1# <pre> 2# This file is in the public domain, so clarified as of 3# 2009-05-17 by Arthur David Olson. 4 5# This data is by no means authoritative; if you think you know better, 6# go ahead and edit the file (and please send any changes to 7# tz@iana.org for general use in the future). 8 9# From Paul Eggert (2006-03-22): 10# A good source for time zone historical data outside the U.S. is 11# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 12# San Diego: ACS Publications, Inc. (2003). 13# 14# For data circa 1899, a common source is: 15# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 16# <http://www.jstor.org/stable/1774359>. 17# 18# Gwillim Law writes that a good source 19# for recent time zone data is the International Air Transport 20# Association's Standard Schedules Information Manual (IATA SSIM), 21# published semiannually. Law sent in several helpful summaries 22# of the IATA's data after 1990. 23# 24# Except where otherwise noted, Shanks & Pottenger is the source for 25# entries through 1990, and IATA SSIM is the source for entries afterwards. 26# 27# Earlier editions of these tables used the North American style (e.g. ARST and 28# ARDT for Argentine Standard and Daylight Time), but the following quote 29# suggests that it's better to use European style (e.g. ART and ARST). 30# I suggest the use of _Summer time_ instead of the more cumbersome 31# _daylight-saving time_. _Summer time_ seems to be in general use 32# in Europe and South America. 33# -- E O Cutler, _New York Times_ (1937-02-14), quoted in 34# H L Mencken, _The American Language: Supplement I_ (1960), p 466 35# 36# Earlier editions of these tables also used the North American style 37# for time zones in Brazil, but this was incorrect, as Brazilians say 38# "summer time". Reinaldo Goulart, a Sao Paulo businessman active in 39# the railroad sector, writes (1999-07-06): 40# The subject of time zones is currently a matter of discussion/debate in 41# Brazil. Let's say that "the Brasilia time" is considered the 42# "official time" because Brasilia is the capital city. 43# The other three time zones are called "Brasilia time "minus one" or 44# "plus one" or "plus two". As far as I know there is no such 45# name/designation as "Eastern Time" or "Central Time". 46# So I invented the following (English-language) abbreviations for now. 47# Corrections are welcome! 48# std dst 49# -2:00 FNT FNST Fernando de Noronha 50# -3:00 BRT BRST Brasilia 51# -4:00 AMT AMST Amazon 52# -5:00 ACT ACST Acre 53 54############################################################################### 55 56############################################################################### 57 58# Argentina 59 60# From Bob Devine (1988-01-28): 61# Argentina: first Sunday in October to first Sunday in April since 1976. 62# Double Summer time from 1969 to 1974. Switches at midnight. 63 64# From U. S. Naval Observatory (1988-01-199): 65# ARGENTINA 3 H BEHIND UTC 66 67# From Hernan G. Otero (1995-06-26): 68# I am sending modifications to the Argentine time zone table... 69# AR was chosen because they are the ISO letters that represent Argentina. 70 71# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 72Rule Arg 1930 only - Dec 1 0:00 1:00 S 73Rule Arg 1931 only - Apr 1 0:00 0 - 74Rule Arg 1931 only - Oct 15 0:00 1:00 S 75Rule Arg 1932 1940 - Mar 1 0:00 0 - 76Rule Arg 1932 1939 - Nov 1 0:00 1:00 S 77Rule Arg 1940 only - Jul 1 0:00 1:00 S 78Rule Arg 1941 only - Jun 15 0:00 0 - 79Rule Arg 1941 only - Oct 15 0:00 1:00 S 80Rule Arg 1943 only - Aug 1 0:00 0 - 81Rule Arg 1943 only - Oct 15 0:00 1:00 S 82Rule Arg 1946 only - Mar 1 0:00 0 - 83Rule Arg 1946 only - Oct 1 0:00 1:00 S 84Rule Arg 1963 only - Oct 1 0:00 0 - 85Rule Arg 1963 only - Dec 15 0:00 1:00 S 86Rule Arg 1964 1966 - Mar 1 0:00 0 - 87Rule Arg 1964 1966 - Oct 15 0:00 1:00 S 88Rule Arg 1967 only - Apr 2 0:00 0 - 89Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S 90Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 - 91Rule Arg 1974 only - Jan 23 0:00 1:00 S 92Rule Arg 1974 only - May 1 0:00 0 - 93Rule Arg 1988 only - Dec 1 0:00 1:00 S 94# 95# From Hernan G. Otero (1995-06-26): 96# These corrections were contributed by InterSoft Argentina S.A., 97# obtaining the data from the: 98# Talleres de Hidrografia Naval Argentina 99# (Argentine Naval Hydrography Institute) 100Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 - 101Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S 102# 103# From Hernan G. Otero (1995-06-26): 104# From this moment on, the law that mandated the daylight saving 105# time corrections was derogated and no more modifications 106# to the time zones (for daylight saving) are now made. 107# 108# From Rives McDow (2000-01-10): 109# On October 3, 1999, 0:00 local, Argentina implemented daylight savings time, 110# which did not result in the switch of a time zone, as they stayed 9 hours 111# from the International Date Line. 112Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S 113# From Paul Eggert (2007-12-28): 114# DST was set to expire on March 5, not March 3, but since it was converted 115# to standard time on March 3 it's more convenient for us to pretend that 116# it ended on March 3. 117Rule Arg 2000 only - Mar 3 0:00 0 - 118# 119# From Peter Gradelski via Steffen Thorsen (2000-03-01): 120# We just checked with our Sao Paulo office and they say the government of 121# Argentina decided not to become one of the countries that go on or off DST. 122# So Buenos Aires should be -3 hours from GMT at all times. 123# 124# From Fabian L. Arce Jofre (2000-04-04): 125# The law that claimed DST for Argentina was derogated by President Fernando 126# de la Rua on March 2, 2000, because it would make people spend more energy 127# in the winter time, rather than less. The change took effect on March 3. 128# 129# From Mariano Absatz (2001-06-06): 130# one of the major newspapers here in Argentina said that the 1999 131# Timezone Law (which never was effectively applied) will (would?) be 132# in effect.... The article is at 133# http://ar.clarin.com/diario/2001-06-06/e-01701.htm 134# ... The Law itself is "Ley No 25155", sanctioned on 1999-08-25, enacted 135# 1999-09-17, and published 1999-09-21. The official publication is at: 136# http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF 137# Regretfully, you have to subscribe (and pay) for the on-line version.... 138# 139# (2001-06-12): 140# the timezone for Argentina will not change next Sunday. 141# Apparently it will do so on Sunday 24th.... 142# http://ar.clarin.com/diario/2001-06-12/s-03501.htm 143# 144# (2001-06-25): 145# Last Friday (yes, the last working day before the date of the change), the 146# Senate annulled the 1999 law that introduced the changes later postponed. 147# http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm 148# It remains the vote of the Deputies..., but it will be the same.... 149# This kind of things had always been done this way in Argentina. 150# We are still -03:00 all year round in all of the country. 151# 152# From Steffen Thorsen (2007-12-21): 153# A user (Leonardo Chaim) reported that Argentina will adopt DST.... 154# all of the country (all Zone-entries) are affected. News reports like 155# http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate 156# that Argentina will use DST next year as well, from October to 157# March, although exact rules are not given. 158# 159# From Jesper Norgaard Welen (2007-12-26) 160# The last hurdle of Argentina DST is over, the proposal was approved in 161# the lower chamber too (Deputados) with a vote 192 for and 2 against. 162# By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to 163# the original scanned proposal, where the dates and the zero hours are 164# clear and unambiguous...This is the article about final approval: 165# <a href="http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996"> 166# http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996 167# </a> 168# 169# From Paul Eggert (2007-12-22): 170# For dates after mid-2008, the following rules are my guesses and 171# are quite possibly wrong, but are more likely than no DST at all. 172 173# From Alexander Krivenyshev (2008-09-05): 174# As per message from Carlos Alberto Fonseca Arauz (Nicaragua), 175# Argentina will start DST on Sunday October 19, 2008. 176# 177# <a href="http://www.worldtimezone.com/dst_news/dst_news_argentina03.html"> 178# http://www.worldtimezone.com/dst_news/dst_news_argentina03.html 179# </a> 180# OR 181# <a href="http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish)"> 182# http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish) 183# </a> 184 185# From Rodrigo Severo (2008-10-06): 186# Here is some info available at a Gentoo bug related to TZ on Argentina's DST: 187# ... 188# ------- Comment #1 from [jmdocile] 2008-10-06 16:28 0000 ------- 189# Hi, there is a problem with timezone-data-2008e and maybe with 190# timezone-data-2008f 191# Argentinian law [Number] 25.155 is no longer valid. 