1#ident "%Z%%M% %I% %E% SMI" 2 3# @(#)southamerica 8.6 4# <pre> 5 6# This data is by no means authoritative; if you think you know better, 7# go ahead and edit the file (and please send any changes to 8# tz@elsie.nci.nih.gov for general use in the future). 9 10# From Paul Eggert (2006-03-22): 11# A good source for time zone historical data outside the U.S. is 12# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 13# San Diego: ACS Publications, Inc. (2003). 14# 15# Gwillim Law writes that a good source 16# for recent time zone data is the International Air Transport 17# Association's Standard Schedules Information Manual (IATA SSIM), 18# published semiannually. Law sent in several helpful summaries 19# of the IATA's data after 1990. 20# 21# Except where otherwise noted, Shanks & Pottenger is the source for 22# entries through 1990, and IATA SSIM is the source for entries afterwards. 23# 24# Earlier editions of these tables used the North American style (e.g. ARST and 25# ARDT for Argentine Standard and Daylight Time), but the following quote 26# suggests that it's better to use European style (e.g. ART and ARST). 27# I suggest the use of _Summer time_ instead of the more cumbersome 28# _daylight-saving time_. _Summer time_ seems to be in general use 29# in Europe and South America. 30# -- E O Cutler, _New York Times_ (1937-02-14), quoted in 31# H L Mencken, _The American Language: Supplement I_ (1960), p 466 32# 33# Earlier editions of these tables also used the North American style 34# for time zones in Brazil, but this was incorrect, as Brazilians say 35# "summer time". Reinaldo Goulart, a Sao Paulo businessman active in 36# the railroad sector, writes (1999-07-06): 37# The subject of time zones is currently a matter of discussion/debate in 38# Brazil. Let's say that "the Brasilia time" is considered the 39# "official time" because Brasilia is the capital city. 40# The other three time zones are called "Brasilia time "minus one" or 41# "plus one" or "plus two". As far as I know there is no such 42# name/designation as "Eastern Time" or "Central Time". 43# So I invented the following (English-language) abbreviations for now. 44# Corrections are welcome! 45# std dst 46# -2:00 FNT FNST Fernando de Noronha 47# -3:00 BRT BRST Brasilia 48# -4:00 AMT AMST Amazon 49# -5:00 ACT ACST Acre 50 51############################################################################### 52 53############################################################################### 54 55# Argentina 56 57# From Bob Devine (1988-01-28): 58# Argentina: first Sunday in October to first Sunday in April since 1976. 59# Double Summer time from 1969 to 1974. Switches at midnight. 60 61# From U. S. Naval Observatory (1988-01-199): 62# ARGENTINA 3 H BEHIND UTC 63 64# From Hernan G. Otero (1995-06-26): 65# I am sending modifications to the Argentine time zone table... 66# AR was chosen because they are the ISO letters that represent Argentina. 67 68# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 69Rule Arg 1930 only - Dec 1 0:00 1:00 S 70Rule Arg 1931 only - Apr 1 0:00 0 - 71Rule Arg 1931 only - Oct 15 0:00 1:00 S 72Rule Arg 1932 1940 - Mar 1 0:00 0 - 73Rule Arg 1932 1939 - Nov 1 0:00 1:00 S 74Rule Arg 1940 only - Jul 1 0:00 1:00 S 75Rule Arg 1941 only - Jun 15 0:00 0 - 76Rule Arg 1941 only - Oct 15 0:00 1:00 S 77Rule Arg 1943 only - Aug 1 0:00 0 - 78Rule Arg 1943 only - Oct 15 0:00 1:00 S 79Rule Arg 1946 only - Mar 1 0:00 0 - 80Rule Arg 1946 only - Oct 1 0:00 1:00 S 81Rule Arg 1963 only - Oct 1 0:00 0 - 82Rule Arg 1963 only - Dec 15 0:00 1:00 S 83Rule Arg 1964 1966 - Mar 1 0:00 0 - 84Rule Arg 1964 1966 - Oct 15 0:00 1:00 S 85Rule Arg 1967 only - Apr 2 0:00 0 - 86Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S 87Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 - 88Rule Arg 1974 only - Jan 23 0:00 1:00 S 89Rule Arg 1974 only - May 1 0:00 0 - 90Rule Arg 1988 only - Dec 1 0:00 1:00 S 91# 92# From Hernan G. Otero (1995-06-26): 93# These corrections were contributed by InterSoft Argentina S.A., 94# obtaining the data from the: 95# Talleres de Hidrografia Naval Argentina 96# (Argentine Naval Hydrography Institute) 97Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 - 98Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S 99# 100# From Hernan G. Otero (1995-06-26): 101# From this moment on, the law that mandated the daylight saving 102# time corrections was derogated and no more modifications 103# to the time zones (for daylight saving) are now made. 104# 105# From Rives McDow (2000-01-10): 106# On October 3, 1999, 0:00 local, Argentina implemented daylight savings time, 107# which did not result in the switch of a time zone, as they stayed 9 hours 108# from the International Date Line. 109Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S 110Rule Arg 2000 only - Mar Sun>=1 0:00 0 - 111# 112# From Peter Gradelski via Steffen Thorsen (2000-03-01): 113# We just checked with our Sao Paulo office and they say the government of 114# Argentina decided not to become one of the countries that go on or off DST. 115# So Buenos Aires should be -3 hours from GMT at all times. 116# 117# From Fabian L. Arce Jofre (2000-04-04): 118# The law that claimed DST for Argentina was derogated by President Fernando 119# de la Rua on March 2, 2000, because it would make people spend more energy 120# in the winter time, rather than less. The change took effect on March 3. 121# 122# From Mariano Absatz (2001-06-06): 123# one of the major newspapers here in Argentina said that the 1999 124# Timezone Law (which never was effectively applied) will (would?) be 125# in effect.... The article is at 126# http://ar.clarin.com/diario/2001-06-06/e-01701.htm 127# ... The Law itself is "Ley No 25155", sanctioned on 1999-08-25, enacted 128# 1999-09-17, and published 1999-09-21. The official publication is at: 129# http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF 130# Regretfully, you have to subscribe (and pay) for the on-line version.... 131# 132# (2001-06-12): 133# the timezone for Argentina will not change next Sunday. 