1# @(#)southamerica 8.13 2# <pre> 3 4# This data is by no means authoritative; if you think you know better, 5# go ahead and edit the file (and please send any changes to 6# tz@elsie.nci.nih.gov for general use in the future). 7 8# From Paul Eggert (2006-03-22): 9# A good source for time zone historical data outside the U.S. is 10# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 11# San Diego: ACS Publications, Inc. (2003). 12# 13# Gwillim Law writes that a good source 14# for recent time zone data is the International Air Transport 15# Association's Standard Schedules Information Manual (IATA SSIM), 16# published semiannually. Law sent in several helpful summaries 17# of the IATA's data after 1990. 18# 19# Except where otherwise noted, Shanks & Pottenger is the source for 20# entries through 1990, and IATA SSIM is the source for entries afterwards. 21# 22# Earlier editions of these tables used the North American style (e.g. ARST and 23# ARDT for Argentine Standard and Daylight Time), but the following quote 24# suggests that it's better to use European style (e.g. ART and ARST). 25# I suggest the use of _Summer time_ instead of the more cumbersome 26# _daylight-saving time_. _Summer time_ seems to be in general use 27# in Europe and South America. 28# -- E O Cutler, _New York Times_ (1937-02-14), quoted in 29# H L Mencken, _The American Language: Supplement I_ (1960), p 466 30# 31# Earlier editions of these tables also used the North American style 32# for time zones in Brazil, but this was incorrect, as Brazilians say 33# "summer time". Reinaldo Goulart, a Sao Paulo businessman active in 34# the railroad sector, writes (1999-07-06): 35# The subject of time zones is currently a matter of discussion/debate in 36# Brazil. Let's say that "the Brasilia time" is considered the 37# "official time" because Brasilia is the capital city. 38# The other three time zones are called "Brasilia time "minus one" or 39# "plus one" or "plus two". As far as I know there is no such 40# name/designation as "Eastern Time" or "Central Time". 41# So I invented the following (English-language) abbreviations for now. 42# Corrections are welcome! 43# std dst 44# -2:00 FNT FNST Fernando de Noronha 45# -3:00 BRT BRST Brasilia 46# -4:00 AMT AMST Amazon 47# -5:00 ACT ACST Acre 48 49############################################################################### 50 51############################################################################### 52 53# Argentina 54 55# From Bob Devine (1988-01-28): 56# Argentina: first Sunday in October to first Sunday in April since 1976. 57# Double Summer time from 1969 to 1974. Switches at midnight. 58 59# From U. S. Naval Observatory (1988-01-199): 60# ARGENTINA 3 H BEHIND UTC 61 62# From Hernan G. Otero (1995-06-26): 63# I am sending modifications to the Argentine time zone table... 64# AR was chosen because they are the ISO letters that represent Argentina. 65 66# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 67Rule Arg 1930 only - Dec 1 0:00 1:00 S 68Rule Arg 1931 only - Apr 1 0:00 0 - 69Rule Arg 1931 only - Oct 15 0:00 1:00 S 70Rule Arg 1932 1940 - Mar 1 0:00 0 - 71Rule Arg 1932 1939 - Nov 1 0:00 1:00 S 72Rule Arg 1940 only - Jul 1 0:00 1:00 S 73Rule Arg 1941 only - Jun 15 0:00 0 - 74Rule Arg 1941 only - Oct 15 0:00 1:00 S 75Rule Arg 1943 only - Aug 1 0:00 0 - 76Rule Arg 1943 only - Oct 15 0:00 1:00 S 77Rule Arg 1946 only - Mar 1 0:00 0 - 78Rule Arg 1946 only - Oct 1 0:00 1:00 S 79Rule Arg 1963 only - Oct 1 0:00 0 - 80Rule Arg 1963 only - Dec 15 0:00 1:00 S 81Rule Arg 1964 1966 - Mar 1 0:00 0 - 82Rule Arg 1964 1966 - Oct 15 0:00 1:00 S 83Rule Arg 1967 only - Apr 2 0:00 0 - 84Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S 85Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 - 86Rule Arg 1974 only - Jan 23 0:00 1:00 S 87Rule Arg 1974 only - May 1 0:00 0 - 88Rule Arg 1988 only - Dec 1 0:00 1:00 S 89# 90# From Hernan G. Otero (1995-06-26): 91# These corrections were contributed by InterSoft Argentina S.A., 92# obtaining the data from the: 93# Talleres de Hidrografia Naval Argentina 94# (Argentine Naval Hydrography Institute) 95Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 - 96Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S 97# 98# From Hernan G. Otero (1995-06-26): 99# From this moment on, the law that mandated the daylight saving 100# time corrections was derogated and no more modifications 101# to the time zones (for daylight saving) are now made. 102# 103# From Rives McDow (2000-01-10): 104# On October 3, 1999, 0:00 local, Argentina implemented daylight savings time, 105# which did not result in the switch of a time zone, as they stayed 9 hours 106# from the International Date Line. 107Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S 108Rule Arg 2000 only - Mar Sun>=1 0:00 0 - 109# 110# From Peter Gradelski via Steffen Thorsen (2000-03-01): 111# We just checked with our Sao Paulo office and they say the government of 112# Argentina decided not to become one of the countries that go on or off DST. 113# So Buenos Aires should be -3 hours from GMT at all times. 114# 115# From Fabian L. Arce Jofre (2000-04-04): 116# The law that claimed DST for Argentina was derogated by President Fernando 117# de la Rua on March 2, 2000, because it would make people spend more energy 118# in the winter time, rather than less. The change took effect on March 3. 119# 120# From Mariano Absatz (2001-06-06): 121# one of the major newspapers here in Argentina said that the 1999 122# Timezone Law (which never was effectively applied) will (would?) be 123# in effect.... The article is at 124# http://ar.clarin.com/diario/2001-06-06/e-01701.htm 125# ... The Law itself is "Ley No 25155", sanctioned on 1999-08-25, enacted 126# 1999-09-17, and published 1999-09-21. The official publication is at: 127# http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF 128# Regretfully, you have to subscribe (and pay) for the on-line version.... 