192# <a href="http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm"> 193# http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm 194# </a> 195# The new one is law [Number] 26.350 196# <a href="http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm"> 197# http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm 198# </a> 199# So there is no summer time in Argentina for now. 200 201# From Mariano Absatz (2008-10-20): 202# Decree 1693/2008 applies Law 26.350 for the summer 2008/2009 establishing DST in Argentina 203# From 2008-10-19 until 2009-03-15 204# <a href="http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01"> 205# http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01 206# </a> 207# 208# Decree 1705/2008 excepting 12 Provinces from applying DST in the summer 2008/2009: 209# Catamarca, La Rioja, Mendoza, Salta, San Juan, San Luis, La Pampa, Neuquen, Rio Negro, Chubut, Santa Cruz 210# and Tierra del Fuego 211# <a href="http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01"> 212# http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01 213# </a> 214# 215# Press release 235 dated Saturday October 18th, from the Government of the Province of Jujuy saying 216# it will not apply DST either (even when it was not included in Decree 1705/2008) 217# <a href="http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc"> 218# http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc 219# </a> 220 221# From fullinet (2009-10-18): 222# As announced in 223# <a hef="http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356"> 224# http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356 225# </a> 226# (an official .gob.ar) under title: "Sin Cambio de Hora" (english: "No hour change") 227# 228# "Por el momento, el Gobierno Nacional resolvio no modificar la hora 229# oficial, decision que estaba en estudio para su implementacion el 230# domingo 18 de octubre. Desde el Ministerio de Planificacion se anuncio 231# que la Argentina hoy, en estas condiciones meteorologicas, no necesita 232# la modificacion del huso horario, ya que 2009 nos encuentra con 233# crecimiento en la produccion y distribucion energetica." 234 235Rule Arg 2007 only - Dec 30 0:00 1:00 S 236Rule Arg 2008 2009 - Mar Sun>=15 0:00 0 - 237Rule Arg 2008 only - Oct Sun>=15 0:00 1:00 S 238 239# From Mariano Absatz (2004-05-21): 240# Today it was officially published that the Province of Mendoza is changing 241# its timezone this winter... starting tomorrow night.... 242# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf 243# From Paul Eggert (2004-05-24): 244# It's Law No. 7,210. This change is due to a public power emergency, so for 245# now we'll assume it's for this year only. 246# 247# From Paul Eggert (2006-03-22): 248# <a href="http://www.spicasc.net/horvera.html"> 249# Hora de verano para la Republica Argentina (2003-06-08) 250# </a> says that standard time in Argentina from 1894-10-31 251# to 1920-05-01 was -4:16:48.25. Go with this more-precise value 252# over Shanks & Pottenger. 253# 254# From Mariano Absatz (2004-06-05): 255# These media articles from a major newspaper mostly cover the current state: 256# http://www.lanacion.com.ar/04/05/27/de_604825.asp 257# http://www.lanacion.com.ar/04/05/28/de_605203.asp 258# 259# The following eight (8) provinces pulled clocks back to UTC-04:00 at 260# midnight Monday May 31st. (that is, the night between 05/31 and 06/01). 261# Apparently, all nine provinces would go back to UTC-03:00 at the same 262# time in October 17th. 263# 264# Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz, 265# Tierra del Fuego, Tucuman. 266# 267# From Mariano Absatz (2004-06-14): 268# ... this weekend, the Province of Tucuman decided it'd go back to UTC-03:00 269# yesterday midnight (that is, at 24:00 Saturday 12th), since the people's 270# annoyance with the change is much higher than the power savings obtained.... 271# 272# From Gwillim Law (2004-06-14): 273# http://www.lanacion.com.ar/04/06/10/de_609078.asp ... 274# "The time change in Tierra del Fuego was a conflicted decision from 275# the start. The government had decreed that the measure would take 276# effect on June 1, but a normative error forced the new time to begin 277# three days earlier, from a Saturday to a Sunday.... 278# Our understanding was that the change was originally scheduled to take place 279# on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other 280# provinces). Sunday was May 30, only two days earlier. So the article 281# contains a contradiction. I would give more credence to the Saturday/Sunday 282# date than the "three days earlier" phrase, and conclude that Tierra del 283# Fuego set its clocks back at 2004-05-30 00:00. 284# 285# From Steffen Thorsen (2004-10-05): 286# The previous law 7210 which changed the province of Mendoza's time zone 287# back in May have been modified slightly in a new law 7277, which set the 288# new end date to 2004-09-26 (original date was 2004-10-17). 289# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf 290# 291# From Mariano Absatz (2004-10-05): 292# San Juan changed from UTC-03:00 to UTC-04:00 at midnight between 293# Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00 294# at midnight between Saturday, July 24th and Sunday, July 25th.... 295# http://www.sanjuan.gov.ar/prensa/archivo/000329.html 296# http://www.sanjuan.gov.ar/prensa/archivo/000426.html 297# http://www.sanjuan.gov.ar/prensa/archivo/000441.html 298 299# From Alex Krivenyshev (2008-01-17): 300# Here are articles that Argentina Province San Luis is planning to end DST 301# as earlier as upcoming Monday January 21, 2008 or February 2008: 302# 303# Provincia argentina retrasa reloj y marca diferencia con resto del pais 304# (Argentine Province delayed clock and mark difference with the rest of the 305# country) 306# <a href="http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel"> 307# http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel 308# </a> 309# 310# Es inminente que en San Luis atrasen una hora los relojes 311# (It is imminent in San Luis clocks one hour delay) 312# <a href="http://www.lagaceta.com.ar/vernotae.asp?id_nota=253414"> 313# http://www.lagaceta.com.ar/vernotae.asp?id_nota=253414 314# </a> 315# 316# <a href="http://www.worldtimezone.net/dst_news/dst_news_argentina02.html"> 317# http://www.worldtimezone.net/dst_news/dst_news_argentina02.html 318# </a> 319 320# From Jesper Norgaard Welen (2008-01-18): 321# The page of the San Luis provincial government 322# <a href="http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812"> 323# http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812 324# </a> 325# confirms what Alex Krivenyshev has earlier sent to the tz 326# emailing list about that San Luis plans to return to standard 327# time much earlier than the rest of the country. It also 328# confirms that upon request the provinces San Juan and Mendoza 329# refused to follow San Luis in this change. 330# 331# The change is supposed to take place Monday the 21.st at 0:00 332# hours. As far as I understand it if this goes ahead, we need 333# a new timezone for San Luis (although there are also documented 334# independent changes in the southamerica file of San Luis in 335# 1990 and 1991 which has not been confirmed). 336 337# From Jesper Norgaard Welen (2008-01-25): 338# Unfortunately the below page has become defunct, about the San Luis 339# time change. Perhaps because it now is part of a group of pages "Most 340# important pages of 2008." 341# 342# You can use 343# <a href="http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834"> 344# http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834 345# </a> 346# instead it seems. Or use "Buscador" from the main page of the San Luis 347# government, and fill in "huso" and click OK, and you will get 3 pages 348# from which the first one is identical to the above. 349 350# From Mariano Absatz (2008-01-28): 351# I can confirm that the Province of San Luis (and so far only that 352# province) decided to go back to UTC-3 effective midnight Jan 20th 2008 353# (that is, Monday 21st at 0:00 is the time the clocks were delayed back 354# 1 hour), and they intend to keep UTC-3 as their timezone all year round 355# (that is, unless they change their mind any minute now). 356# 357# So we'll have to add yet another city to 'southamerica' (I think San 358# Luis city is the mos populated city in the Province, so it'd be 359# America/Argentina/San_Luis... of course I can't remember if San Luis's 360# history of particular changes goes along with Mendoza or San Juan :-( 361# (I only remember not being able to collect hard facts about San Luis 362# back in 2004, when these provinces changed to UTC-4 for a few days, I 363# mailed them personally and never got an answer). 364 365# From Paul Eggert (2008-06-30): 366# Unless otherwise specified, data are from Shanks & Pottenger through 1992, 367# from the IATA otherwise. As noted below, Shanks & Pottenger say that 368# America/Cordoba split into 6 subregions during 1991/1992, one of which 369# was America/San_Luis, but we haven't verified this yet so for now we'll 370# keep America/Cordoba a single region rather than splitting it into the 371# other 5 subregions. 372 373# From Mariano Absatz (2009-03-13): 374# Yesterday (with our usual 2-day notice) the Province of San Luis 375# decided that next Sunday instead of "staying" @utc-03:00 they will go 376# to utc-04:00 until the second Saturday in October... 377# 378# The press release is at 379# <a href="http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102"> 380# http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102 381# </a> 382# (I couldn't find the decree, but 383# <a href="http://www.sanluis.gov.ar"> 384# www.sanluis.gov.ar 385# <a/> 386# is the official page for the Province Government). 387# 388# There's also a note in only one of the major national papers ... 389# http://www.lanacion.com.ar/nota.asp?nota_id=1107912 390# 391# The press release says [quick and dirty translation]: 392# ... announced that next Sunday, at 00:00, Puntanos (the San Luis 393# inhabitants) will have to turn back one hour their clocks 394# 395# Since then, San Luis will establish its own Province timezone. Thus, 396# during 2009, this timezone change will run from 00:00 the third Sunday 397# in March until 24:00 of the second Saturday in October. 398 399# From Mariano Absatz (2009-10-16): 400# ...the Province of San Luis is a case in itself. 