan 10 # Santiago Mean Time 1362dafc4501SDan McDonald -5:00 - -05 1916 Jul 1 13632de2fd87SAndy Fiddaman -4:42:45 - SMT 1918 Sep 10 1364dafc4501SDan McDonald -4:00 - -04 1919 Jul 1 13652de2fd87SAndy Fiddaman -4:42:45 - SMT 1927 Sep 1 1366dafc4501SDan McDonald -5:00 Chile -05/-04 1932 Sep 1 1367dafc4501SDan McDonald -4:00 - -04 1942 Jun 1 1368dafc4501SDan McDonald -5:00 - -05 1942 Aug 1 1369427b4c5cSAndy Fiddaman -4:00 - -04 1946 Jul 14 24:00 1370427b4c5cSAndy Fiddaman -4:00 1:00 -03 1946 Aug 28 24:00 # central CL 1371427b4c5cSAndy Fiddaman -5:00 1:00 -04 1947 Mar 31 24:00 1372dafc4501SDan McDonald -5:00 - -05 1947 May 21 23:00 1373dafc4501SDan McDonald -4:00 Chile -04/-03 1374dafc4501SDan McDonaldZone America/Punta_Arenas -4:43:40 - LMT 1890 13752de2fd87SAndy Fiddaman -4:42:45 - SMT 1910 Jan 10 1376dafc4501SDan McDonald -5:00 - -05 1916 Jul 1 13772de2fd87SAndy Fiddaman -4:42:45 - SMT 1918 Sep 10 1378dafc4501SDan McDonald -4:00 - -04 1919 Jul 1 13792de2fd87SAndy Fiddaman -4:42:45 - SMT 1927 Sep 1 1380dafc4501SDan McDonald -5:00 Chile -05/-04 1932 Sep 1 1381dafc4501SDan McDonald -4:00 - -04 1942 Jun 1 1382dafc4501SDan McDonald -5:00 - -05 1942 Aug 1 1383427b4c5cSAndy Fiddaman -4:00 - -04 1946 Aug 28 24:00 1384427b4c5cSAndy Fiddaman -5:00 1:00 -04 1947 Mar 31 24:00 1385dafc4501SDan McDonald -5:00 - -05 1947 May 21 23:00 1386dafc4501SDan McDonald -4:00 Chile -04/-03 2016 Dec 4 1387dafc4501SDan McDonald -3:00 - -03 138856b82ca8SDan McDonaldZone Pacific/Easter -7:17:28 - LMT 1890 1389a68d064cSrobbin -7:17:28 - EMT 1932 Sep # Easter Mean Time 1390dafc4501SDan McDonald -7:00 Chile -07/-06 1982 Mar 14 3:00u # Easter Time 1391dafc4501SDan McDonald -6:00 Chile -06/-05 13927c478bd9Sstevel@tonic-gate# 13936f8e8937SDan McDonald# Salas y Gómez Island is uninhabited. 13946f8e8937SDan McDonald# Other Chilean locations, including Juan Fernández Is, Desventuradas Is, 13956f8e8937SDan McDonald# and Antarctic bases, are like America/Santiago. 13967c478bd9Sstevel@tonic-gate 139756b82ca8SDan McDonald# Antarctic base using South American rules 139856b82ca8SDan McDonald# (See the file 'antarctica' for more.) 139956b82ca8SDan McDonald# 140056b82ca8SDan McDonald# Palmer, Anvers Island, since 1965 (moved 2 miles in 1968) 140156b82ca8SDan McDonald# 140256b82ca8SDan McDonald# From Ethan Dicks (1996-10-06): 140356b82ca8SDan McDonald# It keeps the same time as Punta Arenas, Chile, because, just like us 140456b82ca8SDan McDonald# and the South Pole, that's the other end of their supply line.... 140556b82ca8SDan McDonald# I verified with someone who was there that since 1980, 140656b82ca8SDan McDonald# Palmer has followed Chile. Prior to that, before the Falklands War, 140756b82ca8SDan McDonald# Palmer used to be supplied from Argentina. 140856b82ca8SDan McDonald# 1409374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 1410c2d5ab87SDan McDonaldZone Antarctica/Palmer 0 - -00 1965 1411dafc4501SDan McDonald -4:00 Arg -04/-03 1969 Oct 5 1412dafc4501SDan McDonald -3:00 Arg -03/-02 1982 May 1413dafc4501SDan McDonald -4:00 Chile -04/-03 2016 Dec 4 1414dafc4501SDan McDonald -3:00 - -03 141556b82ca8SDan McDonald 14167c478bd9Sstevel@tonic-gate# Colombia 1417a43ba736SRobert Mustacchi 1418427b4c5cSAndy Fiddaman# Milne gives 4:56:16.4 for Bogotá time in 1899. He writes, 1419a43ba736SRobert Mustacchi# "A variation of fifteen minutes in the public clocks of Bogota is not rare." 1420a43ba736SRobert Mustacchi 1421af2e290bSAndy Fiddaman# From Alois Treindl (2022-11-10): 1422af2e290bSAndy Fiddaman# End of time change in Colombia 1993 ... should be 6 February 24h ... 1423af2e290bSAndy Fiddaman# DECRETO 267 DE 1993 1424af2e290bSAndy Fiddaman# https://www.suin-juriscol.gov.co/viewDocument.asp?ruta=Decretos/1061335 1425af2e290bSAndy Fiddaman 1426f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 1427af2e290bSAndy FiddamanRule CO 1992 only - May 3 0:00 1:00 - 1428af2e290bSAndy FiddamanRule CO 1993 only - Feb 6 24:00 0 - 1429374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 1430427b4c5cSAndy Fiddaman #STDOFF -4:56:16.4 1431a43ba736SRobert MustacchiZone America/Bogota -4:56:16 - LMT 1884 Mar 13 14326f8e8937SDan McDonald -4:56:16 - BMT 1914 Nov 23 # Bogotá Mean Time 1433dafc4501SDan McDonald -5:00 CO -05/-04 14347c478bd9Sstevel@tonic-gate# Malpelo, Providencia, San Andres 14357c478bd9Sstevel@tonic-gate# no information; probably like America/Bogota 14367c478bd9Sstevel@tonic-gate 1437abaa65c8SYuri Pankov 14387c478bd9Sstevel@tonic-gate# Ecuador 1439a68d064cSrobbin# 14406f8e8937SDan McDonald# Milne says the Central and South American Telegraph Company used -5:24:15. 1441a43ba736SRobert Mustacchi# 1442dafc4501SDan McDonald# From Alois Treindl (2016-12-15): 1443b654b02dSYuri Pankov# https://www.elcomercio.com/actualidad/hora-sixto-1993.html 1444dafc4501SDan McDonald# ... Whether the law applied also to Galápagos, I do not know. 1445dafc4501SDan McDonald# From Paul Eggert (2016-12-15): 1446b654b02dSYuri Pankov# https://www.elcomercio.com/afull/modificacion-husohorario-ecuador-presidentes-decreto.html 1447dafc4501SDan McDonald# This says President Sixto Durán Ballén signed decree No. 285, which 1448dafc4501SDan McDonald# established DST from 1992-11-28 to 1993-02-05; it does not give transition 1449dafc4501SDan McDonald# times. The people called it "hora de Sixto" ("Sixto hour"). The change did 1450dafc4501SDan McDonald# not go over well; a popular song "Qué hora es" by Jaime Guevara had lyrics 1451dafc4501SDan McDonald# that included "Amanecía en mitad de la noche, los guaguas iban a clase sin 1452dafc4501SDan McDonald# sol" ("It was dawning in the middle of the night, the buses went to class 1453dafc4501SDan McDonald# without sun"). Although Ballén's campaign slogan was "Ni un paso atrás" 1454dafc4501SDan McDonald# (Not one step back), the clocks went back in 1993 and the experiment was not 1455dafc4501SDan McDonald# repeated. For