134# Apparently it will do so on Sunday 24th.... 135# http://ar.clarin.com/diario/2001-06-12/s-03501.htm 136# 137# (2001-06-25): 138# Last Friday (yes, the last working day before the date of the change), the 139# Senate annulled the 1999 law that introduced the changes later postponed. 140# http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm 141# It remains the vote of the Deputies..., but it will be the same.... 142# This kind of things had always been done this way in Argentina. 143# We are still -03:00 all year round in all of the country. 144# 145# From Mariano Absatz (2004-05-21): 146# Today it was officially published that the Province of Mendoza is changing 147# its timezone this winter... starting tomorrow night.... 148# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf 149# From Paul Eggert (2004-05-24): 150# It's Law No. 7,210. This change is due to a public power emergency, so for 151# now we'll assume it's for this year only. 152# 153# From Paul Eggert (2006-03-22): 154# <a href="http://www.spicasc.net/horvera.html"> 155# Hora de verano para la Republica Argentina (2003-06-08) 156# </a> says that standard time in Argentina from 1894-10-31 157# to 1920-05-01 was -4:16:48.25. Go with this more-precise value 158# over Shanks & Pottenger. 159# 160# From Mariano Absatz (2004-06-05): 161# These media articles from a major newspaper mostly cover the current state: 162# http://www.lanacion.com.ar/04/05/27/de_604825.asp 163# http://www.lanacion.com.ar/04/05/28/de_605203.asp 164# 165# The following eight (8) provinces pulled clocks back to UTC-04:00 at 166# midnight Monday May 31st. (that is, the night between 05/31 and 06/01). 167# Apparently, all nine provinces would go back to UTC-03:00 at the same 168# time in October 17th. 169# 170# Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz, 171# Tierra del Fuego, Tucuman. 172# 173# From Mariano Absatz (2004-06-14): 174# ... this weekend, the Province of Tucuman decided it'd go back to UTC-03:00 175# yesterday midnight (that is, at 24:00 Saturday 12th), since the people's 176# annoyance with the change is much higher than the power savings obtained.... 177# 178# From Gwillim Law (2004-06-14): 179# http://www.lanacion.com.ar/04/06/10/de_609078.asp ... 180# "The time change in Tierra del Fuego was a conflicted decision from 181# the start. The government had decreed that the measure would take 182# effect on June 1, but a normative error forced the new time to begin 183# three days earlier, from a Saturday to a Sunday.... 184# Our understanding was that the change was originally scheduled to take place 185# on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other 186# provinces). Sunday was May 30, only two days earlier. So the article 187# contains a contradiction. I would give more credence to the Saturday/Sunday 188# date than the "three days earlier" phrase, and conclude that Tierra del 189# Fuego set its clocks back at 2004-05-30 00:00. 190# 191# From Steffen Thorsen (2004-10-05): 192# The previous law 7210 which changed the province of Mendoza's time zone 193# back in May have been modified slightly in a new law 7277, which set the 194# new end date to 2004-09-26 (original date was 2004-10-17). 195# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf 196# 197# From Mariano Absatz (2004-10-05): 198# San Juan changed from UTC-03:00 to UTC-04:00 at midnight between 199# Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00 200# at midnight between Saturday, July 24th and Sunday, July 25th.... 201# http://www.sanjuan.gov.ar/prensa/archivo/000329.html 202# http://www.sanjuan.gov.ar/prensa/archivo/000426.html 203# http://www.sanjuan.gov.ar/prensa/archivo/000441.html 204 205# Unless otherwise specified, data are from Shanks & Pottenger through 1992, 206# from the IATA otherwise. As noted below, Shanks & Pottenger say that 207# America/Cordoba split into 6 subregions during 1991/1992, but we 208# haven't verified this yet so for now we'll keep it a single region. 209# 210# Zone NAME GMTOFF RULES FORMAT [UNTIL] 211# 212# Buenos Aires (BA), Capital Federal (CF), 213Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31 214 -4:16:48 - CMT 1920 May # Cordoba Mean Time 215 -4:00 - ART 1930 Dec 216 -4:00 Arg AR%sT 1969 Oct 5 217 -3:00 Arg AR%sT 1999 Oct 3 218 -4:00 Arg AR%sT 2000 Mar 3 219 -3:00 - ART 220# 221# Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN), Chaco (CC), 222# Formosa (FM), Salta (SA), Santiago del Estero (SE), Cordoba (CB), 223# San Luis (SL), La Pampa (LP), Neuquen (NQ), Rio Negro (RN) 224# 225# Shanks & Pottenger also make the following claims, which we haven't verified: 226# - Formosa switched to -3:00 on 1991-01-07. 227# - Misiones switched to -3:00 on 1990-12-29. 228# - Chaco switched to -3:00 on 1991-01-04. 229# - San Luis switched to -4:00 on 1990-03-14, then to -3:00 on 1990-10-15, 230# then to -4:00 on 1991-03-01, then to -3:00 on 1991-06-01. 231# - Santiago del Estero switched to -4:00 on 1991-04-01, 232# then to -3:00 on 1991-04-26. 233# 234Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31 235 -4:16:48 - CMT 1920 May 236 -4:00 - ART 1930 Dec 237 -4:00 Arg AR%sT 1969 Oct 5 238 -3:00 Arg AR%sT 1991 Mar 3 239 -4:00 - WART 1991 Oct 20 240 -3:00 Arg AR%sT 1999 Oct 3 241 -4:00 Arg AR%sT 2000 Mar 3 242 -3:00 - ART 243# 244# Tucuman (TM) 245Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31 246 -4:16:48 - CMT 1920 May 247 -4:00 - ART 1930 Dec 248 -4:00 Arg AR%sT 1969 Oct 5 249 -3:00 Arg AR%sT 1991 Mar 3 250 -4:00 - WART 1991 Oct 20 251 -3:00 Arg AR%sT 1999 Oct 3 252 -4:00 Arg AR%sT 2000 Mar 3 253 -3:00 - ART 2004 Jun 1 254 -4:00 - WART 2004 Jun 13 255 -3:00 - ART 256# 257# La Rioja (LR) 258Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31 259 -4:16:48 - CMT 1920 May 260 -4:00 - ART 1930 Dec 261 -4:00 Arg AR%sT 1969 Oct 5 262 -3:00 Arg AR%sT 1991 Mar 1 263 -4:00 - WART 1991 May 7 264 -3:00 Arg AR%sT 1999 Oct 3 265 -4:00 Arg AR%sT 2000 Mar 3 266 -3:00 - ART 2004 Jun 1 267 -4:00 - WART 2004 Jun 20 268 -3:00 - ART 269# 270# San Juan (SJ) 271Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31 