401# 402# The Law at 403# <a href="http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276>" 404# http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276 405# </a> 406# is ambiguous because establishes a calendar from the 2nd Sunday in 407# October at 0:00 thru the 2nd Saturday in March at 24:00 and the 408# complement of that starting on the 2nd Sunday of March at 0:00 and 409# ending on the 2nd Saturday of March at 24:00. 410# 411# This clearly breaks every time the 1st of March or October is a Sunday. 412# 413# IMHO, the "spirit of the Law" is to make the changes at 0:00 on the 2nd 414# Sunday of October and March. 415# 416# The problem is that the changes in the rest of the Provinces that did 417# change in 2007/2008, were made according to the Federal Law and Decrees 418# that did so on the 3rd Sunday of October and March. 419# 420# In fact, San Luis actually switched from UTC-4 to UTC-3 last Sunday 421# (October 11th) at 0:00. 422# 423# So I guess a new set of rules, besides "Arg", must be made and the last 424# America/Argentina/San_Luis entries should change to use these... 425# 426# I'm enclosing a patch that does what I say... regretfully, the San Luis 427# timezone must be called "WART/WARST" even when most of the time (like, 428# right now) WARST == ART... that is, since last Sunday, all the country 429# is using UTC-3, but in my patch, San Luis calls it "WARST" and the rest 430# of the country calls it "ART". 431# ... 432 433# From Alexander Krivenyshev (2010-04-09): 434# According to news reports from El Diario de la Republica Province San 435# Luis, Argentina (standard time UTC-04) will keep Daylight Saving Time 436# after April 11, 2010--will continue to have same time as rest of 437# Argentina (UTC-3) (no DST). 438# 439# Confirmaron la prórroga del huso horario de verano (Spanish) 440# <a href="http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9"> 441# http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9 442# </a> 443# or (some English translation): 444# <a href="http://www.worldtimezone.com/dst_news/dst_news_argentina08.html"> 445# http://www.worldtimezone.com/dst_news/dst_news_argentina08.html 446# </a> 447 448# From Mariano Absatz (2010-04-12): 449# yes...I can confirm this...and given that San Luis keeps calling 450# UTC-03:00 "summer time", we should't just let San Luis go back to "Arg" 451# rules...San Luis is still using "Western ARgentina Time" and it got 452# stuck on Summer daylight savings time even though the summer is over. 453 454# From Paul Eggert (2013-02-21): 455# Milne says Cordoba time was -4:16:48.2. Round to the nearest second. 456 457# Zone NAME GMTOFF RULES FORMAT [UNTIL] 458# 459# Buenos Aires (BA), Capital Federal (CF), 460Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31 461 -4:16:48 - CMT 1920 May # Cordoba Mean Time 462 -4:00 - ART 1930 Dec 463 -4:00 Arg AR%sT 1969 Oct 5 464 -3:00 Arg AR%sT 1999 Oct 3 465 -4:00 Arg AR%sT 2000 Mar 3 466 -3:00 Arg AR%sT 467# 468# Cordoba (CB), Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN), 469# Chaco (CC), Formosa (FM), Santiago del Estero (SE) 470# 471# Shanks & Pottenger also make the following claims, which we haven't verified: 472# - Formosa switched to -3:00 on 1991-01-07. 473# - Misiones switched to -3:00 on 1990-12-29. 474# - Chaco switched to -3:00 on 1991-01-04. 475# - Santiago del Estero switched to -4:00 on 1991-04-01, 476# then to -3:00 on 1991-04-26. 477# 478Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31 479 -4:16:48 - CMT 1920 May 480 -4:00 - ART 1930 Dec 481 -4:00 Arg AR%sT 1969 Oct 5 482 -3:00 Arg AR%sT 1991 Mar 3 483 -4:00 - WART 1991 Oct 20 484 -3:00 Arg AR%sT 1999 Oct 3 485 -4:00 Arg AR%sT 2000 Mar 3 486 -3:00 Arg AR%sT 487# 488# Salta (SA), La Pampa (LP), Neuquen (NQ), Rio Negro (RN) 489Zone America/Argentina/Salta -4:21:40 - LMT 1894 Oct 31 490 -4:16:48 - CMT 1920 May 491 -4:00 - ART 1930 Dec 492 -4:00 Arg AR%sT 1969 Oct 5 493 -3:00 Arg AR%sT 1991 Mar 3 494 -4:00 - WART 1991 Oct 20 495 -3:00 Arg AR%sT 1999 Oct 3 496 -4:00 Arg AR%sT 2000 Mar 3 497 -3:00 Arg AR%sT 2008 Oct 18 498 -3:00 - ART 499# 500# Tucuman (TM) 501Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31 502 -4:16:48 - CMT 1920 May 503 -4:00 - ART 1930 Dec 504 -4:00 Arg AR%sT 1969 Oct 5 505 -3:00 Arg AR%sT 1991 Mar 3 506 -4:00 - WART 1991 Oct 20 507 -3:00 Arg AR%sT 1999 Oct 3 508 -4:00 Arg AR%sT 2000 Mar 3 509 -3:00 - ART 2004 Jun 1 510 -4:00 - WART 2004 Jun 13 511 -3:00 Arg AR%sT 512# 513# La Rioja (LR) 514Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31 515 -4:16:48 - CMT 1920 May 516 -4:00 - ART 1930 Dec 517 -4:00 Arg AR%sT 1969 Oct 5 518 -3:00 Arg AR%sT 1991 Mar 1 519 -4:00 - WART 1991 May 7 520 -3:00 Arg AR%sT 1999 Oct 3 521 -4:00 Arg AR%sT 2000 Mar 3 522 -3:00 - ART 2004 Jun 1 523 -4:00 - WART 2004 Jun 20 524 -3:00 Arg AR%sT 2008 Oct 18 525 -3:00 - ART 526# 527# San Juan (SJ) 528Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31 529 -4:16:48 - CMT 1920 May 530 -4:00 - ART 1930 Dec 531 -4:00 Arg AR%sT 1969 Oct 5 532 -3:00 Arg AR%sT 1991 Mar 1 533 -4:00 - WART 1991 May 7 534 -3:00 Arg AR%sT 1999 Oct 3 535 -4:00 Arg AR%sT 2000 Mar 3 536 -3:00 - ART 2004 May 31 537 -4:00 - WART 2004 Jul 25 538 -3:00 Arg AR%sT 2008 Oct 18 539 -3:00 - ART 540# 541# Jujuy (JY) 542Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31 543 -4:16:48 - CMT 1920 May 544 -4:00 - ART 1930 Dec 545 -4:00 Arg AR%sT 1969 Oct 5 546 -3:00 Arg AR%sT 1990 Mar 4 547 -4:00 - WART 1990 Oct 28 548 -4:00 1:00 WARST 1991 Mar 17 549 -4:00 - WART 1991 Oct 6 550 -3:00 1:00 ARST 1992 551 -3:00 Arg AR%sT 1999 Oct 3 552 -4:00 Arg AR%sT 2000 Mar 3 553 -3:00 Arg AR%sT 2008 Oct 18 554 -3:00 - ART 555# 556# Catamarca (CT), Chubut (CH) 557Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31 558 -4:16:48 - CMT 1920 May 559 -4:00 - ART 1930 Dec 560 -4:00 Arg AR%sT 1969 Oct 5 561 -3:00 Arg AR%sT 1991 Mar 3 562 -4:00 - WART 1991 Oct 20 563 -3:00 Arg AR%sT 1999 Oct 3 564 -4:00 Arg AR%sT 2000 Mar 3 565 -3:00 - ART 2004 Jun 1 566 -4:00 - WART 2004 Jun 20 567 -3:00 Arg AR%sT 2008 Oct 18 568 -3:00 - ART 569# 570# Mendoza (MZ) 571Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31 572 -4:16:48 - CMT 1920 May 573 -4:00 - ART 1930 Dec 574 -4:00 Arg AR%sT 1969 Oct 5 575 -3:00 Arg AR%sT 1990 Mar 4 576 -4:00 - WART 1990 Oct 15 577 -4:00 1:00 WARST 1991 Mar 1 578 -4:00 - WART 1991 Oct 15 579 -4:00 1:00 WARST 1992 Mar 1 580 -4:00 - WART 1992 Oct 18 581 -3:00 Arg AR%sT 1999 Oct 3 582 -4:00 Arg AR%sT 2000 Mar 3 583 -3:00 - ART 2004 May 23 584 -4:00 - WART 2004 Sep 26 585 -3:00 Arg AR%sT 2008 Oct 18 586 -3:00 - ART 587# 588# San Luis (SL) 589 590Rule SanLuis 2008 2009 - Mar Sun>=8 0:00 0 - 591Rule SanLuis 2007 2009 - Oct Sun>=8 0:00 1:00 S 592 593Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31 594 -4:16:48 - CMT 1920 May 595 -4:00 - ART 1930 Dec 596 -4:00 Arg AR%sT 1969 Oct 5 597 -3:00 Arg AR%sT 1990 598 -3:00 1:00 ARST 1990 Mar 14 599 -4:00 - WART 1990 Oct 15 600 -4:00 1:00 WARST 1991 Mar 1 601 -4:00 - WART 1991 Jun 1 602 -3:00 - ART 1999 Oct 3 603 -4:00 1:00 WARST 2000 Mar 3 604 -3:00 - ART 2004 May 31 605 -4:00 - WART 2004 Jul 25 606 -3:00 Arg AR%sT 2008 Jan 21 607 -4:00 SanLuis WAR%sT 608# 609# Santa Cruz (SC) 610Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31 611 -4:16:48 - CMT 1920 May # Cordoba Mean Time 612 -4:00 - ART 1930 Dec 613 -4:00 Arg AR%sT 1969 Oct 5 614 -3:00 Arg AR%sT 1999 Oct 3 615 -4:00 Arg AR%sT 2000 Mar 3 616 -3:00 - ART 2004 Jun 1 617 -4:00 - WART 2004 Jun 20 618 -3:00 Arg AR%sT 2008 Oct 18 619 -3:00 - ART 620# 621# Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF) 622Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31 623 -4:16:48 - CMT 1920 May # Cordoba Mean Time 624 -4:00 - ART 1930 Dec 625 -4:00 Arg AR%sT 1969 Oct 5 626 -3:00 Arg AR%sT 1999 Oct 3 627 -4:00 Arg AR%sT 2000 Mar 3 628 -3:00 - ART 2004 May 30 629 -4:00 - WART 2004 Jun 20 630 -3:00 Arg AR%sT 2008 Oct 18 631 -3:00 - ART 632 633# Aruba 634# Zone NAME GMTOFF RULES FORMAT [UNTIL] 635Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad 636 -4:30 - ANT 1965 # Netherlands Antilles Time 637 -4:00 - AST 638 639# Bolivia 640# Zone NAME GMTOFF RULES FORMAT [UNTIL] 641Zone America/La_Paz -4:32:36 - LMT 1890 642 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT 643 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST 644 -4:00 - BOT # Bolivia Time 645 646# Brazil 647 648# From Paul Eggert (1993-11-18): 649# The mayor of Rio recently attempted to change the time zone rules 650# just in his city, in order to leave more summer time for the tourist trade. 651# The rule change lasted only part of the day; 652# the federal government refused to follow the city's rules, and business 653# was in a chaos, so the mayor backed down that afternoon. 654 655# From IATA SSIM (1996-02): 656# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS), 657# Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ), 658# Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO), 659# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL]. 660# [The last three states are new to this issue of the IATA SSIM.] 661 662# From Gwillim Law (1996-10-07): 663# Geography, history (Tocantins was part of Goias until 1989), and other 664# sources of time zone information lead me to believe that AL, SE, and TO were 665# always in BR1, and so the only change was whether or not they observed DST.... 666# The earliest issue of the SSIM I have is 2/91. Each issue from then until 667# 9/95 says that DST is observed only in the ten states I quoted from 9/95, 668# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2 669# (UTC-4).... The other two time zones given for Brazil are BR3, which is 670# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is 671# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's 672# become part of the state of Pernambuco). The boundary between BR1 and BR2 673# has never been clearly stated. They've simply been called East and West. 674# However, some conclusions can be drawn from another IATA manual: the Airline 675# Coding Directory, which lists close to 400 airports in Brazil. For each 676# airport it gives a time zone which is coded to the SSIM. From that 677# information, I'm led to conclude that the states of Amapa (AP), Ceara (CE), 678# Maranhao (MA), Paraiba (PR), Pernambuco (PE), Piaui (PI), and Rio Grande do 679# Norte (RN), and the eastern part of Para (PA) are all in BR1 without DST. 680 681# From Marcos Tadeu (1998-09-27): 682# <a href="http://pcdsh01.on.br/verao1.html"> 683# Brazilian official page 684# </a> 685 686# From Jesper Norgaard (2000-11-03): 687# [For an official list of which regions in Brazil use which time zones, see:] 688# http://pcdsh01.on.br/Fusbr.htm 689# http://pcdsh01.on.br/Fusbrhv.htm 690 691# From Celso Doria via David Madeo (2002-10-09): 692# The reason for the delay this year has to do with elections in Brazil. 