now, assume transitions were at 00:00 local time country-wide. 1456dafc4501SDan McDonald# 1457f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 14583508b934SYuri PankovRule Ecuador 1992 only - Nov 28 0:00 1:00 - 1459dafc4501SDan McDonaldRule Ecuador 1993 only - Feb 5 0:00 0 - 1460a68d064cSrobbin# 1461374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 14627c478bd9Sstevel@tonic-gateZone America/Guayaquil -5:19:20 - LMT 1890 14637c478bd9Sstevel@tonic-gate -5:14:00 - QMT 1931 # Quito Mean Time 1464dafc4501SDan McDonald -5:00 Ecuador -05/-04 14657c478bd9Sstevel@tonic-gateZone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno 1466dafc4501SDan McDonald -5:00 - -05 1986 1467dafc4501SDan McDonald -6:00 Ecuador -06/-05 14687c478bd9Sstevel@tonic-gate 14697c478bd9Sstevel@tonic-gate# Falklands 14707c478bd9Sstevel@tonic-gate 14712f9aa4a7Srobbin# From Paul Eggert (2006-03-22): 14722f9aa4a7Srobbin# Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except 14732f9aa4a7Srobbin# the IATA gives 1996-09-08. Go with Shanks & Pottenger. 14747c478bd9Sstevel@tonic-gate 14757c478bd9Sstevel@tonic-gate# From Falkland Islands Government Office, London (2001-01-22) 14766f8e8937SDan McDonald# via Jesper Nørgaard: 14777c478bd9Sstevel@tonic-gate# ... the clocks revert back to Local Mean Time at 2 am on Sunday 15 14787c478bd9Sstevel@tonic-gate# April 2001 and advance one hour to summer time at 2 am on Sunday 2 14797c478bd9Sstevel@tonic-gate# September. It is anticipated that the clocks will revert back at 2 14807c478bd9Sstevel@tonic-gate# am on Sunday 21 April 2002 and advance to summer time at 2 am on 14817c478bd9Sstevel@tonic-gate# Sunday 1 September. 14827c478bd9Sstevel@tonic-gate 14837c478bd9Sstevel@tonic-gate# From Rives McDow (2001-02-13): 14847c478bd9Sstevel@tonic-gate# 14857c478bd9Sstevel@tonic-gate# I have communicated several times with people there, and the last 14867c478bd9Sstevel@tonic-gate# time I had communications that was helpful was in 1998. Here is 14877c478bd9Sstevel@tonic-gate# what was said then: 14887c478bd9Sstevel@tonic-gate# 14897c478bd9Sstevel@tonic-gate# "The general rule was that Stanley used daylight saving and the Camp 14907c478bd9Sstevel@tonic-gate# did not. However for various reasons many people in the Camp have 14917c478bd9Sstevel@tonic-gate# started to use daylight saving (known locally as 'Stanley Time') 14927c478bd9Sstevel@tonic-gate# There is no rule as to who uses daylight saving - it is a matter of 14937c478bd9Sstevel@tonic-gate# personal choice and so it is impossible to draw a map showing who 14947c478bd9Sstevel@tonic-gate# uses it and who does not. Any list would be out of date as soon as 14957c478bd9Sstevel@tonic-gate# it was produced. This year daylight saving ended on April 18/19th 14967c478bd9Sstevel@tonic-gate# and started again on September 12/13th. I do not know what the rule 14977c478bd9Sstevel@tonic-gate# is, but can find out if you like. We do not change at the same time 14987c478bd9Sstevel@tonic-gate# as UK or Chile." 14997c478bd9Sstevel@tonic-gate# 15007c478bd9Sstevel@tonic-gate# I did have in my notes that the rule was "Second Saturday in Sep at 15017c478bd9Sstevel@tonic-gate# 0:00 until third Saturday in Apr at 0:00". I think that this does 15027c478bd9Sstevel@tonic-gate# not agree in some cases with Shanks; is this true? 15037c478bd9Sstevel@tonic-gate# 15047c478bd9Sstevel@tonic-gate# Also, there is no mention in the list that some areas in the 15057c478bd9Sstevel@tonic-gate# Falklands do not use DST. I have found in my communications there 15067c478bd9Sstevel@tonic-gate# that these areas are on the western half of East Falkland and all of 15077c478bd9Sstevel@tonic-gate# West Falkland. Stanley is the only place that consistently observes 15087c478bd9Sstevel@tonic-gate# DST. Again, as in other places in the world, the farmers don't like 15097c478bd9Sstevel@tonic-gate# it. West Falkland is almost entirely sheep farmers. 15107c478bd9Sstevel@tonic-gate# 15117c478bd9Sstevel@tonic-gate# I know one lady there that keeps a list of which farm keeps DST and 15127c478bd9Sstevel@tonic-gate# which doesn't each year. She runs a shop in Stanley, and says that 15137c478bd9Sstevel@tonic-gate# the list changes each year. She uses it to communicate to her 15147c478bd9Sstevel@tonic-gate# customers, catching them when they are home for lunch or dinner. 15157c478bd9Sstevel@tonic-gate 15167c478bd9Sstevel@tonic-gate# From Paul Eggert (2001-03-05): 15177c478bd9Sstevel@tonic-gate# For now, we'll just record the time in Stanley, since we have no 15187c478bd9Sstevel@tonic-gate# better info. 15197c478bd9Sstevel@tonic-gate 1520abaa65c8SYuri Pankov# From Steffen Thorsen (2011-04-01): 1521abaa65c8SYuri Pankov# The Falkland Islands will not turn back clocks this winter, but stay on 1522abaa65c8SYuri Pankov# daylight saving time. 1523abaa65c8SYuri Pankov# 1524abaa65c8SYuri Pankov# One source: 1525abaa65c8SYuri Pankov# http://www.falklandnews.com/public/story.cfm?get=5914&source=3 1526abaa65c8SYuri Pankov# 1527abaa65c8SYuri Pankov# We have gotten this confirmed by a clerk of the legislative assembly: 1528abaa65c8SYuri Pankov# Normally the clocks revert to Local Mean Time (UTC/GMT -4 hours) on the 1529abaa65c8SYuri Pankov# third Sunday of April at 0200hrs and advance to Summer Time (UTC/GMT -3 1530abaa65c8SYuri Pankov# hours) on the first Sunday of September at 0200hrs. 1531abaa65c8SYuri Pankov# 1532abaa65c8SYuri Pankov# IMPORTANT NOTE: During 2011, on a trial basis, the Falkland Islands 1533abaa65c8SYuri Pankov# will not revert to local mean time, but clocks will remain on Summer 1534abaa65c8SYuri Pankov# time (UTC/GMT - 3 hours) throughout the whole of 2011. Any long term 1535abaa65c8SYuri Pankov# change to local time following the trial period will be notified. 