272 -4:16:48 - CMT 1920 May 273 -4:00 - ART 1930 Dec 274 -4:00 Arg AR%sT 1969 Oct 5 275 -3:00 Arg AR%sT 1991 Mar 1 276 -4:00 - WART 1991 May 7 277 -3:00 Arg AR%sT 1999 Oct 3 278 -4:00 Arg AR%sT 2000 Mar 3 279 -3:00 - ART 2004 May 31 280 -4:00 - WART 2004 Jul 25 281 -3:00 - ART 282# 283# Jujuy (JY) 284Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31 285 -4:16:48 - CMT 1920 May 286 -4:00 - ART 1930 Dec 287 -4:00 Arg AR%sT 1969 Oct 5 288 -3:00 Arg AR%sT 1990 Mar 4 289 -4:00 - WART 1990 Oct 28 290 -4:00 1:00 WARST 1991 Mar 17 291 -4:00 - WART 1991 Oct 6 292 -3:00 1:00 ARST 1992 293 -3:00 Arg AR%sT 1999 Oct 3 294 -4:00 Arg AR%sT 2000 Mar 3 295 -3:00 - ART 296# 297# Catamarca (CT), Chubut (CH) 298Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31 299 -4:16:48 - CMT 1920 May 300 -4:00 - ART 1930 Dec 301 -4:00 Arg AR%sT 1969 Oct 5 302 -3:00 Arg AR%sT 1991 Mar 3 303 -4:00 - WART 1991 Oct 20 304 -3:00 Arg AR%sT 1999 Oct 3 305 -4:00 Arg AR%sT 2000 Mar 3 306 -3:00 - ART 2004 Jun 1 307 -4:00 - WART 2004 Jun 20 308 -3:00 - ART 309# 310# Mendoza (MZ) 311Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31 312 -4:16:48 - CMT 1920 May 313 -4:00 - ART 1930 Dec 314 -4:00 Arg AR%sT 1969 Oct 5 315 -3:00 Arg AR%sT 1990 Mar 4 316 -4:00 - WART 1990 Oct 15 317 -4:00 1:00 WARST 1991 Mar 1 318 -4:00 - WART 1991 Oct 15 319 -4:00 1:00 WARST 1992 Mar 1 320 -4:00 - WART 1992 Oct 18 321 -3:00 Arg AR%sT 1999 Oct 3 322 -4:00 Arg AR%sT 2000 Mar 3 323 -3:00 - ART 2004 May 23 324 -4:00 - WART 2004 Sep 26 325 -3:00 - ART 326# 327# Santa Cruz (SC) 328Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31 329 -4:16:48 - CMT 1920 May # Cordoba Mean Time 330 -4:00 - ART 1930 Dec 331 -4:00 Arg AR%sT 1969 Oct 5 332 -3:00 Arg AR%sT 1999 Oct 3 333 -4:00 Arg AR%sT 2000 Mar 3 334 -3:00 - ART 2004 Jun 1 335 -4:00 - WART 2004 Jun 20 336 -3:00 - ART 337# 338# Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF) 339Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31 340 -4:16:48 - CMT 1920 May # Cordoba Mean Time 341 -4:00 - ART 1930 Dec 342 -4:00 Arg AR%sT 1969 Oct 5 343 -3:00 Arg AR%sT 1999 Oct 3 344 -4:00 Arg AR%sT 2000 Mar 3 345 -3:00 - ART 2004 May 30 346 -4:00 - WART 2004 Jun 20 347 -3:00 - ART 348 349# Aruba 350# Zone NAME GMTOFF RULES FORMAT [UNTIL] 351Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad 352 -4:30 - ANT 1965 # Netherlands Antilles Time 353 -4:00 - AST 354 355# Bolivia 356# Zone NAME GMTOFF RULES FORMAT [UNTIL] 357Zone America/La_Paz -4:32:36 - LMT 1890 358 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT 359 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST 360 -4:00 - BOT # Bolivia Time 361 362# Brazil 363 364# From Paul Eggert (1993-11-18): 365# The mayor of Rio recently attempted to change the time zone rules 366# just in his city, in order to leave more summer time for the tourist trade. 367# The rule change lasted only part of the day; 368# the federal government refused to follow the city's rules, and business 369# was in a chaos, so the mayor backed down that afternoon. 370 371# From IATA SSIM (1996-02): 372# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS), 373# Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ), 374# Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO), 375# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL]. 376# [The last three states are new to this issue of the IATA SSIM.] 377 378# From Gwillim Law (1996-10-07): 379# Geography, history (Tocantins was part of Goias until 1989), and other 380# sources of time zone information lead me to believe that AL, SE, and TO were 381# always in BR1, and so the only change was whether or not they observed DST.... 382# The earliest issue of the SSIM I have is 2/91. Each issue from then until 383# 9/95 says that DST is observed only in the ten states I quoted from 9/95, 384# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2 385# (UTC-4).... The other two time zones given for Brazil are BR3, which is 386# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is 387# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's 388# become part of the state of Pernambuco). The boundary between BR1 and BR2 389# has never been clearly stated. They've simply been called East and West. 390# However, some conclusions can be drawn from another IATA manual: the Airline 391# Coding Directory, which lists close to 400 airports in Brazil. For each 392# airport it gives a time zone which is coded to the SSIM. From that 393# information, I'm led to conclude that the states of Amapa (AP), Ceara (CE), 394# Maranhao (MA), Paraiba (PR), Pernambuco (PE), Piaui (PI), and Rio Grande do 395# Norte (RN), and the eastern part of Para (PA) are all in BR1 without DST. 396 397# From Marcos Tadeu (1998-09-27): 398# <a href="http://pcdsh01.on.br/verao1.html"> 399# Brazilian official page 400# </a> 401 402# From Jesper Norgaard (2000-11-03): 403# [For an official list of which regions in Brazil use which time zones, see:] 404# http://pcdsh01.on.br/Fusbr.htm 405# http://pcdsh01.on.br/Fusbrhv.htm 406 407# From Celso Doria via David Madeo (2002-10-09): 408# The reason for the delay this year has to do with elections in Brazil. 409# 410# Unlike in the United States, elections in Brazil are 100% computerized and 411# the results are known almost immediately. Yesterday, it was the first 412# round of the elections when 115 million Brazilians voted for President, 413# Governor, Senators, Federal Deputies, and State Deputies. Nobody is 414# counting (or re-counting) votes anymore and we know there will be a second 415# round for the Presidency and also for some Governors. The 2nd round will 416# take place on October 27th. 417# 418# The reason why the DST will only begin November 3rd is that the thousands 419# of electoral machines used cannot have their time changed, and since the 420# Constitution says the elections must begin at 8:00 AM and end at 5:00 PM, 421# the Government decided to postpone DST, instead of changing the Constitution 422# (maybe, for the next elections, it will be possible to change the clock)... 