693# 694# Unlike in the United States, elections in Brazil are 100% computerized and 695# the results are known almost immediately. Yesterday, it was the first 696# round of the elections when 115 million Brazilians voted for President, 697# Governor, Senators, Federal Deputies, and State Deputies. Nobody is 698# counting (or re-counting) votes anymore and we know there will be a second 699# round for the Presidency and also for some Governors. The 2nd round will 700# take place on October 27th. 701# 702# The reason why the DST will only begin November 3rd is that the thousands 703# of electoral machines used cannot have their time changed, and since the 704# Constitution says the elections must begin at 8:00 AM and end at 5:00 PM, 705# the Government decided to postpone DST, instead of changing the Constitution 706# (maybe, for the next elections, it will be possible to change the clock)... 707 708# From Rodrigo Severo (2004-10-04): 709# It's just the biannual change made necessary by the much hyped, supposedly 710# modern Brazilian eletronic voting machines which, apparently, can't deal 711# with a time change between the first and the second rounds of the elections. 712 713# From Steffen Thorsen (2007-09-20): 714# Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00: 715# http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975 716 717# From Paul Schulze (2008-06-24): 718# ...by law number 11.662 of April 24, 2008 (published in the "Diario 719# Oficial da Uniao"...) in Brazil there are changes in the timezones, 720# effective today (00:00am at June 24, 2008) as follows: 721# 722# a) The timezone UTC+5 is e[x]tinguished, with all the Acre state and the 723# part of the Amazonas state that had this timezone now being put to the 724# timezone UTC+4 725# b) The whole Para state now is put at timezone UTC+3, instead of just 726# part of it, as was before. 727# 728# This change follows a proposal of senator Tiao Viana of Acre state, that 729# proposed it due to concerns about open television channels displaying 730# programs inappropriate to youths in the states that had the timezone 731# UTC+5 too early in the night. In the occasion, some more corrections 732# were proposed, trying to unify the timezones of any given state. This 733# change modifies timezone rules defined in decree 2.784 of 18 June, 734# 1913. 735 736# From Rodrigo Severo (2008-06-24): 737# Just correcting the URL: 738# <a href="https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008"> 739# https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008 740# </a> 741# 742# As a result of the above Decree I believe the America/Rio_Branco 743# timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall 744# be created to represent the...west side of the Para State. I 745# suggest this new timezone be called Santarem as the most 746# important/populated city in the affected area. 747# 748# This new timezone would be the same as the Rio_Branco timezone up to 749# the 2008/06/24 change which would be to UTC-3 instead of UTC-4. 750 751# From Alex Krivenyshev (2008-06-24): 752# This is a quick reference page for New and Old Brazil Time Zones map. 753# <a href="http://www.worldtimezone.com/brazil-time-new-old.php"> 754# http://www.worldtimezone.com/brazil-time-new-old.php 755# </a> 756# 757# - 4 time zones replaced by 3 time zones-eliminating time zone UTC- 05 758# (state Acre and the part of the Amazonas will be UTC/GMT- 04) - western 759# part of Par state is moving to one timezone UTC- 03 (from UTC -04). 760 761# From Paul Eggert (2002-10-10): 762# The official decrees referenced below are mostly taken from 763# <a href="http://pcdsh01.on.br/DecHV.html"> 764# Decretos sobre o Horario de Verao no Brasil 765# </a>. 766 767# From Steffen Thorsen (2008-08-29): 768# As announced by the government and many newspapers in Brazil late 769# yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and 770# it will end on 2009-02-15 (current rule for Brazil is fine). Based on 771# past years experience with the elections, there was a good chance that 772# the start was postponed to November, but it did not happen this year. 773# 774# It has not yet been posted to http://pcdsh01.on.br/DecHV.html 775# 776# An official page about it: 777# <a href="http://www.mme.gov.br/site/news/detail.do?newsId=16722"> 778# http://www.mme.gov.br/site/news/detail.do?newsId=16722 779# </a> 780# Note that this link does not always work directly, but must be accessed 781# by going to 782# <a href="http://www.mme.gov.br/first"> 783# http://www.mme.gov.br/first 784# </a> 785# 786# One example link that works directly: 787# <a href="http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54"> 788# http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54 789# (Portuguese) 790# </a> 791# 792# We have a written a short article about it as well: 793# <a href="http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html"> 794# http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html 795# </a> 796# 797# From Alexander Krivenyshev (2011-10-04): 798# State Bahia will return to Daylight savings time this year after 8 years off. 799# The announcement was made by Governor Jaques Wagner in an interview to a 800# television station in Salvador. 801 802# In Portuguese: 803# <a href="http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html"> 804# http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html 805# </a> and 806# <a href="http://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html"> 807# http://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html 808# </a> 809 810# From Guilherme Bernardes Rodrigues (2011-10-07): 811# There is news in the media, however there is still no decree about it. 812# I just send a e-mail to Zulmira Brandao at 813# <a href="http://pcdsh01.on.br/">http://pcdsh01.on.br/</a> the 814# official agency about time in Brazil, and she confirmed that the old rule is 815# still in force. 816 817# From Guilherme Bernardes Rodrigues (2011-10-14) 818# It's official, the President signed a decree that includes Bahia in summer 819# time. 820# [ and in a second message (same day): ] 821# I found the decree. 822# 823# DECRETO No- 7.584, DE 13 DE OUTUBRO DE 2011 824# Link : 825# <a href="http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6"> 826# http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6 827# </a> 828 829# From Kelley Cook (2012-10-16): 830# The governor of state of Bahia in Brazil announced on Thursday that 831# due to public pressure, he is reversing the DST policy they implemented 832# last year and will not be going to Summer Time on October 21st.... 833# http://www.correio24horas.com.br/r/artigo/apos-pressoes-wagner-suspende-horario-de-verao-na-bahia 834 835# From Rodrigo Severo (2012-10-16): 836# Tocantins state will have DST. 837# http://noticias.terra.com.br/brasil/noticias/0,,OI6232536-EI306.html 838 839# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 840# Decree <a href="http://pcdsh01.on.br/HV20466.htm">20,466</a> (1931-10-01) 841# Decree <a href="http://pcdsh01.on.br/HV21896.htm">21,896</a> (1932-01-10) 842Rule Brazil 1931 only - Oct 3 11:00 1:00 S 843Rule Brazil 1932 1933 - Apr 1 0:00 0 - 844Rule Brazil 1932 only - Oct 3 0:00 1:00 S 845# Decree <a href="http://pcdsh01.on.br/HV23195.htm">23,195</a> (1933-10-10) 846# revoked DST. 847# Decree <a href="http://pcdsh01.on.br/HV27496.htm">27,496</a> (1949-11-24) 848# Decree <a href="http://pcdsh01.on.br/HV27998.htm">27,998</a> (1950-04-13) 849Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S 850Rule Brazil 1950 only - Apr 16 1:00 0 - 851Rule Brazil 1951 1952 - Apr 1 0:00 0 - 852# Decree <a href="http://pcdsh01.on.br/HV32308.htm">32,308</a> (1953-02-24) 853Rule Brazil 1953 only - Mar 1 0:00 0 - 854# Decree <a href="http://pcdsh01.on.br/HV34724.htm">34,724</a> (1953-11-30) 855# revoked DST. 856# Decree <a href="http://pcdsh01.on.br/HV52700.htm">52,700</a> (1963-10-18) 857# established DST from 1963-10-23 00:00 to 1964-02-29 00:00 858# in SP, RJ, GB, MG, ES, due to the prolongation of the drought. 859# Decree <a href="http://pcdsh01.on.br/HV53071.htm">53,071</a> (1963-12-03) 860# extended the above decree to all of the national territory on 12-09. 861Rule Brazil 1963 only - Dec 9 0:00 1:00 S 862# Decree <a href="http://pcdsh01.on.br/HV53604.htm">53,604</a> (1964-02-25) 863# extended summer time by one day to 1964-03-01 00:00 (start of school). 