1536a43ba736SRobert Mustacchi# 1537a43ba736SRobert Mustacchi# From Andrew Newman (2012-02-24) 1538a43ba736SRobert Mustacchi# A letter from Justin McPhee, Chief Executive, 1539a43ba736SRobert Mustacchi# Cable & Wireless Falkland Islands (dated 2012-02-22) 1540a43ba736SRobert Mustacchi# states... 1541a43ba736SRobert Mustacchi# The current Atlantic/Stanley entry under South America expects the 1542a43ba736SRobert Mustacchi# clocks to go back to standard Falklands Time (FKT) on the 15th April. 1543a43ba736SRobert Mustacchi# The database entry states that in 2011 Stanley was staying on fixed 1544a43ba736SRobert Mustacchi# summer time on a trial basis only. FIG need to contact IANA and/or 1545a43ba736SRobert Mustacchi# the maintainers of the database to inform them we're adopting 1546a43ba736SRobert Mustacchi# the same policy this year and suggest recommendations for future years. 1547a43ba736SRobert Mustacchi# 15483508b934SYuri Pankov# For now we will assume permanent -03 for the Falklands 1549a43ba736SRobert Mustacchi# until advised differently (to apply for 2012 and beyond, after the 2011 1550a43ba736SRobert Mustacchi# experiment was apparently successful.) 1551f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 15523508b934SYuri PankovRule Falk 1937 1938 - Sep lastSun 0:00 1:00 - 15537c478bd9Sstevel@tonic-gateRule Falk 1938 1942 - Mar Sun>=19 0:00 0 - 15543508b934SYuri PankovRule Falk 1939 only - Oct 1 0:00 1:00 - 15553508b934SYuri PankovRule Falk 1940 1942 - Sep lastSun 0:00 1:00 - 15567c478bd9Sstevel@tonic-gateRule Falk 1943 only - Jan 1 0:00 0 - 15573508b934SYuri PankovRule Falk 1983 only - Sep lastSun 0:00 1:00 - 15587c478bd9Sstevel@tonic-gateRule Falk 1984 1985 - Apr lastSun 0:00 0 - 15593508b934SYuri PankovRule Falk 1984 only - Sep 16 0:00 1:00 - 15603508b934SYuri PankovRule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 - 15617c478bd9Sstevel@tonic-gateRule Falk 1986 2000 - Apr Sun>=16 0:00 0 - 1562abaa65c8SYuri PankovRule Falk 2001 2010 - Apr Sun>=15 2:00 0 - 15633508b934SYuri PankovRule Falk 2001 2010 - Sep Sun>=1 2:00 1:00 - 1564374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 15657c478bd9Sstevel@tonic-gateZone Atlantic/Stanley -3:51:24 - LMT 1890 15666f8e8937SDan McDonald -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time 1567dafc4501SDan McDonald -4:00 Falk -04/-03 1983 May 1568dafc4501SDan McDonald -3:00 Falk -03/-02 1985 Sep 15 1569dafc4501SDan McDonald -4:00 Falk -04/-03 2010 Sep 5 2:00 1570dafc4501SDan McDonald -3:00 - -03 15717c478bd9Sstevel@tonic-gate 15727c478bd9Sstevel@tonic-gate# French Guiana 1573*e15592c8SRobert Mustacchi# For the 1911/1912 establishment of standard time in French possessions, see: 1574*e15592c8SRobert Mustacchi# Société Française de Physique, Recueil de constantes physiques (1913), 1575*e15592c8SRobert Mustacchi# page 752, 18b. 1576374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 1577*e15592c8SRobert MustacchiZone America/Cayenne -3:29:20 - LMT 1911 Jul 1 1578dafc4501SDan McDonald -4:00 - -04 1967 Oct 1579dafc4501SDan McDonald -3:00 - -03 15807c478bd9Sstevel@tonic-gate 15817c478bd9Sstevel@tonic-gate# Guyana 158206965442SAndy Fiddaman 158306965442SAndy Fiddaman# From P Chan (2020-11-27): 158406965442SAndy Fiddaman# https://books.google.com/books?id=5-5CAQAAMAAJ&pg=SA1-PA547 158506965442SAndy Fiddaman# The Official Gazette of British Guiana. (New Series.) Vol. XL. July to 158606965442SAndy Fiddaman# December, 1915, p 1547, lists as several notes: 158706965442SAndy Fiddaman# "Local Mean Time 3 hours 52 mins. 39 secs. slow of Greenwich Mean Time 158806965442SAndy Fiddaman# (Georgetown.) From 1st August, 1911, British Guiana Standard Mean Time 4 158906965442SAndy Fiddaman# hours slow of Greenwich Mean Time, by notice in Official Gazette on 1st July, 159006965442SAndy Fiddaman# 1911. From 1st March, 1915, British Guiana Standard Mean Time 3 hours 45 159106965442SAndy Fiddaman# mins. 0 secs. slow of Greenwich Mean Time, by notice in Official Gazette on 159206965442SAndy Fiddaman# 23rd January, 1915." 159306965442SAndy Fiddaman# 159406965442SAndy Fiddaman# https://parliament.gov.gy/documents/acts/10923-act_no._27_of_1975_-_interpretation_and_general_clauses_(amendment)_act_1975.pdf 159506965442SAndy Fiddaman# Interpretation and general clauses (Amendment) Act 1975 (Act No. 27 of 1975) 159606965442SAndy Fiddaman# [dated 1975-07-31] 159706965442SAndy Fiddaman# "This Act...shall come into operation on 1st August, 1975." 159806965442SAndy Fiddaman# "...where any expression of time occurs...the time referred to shall signify 159906965442SAndy Fiddaman# the standard time of Guyana which shall be three hours behind Greenwich Mean 160006965442SAndy Fiddaman# Time." 160106965442SAndy Fiddaman# 160206965442SAndy Fiddaman# Circular No. 10/1992 dated 1992-03-20 160306965442SAndy Fiddaman# https://dps.gov.gy/wp-content/uploads/2018/12/1992-03-20-Circular-010.pdf 160406965442SAndy Fiddaman# "...cabinet has decided that with effect from Sunday 29th March, 1992, Guyana 160506965442SAndy Fiddaman# Standard Time would be re-established at 01:00 hours by adjusting the hands 160606965442SAndy Fiddaman# of the clock back to 24:00 hours." 160706965442SAndy Fiddaman# Legislated in the Interpretation and general clauses (Amendment) Act 1992 160806965442SAndy Fiddaman# (Act No. 6 of 1992) [passed 1992-03-27, published 1992-04-18] 160906965442SAndy Fiddaman# https://parliament.gov.gy/documents/acts/5885-6_of_1992_interpretation_and_general_clauses_(amendment)_act_1992.pdf 161006965442SAndy Fiddaman 1611374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 161206965442SAndy FiddamanZone America/Guyana -3:52:39 - LMT 1911 Aug 1 # Georgetown 161306965442SAndy Fiddaman -4:00 - -04 1915 Mar 1 161406965442SAndy Fiddaman -3:45 - -0345 1975 Aug 1 161506965442SAndy Fiddaman -3:00 - -03 1992 Mar 29 1:00 1616dafc4501SDan McDonald -4:00 - -04 16177c478bd9Sstevel@tonic-gate 16187c478bd9Sstevel@tonic-gate# Paraguay 1619a43ba736SRobert Mustacchi# 16202f9aa4a7Srobbin# From Paul Eggert (2006-03-22): 16216f8e8937SDan McDonald# Shanks & Pottenger say that spring transitions are 01:00 -> 02:00, 16226f8e8937SDan McDonald# and autumn transitions are 00:00 -> 23:00. Go with pre-1999 16237c478bd9Sstevel@tonic-gate# editions of Shanks, and with the IATA, who say transitions occur at 00:00. 