423 424# From Rodrigo Severo (2004-10-04): 425# It's just the biannual change made necessary by the much hyped, supposedly 426# modern Brazilian eletronic voting machines which, apparently, can't deal 427# with a time change between the first and the second rounds of the elections. 428 429# From Paul Eggert (2002-10-10): 430# The official decrees referenced below are mostly taken from 431# <a href="http://pcdsh01.on.br/DecHV.html"> 432# Decretos sobre o Horario de Verao no Brasil 433# </a>. 434 435# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 436# Decree <a href="http://pcdsh01.on.br/HV20466.htm">20,466</a> (1931-10-01) 437# Decree <a href="http://pcdsh01.on.br/HV21896.htm">21,896</a> (1932-01-10) 438Rule Brazil 1931 only - Oct 3 11:00 1:00 S 439Rule Brazil 1932 1933 - Apr 1 0:00 0 - 440Rule Brazil 1932 only - Oct 3 0:00 1:00 S 441# Decree <a href="http://pcdsh01.on.br/HV23195.htm">23,195</a> (1933-10-10) 442# revoked DST. 443# Decree <a href="http://pcdsh01.on.br/HV27496.htm">27,496</a> (1949-11-24) 444# Decree <a href="http://pcdsh01.on.br/HV27998.htm">27,998</a> (1950-04-13) 445Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S 446Rule Brazil 1950 only - Apr 16 1:00 0 - 447Rule Brazil 1951 1952 - Apr 1 0:00 0 - 448# Decree <a href="http://pcdsh01.on.br/HV32308.htm">32,308</a> (1953-02-24) 449Rule Brazil 1953 only - Mar 1 0:00 0 - 450# Decree <a href="http://pcdsh01.on.br/HV34724.htm">34,724</a> (1953-11-30) 451# revoked DST. 452# Decree <a href="http://pcdsh01.on.br/HV52700.htm">52,700</a> (1963-10-18) 453# established DST from 1963-10-23 00:00 to 1964-02-29 00:00 454# in SP, RJ, GB, MG, ES, due to the prolongation of the drought. 455# Decree <a href="http://pcdsh01.on.br/HV53071.htm">53,071</a> (1963-12-03) 456# extended the above decree to all of the national territory on 12-09. 457Rule Brazil 1963 only - Dec 9 0:00 1:00 S 458# Decree <a href="http://pcdsh01.on.br/HV53604.htm">53,604</a> (1964-02-25) 459# extended summer time by one day to 1964-03-01 00:00 (start of school). 460Rule Brazil 1964 only - Mar 1 0:00 0 - 461# Decree <a href="http://pcdsh01.on.br/HV55639.htm">55,639</a> (1965-01-27) 462Rule Brazil 1965 only - Jan 31 0:00 1:00 S 463Rule Brazil 1965 only - Mar 31 0:00 0 - 464# Decree <a href="http://pcdsh01.on.br/HV57303.htm">57,303</a> (1965-11-22) 465Rule Brazil 1965 only - Dec 1 0:00 1:00 S 466# Decree <a href="http://pcdsh01.on.br/HV57843.htm">57,843</a> (1966-02-18) 467Rule Brazil 1966 1968 - Mar 1 0:00 0 - 468Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S 469# Decree <a href="http://pcdsh01.on.br/HV63429.htm">63,429</a> (1968-10-15) 470# revoked DST. 471# Decree <a href="http://pcdsh01.on.br/HV91698.htm">91,698</a> (1985-09-27) 472Rule Brazil 1985 only - Nov 2 0:00 1:00 S 473# Decree 92,310 (1986-01-21) 474# Decree 92,463 (1986-03-13) 475Rule Brazil 1986 only - Mar 15 0:00 0 - 476# Decree 93,316 (1986-10-01) 477Rule Brazil 1986 only - Oct 25 0:00 1:00 S 478Rule Brazil 1987 only - Feb 14 0:00 0 - 479# Decree <a href="http://pcdsh01.on.br/HV94922.htm">94,922</a> (1987-09-22) 480Rule Brazil 1987 only - Oct 25 0:00 1:00 S 481Rule Brazil 1988 only - Feb 7 0:00 0 - 482# Decree <a href="http://pcdsh01.on.br/HV96676.htm">96,676</a> (1988-09-12) 483# except for the states of AC, AM, PA, RR, RO, and AP (then a territory) 484Rule Brazil 1988 only - Oct 16 0:00 1:00 S 485Rule Brazil 1989 only - Jan 29 0:00 0 - 486# Decree <a href="http://pcdsh01.on.br/HV98077.htm">98,077</a> (1989-08-21) 487# with the same exceptions 488Rule Brazil 1989 only - Oct 15 0:00 1:00 S 489Rule Brazil 1990 only - Feb 11 0:00 0 - 490# Decree <a href="http://pcdsh01.on.br/HV99530.htm">99,530</a> (1990-09-17) 491# adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF. 492# Decree 99,629 (1990-10-19) adds BA, MT. 493Rule Brazil 1990 only - Oct 21 0:00 1:00 S 494Rule Brazil 1991 only - Feb 17 0:00 0 - 495# <a href="http://pcdsh01.on.br/HV1991.htm">Unnumbered decree</a> (1991-09-25) 496# adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF. 497Rule Brazil 1991 only - Oct 20 0:00 1:00 S 498Rule Brazil 1992 only - Feb 9 0:00 0 - 499# <a href="http://pcdsh01.on.br/HV1992.htm">Unnumbered decree</a> (1992-10-16) 500# adopted by same states. 501Rule Brazil 1992 only - Oct 25 0:00 1:00 S 502Rule Brazil 1993 only - Jan 31 0:00 0 - 503# Decree <a href="http://pcdsh01.on.br/HV942.htm">942</a> (1993-09-28) 504# adopted by same states, plus AM. 505# Decree <a href="http://pcdsh01.on.br/HV1252.htm">1,252</a> (1994-09-22; 506# web page corrected 2004-01-07) adopted by same states, minus AM. 507# Decree <a href="http://pcdsh01.on.br/HV1636.htm">1,636</a> (1995-09-14) 508# adopted by same states, plus MT and TO. 509# Decree <a href="http://pcdsh01.on.br/HV1674.htm">1,674</a> (1995-10-13) 510# adds AL, SE. 511Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S 512Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 - 513Rule Brazil 1996 only - Feb 11 0:00 0 - 514# Decree <a href="http://pcdsh01.on.br/HV2000.htm">2,000</a> (1996-09-04) 515# adopted by same states, minus AL, SE. 516Rule Brazil 1996 only - Oct 6 0:00 1:00 S 517Rule Brazil 1997 only - Feb 16 0:00 0 - 518# From Daniel C. Sobral (1998-02-12): 519# In 1997, the DS began on October 6. The stated reason was that 520# because international television networks ignored Brazil's policy on DS, 521# they bought the wrong times on satellite for coverage of Pope's visit. 522# This year, the ending date of DS was postponed to March 1 523# to help dealing with the shortages of electric power. 524# 525# Decree 2,317 (1997-09-04), adopted by same states. 526Rule Brazil 1997 only - Oct 6 0:00 1:00 S 527# Decree <a href="http://pcdsh01.on.br/figuras/HV2495.JPG">2,495</a> 528# (1998-02-10) 529Rule Brazil 1998 only - Mar 1 0:00 0 - 530# Decree <a href="http://pcdsh01.on.br/figuras/Hv98.jpg">2,780</a> (1998-09-11) 531# adopted by the same states as before. 532Rule Brazil 1998 only - Oct 11 0:00 1:00 S 533Rule Brazil 1999 only - Feb 21 0:00 0 - 534# Decree <a href="http://pcdsh01.on.br/figuras/HV3150.gif">3,150</a> 535# (1999-08-23) adopted by same states. 