864Rule Brazil 1964 only - Mar 1 0:00 0 - 865# Decree <a href="http://pcdsh01.on.br/HV55639.htm">55,639</a> (1965-01-27) 866Rule Brazil 1965 only - Jan 31 0:00 1:00 S 867Rule Brazil 1965 only - Mar 31 0:00 0 - 868# Decree <a href="http://pcdsh01.on.br/HV57303.htm">57,303</a> (1965-11-22) 869Rule Brazil 1965 only - Dec 1 0:00 1:00 S 870# Decree <a href="http://pcdsh01.on.br/HV57843.htm">57,843</a> (1966-02-18) 871Rule Brazil 1966 1968 - Mar 1 0:00 0 - 872Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S 873# Decree <a href="http://pcdsh01.on.br/HV63429.htm">63,429</a> (1968-10-15) 874# revoked DST. 875# Decree <a href="http://pcdsh01.on.br/HV91698.htm">91,698</a> (1985-09-27) 876Rule Brazil 1985 only - Nov 2 0:00 1:00 S 877# Decree 92,310 (1986-01-21) 878# Decree 92,463 (1986-03-13) 879Rule Brazil 1986 only - Mar 15 0:00 0 - 880# Decree 93,316 (1986-10-01) 881Rule Brazil 1986 only - Oct 25 0:00 1:00 S 882Rule Brazil 1987 only - Feb 14 0:00 0 - 883# Decree <a href="http://pcdsh01.on.br/HV94922.htm">94,922</a> (1987-09-22) 884Rule Brazil 1987 only - Oct 25 0:00 1:00 S 885Rule Brazil 1988 only - Feb 7 0:00 0 - 886# Decree <a href="http://pcdsh01.on.br/HV96676.htm">96,676</a> (1988-09-12) 887# except for the states of AC, AM, PA, RR, RO, and AP (then a territory) 888Rule Brazil 1988 only - Oct 16 0:00 1:00 S 889Rule Brazil 1989 only - Jan 29 0:00 0 - 890# Decree <a href="http://pcdsh01.on.br/HV98077.htm">98,077</a> (1989-08-21) 891# with the same exceptions 892Rule Brazil 1989 only - Oct 15 0:00 1:00 S 893Rule Brazil 1990 only - Feb 11 0:00 0 - 894# Decree <a href="http://pcdsh01.on.br/HV99530.htm">99,530</a> (1990-09-17) 895# adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF. 896# Decree 99,629 (1990-10-19) adds BA, MT. 897Rule Brazil 1990 only - Oct 21 0:00 1:00 S 898Rule Brazil 1991 only - Feb 17 0:00 0 - 899# <a href="http://pcdsh01.on.br/HV1991.htm">Unnumbered decree</a> (1991-09-25) 900# adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF. 901Rule Brazil 1991 only - Oct 20 0:00 1:00 S 902Rule Brazil 1992 only - Feb 9 0:00 0 - 903# <a href="http://pcdsh01.on.br/HV1992.htm">Unnumbered decree</a> (1992-10-16) 904# adopted by same states. 905Rule Brazil 1992 only - Oct 25 0:00 1:00 S 906Rule Brazil 1993 only - Jan 31 0:00 0 - 907# Decree <a href="http://pcdsh01.on.br/HV942.htm">942</a> (1993-09-28) 908# adopted by same states, plus AM. 909# Decree <a href="http://pcdsh01.on.br/HV1252.htm">1,252</a> (1994-09-22; 910# web page corrected 2004-01-07) adopted by same states, minus AM. 911# Decree <a href="http://pcdsh01.on.br/HV1636.htm">1,636</a> (1995-09-14) 912# adopted by same states, plus MT and TO. 913# Decree <a href="http://pcdsh01.on.br/HV1674.htm">1,674</a> (1995-10-13) 914# adds AL, SE. 915Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S 916Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 - 917Rule Brazil 1996 only - Feb 11 0:00 0 - 918# Decree <a href="http://pcdsh01.on.br/HV2000.htm">2,000</a> (1996-09-04) 919# adopted by same states, minus AL, SE. 920Rule Brazil 1996 only - Oct 6 0:00 1:00 S 921Rule Brazil 1997 only - Feb 16 0:00 0 - 922# From Daniel C. Sobral (1998-02-12): 923# In 1997, the DS began on October 6. The stated reason was that 924# because international television networks ignored Brazil's policy on DS, 925# they bought the wrong times on satellite for coverage of Pope's visit. 926# This year, the ending date of DS was postponed to March 1 927# to help dealing with the shortages of electric power. 928# 929# Decree 2,317 (1997-09-04), adopted by same states. 930Rule Brazil 1997 only - Oct 6 0:00 1:00 S 931# Decree <a href="http://pcdsh01.on.br/figuras/HV2495.JPG">2,495</a> 932# (1998-02-10) 933Rule Brazil 1998 only - Mar 1 0:00 0 - 934# Decree <a href="http://pcdsh01.on.br/figuras/Hv98.jpg">2,780</a> (1998-09-11) 935# adopted by the same states as before. 936Rule Brazil 1998 only - Oct 11 0:00 1:00 S 937Rule Brazil 1999 only - Feb 21 0:00 0 - 938# Decree <a href="http://pcdsh01.on.br/figuras/HV3150.gif">3,150</a> 939# (1999-08-23) adopted by same states. 940# Decree <a href="http://pcdsh01.on.br/DecHV99.gif">3,188</a> (1999-09-30) 941# adds SE, AL, PB, PE, RN, CE, PI, MA and RR. 942Rule Brazil 1999 only - Oct 3 0:00 1:00 S 943Rule Brazil 2000 only - Feb 27 0:00 0 - 944# Decree <a href="http://pcdsh01.on.br/DEC3592.htm">3,592</a> (2000-09-06) 945# adopted by the same states as before. 946# Decree <a href="http://pcdsh01.on.br/Dec3630.jpg">3,630</a> (2000-10-13) 947# repeals DST in PE and RR, effective 2000-10-15 00:00. 948# Decree <a href="http://pcdsh01.on.br/Dec3632.jpg">3,632</a> (2000-10-17) 949# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00. 950# Decree <a href="http://pcdsh01.on.br/figuras/HV3916.gif">3,916</a> 951# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE. 952Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S 953Rule Brazil 2001 2006 - Feb Sun>=15 0:00 0 - 954# Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE. 955# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm">4,399</a> 956Rule Brazil 2002 only - Nov 3 0:00 1:00 S 957# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO. 958# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm">4,844</a> 959Rule Brazil 2003 only - Oct 19 0:00 1:00 S 960# Decree 5,223 (2004-10-01) reestablishes DST in MT. 961# <a href="http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm">5,223</a> 962Rule Brazil 2004 only - Nov 2 0:00 1:00 S 963# Decree <a href="http://pcdsh01.on.br/DecHV5539.gif">5,539</a> (2005-09-19), 964# adopted by the same states as before. 965Rule Brazil 2005 only - Oct 16 0:00 1:00 S 966# Decree <a href="http://pcdsh01.on.br/DecHV5920.gif">5,920</a> (2006-10-03), 967# adopted by the same states as before. 968Rule Brazil 2006 only - Nov 5 0:00 1:00 S 969Rule Brazil 2007 only - Feb 25 0:00 0 - 970# Decree <a href="http://pcdsh01.on.br/DecHV6212.gif">6,212</a> (2007-09-26), 971# adopted by the same states as before. 972Rule Brazil 2007 only - Oct Sun>=8 0:00 1:00 S 973# From Frederico A. C. Neves (2008-09-10): 974# According to this decree 975# <a href="http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm"> 976# http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm 977# </a> 978# [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the 979# 3rd Feb Sunday. There is an exception on the return date when this is 980# the Carnival Sunday then the return date will be the next Sunday... 981Rule Brazil 2008 max - Oct Sun>=15 0:00 1:00 S 982Rule Brazil 2008 2011 - Feb Sun>=15 0:00 0 - 983Rule Brazil 2012 only - Feb Sun>=22 0:00 0 - 984Rule Brazil 2013 2014 - Feb Sun>=15 0:00 0 - 985Rule Brazil 2015 only - Feb Sun>=22 0:00 0 - 986Rule Brazil 2016 2022 - Feb Sun>=15 0:00 0 - 987Rule Brazil 2023 only - Feb Sun>=22 0:00 0 - 988Rule Brazil 2024 2025 - Feb Sun>=15 0:00 0 - 989Rule Brazil 2026 only - Feb Sun>=22 0:00 0 - 990Rule Brazil 2027 2033 - Feb Sun>=15 0:00 0 - 991Rule Brazil 2034 only - Feb Sun>=22 0:00 0 - 992Rule Brazil 2035 2036 - Feb Sun>=15 0:00 0 - 993Rule Brazil 2037 only - Feb Sun>=22 0:00 0 - 994# From Arthur David Olson (2008-09-29): 995# The next is wrong in some years but is better than nothing. 996Rule Brazil 2038 max - Feb Sun>=15 0:00 0 - 997 998# The latest ruleset listed above says that the following states observe DST: 999# DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP. 1000 1001# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1002# 1003# Fernando de Noronha (administratively part of PE) 1004Zone America/Noronha -2:09:40 - LMT 1914 1005 -2:00 Brazil FN%sT 1990 Sep 17 1006 -2:00 - FNT 1999 Sep 30 1007 -2:00 Brazil FN%sT 2000 Oct 15 1008 -2:00 - FNT 2001 Sep 13 1009 -2:00 Brazil FN%sT 2002 Oct 1 1010 -2:00 - FNT 1011# Other Atlantic islands have no permanent settlement. 1012# These include Trindade and Martin Vaz (administratively part of ES), 1013# Atol das Rocas (RN), and Penedos de Sao Pedro e Sao Paulo (PE). 1014# Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01; 1015# it also included the Penedos. 1016# 1017# Amapa (AP), east Para (PA) 1018# East Para includes Belem, Maraba, Serra Norte, and Sao Felix do Xingu. 1019# The division between east and west Para is the river Xingu. 1020# In the north a very small part from the river Javary (now Jari I guess, 1021# the border with Amapa) to the Amazon, then to the Xingu. 1022Zone America/Belem -3:13:56 - LMT 1914 1023 -3:00 Brazil BR%sT 1988 Sep 12 1024 -3:00 - BRT 1025# 1026# west Para (PA) 1027# West Para includes Altamira, Oribidos, Prainha, Oriximina, and Santarem. 1028Zone America/Santarem -3:38:48 - LMT 1914 1029 -4:00 Brazil AM%sT 1988 Sep 12 1030 -4:00 - AMT 2008 Jun 24 00:00 1031 -3:00 - BRT 1032# 1033# Maranhao (MA), Piaui (PI), Ceara (CE), Rio Grande do Norte (RN), 1034# Paraiba (PB) 1035Zone America/Fortaleza -2:34:00 - LMT 1914 1036 -3:00 Brazil BR%sT 1990 Sep 17 1037 -3:00 - BRT 1999 Sep 30 1038 -3:00 Brazil BR%sT 2000 Oct 22 1039 -3:00 - BRT 2001 Sep 13 1040 -3:00 Brazil BR%sT 2002 Oct 1 1041 -3:00 - BRT 1042# 1043# Pernambuco (PE) (except Atlantic islands) 1044Zone America/Recife -2:19:36 - LMT 1914 1045 -3:00 Brazil BR%sT 1990 Sep 17 1046 -3:00 - BRT 1999 Sep 30 1047 -3:00 Brazil BR%sT 2000 Oct 15 1048 -3:00 - BRT 2001 Sep 13 1049 -3:00 Brazil BR%sT 2002 Oct 1 1050 -3:00 - BRT 1051# 1052# Tocantins (TO) 1053Zone America/Araguaina -3:12:48 - LMT 1914 1054 -3:00 Brazil BR%sT 1990 Sep 17 1055 -3:00 - BRT 1995 Sep 14 1056 -3:00 Brazil BR%sT 2003 Sep 24 1057 -3:00 - BRT 2012 Oct 21 1058 -3:00 Brazil BR%sT 1059# 1060# Alagoas (AL), Sergipe (SE) 1061Zone America/Maceio -2:22:52 - LMT 1914 1062 -3:00 Brazil BR%sT 1990 Sep 17 1063 -3:00 - BRT 1995 Oct 13 1064 -3:00 Brazil BR%sT 1996 Sep 4 1065 -3:00 - BRT 1999 Sep 30 1066 -3:00 Brazil BR%sT 2000 Oct 22 1067 -3:00 - BRT 2001 Sep 13 1068 -3:00 Brazil BR%sT 2002 Oct 1 1069 -3:00 - BRT 1070# 1071# Bahia (BA) 1072# There are too many Salvadors elsewhere, so use America/Bahia instead 1073# of America/Salvador. 