1624a43ba736SRobert Mustacchi# 1625a43ba736SRobert Mustacchi# From Waldemar Villamayor-Venialbo (2013-09-20): 1626a43ba736SRobert Mustacchi# No time of the day is established for the adjustment, so people normally 1627a43ba736SRobert Mustacchi# adjust their clocks at 0 hour of the given dates. 1628a43ba736SRobert Mustacchi# 1629f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 16303508b934SYuri PankovRule Para 1975 1988 - Oct 1 0:00 1:00 - 16317c478bd9Sstevel@tonic-gateRule Para 1975 1978 - Mar 1 0:00 0 - 16327c478bd9Sstevel@tonic-gateRule Para 1979 1991 - Apr 1 0:00 0 - 16333508b934SYuri PankovRule Para 1989 only - Oct 22 0:00 1:00 - 16343508b934SYuri PankovRule Para 1990 only - Oct 1 0:00 1:00 - 16353508b934SYuri PankovRule Para 1991 only - Oct 6 0:00 1:00 - 16367c478bd9Sstevel@tonic-gateRule Para 1992 only - Mar 1 0:00 0 - 16373508b934SYuri PankovRule Para 1992 only - Oct 5 0:00 1:00 - 16387c478bd9Sstevel@tonic-gateRule Para 1993 only - Mar 31 0:00 0 - 16393508b934SYuri PankovRule Para 1993 1995 - Oct 1 0:00 1:00 - 16407c478bd9Sstevel@tonic-gateRule Para 1994 1995 - Feb lastSun 0:00 0 - 16417c478bd9Sstevel@tonic-gateRule Para 1996 only - Mar 1 0:00 0 - 16427c478bd9Sstevel@tonic-gate# IATA SSIM (2000-02) says 1999-10-10; ignore this for now. 16437c478bd9Sstevel@tonic-gate# From Steffen Thorsen (2000-10-02): 16447c478bd9Sstevel@tonic-gate# I have three independent reports that Paraguay changed to DST this Sunday 16457c478bd9Sstevel@tonic-gate# (10-01). 16467c478bd9Sstevel@tonic-gate# 16477c478bd9Sstevel@tonic-gate# Translated by Gwillim Law (2001-02-27) from 16486f8e8937SDan McDonald# Noticias, a daily paper in Asunción, Paraguay (2000-10-01): 16496f8e8937SDan McDonald# http://www.diarionoticias.com.py/011000/nacional/naciona1.htm 16507c478bd9Sstevel@tonic-gate# Starting at 0:00 today, the clock will be set forward 60 minutes, in 16517c478bd9Sstevel@tonic-gate# fulfillment of Decree No. 7,273 of the Executive Power.... The time change 16527c478bd9Sstevel@tonic-gate# system has been operating for several years. Formerly there was a separate 16537c478bd9Sstevel@tonic-gate# decree each year; the new law has the same effect, but permanently. Every 16547c478bd9Sstevel@tonic-gate# year, the time will change on the first Sunday of October; likewise, the 16557c478bd9Sstevel@tonic-gate# clock will be set back on the first Sunday of March. 16567c478bd9Sstevel@tonic-gate# 16573508b934SYuri PankovRule Para 1996 2001 - Oct Sun>=1 0:00 1:00 - 16582f9aa4a7Srobbin# IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger. 16597c478bd9Sstevel@tonic-gateRule Para 1997 only - Feb lastSun 0:00 0 - 16602f9aa4a7Srobbin# Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but 16617c478bd9Sstevel@tonic-gate# (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27). 16627c478bd9Sstevel@tonic-gateRule Para 1998 2001 - Mar Sun>=1 0:00 0 - 16637c478bd9Sstevel@tonic-gate# From Rives McDow (2002-02-28): 166456b82ca8SDan McDonald# A decree was issued in Paraguay (No. 16350) on 2002-02-26 that changed the 16657c478bd9Sstevel@tonic-gate# dst method to be from the first Sunday in September to the first Sunday in 16667c478bd9Sstevel@tonic-gate# April. 166780868c53SrobbinRule Para 2002 2004 - Apr Sun>=1 0:00 0 - 16683508b934SYuri PankovRule Para 2002 2003 - Sep Sun>=1 0:00 1:00 - 166980868c53Srobbin# 16706f8e8937SDan McDonald# From Jesper Nørgaard Welen (2005-01-02): 167180868c53Srobbin# There are several sources that claim that Paraguay made 167280868c53Srobbin# a timezone rule change in autumn 2004. 167380868c53Srobbin# From Steffen Thorsen (2005-01-05): 1674150c1068Srobbin# Decree 1,867 (2004-03-05) 16756f8e8937SDan McDonald# From Carlos Raúl Perasso via Jesper Nørgaard Welen (2006-10-13) 16766f8e8937SDan McDonald# http://www.presidencia.gov.py/decretos/D1867.pdf 16773508b934SYuri PankovRule Para 2004 2009 - Oct Sun>=15 0:00 1:00 - 1678d8ff9d22SNobutomo NakanoRule Para 2005 2009 - Mar Sun>=8 0:00 0 - 16796f8e8937SDan McDonald# From Carlos Raúl Perasso (2010-02-18): 16806f8e8937SDan McDonald# By decree number 3958 issued yesterday 1681d8ff9d22SNobutomo Nakano# http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf 1682d8ff9d22SNobutomo Nakano# Paraguay changes its DST schedule, postponing the March rule to April and 1683d8ff9d22SNobutomo Nakano# modifying the October date. The decree reads: 1684d8ff9d22SNobutomo Nakano# ... 1685d8ff9d22SNobutomo Nakano# Art. 1. It is hereby established that from the second Sunday of the month of 1686d8ff9d22SNobutomo Nakano# April of this year (2010), the official time is to be set back 60 minutes, 1687d8ff9d22SNobutomo Nakano# and that on the first Sunday of the month of October, it is to be set 1688d8ff9d22SNobutomo Nakano# forward 60 minutes, in all the territory of the Paraguayan Republic. 1689d8ff9d22SNobutomo Nakano# ... 16903508b934SYuri PankovRule Para 2010 max - Oct Sun>=1 0:00 1:00 - 1691a43ba736SRobert MustacchiRule Para 2010 2012 - Apr Sun>=8 0:00 0 - 1692a43ba736SRobert Mustacchi# 1693a43ba736SRobert Mustacchi# From Steffen Thorsen (2013-03-07): 1694a43ba736SRobert Mustacchi# Paraguay will end DST on 2013-03-24 00:00.... 