129# 130# (2001-06-12): 131# the timezone for Argentina will not change next Sunday. 132# Apparently it will do so on Sunday 24th.... 133# http://ar.clarin.com/diario/2001-06-12/s-03501.htm 134# 135# (2001-06-25): 136# Last Friday (yes, the last working day before the date of the change), the 137# Senate annulled the 1999 law that introduced the changes later postponed. 138# http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm 139# It remains the vote of the Deputies..., but it will be the same.... 140# This kind of things had always been done this way in Argentina. 141# We are still -03:00 all year round in all of the country. 142# 143# From Mariano Absatz (2004-05-21): 144# Today it was officially published that the Province of Mendoza is changing 145# its timezone this winter... starting tomorrow night.... 146# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf 147# From Paul Eggert (2004-05-24): 148# It's Law No. 7,210. This change is due to a public power emergency, so for 149# now we'll assume it's for this year only. 150# 151# From Paul Eggert (2006-03-22): 152# <a href="http://www.spicasc.net/horvera.html"> 153# Hora de verano para la Republica Argentina (2003-06-08) 154# </a> says that standard time in Argentina from 1894-10-31 155# to 1920-05-01 was -4:16:48.25. Go with this more-precise value 156# over Shanks & Pottenger. 157# 158# From Mariano Absatz (2004-06-05): 159# These media articles from a major newspaper mostly cover the current state: 160# http://www.lanacion.com.ar/04/05/27/de_604825.asp 161# http://www.lanacion.com.ar/04/05/28/de_605203.asp 162# 163# The following eight (8) provinces pulled clocks back to UTC-04:00 at 164# midnight Monday May 31st. (that is, the night between 05/31 and 06/01). 165# Apparently, all nine provinces would go back to UTC-03:00 at the same 166# time in October 17th. 167# 168# Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz, 169# Tierra del Fuego, Tucuman. 170# 171# From Mariano Absatz (2004-06-14): 172# ... this weekend, the Province of Tucuman decided it'd go back to UTC-03:00 173# yesterday midnight (that is, at 24:00 Saturday 12th), since the people's 174# annoyance with the change is much higher than the power savings obtained.... 175# 176# From Gwillim Law (2004-06-14): 177# http://www.lanacion.com.ar/04/06/10/de_609078.asp ... 178# "The time change in Tierra del Fuego was a conflicted decision from 179# the start. The government had decreed that the measure would take 180# effect on June 1, but a normative error forced the new time to begin 181# three days earlier, from a Saturday to a Sunday.... 182# Our understanding was that the change was originally scheduled to take place 183# on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other 184# provinces). Sunday was May 30, only two days earlier. So the article 185# contains a contradiction. I would give more credence to the Saturday/Sunday 186# date than the "three days earlier" phrase, and conclude that Tierra del 187# Fuego set its clocks back at 2004-05-30 00:00. 188# 189# From Steffen Thorsen (2004-10-05): 190# The previous law 7210 which changed the province of Mendoza's time zone 191# back in May have been modified slightly in a new law 7277, which set the 192# new end date to 2004-09-26 (original date was 2004-10-17). 193# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf 194# 195# From Mariano Absatz (2004-10-05): 196# San Juan changed from UTC-03:00 to UTC-04:00 at midnight between 197# Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00 198# at midnight between Saturday, July 24th and Sunday, July 25th.... 199# http://www.sanjuan.gov.ar/prensa/archivo/000329.html 200# http://www.sanjuan.gov.ar/prensa/archivo/000426.html 201# http://www.sanjuan.gov.ar/prensa/archivo/000441.html 202 203# Unless otherwise specified, data are from Shanks & Pottenger through 1992, 204# from the IATA otherwise. As noted below, Shanks & Pottenger say that 205# America/Cordoba split into 6 subregions during 1991/1992, but we 206# haven't verified this yet so for now we'll keep it a single region. 207# 208# Zone NAME GMTOFF RULES FORMAT [UNTIL] 209# 210# Buenos Aires (BA), Capital Federal (CF), 211Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31 212 -4:16:48 - CMT 1920 May # Cordoba Mean Time 213 -4:00 - ART 1930 Dec 214 -4:00 Arg AR%sT 1969 Oct 5 215 -3:00 Arg AR%sT 1999 Oct 3 216 -4:00 Arg AR%sT 2000 Mar 3 217 -3:00 - ART 218# 219# Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN), Chaco (CC), 220# Formosa (FM), Salta (SA), Santiago del Estero (SE), Cordoba (CB), 221# San Luis (SL), La Pampa (LP), Neuquen (NQ), Rio Negro (RN) 222# 223# Shanks & Pottenger also make the following claims, which we haven't verified: 224# - Formosa switched to -3:00 on 1991-01-07. 225# - Misiones switched to -3:00 on 1990-12-29. 226# - Chaco switched to -3:00 on 1991-01-04. 227# - San Luis switched to -4:00 on 1990-03-14, then to -3:00 on 1990-10-15, 228# then to -4:00 on 1991-03-01, then to -3:00 on 1991-06-01. 229# - Santiago del Estero switched to -4:00 on 1991-04-01, 230# then to -3:00 on 1991-04-26. 