1074Zone America/Bahia -2:34:04 - LMT 1914 1075 -3:00 Brazil BR%sT 2003 Sep 24 1076 -3:00 - BRT 2011 Oct 16 1077 -3:00 Brazil BR%sT 2012 Oct 21 1078 -3:00 - BRT 1079# 1080# Goias (GO), Distrito Federal (DF), Minas Gerais (MG), 1081# Espirito Santo (ES), Rio de Janeiro (RJ), Sao Paulo (SP), Parana (PR), 1082# Santa Catarina (SC), Rio Grande do Sul (RS) 1083Zone America/Sao_Paulo -3:06:28 - LMT 1914 1084 -3:00 Brazil BR%sT 1963 Oct 23 00:00 1085 -3:00 1:00 BRST 1964 1086 -3:00 Brazil BR%sT 1087# 1088# Mato Grosso do Sul (MS) 1089Zone America/Campo_Grande -3:38:28 - LMT 1914 1090 -4:00 Brazil AM%sT 1091# 1092# Mato Grosso (MT) 1093Zone America/Cuiaba -3:44:20 - LMT 1914 1094 -4:00 Brazil AM%sT 2003 Sep 24 1095 -4:00 - AMT 2004 Oct 1 1096 -4:00 Brazil AM%sT 1097# 1098# Rondonia (RO) 1099Zone America/Porto_Velho -4:15:36 - LMT 1914 1100 -4:00 Brazil AM%sT 1988 Sep 12 1101 -4:00 - AMT 1102# 1103# Roraima (RR) 1104Zone America/Boa_Vista -4:02:40 - LMT 1914 1105 -4:00 Brazil AM%sT 1988 Sep 12 1106 -4:00 - AMT 1999 Sep 30 1107 -4:00 Brazil AM%sT 2000 Oct 15 1108 -4:00 - AMT 1109# 1110# east Amazonas (AM): Boca do Acre, Jutai, Manaus, Floriano Peixoto 1111# The great circle line from Tabatinga to Porto Acre divides 1112# east from west Amazonas. 1113Zone America/Manaus -4:00:04 - LMT 1914 1114 -4:00 Brazil AM%sT 1988 Sep 12 1115 -4:00 - AMT 1993 Sep 28 1116 -4:00 Brazil AM%sT 1994 Sep 22 1117 -4:00 - AMT 1118# 1119# west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant, 1120# Eirunepe, Envira, Ipixuna 1121Zone America/Eirunepe -4:39:28 - LMT 1914 1122 -5:00 Brazil AC%sT 1988 Sep 12 1123 -5:00 - ACT 1993 Sep 28 1124 -5:00 Brazil AC%sT 1994 Sep 22 1125 -5:00 - ACT 2008 Jun 24 00:00 1126 -4:00 - AMT 1127# 1128# Acre (AC) 1129Zone America/Rio_Branco -4:31:12 - LMT 1914 1130 -5:00 Brazil AC%sT 1988 Sep 12 1131 -5:00 - ACT 2008 Jun 24 00:00 1132 -4:00 - AMT 1133 1134# Chile 1135 1136# From Eduardo Krell (1995-10-19): 1137# The law says to switch to DST at midnight [24:00] on the second SATURDAY 1138# of October.... The law is the same for March and October. 1139# (1998-09-29): 1140# Because of the drought this year, the government decided to go into 1141# DST earlier (saturday 9/26 at 24:00). This is a one-time change only ... 1142# (unless there's another dry season next year, I guess). 1143 1144# From Julio I. Pacheco Troncoso (1999-03-18): 1145# Because of the same drought, the government decided to end DST later, 1146# on April 3, (one-time change). 1147 1148# From Oscar van Vlijmen (2006-10-08): 1149# http://www.horaoficial.cl/cambio.htm 1150 1151# From Jesper Norgaard Welen (2006-10-08): 1152# I think that there are some obvious mistakes in the suggested link 1153# from Oscar van Vlijmen,... for instance entry 66 says that GMT-4 1154# ended 1990-09-12 while entry 67 only begins GMT-3 at 1990-09-15 1155# (they should have been 1990-09-15 and 1990-09-16 respectively), but 1156# anyhow it clears up some doubts too. 1157 1158# From Paul Eggert (2006-12-27): 1159# The following data for Chile and America/Santiago are from 1160# <http://www.horaoficial.cl/horaof.htm> (2006-09-20), transcribed by 1161# Jesper Norgaard Welen. The data for Pacific/Easter are from Shanks 1162# & Pottenger, except with DST transitions after 1932 cloned from 1163# America/Santiago. The pre-1980 Pacific/Easter data are dubious, 1164# but we have no other source. 1165 1166# From German Poo-Caaman~o (2008-03-03): 1167# Due to drought, Chile extends Daylight Time in three weeks. This 1168# is one-time change (Saturday 3/29 at 24:00 for America/Santiago 1169# and Saturday 3/29 at 22:00 for Pacific/Easter) 1170# The Supreme Decree is located at 1171# <a href="http://www.shoa.cl/servicios/supremo316.pdf"> 1172# http://www.shoa.cl/servicios/supremo316.pdf 1173# </a> 1174# and the instructions for 2008 are located in: 1175# <a href="http://www.horaoficial.cl/cambio.htm"> 1176# http://www.horaoficial.cl/cambio.htm 1177# </a>. 1178 1179# From Jose Miguel Garrido (2008-03-05): 1180# ... 1181# You could see the announces of the change on 1182# <a href="http://www.shoa.cl/noticias/2008/04hora/hora.htm"> 1183# http://www.shoa.cl/noticias/2008/04hora/hora.htm 1184# </a>. 1185 1186# From Angel Chiang (2010-03-04): 1187# Subject: DST in Chile exceptionally extended to 3 April due to earthquake 1188# <a href="http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098"> 1189# http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098 1190# </a> 1191# (in Spanish, last paragraph). 1192# 1193# This is breaking news. There should be more information available later. 1194 1195# From Arthur Daivd Olson (2010-03-06): 1196# Angel Chiang's message confirmed by Julio Pacheco; Julio provided a patch. 1197 1198# From Glenn Eychaner (2011-03-02): [geychaner@mac.com] 1199# It appears that the Chilean government has decided to postpone the 1200# change from summer time to winter time again, by three weeks to April 1201# 2nd: 1202# <a href="http://www.emol.com/noticias/nacional/detalle/detallenoticias.asp?idnoticia=467651"> 1203# http://www.emol.com/noticias/nacional/detalle/detallenoticias.asp?idnoticia=467651 1204# </a> 1205# 1206# This is not yet reflected in the official "cambio de hora" site, but 1207# probably will be soon: 1208# <a href="http://www.horaoficial.cl/cambio.htm"> 1209# http://www.horaoficial.cl/cambio.htm 1210# </a> 1211 1212# From Arthur David Olson (2011-03-02): 1213# The emol.com article mentions a water shortage as the cause of the 1214# postponement, which may mean that it's not a permanent change. 1215 1216# From Glenn Eychaner (2011-03-28): 1217# The article: 1218# <a href="http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E}"> 1219# http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E} 1220# </a> 1221# 1222# In English: 1223# Chile's clocks will go back an hour this year on the 7th of May instead 1224# of this Saturday. They will go forward again the 3rd Saturday in 1225# August, not in October as they have since 1968. This is a pilot plan 1226# which will be reevaluated in 2012. 1227 1228# From Mauricio Parada (2012-02-22), translated by Glenn Eychaner (2012-02-23): 1229# As stated in the website of the Chilean Energy Ministry 1230# http://www.minenergia.cl/ministerio/noticias/generales/gobierno-anuncia-fechas-de-cambio-de.html 1231# The Chilean Government has decided to postpone the entrance into winter time 1232# (to leave DST) from March 11 2012 to April 28th 2012. The decision has not 1233# been yet formalized but it will within the next days. 1234# Quote from the website communication: 1235# 1236# 6. For the year 2012, the dates of entry into winter time will be as follows: 1237# a. Saturday April 28, 2012, clocks should go back 60 minutes; that is, at 1238# 23:59:59, instead of passing to 0:00, the time should be adjusted to be 23:00 1239# of the same day. 1240# b. Saturday, September 1, 2012, clocks should go forward 60 minutes; that is, 1241# at 23:59:59, instead of passing to 0:00, the time should be adjusted to be 1242# 01:00 on September 2. 1243 1244# From Steffen Thorsen (2013-02-15): 1245# According to several news sources, Chile has extended DST this year, 1246# they will end DST later and start DST earlier than planned. They 1247# hope to save energy. The new end date is 2013-04-28 00:00 and new 1248# start date is 2013-09-08 00:00.... 1249# http://www.gob.cl/informa/2013/02/15/gobierno-anuncia-fechas-de-cambio-de-hora-para-el-ano-2013.htm 1250 1251# NOTE: ChileAQ rules for Antarctic bases are stored separately in the 1252# 'antarctica' file. 1253 1254# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1255Rule Chile 1927 1932 - Sep 1 0:00 1:00 S 1256Rule Chile 1928 1932 - Apr 1 0:00 0 - 1257Rule Chile 1942 only - Jun 1 4:00u 0 - 1258Rule Chile 1942 only - Aug 1 5:00u 1:00 S 1259Rule Chile 1946 only - Jul 15 4:00u 1:00 S 1260Rule Chile 1946 only - Sep 1 3:00u 0:00 - 1261Rule Chile 1947 only - Apr 1 4:00u 0 - 1262Rule Chile 1968 only - Nov 3 4:00u 1:00 S 1263Rule Chile 1969 only - Mar 30 3:00u 0 - 1264Rule Chile 1969 only - Nov 23 4:00u 1:00 S 1265Rule Chile 1970 only - Mar 29 3:00u 0 - 1266Rule Chile 1971 only - Mar 14 3:00u 0 - 1267Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S 1268Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 - 1269Rule Chile 1973 only - Sep 30 4:00u 1:00 S 1270Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S 1271Rule Chile 1987 only - Apr 12 3:00u 0 - 1272Rule Chile 1988 1989 - Mar Sun>=9 3:00u 0 - 1273Rule Chile 1988 only - Oct Sun>=1 4:00u 1:00 S 1274Rule Chile 1989 only - Oct Sun>=9 4:00u 1:00 S 1275Rule Chile 1990 only - Mar 18 3:00u 0 - 1276Rule Chile 1990 only - Sep 16 4:00u 1:00 S 1277Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 - 1278Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S 1279Rule Chile 1997 only - Mar 30 3:00u 0 - 1280Rule Chile 1998 only - Mar Sun>=9 3:00u 0 - 1281Rule Chile 1998 only - Sep 27 4:00u 1:00 S 1282Rule Chile 1999 only - Apr 4 3:00u 0 - 1283Rule Chile 1999 2010 - Oct Sun>=9 4:00u 1:00 S 1284Rule Chile 2000 2007 - Mar Sun>=9 3:00u 0 - 1285# N.B.: the end of March 29 in Chile is March 30 in Universal time, 1286# which is used below in specifying the transition. 1287Rule Chile 2008 only - Mar 30 3:00u 0 - 1288Rule Chile 2009 only - Mar Sun>=9 3:00u 0 - 1289Rule Chile 2010 only - Apr Sun>=1 3:00u 0 - 1290Rule Chile 2011 only - May Sun>=2 3:00u 0 - 1291Rule Chile 2011 only - Aug Sun>=16 4:00u 1:00 S 1292Rule Chile 2012 max - Apr Sun>=23 3:00u 0 - 1293Rule Chile 2012 max - Sep Sun>=2 4:00u 1:00 S 1294# IATA SSIM anomalies: (1992-02) says 1992-03-14; 1295# (1996-09) says 1998-03-08. Ignore these. 1296# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1297Zone America/Santiago -4:42:46 - LMT 1890 1298 -4:42:46 - SMT 1910 # Santiago Mean Time 1299 -5:00 - CLT 1916 Jul 1 # Chile Time 1300 -4:42:46 - SMT 1918 Sep 1 # Santiago Mean Time 1301 -4:00 - CLT 1919 Jul 1 # Chile Time 1302 -4:42:46 - SMT 1927 Sep 1 # Santiago Mean Time 1303 -5:00 Chile CL%sT 1947 May 22 # Chile Time 1304 -4:00 Chile CL%sT 1305Zone Pacific/Easter -7:17:44 - LMT 1890 1306 -7:17:28 - EMT 1932 Sep # Easter Mean Time 1307 -7:00 Chile EAS%sT 1982 Mar 13 21:00 # Easter I Time 1308 -6:00 Chile EAS%sT 1309# 1310# Sala y Gomez Island is like Pacific/Easter. 