1695a43ba736SRobert Mustacchi# http://www.ande.gov.py/interna.php?id=1075 1696a43ba736SRobert Mustacchi# 16976f8e8937SDan McDonald# From Carlos Raúl Perasso (2013-03-15): 1698a43ba736SRobert Mustacchi# The change in Paraguay is now final. Decree number 10780 1699a43ba736SRobert Mustacchi# http://www.presidencia.gov.py/uploads/pdf/presidencia-3b86ff4b691c79d4f5927ca964922ec74772ce857c02ca054a52a37b49afc7fb.pdf 17006f8e8937SDan McDonald# From Carlos Raúl Perasso (2014-02-28): 17016f8e8937SDan McDonald# Decree 1264 can be found at: 17026f8e8937SDan McDonald# http://www.presidencia.gov.py/archivos/documentos/DECRETO1264_ey9r8zai.pdf 1703b4eb54e1SRobert Mustacchi# 1704b4eb54e1SRobert Mustacchi# From Paul Eggert (2023-07-26): 1705b4eb54e1SRobert Mustacchi# Transition dates are now set by Law No. 7115, not by presidential decree. 1706b4eb54e1SRobert Mustacchi# https://www.abc.com.py/politica/2023/07/12/promulgacion-el-cambio-de-hora-sera-por-ley/ 1707b4eb54e1SRobert Mustacchi# From Carlos Raúl Perasso (2023-07-27): 1708b4eb54e1SRobert Mustacchi# http://silpy.congreso.gov.py/descarga/ley-144138 1709a43ba736SRobert MustacchiRule Para 2013 max - Mar Sun>=22 0:00 0 - 17107c478bd9Sstevel@tonic-gate 1711374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 17127c478bd9Sstevel@tonic-gateZone America/Asuncion -3:50:40 - LMT 1890 17136f8e8937SDan McDonald -3:50:40 - AMT 1931 Oct 10 # Asunción Mean Time 1714dafc4501SDan McDonald -4:00 - -04 1972 Oct 1715dafc4501SDan McDonald -3:00 - -03 1974 Apr 1716dafc4501SDan McDonald -4:00 Para -04/-03 17177c478bd9Sstevel@tonic-gate 17187c478bd9Sstevel@tonic-gate# Peru 17197c478bd9Sstevel@tonic-gate# 17206f8e8937SDan McDonald# From Evelyn C. Leeper via Mark Brader (2003-10-26) 17216f8e8937SDan McDonald# <news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net>: 172280868c53Srobbin# When we were in Peru in 1985-1986, they apparently switched over 17237c478bd9Sstevel@tonic-gate# sometime between December 29 and January 3 while we were on the Amazon. 17247c478bd9Sstevel@tonic-gate# 17252f9aa4a7Srobbin# From Paul Eggert (2006-03-22): 17262f9aa4a7Srobbin# Shanks & Pottenger don't have this transition. Assume 1986 was like 1987. 17277c478bd9Sstevel@tonic-gate 1728f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 17293508b934SYuri PankovRule Peru 1938 only - Jan 1 0:00 1:00 - 17307c478bd9Sstevel@tonic-gateRule Peru 1938 only - Apr 1 0:00 0 - 17313508b934SYuri PankovRule Peru 1938 1939 - Sep lastSun 0:00 1:00 - 17327c478bd9Sstevel@tonic-gateRule Peru 1939 1940 - Mar Sun>=24 0:00 0 - 17333508b934SYuri PankovRule Peru 1986 1987 - Jan 1 0:00 1:00 - 17347c478bd9Sstevel@tonic-gateRule Peru 1986 1987 - Apr 1 0:00 0 - 17353508b934SYuri PankovRule Peru 1990 only - Jan 1 0:00 1:00 - 17367c478bd9Sstevel@tonic-gateRule Peru 1990 only - Apr 1 0:00 0 - 17372f9aa4a7Srobbin# IATA is ambiguous for 1993/1995; go with Shanks & Pottenger. 17383508b934SYuri PankovRule Peru 1994 only - Jan 1 0:00 1:00 - 17397c478bd9Sstevel@tonic-gateRule Peru 1994 only - Apr 1 0:00 0 - 1740374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 17417c478bd9Sstevel@tonic-gateZone America/Lima -5:08:12 - LMT 1890 17427c478bd9Sstevel@tonic-gate -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time? 1743dafc4501SDan McDonald -5:00 Peru -05/-04 17447c478bd9Sstevel@tonic-gate 17457c478bd9Sstevel@tonic-gate# South Georgia 1746374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 17476f8e8937SDan McDonaldZone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken 1748dafc4501SDan McDonald -2:00 - -02 17497c478bd9Sstevel@tonic-gate 17507c478bd9Sstevel@tonic-gate# South Sandwich Is 17517c478bd9Sstevel@tonic-gate# uninhabited; scientific personnel have wintered 17527c478bd9Sstevel@tonic-gate 17537c478bd9Sstevel@tonic-gate# Suriname 1754374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 17557c478bd9Sstevel@tonic-gateZone America/Paramaribo -3:40:40 - LMT 1911 17567c478bd9Sstevel@tonic-gate -3:40:52 - PMT 1935 # Paramaribo Mean Time 17576f8e8937SDan McDonald -3:40:36 - PMT 1945 Oct # The capital moved? 1758dafc4501SDan McDonald -3:30 - -0330 1984 Oct 1759dafc4501SDan McDonald -3:00 - -03 17607c478bd9Sstevel@tonic-gate 17617c478bd9Sstevel@tonic-gate# Uruguay 176280868c53Srobbin# From Paul Eggert (1993-11-18): 17637c478bd9Sstevel@tonic-gate# Uruguay wins the prize for the strangest peacetime manipulation of the rules. 17643508b934SYuri Pankov# 17653508b934SYuri Pankov# From Tim Parenti (2018-02-20), per Jeremie Bonjour (2018-01-31) and Michael 17663508b934SYuri Pankov# Deckers (2018-02-20): 17673508b934SYuri Pankov# ... At least they kept good records... 17683508b934SYuri Pankov# 17693508b934SYuri Pankov# http://www.armada.mil.uy/ContenidosPDFs/sohma/web/almanaque/almanaque_2018.pdf#page=36 17703508b934SYuri Pankov# Page 36 of Almanaque 2018, published by the Oceanography, Hydrography, and 17713508b934SYuri Pankov# Meteorology Service of the Uruguayan Navy, seems to give many transitions 17723508b934SYuri Pankov# with greater clarity than we've had before. It directly references many laws 17733508b934SYuri Pankov# and decrees which are, in turn, referenced below. They can be viewed in the 17743508b934SYuri Pankov# public archives of the Diario Oficial (in Spanish) at 17753508b934SYuri Pankov# http://www.impo.com.uy/diariooficial/ 17763508b934SYuri Pankov# 17773508b934SYuri Pankov# Ley No. 3920 of 1908-06-10 placed the determination of legal time under the 17783508b934SYuri Pankov# auspices of the National Institute for the Prediction of Time. It is unclear 17793508b934SYuri Pankov# exactly what offset was used during this period, though Ley No. 7200 of 17803508b934SYuri Pankov# 1920-04-23 used the Observatory of the National Meteorological Institute in 17813508b934SYuri Pankov# Montevideo (34° 54' 33" S, 56° 12' 45" W) as its reference meridian, 17823508b934SYuri Pankov# retarding legal time by 15 minutes 9 seconds from 1920-04-30 24:00, 17833508b934SYuri Pankov# resulting in UT-04. Assume the corresponding LMT of UT-03:44:51 (given on 17843508b934SYuri Pankov# page 725 of the Proceedings of the Second Pan-American Scientific Congress, 17853508b934SYuri Pankov# 1915-1916) was in use, and merely became official from 1908-06-10. 