231# 232Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31 233 -4:16:48 - CMT 1920 May 234 -4:00 - ART 1930 Dec 235 -4:00 Arg AR%sT 1969 Oct 5 236 -3:00 Arg AR%sT 1991 Mar 3 237 -4:00 - WART 1991 Oct 20 238 -3:00 Arg AR%sT 1999 Oct 3 239 -4:00 Arg AR%sT 2000 Mar 3 240 -3:00 - ART 241# 242# Tucuman (TM) 243Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31 244 -4:16:48 - CMT 1920 May 245 -4:00 - ART 1930 Dec 246 -4:00 Arg AR%sT 1969 Oct 5 247 -3:00 Arg AR%sT 1991 Mar 3 248 -4:00 - WART 1991 Oct 20 249 -3:00 Arg AR%sT 1999 Oct 3 250 -4:00 Arg AR%sT 2000 Mar 3 251 -3:00 - ART 2004 Jun 1 252 -4:00 - WART 2004 Jun 13 253 -3:00 - ART 254# 255# La Rioja (LR) 256Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31 257 -4:16:48 - CMT 1920 May 258 -4:00 - ART 1930 Dec 259 -4:00 Arg AR%sT 1969 Oct 5 260 -3:00 Arg AR%sT 1991 Mar 1 261 -4:00 - WART 1991 May 7 262 -3:00 Arg AR%sT 1999 Oct 3 263 -4:00 Arg AR%sT 2000 Mar 3 264 -3:00 - ART 2004 Jun 1 265 -4:00 - WART 2004 Jun 20 266 -3:00 - ART 267# 268# San Juan (SJ) 269Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31 270 -4:16:48 - CMT 1920 May 271 -4:00 - ART 1930 Dec 272 -4:00 Arg AR%sT 1969 Oct 5 273 -3:00 Arg AR%sT 1991 Mar 1 274 -4:00 - WART 1991 May 7 275 -3:00 Arg AR%sT 1999 Oct 3 276 -4:00 Arg AR%sT 2000 Mar 3 277 -3:00 - ART 2004 May 31 278 -4:00 - WART 2004 Jul 25 279 -3:00 - ART 280# 281# Jujuy (JY) 282Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31 283 -4:16:48 - CMT 1920 May 284 -4:00 - ART 1930 Dec 285 -4:00 Arg AR%sT 1969 Oct 5 286 -3:00 Arg AR%sT 1990 Mar 4 287 -4:00 - WART 1990 Oct 28 288 -4:00 1:00 WARST 1991 Mar 17 289 -4:00 - WART 1991 Oct 6 290 -3:00 1:00 ARST 1992 291 -3:00 Arg AR%sT 1999 Oct 3 292 -4:00 Arg AR%sT 2000 Mar 3 293 -3:00 - ART 294# 295# Catamarca (CT), Chubut (CH) 296Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31 297 -4:16:48 - CMT 1920 May 298 -4:00 - ART 1930 Dec 299 -4:00 Arg AR%sT 1969 Oct 5 300 -3:00 Arg AR%sT 1991 Mar 3 301 -4:00 - WART 1991 Oct 20 302 -3:00 Arg AR%sT 1999 Oct 3 303 -4:00 Arg AR%sT 2000 Mar 3 304 -3:00 - ART 2004 Jun 1 305 -4:00 - WART 2004 Jun 20 306 -3:00 - ART 307# 308# Mendoza (MZ) 309Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31 310 -4:16:48 - CMT 1920 May 311 -4:00 - ART 1930 Dec 312 -4:00 Arg AR%sT 1969 Oct 5 313 -3:00 Arg AR%sT 1990 Mar 4 314 -4:00 - WART 1990 Oct 15 315 -4:00 1:00 WARST 1991 Mar 1 316 -4:00 - WART 1991 Oct 15 317 -4:00 1:00 WARST 1992 Mar 1 318 -4:00 - WART 1992 Oct 18 319 -3:00 Arg AR%sT 1999 Oct 3 320 -4:00 Arg AR%sT 2000 Mar 3 321 -3:00 - ART 2004 May 23 322 -4:00 - WART 2004 Sep 26 323 -3:00 - ART 324# 325# Santa Cruz (SC) 326Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31 327 -4:16:48 - CMT 1920 May # Cordoba Mean Time 328 -4:00 - ART 1930 Dec 329 -4:00 Arg AR%sT 1969 Oct 5 330 -3:00 Arg AR%sT 1999 Oct 3 331 -4:00 Arg AR%sT 2000 Mar 3 332 -3:00 - ART 2004 Jun 1 333 -4:00 - WART 2004 Jun 20 334 -3:00 - ART 335# 336# Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF) 337Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31 338 -4:16:48 - CMT 1920 May # Cordoba Mean Time 339 -4:00 - ART 1930 Dec 340 -4:00 Arg AR%sT 1969 Oct 5 341 -3:00 Arg AR%sT 1999 Oct 3 342 -4:00 Arg AR%sT 2000 Mar 3 343 -3:00 - ART 2004 May 30 344 -4:00 - WART 2004 Jun 20 345 -3:00 - ART 346 347# Aruba 348# Zone NAME GMTOFF RULES FORMAT [UNTIL] 349Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad 350 -4:30 - ANT 1965 # Netherlands Antilles Time 351 -4:00 - AST 352 353# Bolivia 354# Zone NAME GMTOFF RULES FORMAT [UNTIL] 355Zone America/La_Paz -4:32:36 - LMT 1890 356 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT 357 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST 358 -4:00 - BOT # Bolivia Time 359 360# Brazil 361 362# From Paul Eggert (1993-11-18): 363# The mayor of Rio recently attempted to change the time zone rules 364# just in his city, in order to leave more summer time for the tourist trade. 365# The rule change lasted only part of the day; 366# the federal government refused to follow the city's rules, and business 367# was in a chaos, so the mayor backed down that afternoon. 368 369# From IATA SSIM (1996-02): 370# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS), 371# Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ), 372# Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO), 373# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL]. 374# [The last three states are new to this issue of the IATA SSIM.] 375 376# From Gwillim Law (1996-10-07): 377# Geography, history (Tocantins was part of Goias until 1989), and other 378# sources of time zone information lead me to believe that AL, SE, and TO were 379# always in BR1, and so the only change was whether or not they observed DST.... 380# The earliest issue of the SSIM I have is 2/91. Each issue from then until 381# 9/95 says that DST is observed only in the ten states I quoted from 9/95, 382# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2 383# (UTC-4).... The other two time zones given for Brazil are BR3, which is 384# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is 385# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's 386# become part of the state of Pernambuco). The boundary between BR1 and BR2 387# has never been clearly stated. They've simply been called East and West. 388# However, some conclusions can be drawn from another IATA manual: the Airline 389# Coding Directory, which lists close to 400 airports in Brazil. For each 390# airport it gives a time zone which is coded to the SSIM. From that 391# information, I'm led to conclude that the states of Amapa (AP), Ceara (CE), 392# Maranhao (MA), Paraiba (PR), Pernambuco (PE), Piaui (PI), and Rio Grande do 393# Norte (RN), and the eastern part of Para (PA) are all in BR1 without DST. 394 395# From Marcos Tadeu (1998-09-27): 396# <a href="http://pcdsh01.on.br/verao1.html"> 397# Brazilian official page 398# </a> 399 400# From Jesper Norgaard (2000-11-03): 401# [For an official list of which regions in Brazil use which time zones, see:] 402# http://pcdsh01.on.br/Fusbr.htm 403# http://pcdsh01.on.br/Fusbrhv.htm 404 405# From Celso Doria via David Madeo (2002-10-09): 406# The reason for the delay this year has to do with elections in Brazil. 