536# Decree <a href="http://pcdsh01.on.br/DecHV99.gif">3,188</a> (1999-09-30) 537# adds SE, AL, PB, PE, RN, CE, PI, MA and RR. 538Rule Brazil 1999 only - Oct 3 0:00 1:00 S 539Rule Brazil 2000 only - Feb 27 0:00 0 - 540# Decree <a href="http://pcdsh01.on.br/DEC3592.htm">3,592</a> (2000-09-06) 541# adopted by the same states as before. 542# Decree <a href="http://pcdsh01.on.br/Dec3630.jpg">3,630</a> (2000-10-13) 543# repeals DST in PE and RR, effective 2000-10-15 00:00. 544# Decree <a href="http://pcdsh01.on.br/Dec3632.jpg">3,632</a> (2000-10-17) 545# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00. 546# Decree <a href="http://pcdsh01.on.br/figuras/HV3916.gif">3,916</a> 547# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE. 548Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S 549Rule Brazil 2001 2006 - Feb Sun>=15 0:00 0 - 550# Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE. 551# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm"></a> 552Rule Brazil 2002 only - Nov 3 0:00 1:00 S 553# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO. 554# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm"></a> 555Rule Brazil 2003 only - Oct 19 0:00 1:00 S 556# Decree 5,223 (2004-10-01) reestablishes DST in MT. 557# <a href="http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm"></a> 558Rule Brazil 2004 only - Nov 2 0:00 1:00 S 559# Decree <a href="http://pcdsh01.on.br/DecHV5539.gif">5,539</a> (2005-09-19), 560# adopted by the same states as before. 561Rule Brazil 2005 only - Oct 16 0:00 1:00 S 562# Decree <a href="http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2006/Decreto/D5920.htm">5,920</a> 563# (2006-10-03), adopted by the same states as before. 564Rule Brazil 2006 max - Nov Sun>=1 0:00 1:00 S 565Rule Brazil 2007 max - Feb lastSun 0:00 0 - 566# The latest ruleset listed above says that the following states observe DST: 567# DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP. 568# For dates after mid-2007, the above rules with TO="max" are guesses 569# and are quite possibly wrong, but are more likely than no DST at all. 570 571 572# Zone NAME GMTOFF RULES FORMAT [UNTIL] 573# 574# Fernando de Noronha (administratively part of PE) 575Zone America/Noronha -2:09:40 - LMT 1914 576 -2:00 Brazil FN%sT 1990 Sep 17 577 -2:00 - FNT 1999 Sep 30 578 -2:00 Brazil FN%sT 2000 Oct 15 579 -2:00 - FNT 2001 Sep 13 580 -2:00 Brazil FN%sT 2002 Oct 1 581 -2:00 - FNT 582# Other Atlantic islands have no permanent settlement. 583# These include Trindade and Martin Vaz (administratively part of ES), 584# Atol das Rocas (RN), and Penedos de Sao Pedro e Sao Paulo (PE). 585# Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01; 586# it also included the Penedos. 587# 588# Amapa (AP), east Para (PA) 589# East Para includes Belem, Maraba, Serra Norte, and Sao Felix do Xingu. 590# The division between east and west Para is the river Xingu. 591# In the north a very small part from the river Javary (now Jari I guess, 592# the border with Amapa) to the Amazon, then to the Xingu. 593Zone America/Belem -3:13:56 - LMT 1914 594 -3:00 Brazil BR%sT 1988 Sep 12 595 -3:00 - BRT 596# 597# Maranhao (MA), Piaui (PI), Ceara (CE), Rio Grande do Norte (RN), 598# Paraiba (PB) 599Zone America/Fortaleza -2:34:00 - LMT 1914 600 -3:00 Brazil BR%sT 1990 Sep 17 601 -3:00 - BRT 1999 Sep 30 602 -3:00 Brazil BR%sT 2000 Oct 22 603 -3:00 - BRT 2001 Sep 13 604 -3:00 Brazil BR%sT 2002 Oct 1 605 -3:00 - BRT 606# 607# Pernambuco (PE) (except Atlantic islands) 608Zone America/Recife -2:19:36 - LMT 1914 609 -3:00 Brazil BR%sT 1990 Sep 17 610 -3:00 - BRT 1999 Sep 30 611 -3:00 Brazil BR%sT 2000 Oct 15 612 -3:00 - BRT 2001 Sep 13 613 -3:00 Brazil BR%sT 2002 Oct 1 614 -3:00 - BRT 615# 616# Tocantins (TO) 617Zone America/Araguaina -3:12:48 - LMT 1914 618 -3:00 Brazil BR%sT 1990 Sep 17 619 -3:00 - BRT 1995 Sep 14 620 -3:00 Brazil BR%sT 2003 Sep 24 621 -3:00 - BRT 622# 623# Alagoas (AL), Sergipe (SE) 624Zone America/Maceio -2:22:52 - LMT 1914 625 -3:00 Brazil BR%sT 1990 Sep 17 626 -3:00 - BRT 1995 Oct 13 627 -3:00 Brazil BR%sT 1996 Sep 4 628 -3:00 - BRT 1999 Sep 30 629 -3:00 Brazil BR%sT 2000 Oct 22 630 -3:00 - BRT 2001 Sep 13 631 -3:00 Brazil BR%sT 2002 Oct 1 632 -3:00 - BRT 633# 634# Bahia (BA) 635# There are too many Salvadors elsewhere, so use America/Bahia instead 636# of America/Salvador. 637Zone America/Bahia -2:34:04 - LMT 1914 638 -3:00 Brazil BR%sT 2003 Sep 24 639 -3:00 - BRT 640# 641# Goias (GO), Distrito Federal (DF), Minas Gerais (MG), 642# Espirito Santo (ES), Rio de Janeiro (RJ), Sao Paulo (SP), Parana (PR), 643# Santa Catarina (SC), Rio Grande do Sul (RS) 644Zone America/Sao_Paulo -3:06:28 - LMT 1914 645 -3:00 Brazil BR%sT 1963 Oct 23 00:00 646 -3:00 1:00 BRST 1964 647 -3:00 Brazil BR%sT 648# 649# Mato Grosso do Sul (MS) 650Zone America/Campo_Grande -3:38:28 - LMT 1914 651 -4:00 Brazil AM%sT 652# 653# Mato Grosso (MT) 654Zone America/Cuiaba -3:44:20 - LMT 1914 655 -4:00 Brazil AM%sT 2003 Sep 24 656 -4:00 - AMT 2004 Oct 1 657 -4:00 Brazil AM%sT 658# 659# west Para (PA), Rondonia (RO) 660# West Para includes Altamira, Oribidos, Prainha, Oriximina, and Santarem. 661Zone America/Porto_Velho -4:15:36 - LMT 1914 662 -4:00 Brazil AM%sT 1988 Sep 12 663 -4:00 - AMT 664# 665# Roraima (RR) 666Zone America/Boa_Vista -4:02:40 - LMT 1914 667 -4:00 Brazil AM%sT 1988 Sep 12 668 -4:00 - AMT 1999 Sep 30 669 -4:00 Brazil AM%sT 2000 Oct 15 670 -4:00 - AMT 671# 672# east Amazonas (AM): Boca do Acre, Jutai, Manaus, Floriano Peixoto 673# The great circle line from Tabatinga to Porto Acre divides 674# east from west Amazonas. 675Zone America/Manaus -4:00:04 - LMT 1914 676 -4:00 Brazil AM%sT 1988 Sep 12 677 -4:00 - AMT 1993 Sep 28 678 -4:00 Brazil AM%sT 1994 Sep 22 679 -4:00 - AMT 680# 681# west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant, 682# Eirunepe, Envira, Ipixuna 683Zone America/Eirunepe -4:39:28 - LMT 1914 684 -5:00 Brazil AC%sT 1988 Sep 12 685 -5:00 - ACT 1993 Sep 28 686 -5:00 Brazil AC%sT 1994 Sep 22 687 -5:00 - ACT 688# 689# Acre (AC) 690Zone America/Rio_Branco -4:31:12 - LMT 1914 691 -5:00 Brazil AC%sT 1988 Sep 12 692 -5:00 - ACT 693 694 695# Chile 696 697# From Eduardo Krell (1995-10-19): 698# The law says to switch to DST at midnight [24:00] on the second SATURDAY 699# of October.... The law is the same for March and October. 