17863508b934SYuri Pankov# https://www.impo.com.uy/diariooficial/1908/06/18/12 17873508b934SYuri Pankov# https://www.impo.com.uy/diariooficial/1920/04/27/9 17883508b934SYuri Pankov# 17893508b934SYuri Pankov# Ley No. 7594 of 1923-06-28 specified legal time as Observatory time advanced 17903508b934SYuri Pankov# by 44 minutes 51 seconds (UT-03) "from 30 September to 31 March", and by 14 17913508b934SYuri Pankov# minutes 51 seconds (UT-03:30) "the rest of the year"; a message from the 17923508b934SYuri Pankov# National Council of Administration the same day, published directly below the 17933508b934SYuri Pankov# law in the Diario Oficial, specified the first transition to be 1923-09-30 17943508b934SYuri Pankov# 24:00. This effectively established standard time at UT-03:30 with 30 17953508b934SYuri Pankov# minutes DST. Assume transitions at 24:00 on the specified days until Ley No. 17963508b934SYuri Pankov# 7919 of 1926-03-05 ended this arrangement, repealing all "laws and other 17973508b934SYuri Pankov# provisions which oppose" it, resulting in year-round UT-03:30; a Resolución 17983508b934SYuri Pankov# of 1926-03-11 puts the final transition at 1926-03-31 24:00, the same as it 17993508b934SYuri Pankov# would have been under the previous law. 18003508b934SYuri Pankov# https://www.impo.com.uy/diariooficial/1923/07/02/2 18013508b934SYuri Pankov# https://www.impo.com.uy/diariooficial/1926/03/10/2 18023508b934SYuri Pankov# https://www.impo.com.uy/diariooficial/1926/03/18/2 18033508b934SYuri Pankov# 1804f915e6d3SRobert Mustacchi# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 18053508b934SYuri PankovRule Uruguay 1923 1925 - Oct 1 0:00 0:30 - 18067c478bd9Sstevel@tonic-gateRule Uruguay 1924 1926 - Apr 1 0:00 0 - 18073508b934SYuri Pankov# From Tim Parenti (2018-02-15): 18083508b934SYuri Pankov# http://www.impo.com.uy/diariooficial/1933/10/27/6 18093508b934SYuri Pankov# 18103508b934SYuri Pankov# It appears Ley No. 9122 of 1933 was never published as such in the Diario 18113508b934SYuri Pankov# Oficial, but instead appeared as Document 26 in the Diario on Friday 18123508b934SYuri Pankov# 1933-10-27 as a decree made Monday 1933-10-23 and filed under the Ministry of 18133508b934SYuri Pankov# National Defense. It reinstituted a DST of 30 minutes (to UT-03) "from the 18143508b934SYuri Pankov# last Sunday of October...until the last Saturday of March." In accordance 18153508b934SYuri Pankov# with this provision, the first transition was explicitly specified in Article 18163508b934SYuri Pankov# 2 of the decree as Saturday 1933-10-28 at 24:00; that is, Sunday 1933-10-29 18173508b934SYuri Pankov# at 00:00. Assume transitions at 00:00 Sunday throughout. 18183508b934SYuri Pankov# 18193508b934SYuri Pankov# Departing from the matter-of-fact nature of previous timekeeping laws, the 18203508b934SYuri Pankov# 1933 decree "consider[s] the advantages of...the advance of legal time": 18213508b934SYuri Pankov# 18223508b934SYuri Pankov# "Whereas: The measure adopted by almost all nations at the time of the last 18233508b934SYuri Pankov# World War still persists in North America and Europe, precisely because of 18243508b934SYuri Pankov# the economic, hygienic, and social advantages derived from such an 18253508b934SYuri Pankov# emergency measure... 18263508b934SYuri Pankov# 18273508b934SYuri Pankov# Whereas: The advance of the legal time during the summer seasons, by 18283508b934SYuri Pankov# displacing social activity near sunrise, favors the citizen populations 18293508b934SYuri Pankov# and especially the society that creates and works..." 18303508b934SYuri Pankov# 18313508b934SYuri Pankov# It further specified that "necessary measures" be taken to ensure that 18323508b934SYuri Pankov# "public spectacles finish, in general, before [01:00]." 18333508b934SYuri PankovRule Uruguay 1933 1938 - Oct lastSun 0:00 0:30 - 18343508b934SYuri PankovRule Uruguay 1934 1941 - Mar lastSat 24:00 0 - 18353508b934SYuri Pankov# From Tim Parenti (2018-02-15): 18363508b934SYuri Pankov# Most of the Rules below, and their contemporaneous Zone lines, have been 18373508b934SYuri Pankov# updated simply to match the Almanaque 2018. Although the document does not 18383508b934SYuri Pankov# list exact transition times, midnight transitions were already present in our 18393508b934SYuri Pankov# data here for all transitions through 2004-09, and this is both consistent 18403508b934SYuri Pankov# with prior transitions and verified in several decrees marked below between 18413508b934SYuri Pankov# 1939-09 and 2004-09, wherein the relevant text was typically of the form: 18423508b934SYuri Pankov# 18433508b934SYuri Pankov# "From 0 hours on [date], the legal time of the entire Republic will be... 18443508b934SYuri Pankov# 18453508b934SYuri Pankov# In accordance with [the preceding], on [previous date] at 24 hours, all 18463508b934SYuri Pankov# clocks throughout the Republic will be [advanced/retarded] by..." 18473508b934SYuri Pankov# 18483508b934SYuri Pankov# It is possible that there is greater specificity to be found for the Rules 18493508b934SYuri Pankov# below, but it is buried in no fewer than 40 different decrees individually 18503508b934SYuri Pankov# referenced by the Almanaque for the period from 1939-09 to 2014-09. 18513508b934SYuri Pankov# Four-fifths of these were promulgated less than two weeks before taking 18523508b934SYuri Pankov# effect; more than half within a week and none more than 5 weeks. Only the 18533508b934SYuri Pankov# handful with comments below have been checked with any thoroughness. 18543508b934SYuri PankovRule Uruguay 1939 only - Oct 1 0:00 0:30 - 18553508b934SYuri PankovRule Uruguay 1940 only - Oct 27 0:00 0:30 - 18563508b934SYuri Pankov# From Tim Parenti (2018-02-15): 18573508b934SYuri Pankov# Decreto 1145 of the Ministry of National Defense, dated 1941-07-26, specified 18583508b934SYuri Pankov# UT-03 from Friday 1941-08-01 00:00, citing an "urgent...need to save fuel". 