407# 408# Unlike in the United States, elections in Brazil are 100% computerized and 409# the results are known almost immediately. Yesterday, it was the first 410# round of the elections when 115 million Brazilians voted for President, 411# Governor, Senators, Federal Deputies, and State Deputies. Nobody is 412# counting (or re-counting) votes anymore and we know there will be a second 413# round for the Presidency and also for some Governors. The 2nd round will 414# take place on October 27th. 415# 416# The reason why the DST will only begin November 3rd is that the thousands 417# of electoral machines used cannot have their time changed, and since the 418# Constitution says the elections must begin at 8:00 AM and end at 5:00 PM, 419# the Government decided to postpone DST, instead of changing the Constitution 420# (maybe, for the next elections, it will be possible to change the clock)... 421 422# From Rodrigo Severo (2004-10-04): 423# It's just the biannual change made necessary by the much hyped, supposedly 424# modern Brazilian eletronic voting machines which, apparently, can't deal 425# with a time change between the first and the second rounds of the elections. 426 427# From Steffen Thorsen (2007-09-20): 428# Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00: 429# http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975 430 431# From Paul Eggert (2002-10-10): 432# The official decrees referenced below are mostly taken from 433# <a href="http://pcdsh01.on.br/DecHV.html"> 434# Decretos sobre o Horario de Verao no Brasil 435# </a>. 436 437# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 438# Decree <a href="http://pcdsh01.on.br/HV20466.htm">20,466</a> (1931-10-01) 439# Decree <a href="http://pcdsh01.on.br/HV21896.htm">21,896</a> (1932-01-10) 440Rule Brazil 1931 only - Oct 3 11:00 1:00 S 441Rule Brazil 1932 1933 - Apr 1 0:00 0 - 442Rule Brazil 1932 only - Oct 3 0:00 1:00 S 443# Decree <a href="http://pcdsh01.on.br/HV23195.htm">23,195</a> (1933-10-10) 444# revoked DST. 445# Decree <a href="http://pcdsh01.on.br/HV27496.htm">27,496</a> (1949-11-24) 446# Decree <a href="http://pcdsh01.on.br/HV27998.htm">27,998</a> (1950-04-13) 447Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S 448Rule Brazil 1950 only - Apr 16 1:00 0 - 449Rule Brazil 1951 1952 - Apr 1 0:00 0 - 450# Decree <a href="http://pcdsh01.on.br/HV32308.htm">32,308</a> (1953-02-24) 451Rule Brazil 1953 only - Mar 1 0:00 0 - 452# Decree <a href="http://pcdsh01.on.br/HV34724.htm">34,724</a> (1953-11-30) 453# revoked DST. 454# Decree <a href="http://pcdsh01.on.br/HV52700.htm">52,700</a> (1963-10-18) 455# established DST from 1963-10-23 00:00 to 1964-02-29 00:00 456# in SP, RJ, GB, MG, ES, due to the prolongation of the drought. 457# Decree <a href="http://pcdsh01.on.br/HV53071.htm">53,071</a> (1963-12-03) 458# extended the above decree to all of the national territory on 12-09. 459Rule Brazil 1963 only - Dec 9 0:00 1:00 S 460# Decree <a href="http://pcdsh01.on.br/HV53604.htm">53,604</a> (1964-02-25) 461# extended summer time by one day to 1964-03-01 00:00 (start of school). 462Rule Brazil 1964 only - Mar 1 0:00 0 - 463# Decree <a href="http://pcdsh01.on.br/HV55639.htm">55,639</a> (1965-01-27) 464Rule Brazil 1965 only - Jan 31 0:00 1:00 S 465Rule Brazil 1965 only - Mar 31 0:00 0 - 466# Decree <a href="http://pcdsh01.on.br/HV57303.htm">57,303</a> (1965-11-22) 467Rule Brazil 1965 only - Dec 1 0:00 1:00 S 468# Decree <a href="http://pcdsh01.on.br/HV57843.htm">57,843</a> (1966-02-18) 469Rule Brazil 1966 1968 - Mar 1 0:00 0 - 470Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S 471# Decree <a href="http://pcdsh01.on.br/HV63429.htm">63,429</a> (1968-10-15) 472# revoked DST. 473# Decree <a href="http://pcdsh01.on.br/HV91698.htm">91,698</a> (1985-09-27) 474Rule Brazil 1985 only - Nov 2 0:00 1:00 S 475# Decree 92,310 (1986-01-21) 476# Decree 92,463 (1986-03-13) 477Rule Brazil 1986 only - Mar 15 0:00 0 - 478# Decree 93,316 (1986-10-01) 479Rule Brazil 1986 only - Oct 25 0:00 1:00 S 480Rule Brazil 1987 only - Feb 14 0:00 0 - 481# Decree <a href="http://pcdsh01.on.br/HV94922.htm">94,922</a> (1987-09-22) 482Rule Brazil 1987 only - Oct 25 0:00 1:00 S 483Rule Brazil 1988 only - Feb 7 0:00 0 - 484# Decree <a href="http://pcdsh01.on.br/HV96676.htm">96,676</a> (1988-09-12) 485# except for the states of AC, AM, PA, RR, RO, and AP (then a territory) 486Rule Brazil 1988 only - Oct 16 0:00 1:00 S 487Rule Brazil 1989 only - Jan 29 0:00 0 - 488# Decree <a href="http://pcdsh01.on.br/HV98077.htm">98,077</a> (1989-08-21) 489# with the same exceptions 490Rule Brazil 1989 only - Oct 15 0:00 1:00 S 491Rule Brazil 1990 only - Feb 11 0:00 0 - 492# Decree <a href="http://pcdsh01.on.br/HV99530.htm">99,530</a> (1990-09-17) 493# adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF. 494# Decree 99,629 (1990-10-19) adds BA, MT. 495Rule Brazil 1990 only - Oct 21 0:00 1:00 S 496Rule Brazil 1991 only - Feb 17 0:00 0 - 497# <a href="http://pcdsh01.on.br/HV1991.htm">Unnumbered decree</a> (1991-09-25) 498# adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF. 499Rule Brazil 1991 only - Oct 20 0:00 1:00 S 500Rule Brazil 1992 only - Feb 9 0:00 0 - 501# <a href="http://pcdsh01.on.br/HV1992.htm">Unnumbered decree</a> (1992-10-16) 502# adopted by same states. 503Rule Brazil 1992 only - Oct 25 0:00 1:00 S 504Rule Brazil 1993 only - Jan 31 0:00 0 - 505# Decree <a href="http://pcdsh01.on.br/HV942.htm">942</a> (1993-09-28) 506# adopted by same states, plus AM. 507# Decree <a href="http://pcdsh01.on.br/HV1252.htm">1,252</a> (1994-09-22; 508# web page corrected 2004-01-07) adopted by same states, minus AM. 509# Decree <a href="http://pcdsh01.on.br/HV1636.htm">1,636</a> (1995-09-14) 510# adopted by same states, plus MT and TO. 511# Decree <a href="http://pcdsh01.on.br/HV1674.htm">1,674</a> (1995-10-13) 512# adds AL, SE. 513Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S 514Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 - 515Rule Brazil 1996 only - Feb 11 0:00 0 - 516# Decree <a href="http://pcdsh01.on.br/HV2000.htm">2,000</a> (1996-09-04) 517# adopted by same states, minus AL, SE. 518Rule Brazil 1996 only - Oct 6 0:00 1:00 S 519Rule Brazil 1997 only - Feb 16 0:00 0 - 520# From Daniel C. Sobral (1998-02-12): 521# In 1997, the DS began on October 6. The stated reason was that 522# because international television networks ignored Brazil's policy on DS, 523# they bought the wrong times on satellite for coverage of Pope's visit. 