700# (1998-09-29): 701# Because of the drought this year, the government decided to go into 702# DST earlier (saturday 9/26 at 24:00). This is a one-time change only ... 703# (unless there's another dry season next year, I guess). 704 705# From Julio I. Pacheco Troncoso (1999-03-18): 706# Because of the same drought, the government decided to end DST later, 707# on April 3, (one-time change). 708 709# From Oscar van Vlijmen (2006-10-08): 710# http://www.horaoficial.cl/cambio.htm 711 712# From Jesper Norgaard Welen (2006-10-08): 713# I think that there are some obvious mistakes in the suggested link 714# from Oscar van Vlijmen,... for instance entry 66 says that GMT-4 715# ended 1990-09-12 while entry 67 only begins GMT-3 at 1990-09-15 716# (they should have been 1990-09-15 and 1990-09-16 respectively), but 717# anyhow it clears up some doubts too. 718 719# The following data are from <http://www.horaoficial.cl/horaof.htm> 720# (2006-09-20), transcribed by Jesper Norgaard Welen. 721 722# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 723Rule Chile 1927 1932 - Sep 1 0:00 1:00 S 724Rule Chile 1928 1932 - Apr 1 0:00 0 - 725Rule Chile 1942 only - Jun 1 4:00u 0 - 726Rule Chile 1942 only - Aug 1 5:00u 1:00 S 727Rule Chile 1946 only - Jul 15 4:00u 1:00 S 728Rule Chile 1946 only - Sep 1 3:00u 0:00 - 729Rule Chile 1947 only - Apr 1 4:00u 0 - 730Rule Chile 1968 only - Nov 3 4:00u 1:00 S 731Rule Chile 1969 only - Mar 30 3:00u 0 - 732Rule Chile 1969 only - Nov 23 4:00u 1:00 S 733Rule Chile 1970 only - Mar 29 3:00u 0 - 734Rule Chile 1971 only - Mar 14 3:00u 0 - 735Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S 736Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 - 737Rule Chile 1973 only - Sep 30 4:00u 1:00 S 738Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S 739Rule Chile 1987 only - Apr 12 3:00u 0 - 740Rule Chile 1988 1989 - Mar Sun>=9 3:00u 0 - 741Rule Chile 1988 only - Oct Sun>=1 4:00u 1:00 S 742Rule Chile 1989 only - Oct Sun>=9 4:00u 1:00 S 743Rule Chile 1990 only - Mar 18 3:00u 0 - 744Rule Chile 1990 only - Sep 16 4:00u 1:00 S 745Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 - 746Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S 747Rule Chile 1997 only - Mar 30 3:00u 0 - 748Rule Chile 1998 only - Mar Sun>=9 3:00u 0 - 749Rule Chile 1998 only - Sep 27 4:00u 1:00 S 750Rule Chile 1999 only - Apr 4 3:00u 0 - 751Rule Chile 1999 max - Oct Sun>=9 4:00u 1:00 S 752Rule Chile 2000 max - Mar Sun>=9 3:00u 0 - 753# IATA SSIM anomalies: (1992-02) says 1992-03-14; 754# (1996-09) says 1998-03-08. Ignore these. 755# Zone NAME GMTOFF RULES FORMAT [UNTIL] 756Zone America/Santiago -4:42:46 - LMT 1890 757 -4:42:46 - SMT 1910 # Santiago Mean Time 758 -5:00 - CLT 1916 Jul 1 # Chile Time 759 -4:42:46 - SMT 1918 Sep 1 # Santiago Mean Time 760 -4:00 - CLT 1919 Jul 1 # Chile Time 761 -4:42:46 - SMT 1927 Sep 1 # Santiago Mean Time 762 -5:00 Chile CL%sT 1947 May 22 # Chile Time 763 -4:00 Chile CL%sT 764Zone Pacific/Easter -7:17:28 - LMT 1890 # Mataveri 765 -7:17:28 - MMT 1932 Sep # Mataveri Mean Time 766 -7:00 Chile EAS%sT 1982 Jan 18 21:00 # Easter I Time 767 -6:00 Chile EAS%sT 768# 769# Sala y Gomez Island is like Pacific/Easter. 770# Other Chilean locations, including Juan Fernandez Is, San Ambrosio, 771# San Felix, and Antarctic bases, are like America/Santiago. 772 773# Colombia 774# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 775Rule CO 1992 only - May 3 0:00 1:00 S 776Rule CO 1993 only - Apr 4 0:00 0 - 777# Zone NAME GMTOFF RULES FORMAT [UNTIL] 778Zone America/Bogota -4:56:20 - LMT 1884 Mar 13 779 -4:56:20 - BMT 1914 Nov 23 # Bogota Mean Time 780 -5:00 CO CO%sT # Colombia Time 781# Malpelo, Providencia, San Andres 782# no information; probably like America/Bogota 783 784# Curacao 785# 786# From Paul Eggert (2006-03-22): 787# Shanks & Pottenger say that The Bottom and Philipsburg have been at 788# -4:00 since standard time was introduced on 1912-03-02; and that 789# Kralendijk and Rincon used Kralendijk Mean Time (-4:33:08) from 790# 1912-02-02 to 1965-01-01. The former is dubious, since S&P also say 791# Saba Island has been like Curacao. 792# This all predates our 1970 cutoff, though. 793# 794# By July 2007 Curacao and St Maarten are planned to become 795# associated states within the Netherlands, much like Aruba; 796# Bonaire, Saba and St Eustatius would become directly part of the 797# Netherlands as Kingdom Islands. This won't affect their time zones 798# though, as far as we know. 799# 800# Zone NAME GMTOFF RULES FORMAT [UNTIL] 801Zone America/Curacao -4:35:44 - LMT 1912 Feb 12 # Willemstad 802 -4:30 - ANT 1965 # Netherlands Antilles Time 803 -4:00 - AST 804 805# Ecuador 806# Zone NAME GMTOFF RULES FORMAT [UNTIL] 807Zone America/Guayaquil -5:19:20 - LMT 1890 808 -5:14:00 - QMT 1931 # Quito Mean Time 809 -5:00 - ECT # Ecuador Time 810Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno 811 -5:00 - ECT 1986 812 -6:00 - GALT # Galapagos Time 813 814# Falklands 815 816# From Paul Eggert (2006-03-22): 817# Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except 818# the IATA gives 1996-09-08. Go with Shanks & Pottenger. 819 820# From Falkland Islands Government Office, London (2001-01-22) 821# via Jesper Norgaard: 822# ... the clocks revert back to Local Mean Time at 2 am on Sunday 15 823# April 2001 and advance one hour to summer time at 2 am on Sunday 2 824# September. It is anticipated that the clocks will revert back at 2 825# am on Sunday 21 April 2002 and advance to summer time at 2 am on 826# Sunday 1 September. 