1311# Other Chilean locations, including Juan Fernandez Is, San Ambrosio, 1312# San Felix, and Antarctic bases, are like America/Santiago. 1313 1314# Colombia 1315 1316# Milne gives 4:56:16.4 for Bogota time in 1899; round to nearest. He writes, 1317# "A variation of fifteen minutes in the public clocks of Bogota is not rare." 1318 1319# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1320Rule CO 1992 only - May 3 0:00 1:00 S 1321Rule CO 1993 only - Apr 4 0:00 0 - 1322# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1323Zone America/Bogota -4:56:16 - LMT 1884 Mar 13 1324 -4:56:16 - BMT 1914 Nov 23 # Bogota Mean Time 1325 -5:00 CO CO%sT # Colombia Time 1326# Malpelo, Providencia, San Andres 1327# no information; probably like America/Bogota 1328 1329# Curacao 1330 1331# Milne gives 4:35:46.9 for Curacao mean time; round to nearest. 1332# 1333# From Paul Eggert (2006-03-22): 1334# Shanks & Pottenger say that The Bottom and Philipsburg have been at 1335# -4:00 since standard time was introduced on 1912-03-02; and that 1336# Kralendijk and Rincon used Kralendijk Mean Time (-4:33:08) from 1337# 1912-02-02 to 1965-01-01. The former is dubious, since S&P also say 1338# Saba Island has been like Curacao. 1339# This all predates our 1970 cutoff, though. 1340# 1341# By July 2007 Curacao and St Maarten are planned to become 1342# associated states within the Netherlands, much like Aruba; 1343# Bonaire, Saba and St Eustatius would become directly part of the 1344# Netherlands as Kingdom Islands. This won't affect their time zones 1345# though, as far as we know. 1346# 1347# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1348Zone America/Curacao -4:35:47 - LMT 1912 Feb 12 # Willemstad 1349 -4:30 - ANT 1965 # Netherlands Antilles Time 1350 -4:00 - AST 1351 1352# From Arthur David Olson (2011-06-15): 1353# At least for now, use links for places with new iso3166 codes. 1354# The name "Lower Prince's Quarter" is both longer than fourteen charaters 1355# and contains an apostrophe; use "Lower_Princes" below. 1356 1357Link America/Curacao America/Lower_Princes # Sint Maarten 1358Link America/Curacao America/Kralendijk # Bonaire, Sint Estatius and Saba 1359 1360# Ecuador 1361# 1362# Milne says the Sentral and South American Telegraph Company used -5:24:15. 1363# 1364# From Paul Eggert (2007-03-04): 1365# Apparently Ecuador had a failed experiment with DST in 1992. 1366# <http://midena.gov.ec/content/view/1261/208/> (2007-02-27) and 1367# <http://www.hoy.com.ec/NoticiaNue.asp?row_id=249856> (2006-11-06) both 1368# talk about "hora Sixto". Leave this alone for now, as we have no data. 1369# 1370# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1371Zone America/Guayaquil -5:19:20 - LMT 1890 1372 -5:14:00 - QMT 1931 # Quito Mean Time 1373 -5:00 - ECT # Ecuador Time 1374Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno 1375 -5:00 - ECT 1986 1376 -6:00 - GALT # Galapagos Time 1377 1378# Falklands 1379 1380# From Paul Eggert (2006-03-22): 1381# Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except 1382# the IATA gives 1996-09-08. Go with Shanks & Pottenger. 1383 1384# From Falkland Islands Government Office, London (2001-01-22) 1385# via Jesper Norgaard: 1386# ... the clocks revert back to Local Mean Time at 2 am on Sunday 15 1387# April 2001 and advance one hour to summer time at 2 am on Sunday 2 1388# September. It is anticipated that the clocks will revert back at 2 1389# am on Sunday 21 April 2002 and advance to summer time at 2 am on 1390# Sunday 1 September. 1391 1392# From Rives McDow (2001-02-13): 1393# 1394# I have communicated several times with people there, and the last 1395# time I had communications that was helpful was in 1998. Here is 1396# what was said then: 1397# 1398# "The general rule was that Stanley used daylight saving and the Camp 1399# did not. However for various reasons many people in the Camp have 1400# started to use daylight saving (known locally as 'Stanley Time') 1401# There is no rule as to who uses daylight saving - it is a matter of 1402# personal choice and so it is impossible to draw a map showing who 1403# uses it and who does not. Any list would be out of date as soon as 1404# it was produced. This year daylight saving ended on April 18/19th 1405# and started again on September 12/13th. I do not know what the rule 1406# is, but can find out if you like. We do not change at the same time 1407# as UK or Chile." 1408# 1409# I did have in my notes that the rule was "Second Saturday in Sep at 1410# 0:00 until third Saturday in Apr at 0:00". I think that this does 1411# not agree in some cases with Shanks; is this true? 1412# 1413# Also, there is no mention in the list that some areas in the 1414# Falklands do not use DST. I have found in my communications there 1415# that these areas are on the western half of East Falkland and all of 1416# West Falkland. Stanley is the only place that consistently observes 1417# DST. Again, as in other places in the world, the farmers don't like 1418# it. West Falkland is almost entirely sheep farmers. 1419# 1420# I know one lady there that keeps a list of which farm keeps DST and 1421# which doesn't each year. She runs a shop in Stanley, and says that 1422# the list changes each year. She uses it to communicate to her 1423# customers, catching them when they are home for lunch or dinner. 1424 1425# From Paul Eggert (2001-03-05): 1426# For now, we'll just record the time in Stanley, since we have no 1427# better info. 1428 1429# From Steffen Thorsen (2011-04-01): 1430# The Falkland Islands will not turn back clocks this winter, but stay on 1431# daylight saving time. 1432# 1433# One source: 1434# <a href="http://www.falklandnews.com/public/story.cfm?get=5914&source=3"> 1435# http://www.falklandnews.com/public/story.cfm?get=5914&source=3 1436# </a> 1437# 1438# We have gotten this confirmed by a clerk of the legislative assembly: 1439# Normally the clocks revert to Local Mean Time (UTC/GMT -4 hours) on the 1440# third Sunday of April at 0200hrs and advance to Summer Time (UTC/GMT -3 1441# hours) on the first Sunday of September at 0200hrs. 1442# 1443# IMPORTANT NOTE: During 2011, on a trial basis, the Falkland Islands 1444# will not revert to local mean time, but clocks will remain on Summer 1445# time (UTC/GMT - 3 hours) throughout the whole of 2011. Any long term 1446# change to local time following the trial period will be notified. 1447# 1448# From Andrew Newman (2012-02-24) 1449# A letter from Justin McPhee, Chief Executive, 1450# Cable & Wireless Falkland Islands (dated 2012-02-22) 1451# states... 1452# The current Atlantic/Stanley entry under South America expects the 1453# clocks to go back to standard Falklands Time (FKT) on the 15th April. 1454# The database entry states that in 2011 Stanley was staying on fixed 1455# summer time on a trial basis only. FIG need to contact IANA and/or 1456# the maintainers of the database to inform them we're adopting 1457# the same policy this year and suggest recommendations for future years. 1458# 1459# For now we will assume permanent summer time for the Falklands 1460# until advised differently (to apply for 2012 and beyond, after the 2011 1461# experiment was apparently successful.) 1462# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1463Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S 1464Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 - 1465Rule Falk 1939 only - Oct 1 0:00 1:00 S 1466Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S 1467Rule Falk 1943 only - Jan 1 0:00 0 - 1468Rule Falk 1983 only - Sep lastSun 0:00 1:00 S 1469Rule Falk 1984 1985 - Apr lastSun 0:00 0 - 1470Rule Falk 1984 only - Sep 16 0:00 1:00 S 1471Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S 1472Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 - 1473Rule Falk 2001 2010 - Apr Sun>=15 2:00 0 - 1474Rule Falk 2001 2010 - Sep Sun>=1 2:00 1:00 S 1475# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1476Zone Atlantic/Stanley -3:51:24 - LMT 1890 1477 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time 1478 -4:00 Falk FK%sT 1983 May # Falkland Is Time 1479 -3:00 Falk FK%sT 1985 Sep 15 1480 -4:00 Falk FK%sT 2010 Sep 5 02:00 1481 -3:00 - FKST 1482 1483# French Guiana 1484# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1485Zone America/Cayenne -3:29:20 - LMT 1911 Jul 1486 -4:00 - GFT 1967 Oct # French Guiana Time 1487 -3:00 - GFT 1488 1489# Guyana 1490# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1491Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown 1492 -3:45 - GBGT 1966 May 26 # Br Guiana Time 1493 -3:45 - GYT 1975 Jul 31 # Guyana Time 1494 -3:00 - GYT 1991 1495# IATA SSIM (1996-06) says -4:00. Assume a 1991 switch. 1496 -4:00 - GYT 1497 1498# Paraguay 1499# From Paul Eggert (2006-03-22): 1500# Shanks & Pottenger say that spring transitions are from 01:00 -> 02:00, 1501# and autumn transitions are from 00:00 -> 23:00. Go with pre-1999 1502# editions of Shanks, and with the IATA, who say transitions occur at 00:00. 1503# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1504Rule Para 1975 1988 - Oct 1 0:00 1:00 S 1505Rule Para 1975 1978 - Mar 1 0:00 0 - 1506Rule Para 1979 1991 - Apr 1 0:00 0 - 1507Rule Para 1989 only - Oct 22 0:00 1:00 S 1508Rule Para 1990 only - Oct 1 0:00 1:00 S 1509Rule Para 1991 only - Oct 6 0:00 1:00 S 1510Rule Para 1992 only - Mar 1 0:00 0 - 1511Rule Para 1992 only - Oct 5 0:00 1:00 S 1512Rule Para 1993 only - Mar 31 0:00 0 - 1513Rule Para 1993 1995 - Oct 1 0:00 1:00 S 1514Rule Para 1994 1995 - Feb lastSun 0:00 0 - 1515Rule Para 1996 only - Mar 1 0:00 0 - 1516# IATA SSIM (2000-02) says 1999-10-10; ignore this for now. 1517# From Steffen Thorsen (2000-10-02): 1518# I have three independent reports that Paraguay changed to DST this Sunday 1519# (10-01). 