524# This year, the ending date of DS was postponed to March 1 525# to help dealing with the shortages of electric power. 526# 527# Decree 2,317 (1997-09-04), adopted by same states. 528Rule Brazil 1997 only - Oct 6 0:00 1:00 S 529# Decree <a href="http://pcdsh01.on.br/figuras/HV2495.JPG">2,495</a> 530# (1998-02-10) 531Rule Brazil 1998 only - Mar 1 0:00 0 - 532# Decree <a href="http://pcdsh01.on.br/figuras/Hv98.jpg">2,780</a> (1998-09-11) 533# adopted by the same states as before. 534Rule Brazil 1998 only - Oct 11 0:00 1:00 S 535Rule Brazil 1999 only - Feb 21 0:00 0 - 536# Decree <a href="http://pcdsh01.on.br/figuras/HV3150.gif">3,150</a> 537# (1999-08-23) adopted by same states. 538# Decree <a href="http://pcdsh01.on.br/DecHV99.gif">3,188</a> (1999-09-30) 539# adds SE, AL, PB, PE, RN, CE, PI, MA and RR. 540Rule Brazil 1999 only - Oct 3 0:00 1:00 S 541Rule Brazil 2000 only - Feb 27 0:00 0 - 542# Decree <a href="http://pcdsh01.on.br/DEC3592.htm">3,592</a> (2000-09-06) 543# adopted by the same states as before. 544# Decree <a href="http://pcdsh01.on.br/Dec3630.jpg">3,630</a> (2000-10-13) 545# repeals DST in PE and RR, effective 2000-10-15 00:00. 546# Decree <a href="http://pcdsh01.on.br/Dec3632.jpg">3,632</a> (2000-10-17) 547# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00. 548# Decree <a href="http://pcdsh01.on.br/figuras/HV3916.gif">3,916</a> 549# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE. 550Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S 551Rule Brazil 2001 2006 - Feb Sun>=15 0:00 0 - 552# Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE. 553# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm"></a> 554Rule Brazil 2002 only - Nov 3 0:00 1:00 S 555# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO. 556# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm"></a> 557Rule Brazil 2003 only - Oct 19 0:00 1:00 S 558# Decree 5,223 (2004-10-01) reestablishes DST in MT. 559# <a href="http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm"></a> 560Rule Brazil 2004 only - Nov 2 0:00 1:00 S 561# Decree <a href="http://pcdsh01.on.br/DecHV5539.gif">5,539</a> (2005-09-19), 562# adopted by the same states as before. 563Rule Brazil 2005 only - Oct 16 0:00 1:00 S 564# Decree <a href="http://pcdsh01.on.br/DecHV5920.gif">5,920</a> (2006-10-03), 565# adopted by the same states as before. 566Rule Brazil 2006 only - Nov 5 0:00 1:00 S 567Rule Brazil 2007 only - Feb 25 0:00 0 - 568# (Decree number not yet known) 569# http://www.brasil.gov.br/noticias/ultimas_noticias/horario_verao070920/ 570# (2007-09-20) after a heads-up from Steffen Thorsen: 571Rule Brazil 2007 max - Oct Sun>=8 0:00 1:00 S 572Rule Brazil 2008 max - Feb Sun>=15 0:00 0 - 573# The latest ruleset listed above says that the following states observe DST: 574# DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP. 575# For dates after mid-2008, the above rules with TO="max" are guesses 576# and are quite possibly wrong, but are more likely than no DST at all. 577 578 579# Zone NAME GMTOFF RULES FORMAT [UNTIL] 580# 581# Fernando de Noronha (administratively part of PE) 582Zone America/Noronha -2:09:40 - LMT 1914 583 -2:00 Brazil FN%sT 1990 Sep 17 584 -2:00 - FNT 1999 Sep 30 585 -2:00 Brazil FN%sT 2000 Oct 15 586 -2:00 - FNT 2001 Sep 13 587 -2:00 Brazil FN%sT 2002 Oct 1 588 -2:00 - FNT 589# Other Atlantic islands have no permanent settlement. 590# These include Trindade and Martin Vaz (administratively part of ES), 591# Atol das Rocas (RN), and Penedos de Sao Pedro e Sao Paulo (PE). 592# Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01; 593# it also included the Penedos. 594# 595# Amapa (AP), east Para (PA) 596# East Para includes Belem, Maraba, Serra Norte, and Sao Felix do Xingu. 597# The division between east and west Para is the river Xingu. 598# In the north a very small part from the river Javary (now Jari I guess, 599# the border with Amapa) to the Amazon, then to the Xingu. 600Zone America/Belem -3:13:56 - LMT 1914 601 -3:00 Brazil BR%sT 1988 Sep 12 602 -3:00 - BRT 603# 604# Maranhao (MA), Piaui (PI), Ceara (CE), Rio Grande do Norte (RN), 605# Paraiba (PB) 606Zone America/Fortaleza -2:34:00 - LMT 1914 607 -3:00 Brazil BR%sT 1990 Sep 17 608 -3:00 - BRT 1999 Sep 30 609 -3:00 Brazil BR%sT 2000 Oct 22 610 -3:00 - BRT 2001 Sep 13 611 -3:00 Brazil BR%sT 2002 Oct 1 612 -3:00 - BRT 613# 614# Pernambuco (PE) (except Atlantic islands) 615Zone America/Recife -2:19:36 - LMT 1914 616 -3:00 Brazil BR%sT 1990 Sep 17 617 -3:00 - BRT 1999 Sep 30 618 -3:00 Brazil BR%sT 2000 Oct 15 619 -3:00 - BRT 2001 Sep 13 620 -3:00 Brazil BR%sT 2002 Oct 1 621 -3:00 - BRT 622# 623# Tocantins (TO) 624Zone America/Araguaina -3:12:48 - LMT 1914 625 -3:00 Brazil BR%sT 1990 Sep 17 626 -3:00 - BRT 1995 Sep 14 627 -3:00 Brazil BR%sT 2003 Sep 24 628 -3:00 - BRT 629# 630# Alagoas (AL), Sergipe (SE) 631Zone America/Maceio -2:22:52 - LMT 1914 632 -3:00 Brazil BR%sT 1990 Sep 17 633 -3:00 - BRT 1995 Oct 13 634 -3:00 Brazil BR%sT 1996 Sep 4 635 -3:00 - BRT 1999 Sep 30 636 -3:00 Brazil BR%sT 2000 Oct 22 637 -3:00 - BRT 2001 Sep 13 638 -3:00 Brazil BR%sT 2002 Oct 1 639 -3:00 - BRT 640# 641# Bahia (BA) 642# There are too many Salvadors elsewhere, so use America/Bahia instead 643# of America/Salvador. 