827 828# From Rives McDow (2001-02-13): 829# 830# I have communicated several times with people there, and the last 831# time I had communications that was helpful was in 1998. Here is 832# what was said then: 833# 834# "The general rule was that Stanley used daylight saving and the Camp 835# did not. However for various reasons many people in the Camp have 836# started to use daylight saving (known locally as 'Stanley Time') 837# There is no rule as to who uses daylight saving - it is a matter of 838# personal choice and so it is impossible to draw a map showing who 839# uses it and who does not. Any list would be out of date as soon as 840# it was produced. This year daylight saving ended on April 18/19th 841# and started again on September 12/13th. I do not know what the rule 842# is, but can find out if you like. We do not change at the same time 843# as UK or Chile." 844# 845# I did have in my notes that the rule was "Second Saturday in Sep at 846# 0:00 until third Saturday in Apr at 0:00". I think that this does 847# not agree in some cases with Shanks; is this true? 848# 849# Also, there is no mention in the list that some areas in the 850# Falklands do not use DST. I have found in my communications there 851# that these areas are on the western half of East Falkland and all of 852# West Falkland. Stanley is the only place that consistently observes 853# DST. Again, as in other places in the world, the farmers don't like 854# it. West Falkland is almost entirely sheep farmers. 855# 856# I know one lady there that keeps a list of which farm keeps DST and 857# which doesn't each year. She runs a shop in Stanley, and says that 858# the list changes each year. She uses it to communicate to her 859# customers, catching them when they are home for lunch or dinner. 860 861# From Paul Eggert (2001-03-05): 862# For now, we'll just record the time in Stanley, since we have no 863# better info. 864 865# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 866Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S 867Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 - 868Rule Falk 1939 only - Oct 1 0:00 1:00 S 869Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S 870Rule Falk 1943 only - Jan 1 0:00 0 - 871Rule Falk 1983 only - Sep lastSun 0:00 1:00 S 872Rule Falk 1984 1985 - Apr lastSun 0:00 0 - 873Rule Falk 1984 only - Sep 16 0:00 1:00 S 874Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S 875Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 - 876Rule Falk 2001 max - Apr Sun>=15 2:00 0 - 877Rule Falk 2001 max - Sep Sun>=1 2:00 1:00 S 878# Zone NAME GMTOFF RULES FORMAT [UNTIL] 879Zone Atlantic/Stanley -3:51:24 - LMT 1890 880 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time 881 -4:00 Falk FK%sT 1983 May # Falkland Is Time 882 -3:00 Falk FK%sT 1985 Sep 15 883 -4:00 Falk FK%sT 884 885# French Guiana 886# Zone NAME GMTOFF RULES FORMAT [UNTIL] 887Zone America/Cayenne -3:29:20 - LMT 1911 Jul 888 -4:00 - GFT 1967 Oct # French Guiana Time 889 -3:00 - GFT 890 891# Guyana 892# Zone NAME GMTOFF RULES FORMAT [UNTIL] 893Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown 894 -3:45 - GBGT 1966 May 26 # Br Guiana Time 895 -3:45 - GYT 1975 Jul 31 # Guyana Time 896 -3:00 - GYT 1991 897# IATA SSIM (1996-06) says -4:00. Assume a 1991 switch. 898 -4:00 - GYT 899 900# Paraguay 901# From Paul Eggert (2006-03-22): 902# Shanks & Pottenger say that spring transitions are from 01:00 -> 02:00, 903# and autumn transitions are from 00:00 -> 23:00. Go with pre-1999 904# editions of Shanks, and with the IATA, who say transitions occur at 00:00. 905# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 906Rule Para 1975 1988 - Oct 1 0:00 1:00 S 907Rule Para 1975 1978 - Mar 1 0:00 0 - 908Rule Para 1979 1991 - Apr 1 0:00 0 - 909Rule Para 1989 only - Oct 22 0:00 1:00 S 910Rule Para 1990 only - Oct 1 0:00 1:00 S 911Rule Para 1991 only - Oct 6 0:00 1:00 S 912Rule Para 1992 only - Mar 1 0:00 0 - 913Rule Para 1992 only - Oct 5 0:00 1:00 S 914Rule Para 1993 only - Mar 31 0:00 0 - 915Rule Para 1993 1995 - Oct 1 0:00 1:00 S 916Rule Para 1994 1995 - Feb lastSun 0:00 0 - 917Rule Para 1996 only - Mar 1 0:00 0 - 918# IATA SSIM (2000-02) says 1999-10-10; ignore this for now. 919# From Steffen Thorsen (2000-10-02): 920# I have three independent reports that Paraguay changed to DST this Sunday 921# (10-01). 922# 923# Translated by Gwillim Law (2001-02-27) from 924# <a href="http://www.diarionoticias.com.py/011000/nacional/naciona1.htm"> 925# Noticias, a daily paper in Asuncion, Paraguay (2000-10-01) 926# </a>: 927# Starting at 0:00 today, the clock will be set forward 60 minutes, in 928# fulfillment of Decree No. 7,273 of the Executive Power.... The time change 929# system has been operating for several years. Formerly there was a separate 930# decree each year; the new law has the same effect, but permanently. Every 931# year, the time will change on the first Sunday of October; likewise, the 932# clock will be set back on the first Sunday of March. 933# 934Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S 935# IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger. 936Rule Para 1997 only - Feb lastSun 0:00 0 - 937# Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but 938# (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27). 939Rule Para 1998 2001 - Mar Sun>=1 0:00 0 - 940# From Rives McDow (2002-02-28): 941# A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the 942# dst method to be from the first Sunday in September to the first Sunday in 943# April. 944Rule Para 2002 2004 - Apr Sun>=1 0:00 0 - 945Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S 946# 947# From Jesper Norgaard Welen (2005-01-02): 948# There are several sources that claim that Paraguay made 949# a timezone rule change in autumn 2004. 950# From Steffen Thorsen (2005-01-05): 951# Decree 1,867 (2004-03-05) 952# From Carlos Raul Perasso via Jesper Norgaard Welen (2006-10-13) 953# <http://www.presidencia.gov.py/decretos/D1867.pdf> 954Rule Para 2004 max - Oct Sun>=15 0:00 1:00 S 955Rule Para 2005 max - Mar Sun>=8 0:00 0 - 956 957# Zone NAME GMTOFF RULES FORMAT [UNTIL] 958Zone America/Asuncion -3:50:40 - LMT 1890 959 -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time 960 -4:00 - PYT 1972 Oct # Paraguay Time 961 -3:00 - PYT 1974 Apr 962 -4:00 Para PY%sT 963 964# Peru 965# 966# <a href="news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net"> 967# From Evelyn C. Leeper via Mark Brader (2003-10-26):</a> 968# When we were in Peru in 1985-1986, they apparently switched over 969# sometime between December 29 and January 3 while we were on the Amazon. 