1520# 1521# Translated by Gwillim Law (2001-02-27) from 1522# <a href="http://www.diarionoticias.com.py/011000/nacional/naciona1.htm"> 1523# Noticias, a daily paper in Asuncion, Paraguay (2000-10-01) 1524# </a>: 1525# Starting at 0:00 today, the clock will be set forward 60 minutes, in 1526# fulfillment of Decree No. 7,273 of the Executive Power.... The time change 1527# system has been operating for several years. Formerly there was a separate 1528# decree each year; the new law has the same effect, but permanently. Every 1529# year, the time will change on the first Sunday of October; likewise, the 1530# clock will be set back on the first Sunday of March. 1531# 1532Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S 1533# IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger. 1534Rule Para 1997 only - Feb lastSun 0:00 0 - 1535# Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but 1536# (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27). 1537Rule Para 1998 2001 - Mar Sun>=1 0:00 0 - 1538# From Rives McDow (2002-02-28): 1539# A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the 1540# dst method to be from the first Sunday in September to the first Sunday in 1541# April. 1542Rule Para 2002 2004 - Apr Sun>=1 0:00 0 - 1543Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S 1544# 1545# From Jesper Norgaard Welen (2005-01-02): 1546# There are several sources that claim that Paraguay made 1547# a timezone rule change in autumn 2004. 1548# From Steffen Thorsen (2005-01-05): 1549# Decree 1,867 (2004-03-05) 1550# From Carlos Raul Perasso via Jesper Norgaard Welen (2006-10-13) 1551# <http://www.presidencia.gov.py/decretos/D1867.pdf> 1552Rule Para 2004 2009 - Oct Sun>=15 0:00 1:00 S 1553Rule Para 2005 2009 - Mar Sun>=8 0:00 0 - 1554# From Carlos Raul Perasso (2010-02-18): 1555# By decree number 3958 issued yesterday ( 1556# <a href="http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf"> 1557# http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf 1558# </a> 1559# ) 1560# Paraguay changes its DST schedule, postponing the March rule to April and 1561# modifying the October date. The decree reads: 1562# ... 1563# Art. 1. It is hereby established that from the second Sunday of the month of 1564# April of this year (2010), the official time is to be set back 60 minutes, 1565# and that on the first Sunday of the month of October, it is to be set 1566# forward 60 minutes, in all the territory of the Paraguayan Republic. 1567# ... 1568Rule Para 2010 max - Oct Sun>=1 0:00 1:00 S 1569Rule Para 2010 2012 - Apr Sun>=8 0:00 0 - 1570# 1571# From Steffen Thorsen (2013-03-07): 1572# Paraguay will end DST on 2013-03-24 00:00.... 1573# http://www.ande.gov.py/interna.php?id=1075 1574# 1575# From Carlos Raul Perasso (2013-03-15): 1576# The change in Paraguay is now final. Decree number 10780 1577# http://www.presidencia.gov.py/uploads/pdf/presidencia-3b86ff4b691c79d4f5927ca964922ec74772ce857c02ca054a52a37b49afc7fb.pdf 1578Rule Para 2013 max - Mar Sun>=22 0:00 0 - 1579 1580# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1581Zone America/Asuncion -3:50:40 - LMT 1890 1582 -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time 1583 -4:00 - PYT 1972 Oct # Paraguay Time 1584 -3:00 - PYT 1974 Apr 1585 -4:00 Para PY%sT 1586 1587# Peru 1588# 1589# <a href="news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net"> 1590# From Evelyn C. Leeper via Mark Brader (2003-10-26):</a> 1591# When we were in Peru in 1985-1986, they apparently switched over 1592# sometime between December 29 and January 3 while we were on the Amazon. 1593# 1594# From Paul Eggert (2006-03-22): 1595# Shanks & Pottenger don't have this transition. Assume 1986 was like 1987. 1596 1597# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1598Rule Peru 1938 only - Jan 1 0:00 1:00 S 1599Rule Peru 1938 only - Apr 1 0:00 0 - 1600Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S 1601Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 - 1602Rule Peru 1986 1987 - Jan 1 0:00 1:00 S 1603Rule Peru 1986 1987 - Apr 1 0:00 0 - 1604Rule Peru 1990 only - Jan 1 0:00 1:00 S 1605Rule Peru 1990 only - Apr 1 0:00 0 - 1606# IATA is ambiguous for 1993/1995; go with Shanks & Pottenger. 1607Rule Peru 1994 only - Jan 1 0:00 1:00 S 1608Rule Peru 1994 only - Apr 1 0:00 0 - 1609# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1610Zone America/Lima -5:08:12 - LMT 1890 1611 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time? 1612 -5:00 Peru PE%sT # Peru Time 1613 1614# South Georgia 1615# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1616Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken 1617 -2:00 - GST # South Georgia Time 1618 1619# South Sandwich Is 1620# uninhabited; scientific personnel have wintered 1621 1622# Suriname 1623# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1624Zone America/Paramaribo -3:40:40 - LMT 1911 1625 -3:40:52 - PMT 1935 # Paramaribo Mean Time 1626 -3:40:36 - PMT 1945 Oct # The capital moved? 1627 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time 1628 -3:30 - SRT 1984 Oct # Suriname Time 1629 -3:00 - SRT 1630 1631# Trinidad and Tobago 1632# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1633Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2 1634 -4:00 - AST 1635 1636# Uruguay 1637# From Paul Eggert (1993-11-18): 1638# Uruguay wins the prize for the strangest peacetime manipulation of the rules. 1639# From Shanks & Pottenger: 1640# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1641# Whitman gives 1923 Oct 1; go with Shanks & Pottenger. 1642Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS 1643Rule Uruguay 1924 1926 - Apr 1 0:00 0 - 1644Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS 1645Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS 1646# Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman. 1647Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 - 1648Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS 1649Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 - 1650# Whitman gives 1937 Oct 3; go with Shanks & Pottenger. 1651Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS 1652# Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13, 1653# and 1943 Apr 13 ``to present time''; go with Shanks & Pottenger. 1654Rule Uruguay 1941 only - Aug 1 0:00 0:30 HS 1655Rule Uruguay 1942 only - Jan 1 0:00 0 - 1656Rule Uruguay 1942 only - Dec 14 0:00 1:00 S 1657Rule Uruguay 1943 only - Mar 14 0:00 0 - 1658Rule Uruguay 1959 only - May 24 0:00 1:00 S 1659Rule Uruguay 1959 only - Nov 15 0:00 0 - 1660Rule Uruguay 1960 only - Jan 17 0:00 1:00 S 1661Rule Uruguay 1960 only - Mar 6 0:00 0 - 1662Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S 1663Rule Uruguay 1965 only - Sep 26 0:00 0 - 1664Rule Uruguay 1966 1967 - Oct 31 0:00 0 - 1665Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS 1666Rule Uruguay 1968 1970 - Dec 2 0:00 0 - 1667Rule Uruguay 1972 only - Apr 24 0:00 1:00 S 1668Rule Uruguay 1972 only - Aug 15 0:00 0 - 1669Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS 1670Rule Uruguay 1974 only - Dec 22 0:00 1:00 S 1671Rule Uruguay 1976 only - Oct 1 0:00 0 - 1672Rule Uruguay 1977 only - Dec 4 0:00 1:00 S 1673Rule Uruguay 1978 only - Apr 1 0:00 0 - 1674Rule Uruguay 1979 only - Oct 1 0:00 1:00 S 1675Rule Uruguay 1980 only - May 1 0:00 0 - 1676Rule Uruguay 1987 only - Dec 14 0:00 1:00 S 1677Rule Uruguay 1988 only - Mar 14 0:00 0 - 1678Rule Uruguay 1988 only - Dec 11 0:00 1:00 S 1679Rule Uruguay 1989 only - Mar 12 0:00 0 - 1680Rule Uruguay 1989 only - Oct 29 0:00 1:00 S 1681# Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2, 1682# and that 1992/3's DST was from 10-25 to 03-01. Go with IATA. 1683Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 - 1684Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S 1685Rule Uruguay 1992 only - Oct 18 0:00 1:00 S 1686Rule Uruguay 1993 only - Feb 28 0:00 0 - 1687# From Eduardo Cota (2004-09-20): 1688# The uruguayan government has decreed a change in the local time.... 1689# http://www.presidencia.gub.uy/decretos/2004091502.htm 1690Rule Uruguay 2004 only - Sep 19 0:00 1:00 S 1691# From Steffen Thorsen (2005-03-11): 1692# Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to 1693# save energy ... it was postponed two weeks.... 1694# http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm 1695Rule Uruguay 2005 only - Mar 27 2:00 0 - 1696# From Eduardo Cota (2005-09-27): 1697# http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF 1698# This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at 1699# 02:00 local time, official time in Uruguay will be at GMT -2. 1700Rule Uruguay 2005 only - Oct 9 2:00 1:00 S 1701Rule Uruguay 2006 only - Mar 12 2:00 0 - 1702# From Jesper Norgaard Welen (2006-09-06): 1703# http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF 1704Rule Uruguay 2006 max - Oct Sun>=1 2:00 1:00 S 1705Rule Uruguay 2007 max - Mar Sun>=8 2:00 0 - 1706# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1707Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28 1708 -3:44:44 - MMT 1920 May 1 # Montevideo MT 1709 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time 1710 -3:00 Uruguay UY%sT 1711 1712# Venezuela 1713# 1714# From John Stainforth (2007-11-28): 1715# ... the change for Venezuela originally expected for 2007-12-31 has 1716# been brought forward to 2007-12-09. The official announcement was 1717# published today in the "Gaceta Oficial de la Republica Bolivariana 1718# de Venezuela, numero 38.819" (official document for all laws or 1719# resolution publication) 1720# http://www.globovision.com/news.php?nid=72208 1721 1722# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1723Zone America/Caracas -4:27:44 - LMT 1890 1724 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time? 1725 -4:30 - VET 1965 # Venezuela Time 1726 -4:00 - VET 2007 Dec 9 03:00 1727 -4:30 - VET 1728