644Zone America/Bahia -2:34:04 - LMT 1914 645 -3:00 Brazil BR%sT 2003 Sep 24 646 -3:00 - BRT 647# 648# Goias (GO), Distrito Federal (DF), Minas Gerais (MG), 649# Espirito Santo (ES), Rio de Janeiro (RJ), Sao Paulo (SP), Parana (PR), 650# Santa Catarina (SC), Rio Grande do Sul (RS) 651Zone America/Sao_Paulo -3:06:28 - LMT 1914 652 -3:00 Brazil BR%sT 1963 Oct 23 00:00 653 -3:00 1:00 BRST 1964 654 -3:00 Brazil BR%sT 655# 656# Mato Grosso do Sul (MS) 657Zone America/Campo_Grande -3:38:28 - LMT 1914 658 -4:00 Brazil AM%sT 659# 660# Mato Grosso (MT) 661Zone America/Cuiaba -3:44:20 - LMT 1914 662 -4:00 Brazil AM%sT 2003 Sep 24 663 -4:00 - AMT 2004 Oct 1 664 -4:00 Brazil AM%sT 665# 666# west Para (PA), Rondonia (RO) 667# West Para includes Altamira, Oribidos, Prainha, Oriximina, and Santarem. 668Zone America/Porto_Velho -4:15:36 - LMT 1914 669 -4:00 Brazil AM%sT 1988 Sep 12 670 -4:00 - AMT 671# 672# Roraima (RR) 673Zone America/Boa_Vista -4:02:40 - LMT 1914 674 -4:00 Brazil AM%sT 1988 Sep 12 675 -4:00 - AMT 1999 Sep 30 676 -4:00 Brazil AM%sT 2000 Oct 15 677 -4:00 - AMT 678# 679# east Amazonas (AM): Boca do Acre, Jutai, Manaus, Floriano Peixoto 680# The great circle line from Tabatinga to Porto Acre divides 681# east from west Amazonas. 682Zone America/Manaus -4:00:04 - LMT 1914 683 -4:00 Brazil AM%sT 1988 Sep 12 684 -4:00 - AMT 1993 Sep 28 685 -4:00 Brazil AM%sT 1994 Sep 22 686 -4:00 - AMT 687# 688# west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant, 689# Eirunepe, Envira, Ipixuna 690Zone America/Eirunepe -4:39:28 - LMT 1914 691 -5:00 Brazil AC%sT 1988 Sep 12 692 -5:00 - ACT 1993 Sep 28 693 -5:00 Brazil AC%sT 1994 Sep 22 694 -5:00 - ACT 695# 696# Acre (AC) 697Zone America/Rio_Branco -4:31:12 - LMT 1914 698 -5:00 Brazil AC%sT 1988 Sep 12 699 -5:00 - ACT 700 701 702# Chile 703 704# From Eduardo Krell (1995-10-19): 705# The law says to switch to DST at midnight [24:00] on the second SATURDAY 706# of October.... The law is the same for March and October. 707# (1998-09-29): 708# Because of the drought this year, the government decided to go into 709# DST earlier (saturday 9/26 at 24:00). This is a one-time change only ... 710# (unless there's another dry season next year, I guess). 711 712# From Julio I. Pacheco Troncoso (1999-03-18): 713# Because of the same drought, the government decided to end DST later, 714# on April 3, (one-time change). 715 716# From Oscar van Vlijmen (2006-10-08): 717# http://www.horaoficial.cl/cambio.htm 718 719# From Jesper Norgaard Welen (2006-10-08): 720# I think that there are some obvious mistakes in the suggested link 721# from Oscar van Vlijmen,... for instance entry 66 says that GMT-4 722# ended 1990-09-12 while entry 67 only begins GMT-3 at 1990-09-15 723# (they should have been 1990-09-15 and 1990-09-16 respectively), but 724# anyhow it clears up some doubts too. 725 726# From Paul Eggert (2006-12-27): 727# The following data for Chile and America/Santiago are from 728# <http://www.horaoficial.cl/horaof.htm> (2006-09-20), transcribed by 729# Jesper Norgaard Welen. The data for Pacific/Easter are from Shanks 730# & Pottenger, except with DST transitions after 1932 cloned from 731# America/Santiago. The pre-1980 Pacific/Easter data are dubious, 732# but we have no other source. 733 734# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 735Rule Chile 1927 1932 - Sep 1 0:00 1:00 S 736Rule Chile 1928 1932 - Apr 1 0:00 0 - 737Rule Chile 1942 only - Jun 1 4:00u 0 - 738Rule Chile 1942 only - Aug 1 5:00u 1:00 S 739Rule Chile 1946 only - Jul 15 4:00u 1:00 S 740Rule Chile 1946 only - Sep 1 3:00u 0:00 - 741Rule Chile 1947 only - Apr 1 4:00u 0 - 742Rule Chile 1968 only - Nov 3 4:00u 1:00 S 743Rule Chile 1969 only - Mar 30 3:00u 0 - 744Rule Chile 1969 only - Nov 23 4:00u 1:00 S 745Rule Chile 1970 only - Mar 29 3:00u 0 - 746Rule Chile 1971 only - Mar 14 3:00u 0 - 747Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S 748Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 - 749Rule Chile 1973 only - Sep 30 4:00u 1:00 S 750Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S 751Rule Chile 1987 only - Apr 12 3:00u 0 - 752Rule Chile 1988 1989 - Mar Sun>=9 3:00u 0 - 753Rule Chile 1988 only - Oct Sun>=1 4:00u 1:00 S 754Rule Chile 1989 only - Oct Sun>=9 4:00u 1:00 S 755Rule Chile 1990 only - Mar 18 3:00u 0 - 756Rule Chile 1990 only - Sep 16 4:00u 1:00 S 757Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 - 758Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S 759Rule Chile 1997 only - Mar 30 3:00u 0 - 760Rule Chile 1998 only - Mar Sun>=9 3:00u 0 - 761Rule Chile 1998 only - Sep 27 4:00u 1:00 S 762Rule Chile 1999 only - Apr 4 3:00u 0 - 763Rule Chile 1999 max - Oct Sun>=9 4:00u 1:00 S 764Rule Chile 2000 max - Mar Sun>=9 3:00u 0 - 765# IATA SSIM anomalies: (1992-02) says 1992-03-14; 766# (1996-09) says 1998-03-08. Ignore these. 767# Zone NAME GMTOFF RULES FORMAT [UNTIL] 768Zone America/Santiago -4:42:46 - LMT 1890 769 -4:42:46 - SMT 1910 # Santiago Mean Time 770 -5:00 - CLT 1916 Jul 1 # Chile Time 771 -4:42:46 - SMT 1918 Sep 1 # Santiago Mean Time 772 -4:00 - CLT 1919 Jul 1 # Chile Time 773 -4:42:46 - SMT 1927 Sep 1 # Santiago Mean Time 774 -5:00 Chile CL%sT 1947 May 22 # Chile Time 775 -4:00 Chile CL%sT 776Zone Pacific/Easter -7:17:44 - LMT 1890 777 -7:17:28 - EMT 1932 Sep # Easter Mean Time 778 -7:00 Chile EAS%sT 1982 Mar 13 21:00 # Easter I Time 779 -6:00 Chile EAS%sT 780# 781# Sala y Gomez Island is like Pacific/Easter. 782# Other Chilean locations, including Juan Fernandez Is, San Ambrosio, 783# San Felix, and Antarctic bases, are like America/Santiago. 