18593508b934SYuri Pankov# http://www.impo.com.uy/diariooficial/1941/08/04/1 18603508b934SYuri PankovRule Uruguay 1941 only - Aug 1 0:00 0:30 - 18613508b934SYuri Pankov# From Tim Parenti (2018-02-15): 18623508b934SYuri Pankov# Decreto 1866 of the Ministry of National Defense, dated 1942-12-09, specified 18633508b934SYuri Pankov# further advancement (to UT-02:30) from Sunday 1942-12-13 24:00. Since clocks 18643508b934SYuri Pankov# never went back to UT-03:30 thereafter, this is modeled as advancing standard 18653508b934SYuri Pankov# time by 30 minutes to UT-03, while retaining 30 minutes of DST. 18663508b934SYuri Pankov# http://www.impo.com.uy/diariooficial/1942/12/16/3 18673508b934SYuri PankovRule Uruguay 1942 only - Dec 14 0:00 0:30 - 18687c478bd9Sstevel@tonic-gateRule Uruguay 1943 only - Mar 14 0:00 0 - 18693508b934SYuri PankovRule Uruguay 1959 only - May 24 0:00 0:30 - 18707c478bd9Sstevel@tonic-gateRule Uruguay 1959 only - Nov 15 0:00 0 - 18713508b934SYuri PankovRule Uruguay 1960 only - Jan 17 0:00 1:00 - 18727c478bd9Sstevel@tonic-gateRule Uruguay 1960 only - Mar 6 0:00 0 - 18733508b934SYuri PankovRule Uruguay 1965 only - Apr 4 0:00 1:00 - 18747c478bd9Sstevel@tonic-gateRule Uruguay 1965 only - Sep 26 0:00 0 - 18753508b934SYuri Pankov# From Tim Parenti (2018-02-15): 18763508b934SYuri Pankov# Decreto 321/968 of 1968-05-25, citing emergency drought measures decreed the 18773508b934SYuri Pankov# day before, brought clocks forward 30 minutes from Monday 1968-05-27 00:00. 18783508b934SYuri Pankov# http://www.impo.com.uy/diariooficial/1968/05/30/5 18793508b934SYuri PankovRule Uruguay 1968 only - May 27 0:00 0:30 - 18803508b934SYuri PankovRule Uruguay 1968 only - Dec 1 0:00 0 - 18813508b934SYuri Pankov# From Tim Parenti (2018-02-15): 18823508b934SYuri Pankov# Decreto 188/970 of 1970-04-23 instituted restrictions on electricity 18833508b934SYuri Pankov# consumption "as a consequence of the current rainfall regime in the country". 18843508b934SYuri Pankov# Articles 13 and 14 advanced clocks by an hour from Saturday 1970-04-25 00:00. 18853508b934SYuri Pankov# http://www.impo.com.uy/diariooficial/1970/04/29/4 18863508b934SYuri PankovRule Uruguay 1970 only - Apr 25 0:00 1:00 - 18873508b934SYuri PankovRule Uruguay 1970 only - Jun 14 0:00 0 - 18883508b934SYuri PankovRule Uruguay 1972 only - Apr 23 0:00 1:00 - 18893508b934SYuri PankovRule Uruguay 1972 only - Jul 16 0:00 0 - 18903508b934SYuri Pankov# From Tim Parenti (2018-02-15): 18913508b934SYuri Pankov# Decreto 29/974 of 1974-01-11, citing "the international rise in the price of 18923508b934SYuri Pankov# oil", advanced clocks by 90 minutes (to UT-01:30). Decreto 163/974 of 18933508b934SYuri Pankov# 1974-03-04 returned 60 of those minutes (to UT-02:30), and the remaining 30 18943508b934SYuri Pankov# minutes followed in Decreto 679/974 of 1974-08-29. 18953508b934SYuri Pankov# http://www.impo.com.uy/diariooficial/1974/01/22/11 18963508b934SYuri Pankov# http://www.impo.com.uy/diariooficial/1974/03/14/3 18973508b934SYuri Pankov# http://www.impo.com.uy/diariooficial/1974/09/04/6 18983508b934SYuri PankovRule Uruguay 1974 only - Jan 13 0:00 1:30 - 18993508b934SYuri PankovRule Uruguay 1974 only - Mar 10 0:00 0:30 - 19003508b934SYuri PankovRule Uruguay 1974 only - Sep 1 0:00 0 - 19013508b934SYuri PankovRule Uruguay 1974 only - Dec 22 0:00 1:00 - 19023508b934SYuri PankovRule Uruguay 1975 only - Mar 30 0:00 0 - 19033508b934SYuri PankovRule Uruguay 1976 only - Dec 19 0:00 1:00 - 19043508b934SYuri PankovRule Uruguay 1977 only - Mar 6 0:00 0 - 19053508b934SYuri PankovRule Uruguay 1977 only - Dec 4 0:00 1:00 - 19063508b934SYuri PankovRule Uruguay 1978 1979 - Mar Sun>=1 0:00 0 - 19073508b934SYuri PankovRule Uruguay 1978 only - Dec 17 0:00 1:00 - 19083508b934SYuri PankovRule Uruguay 1979 only - Apr 29 0:00 1:00 - 19093508b934SYuri PankovRule Uruguay 1980 only - Mar 16 0:00 0 - 19103508b934SYuri Pankov# From Tim Parenti (2018-02-15): 19113508b934SYuri Pankov# Decreto 725/987 of 1987-12-04 cited "better use of national tourist 19123508b934SYuri Pankov# attractions" to advance clocks one hour from Monday 1987-12-14 00:00. 19133508b934SYuri Pankov# http://www.impo.com.uy/diariooficial/1988/01/25/1 19143508b934SYuri PankovRule Uruguay 1987 only - Dec 14 0:00 1:00 - 19153508b934SYuri PankovRule Uruguay 1988 only - Feb 28 0:00 0 - 19163508b934SYuri PankovRule Uruguay 1988 only - Dec 11 0:00 1:00 - 19173508b934SYuri PankovRule Uruguay 1989 only - Mar 5 0:00 0 - 19183508b934SYuri PankovRule Uruguay 1989 only - Oct 29 0:00 1:00 - 19193508b934SYuri PankovRule Uruguay 1990 only - Feb 25 0:00 0 - 19203508b934SYuri Pankov# From Tim Parenti (2018-02-15), per Paul Eggert (1999-11-04): 19213508b934SYuri Pankov# IATA agrees as below for 1990-10 through 1993-02. Per Almanaque 2018, the 19223508b934SYuri Pankov# 1992/1993 season appears to be the first in over half a century where DST 19233508b934SYuri Pankov# both began and ended pursuant to the same decree. 19243508b934SYuri PankovRule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 - 19253508b934SYuri PankovRule Uruguay 1991 1992 - Mar Sun>=1 0:00 0 - 19263508b934SYuri PankovRule Uruguay 1992 only - Oct 18 0:00 1:00 - 19277c478bd9Sstevel@tonic-gateRule Uruguay 1993 only - Feb 28 0:00 0 - 19287c478bd9Sstevel@tonic-gate# From Eduardo Cota (2004-09-20): 19296f8e8937SDan McDonald# The Uruguayan government has decreed a change in the local time.... 19303508b934SYuri Pankov# From Tim Parenti (2018-02-15): 19313508b934SYuri Pankov# Decreto 328/004 of 2004-09-15. 19323508b934SYuri Pankov# http://www.impo.com.uy/diariooficial/2004/09/23/documentos.pdf#page=1 19333508b934SYuri PankovRule Uruguay 2004 only - Sep 19 0:00 1:00 - 193480868c53Srobbin# From Steffen Thorsen (2005-03-11): 193580868c53Srobbin# Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to 193680868c53Srobbin# save energy ... it was postponed two weeks.... 