970# 971# From Paul Eggert (2006-03-22): 972# Shanks & Pottenger don't have this transition. Assume 1986 was like 1987. 973 974# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 975Rule Peru 1938 only - Jan 1 0:00 1:00 S 976Rule Peru 1938 only - Apr 1 0:00 0 - 977Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S 978Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 - 979Rule Peru 1986 1987 - Jan 1 0:00 1:00 S 980Rule Peru 1986 1987 - Apr 1 0:00 0 - 981Rule Peru 1990 only - Jan 1 0:00 1:00 S 982Rule Peru 1990 only - Apr 1 0:00 0 - 983# IATA is ambiguous for 1993/1995; go with Shanks & Pottenger. 984Rule Peru 1994 only - Jan 1 0:00 1:00 S 985Rule Peru 1994 only - Apr 1 0:00 0 - 986# Zone NAME GMTOFF RULES FORMAT [UNTIL] 987Zone America/Lima -5:08:12 - LMT 1890 988 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time? 989 -5:00 Peru PE%sT # Peru Time 990 991# South Georgia 992# Zone NAME GMTOFF RULES FORMAT [UNTIL] 993Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken 994 -2:00 - GST # South Georgia Time 995 996# South Sandwich Is 997# uninhabited; scientific personnel have wintered 998 999# Suriname 1000# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1001Zone America/Paramaribo -3:40:40 - LMT 1911 1002 -3:40:52 - PMT 1935 # Paramaribo Mean Time 1003 -3:40:36 - PMT 1945 Oct # The capital moved? 1004 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time 1005 -3:30 - SRT 1984 Oct # Suriname Time 1006 -3:00 - SRT 1007 1008# Trinidad and Tobago 1009# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1010Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2 1011 -4:00 - AST 1012 1013# Uruguay 1014# From Paul Eggert (1993-11-18): 1015# Uruguay wins the prize for the strangest peacetime manipulation of the rules. 1016# From Shanks & Pottenger: 1017# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1018# Whitman gives 1923 Oct 1; go with Shanks & Pottenger. 1019Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS 1020Rule Uruguay 1924 1926 - Apr 1 0:00 0 - 1021Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS 1022Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS 1023# Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman. 1024Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 - 1025Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS 1026Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 - 1027# Whitman gives 1937 Oct 3; go with Shanks & Pottenger. 1028Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS 1029# Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13, 1030# and 1943 Apr 13 ``to present time''; go with Shanks & Pottenger. 1031Rule Uruguay 1941 only - Aug 1 0:00 0:30 HS 1032Rule Uruguay 1942 only - Jan 1 0:00 0 - 1033Rule Uruguay 1942 only - Dec 14 0:00 1:00 S 1034Rule Uruguay 1943 only - Mar 14 0:00 0 - 1035Rule Uruguay 1959 only - May 24 0:00 1:00 S 1036Rule Uruguay 1959 only - Nov 15 0:00 0 - 1037Rule Uruguay 1960 only - Jan 17 0:00 1:00 S 1038Rule Uruguay 1960 only - Mar 6 0:00 0 - 1039Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S 1040Rule Uruguay 1965 only - Sep 26 0:00 0 - 1041Rule Uruguay 1966 1967 - Oct 31 0:00 0 - 1042Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS 1043Rule Uruguay 1968 1970 - Dec 2 0:00 0 - 1044Rule Uruguay 1972 only - Apr 24 0:00 1:00 S 1045Rule Uruguay 1972 only - Aug 15 0:00 0 - 1046Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS 1047Rule Uruguay 1974 only - Dec 22 0:00 1:00 S 1048Rule Uruguay 1976 only - Oct 1 0:00 0 - 1049Rule Uruguay 1977 only - Dec 4 0:00 1:00 S 1050Rule Uruguay 1978 only - Apr 1 0:00 0 - 1051Rule Uruguay 1979 only - Oct 1 0:00 1:00 S 1052Rule Uruguay 1980 only - May 1 0:00 0 - 1053Rule Uruguay 1987 only - Dec 14 0:00 1:00 S 1054Rule Uruguay 1988 only - Mar 14 0:00 0 - 1055Rule Uruguay 1988 only - Dec 11 0:00 1:00 S 1056Rule Uruguay 1989 only - Mar 12 0:00 0 - 1057Rule Uruguay 1989 only - Oct 29 0:00 1:00 S 1058# Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2, 1059# and that 1992/3's DST was from 10-25 to 03-01. Go with IATA. 1060Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 - 1061Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S 1062Rule Uruguay 1992 only - Oct 18 0:00 1:00 S 1063Rule Uruguay 1993 only - Feb 28 0:00 0 - 1064# From Eduardo Cota (2004-09-20): 1065# The uruguayan government has decreed a change in the local time.... 1066# http://www.presidencia.gub.uy/decretos/2004091502.htm 1067Rule Uruguay 2004 only - Sep 19 0:00 1:00 S 1068# From Steffen Thorsen (2005-03-11): 1069# Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to 1070# save energy ... it was postponed two weeks.... 1071# http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm 1072Rule Uruguay 2005 only - Mar 27 2:00 0 - 1073# From Eduardo Cota (2005-09-27): 1074# http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF 1075# This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at 1076# 02:00 local time, official time in Uruguay will be at GMT -2. 1077Rule Uruguay 2005 only - Oct 9 2:00 1:00 S 1078Rule Uruguay 2006 only - Mar 12 2:00 0 - 1079# From Jesper Norgaard Welen (2006-09-06): 1080# http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF 1081Rule Uruguay 2006 max - Oct Sun>=1 2:00 1:00 S 1082Rule Uruguay 2007 max - Mar Sun>=8 2:00 0 - 1083# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1084Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28 1085 -3:44:44 - MMT 1920 May 1 # Montevideo MT 1086 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time 1087 -3:00 Uruguay UY%sT 1088 1089# Venezuela 1090# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1091Zone America/Caracas -4:27:44 - LMT 1890 1092 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time? 1093 -4:30 - VET 1965 # Venezuela Time 1094 -4:00 - VET 1095