19373508b934SYuri Pankov# From Tim Parenti (2018-02-15): 19383508b934SYuri Pankov# This 2005 postponement is not in Almanaque 2018. Go with the contemporaneous 19393508b934SYuri Pankov# reporting, which is confirmed by Decreto 107/005 of 2005-03-10 amending 19403508b934SYuri Pankov# Decreto 328/004: 19413508b934SYuri Pankov# http://www.impo.com.uy/diariooficial/2005/03/15/documentos.pdf#page=1 19423508b934SYuri Pankov# The original decree specified a transition of 2005-03-12 24:00, but the new 19433508b934SYuri Pankov# one specified 2005-03-27 02:00. 194480868c53SrobbinRule Uruguay 2005 only - Mar 27 2:00 0 - 194580868c53Srobbin# From Eduardo Cota (2005-09-27): 19463508b934SYuri Pankov# ...from 2005-10-09 at 02:00 local time, until 2006-03-12 at 02:00 local time, 19473508b934SYuri Pankov# official time in Uruguay will be at GMT -2. 19483508b934SYuri Pankov# From Tim Parenti (2018-02-15): 19493508b934SYuri Pankov# Decreto 318/005 of 2005-09-19. 19503508b934SYuri Pankov# http://www.impo.com.uy/diariooficial/2005/09/23/documentos.pdf#page=1 19513508b934SYuri PankovRule Uruguay 2005 only - Oct 9 2:00 1:00 - 19523508b934SYuri PankovRule Uruguay 2006 2015 - Mar Sun>=8 2:00 0 - 19533508b934SYuri Pankov# From Tim Parenti (2018-02-15), per Jesper Nørgaard Welen (2006-09-06): 19543508b934SYuri Pankov# Decreto 311/006 of 2006-09-04 established regular DST from the first Sunday 19553508b934SYuri Pankov# of October at 02:00 through the second Sunday of March at 02:00. Almanaque 19563508b934SYuri Pankov# 2018 appears to have a few typoed dates through this period; ignore them. 19573508b934SYuri Pankov# http://www.impo.com.uy/diariooficial/2006/09/08/documentos.pdf#page=1 19583508b934SYuri PankovRule Uruguay 2006 2014 - Oct Sun>=1 2:00 1:00 - 195956b82ca8SDan McDonald# From Steffen Thorsen (2015-06-30): 196056b82ca8SDan McDonald# ... it looks like they will not be using DST the coming summer: 196156b82ca8SDan McDonald# http://www.elobservador.com.uy/gobierno-resolvio-que-no-habra-cambio-horario-verano-n656787 196256b82ca8SDan McDonald# http://www.republica.com.uy/este-ano-no-se-modificara-el-huso-horario-en-uruguay/523760/ 196356b82ca8SDan McDonald# From Paul Eggert (2015-06-30): 196456b82ca8SDan McDonald# Apparently restaurateurs complained that DST caused people to go to the beach 196556b82ca8SDan McDonald# instead of out to dinner. 196656b82ca8SDan McDonald# From Pablo Camargo (2015-07-13): 196756b82ca8SDan McDonald# http://archivo.presidencia.gub.uy/sci/decretos/2015/06/cons_min_201.pdf 19683508b934SYuri Pankov# From Tim Parenti (2018-02-15): 19693508b934SYuri Pankov# Decreto 178/015 of 2015-06-29; repeals Decreto 311/006. 1970dafc4501SDan McDonald 1971dafc4501SDan McDonald# This Zone can be simplified once we assume zic %z. 19723508b934SYuri PankovZone America/Montevideo -3:44:51 - LMT 1908 Jun 10 19733508b934SYuri Pankov -3:44:51 - MMT 1920 May 1 # Montevideo MT 19743508b934SYuri Pankov -4:00 - -04 1923 Oct 1 1975dafc4501SDan McDonald -3:30 Uruguay -0330/-03 1942 Dec 14 19763508b934SYuri Pankov -3:00 Uruguay -03/-0230 1960 1977dafc4501SDan McDonald -3:00 Uruguay -03/-02 1968 19783508b934SYuri Pankov -3:00 Uruguay -03/-0230 1970 1979dafc4501SDan McDonald -3:00 Uruguay -03/-02 1974 19803508b934SYuri Pankov -3:00 Uruguay -03/-0130 1974 Mar 10 1981dafc4501SDan McDonald -3:00 Uruguay -03/-0230 1974 Dec 22 1982dafc4501SDan McDonald -3:00 Uruguay -03/-02 19837c478bd9Sstevel@tonic-gate 19847c478bd9Sstevel@tonic-gate# Venezuela 1985538f0434Srobbin# 198656b82ca8SDan McDonald# From Paul Eggert (2015-07-28): 198756b82ca8SDan McDonald# For the 1965 transition see Gaceta Oficial No. 27.619 (1964-12-15), p 205.533 198856b82ca8SDan McDonald# http://www.pgr.gob.ve/dmdocuments/1964/27619.pdf 198956b82ca8SDan McDonald# 199017d9c33fSrobbin# From John Stainforth (2007-11-28): 199117d9c33fSrobbin# ... the change for Venezuela originally expected for 2007-12-31 has 199217d9c33fSrobbin# been brought forward to 2007-12-09. The official announcement was 19936f8e8937SDan McDonald# published today in the "Gaceta Oficial de la República Bolivariana 19946f8e8937SDan McDonald# de Venezuela, número 38.819" (official document for all laws or 199517d9c33fSrobbin# resolution publication) 199617d9c33fSrobbin# http://www.globovision.com/news.php?nid=72208 1997538f0434Srobbin 1998c2d5ab87SDan McDonald# From Alexander Krivenyshev (2016-04-15): 1999c2d5ab87SDan McDonald# https://actualidad.rt.com/actualidad/204758-venezuela-modificar-huso-horario-sequia-elnino 2000c2d5ab87SDan McDonald# 2001c2d5ab87SDan McDonald# From Paul Eggert (2016-04-15): 2002c2d5ab87SDan McDonald# Clocks advance 30 minutes on 2016-05-01 at 02:30.... 2003c2d5ab87SDan McDonald# "'Venezuela's new time-zone: hours without light, hours without water, 2004c2d5ab87SDan McDonald# hours of presidential broadcasts, hours of lines,' quipped comedian 2005c2d5ab87SDan McDonald# Jean Mary Curró ...". See: Cawthorne A, Kai D. Venezuela scraps 2006c2d5ab87SDan McDonald# half-hour time difference set by Chavez. Reuters 2016-04-15 14:50 -0400 2007b654b02dSYuri Pankov# https://www.reuters.com/article/us-venezuela-timezone-idUSKCN0XC2BE 2008c2d5ab87SDan McDonald# 2009c2d5ab87SDan McDonald# From Matt Johnson (2016-04-20): 2010c2d5ab87SDan McDonald# ... published in the official Gazette [2016-04-18], here: 2011c2d5ab87SDan McDonald# http://historico.tsj.gob.ve/gaceta_ext/abril/1842016/E-1842016-4551.pdf 2012c2d5ab87SDan McDonald 2013374df668SAndy Fiddaman# Zone NAME STDOFF RULES FORMAT [UNTIL] 20147c478bd9Sstevel@tonic-gateZone America/Caracas -4:27:44 - LMT 1890 20157c478bd9Sstevel@tonic-gate -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time? 2016dafc4501SDan McDonald -4:30 - -0430 1965 Jan 1 0:00 2017dafc4501SDan McDonald -4:00 - -04 2007 Dec 9 3:00 2018dafc4501SDan McDonald -4:30 - -0430 2016 May 1 2:30 2019dafc4501SDan McDonald -4:00 - -04 2020