784 785# Colombia 786# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 787Rule CO 1992 only - May 3 0:00 1:00 S 788Rule CO 1993 only - Apr 4 0:00 0 - 789# Zone NAME GMTOFF RULES FORMAT [UNTIL] 790Zone America/Bogota -4:56:20 - LMT 1884 Mar 13 791 -4:56:20 - BMT 1914 Nov 23 # Bogota Mean Time 792 -5:00 CO CO%sT # Colombia Time 793# Malpelo, Providencia, San Andres 794# no information; probably like America/Bogota 795 796# Curacao 797# 798# From Paul Eggert (2006-03-22): 799# Shanks & Pottenger say that The Bottom and Philipsburg have been at 800# -4:00 since standard time was introduced on 1912-03-02; and that 801# Kralendijk and Rincon used Kralendijk Mean Time (-4:33:08) from 802# 1912-02-02 to 1965-01-01. The former is dubious, since S&P also say 803# Saba Island has been like Curacao. 804# This all predates our 1970 cutoff, though. 805# 806# By July 2007 Curacao and St Maarten are planned to become 807# associated states within the Netherlands, much like Aruba; 808# Bonaire, Saba and St Eustatius would become directly part of the 809# Netherlands as Kingdom Islands. This won't affect their time zones 810# though, as far as we know. 811# 812# Zone NAME GMTOFF RULES FORMAT [UNTIL] 813Zone America/Curacao -4:35:44 - LMT 1912 Feb 12 # Willemstad 814 -4:30 - ANT 1965 # Netherlands Antilles Time 815 -4:00 - AST 816 817# Ecuador 818# 819# From Paul Eggert (2007-03-04): 820# Apparently Ecuador had a failed experiment with DST in 1992. 821# <http://midena.gov.ec/content/view/1261/208/> (2007-02-27) and 822# <http://www.hoy.com.ec/NoticiaNue.asp?row_id=249856> (2006-11-06) both 823# talk about "hora Sixto". Leave this alone for now, as we have no data. 824# 825# Zone NAME GMTOFF RULES FORMAT [UNTIL] 826Zone America/Guayaquil -5:19:20 - LMT 1890 827 -5:14:00 - QMT 1931 # Quito Mean Time 828 -5:00 - ECT # Ecuador Time 829Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno 830 -5:00 - ECT 1986 831 -6:00 - GALT # Galapagos Time 832 833# Falklands 834 835# From Paul Eggert (2006-03-22): 836# Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except 837# the IATA gives 1996-09-08. Go with Shanks & Pottenger. 838 839# From Falkland Islands Government Office, London (2001-01-22) 840# via Jesper Norgaard: 841# ... the clocks revert back to Local Mean Time at 2 am on Sunday 15 842# April 2001 and advance one hour to summer time at 2 am on Sunday 2 843# September. It is anticipated that the clocks will revert back at 2 844# am on Sunday 21 April 2002 and advance to summer time at 2 am on 845# Sunday 1 September. 846 847# From Rives McDow (2001-02-13): 848# 849# I have communicated several times with people there, and the last 850# time I had communications that was helpful was in 1998. Here is 851# what was said then: 852# 853# "The general rule was that Stanley used daylight saving and the Camp 854# did not. However for various reasons many people in the Camp have 855# started to use daylight saving (known locally as 'Stanley Time') 856# There is no rule as to who uses daylight saving - it is a matter of 857# personal choice and so it is impossible to draw a map showing who 858# uses it and who does not. Any list would be out of date as soon as 859# it was produced. This year daylight saving ended on April 18/19th 860# and started again on September 12/13th. I do not know what the rule 861# is, but can find out if you like. We do not change at the same time 862# as UK or Chile." 863# 864# I did have in my notes that the rule was "Second Saturday in Sep at 865# 0:00 until third Saturday in Apr at 0:00". I think that this does 866# not agree in some cases with Shanks; is this true? 867# 868# Also, there is no mention in the list that some areas in the 869# Falklands do not use DST. I have found in my communications there 870# that these areas are on the western half of East Falkland and all of 871# West Falkland. Stanley is the only place that consistently observes 872# DST. Again, as in other places in the world, the farmers don't like 873# it. West Falkland is almost entirely sheep farmers. 874# 875# I know one lady there that keeps a list of which farm keeps DST and 876# which doesn't each year. She runs a shop in Stanley, and says that 877# the list changes each year. She uses it to communicate to her 878# customers, catching them when they are home for lunch or dinner. 879 880# From Paul Eggert (2001-03-05): 881# For now, we'll just record the time in Stanley, since we have no 882# better info. 883 884# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 885Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S 886Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 - 887Rule Falk 1939 only - Oct 1 0:00 1:00 S 888Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S 889Rule Falk 1943 only - Jan 1 0:00 0 - 890Rule Falk 1983 only - Sep lastSun 0:00 1:00 S 891Rule Falk 1984 1985 - Apr lastSun 0:00 0 - 892Rule Falk 1984 only - Sep 16 0:00 1:00 S 893Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S 894Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 - 895Rule Falk 2001 max - Apr Sun>=15 2:00 0 - 896Rule Falk 2001 max - Sep Sun>=1 2:00 1:00 S 897# Zone NAME GMTOFF RULES FORMAT [UNTIL] 898Zone Atlantic/Stanley -3:51:24 - LMT 1890 899 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time 900 -4:00 Falk FK%sT 1983 May # Falkland Is Time 901 -3:00 Falk FK%sT 1985 Sep 15 902 -4:00 Falk FK%sT 903 904# French Guiana 905# Zone NAME GMTOFF RULES FORMAT [UNTIL] 906Zone America/Cayenne -3:29:20 - LMT 1911 Jul 907 -4:00 - GFT 1967 Oct # French Guiana Time 908 -3:00 - GFT 909 910# Guyana 911# Zone NAME GMTOFF RULES FORMAT [UNTIL] 912Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown 913 -3:45 - GBGT 1966 May 26 # Br Guiana Time 914 -3:45 - GYT 1975 Jul 31 # Guyana Time 915 -3:00 - GYT 1991 916# IATA SSIM (1996-06) says -4:00. Assume a 1991 switch. 917 -4:00 - GYT 918 919# Paraguay 920# From Paul Eggert (2006-03-22): 921# Shanks & Pottenger say that spring transitions are from 01:00 -> 02:00, 922# and autumn transitions are from 00:00 -> 23:00. Go with pre-1999 923# editions of Shanks, and with the IATA, who say transitions occur at 00:00. 924# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 925Rule Para 1975 1988 - Oct 1 0:00 1:00 S 926Rule Para 1975 1978 - Mar 1 0:00 0 - 927Rule Para 1979 1991 - Apr 1 0:00 0 - 928Rule Para 1989 only - Oct 22 0:00 1:00 S 929Rule Para 1990 only - Oct 1 0:00 1:00 S 930Rule Para 1991 only - Oct 6 0:00 1:00 S 931Rule Para 1992 only - Mar 1 0:00 0 - 932Rule Para 1992 only - Oct 5 0:00 1:00 S 933Rule Para 1993 only - Mar 31 0:00 0 - 934Rule Para 1993 1995 - Oct 1 0:00 1:00 S 935Rule Para 1994 1995 - Feb lastSun 0:00 0 - 936Rule Para 1996 only - Mar 1 0:00 0 - 937# IATA SSIM (2000-02) says 1999-10-10; ignore this for now. 938# From Steffen Thorsen (2000-10-02): 939# I have three independent reports that Paraguay changed to DST this Sunday 940# (10-01). 941# 942# Translated by Gwillim Law (2001-02-27) from 943# <a href="http://www.diarionoticias.com.py/011000/nacional/naciona1.htm"> 944# Noticias, a daily paper in Asuncion, Paraguay (2000-10-01) 945# </a>: 946# Starting at 0:00 today, the clock will be set forward 60 minutes, in 947# fulfillment of Decree No. 7,273 of the Executive Power.... The time change 948# system has been operating for several years. Formerly there was a separate 949# decree each year; the new law has the same effect, but permanently. Every 950# year, the time will change on the first Sunday of October; likewise, the 951# clock will be set back on the first Sunday of March. 952# 953Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S 954# IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger. 955Rule Para 1997 only - Feb lastSun 0:00 0 - 956# Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but 957# (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27). 958Rule Para 1998 2001 - Mar Sun>=1 0:00 0 - 959# From Rives McDow (2002-02-28): 960# A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the 961# dst method to be from the first Sunday in September to the first Sunday in 962# April. 963Rule Para 2002 2004 - Apr Sun>=1 0:00 0 - 964Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S 965# 966# From Jesper Norgaard Welen (2005-01-02): 967# There are several sources that claim that Paraguay made 968# a timezone rule change in autumn 2004. 969# From Steffen Thorsen (2005-01-05): 970# Decree 1,867 (2004-03-05) 971# From Carlos Raul Perasso via Jesper Norgaard Welen (2006-10-13) 972# <http://www.presidencia.gov.py/decretos/D1867.pdf> 973Rule Para 2004 max - Oct Sun>=15 0:00 1:00 S 974Rule Para 2005 max - Mar Sun>=8 0:00 0 - 975 976# Zone NAME GMTOFF RULES FORMAT [UNTIL] 977Zone America/Asuncion -3:50:40 - LMT 1890 978 -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time 979 -4:00 - PYT 1972 Oct # Paraguay Time 980 -3:00 - PYT 1974 Apr 981 -4:00 Para PY%sT 982 983# Peru 984# 985# <a href="news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net"> 986# From Evelyn C. Leeper via Mark Brader (2003-10-26):</a> 987# When we were in Peru in 1985-1986, they apparently switched over 988# sometime between December 29 and January 3 while we were on the Amazon. 989# 990# From Paul Eggert (2006-03-22): 991# Shanks & Pottenger don't have this transition. Assume 1986 was like 1987. 992 993# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 994Rule Peru 1938 only - Jan 1 0:00 1:00 S 995Rule Peru 1938 only - Apr 1 0:00 0 - 996Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S 997Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 - 998Rule Peru 1986 1987 - Jan 1 0:00 1:00 S 999Rule Peru 1986 1987 - Apr 1 0:00 0 - 1000Rule Peru 1990 only - Jan 1 0:00 1:00 S 1001Rule Peru 1990 only - Apr 1 0:00 0 - 1002# IATA is ambiguous for 1993/1995; go with Shanks & Pottenger. 1003Rule Peru 1994 only - Jan 1 0:00 1:00 S 1004Rule Peru 1994 only - Apr 1 0:00 0 - 1005# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1006Zone America/Lima -5:08:12 - LMT 1890 1007 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time? 1008 -5:00 Peru PE%sT # Peru Time 1009 1010# South Georgia 1011# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1012Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken 1013 -2:00 - GST # South Georgia Time 1014 1015# South Sandwich Is 1016# uninhabited; scientific personnel have wintered 1017 1018# Suriname 1019# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1020Zone America/Paramaribo -3:40:40 - LMT 1911 1021 -3:40:52 - PMT 1935 # Paramaribo Mean Time 1022 -3:40:36 - PMT 1945 Oct # The capital moved? 1023 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time 1024 -3:30 - SRT 1984 Oct # Suriname Time 1025 -3:00 - SRT 1026 1027# Trinidad and Tobago 1028# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1029Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2 1030 -4:00 - AST 1031 1032# Uruguay 1033# From Paul Eggert (1993-11-18): 1034# Uruguay wins the prize for the strangest peacetime manipulation of the rules. 1035# From Shanks & Pottenger: 1036# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1037# Whitman gives 1923 Oct 1; go with Shanks & Pottenger. 1038Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS 1039Rule Uruguay 1924 1926 - Apr 1 0:00 0 - 1040Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS 1041Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS 1042# Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman. 1043Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 - 1044Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS 1045Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 - 1046# Whitman gives 1937 Oct 3; go with Shanks & Pottenger. 1047Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS 1048# Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13, 1049# and 1943 Apr 13 ``to present time''; go with Shanks & Pottenger. 1050Rule Uruguay 1941 only - Aug 1 0:00 0:30 HS 1051Rule Uruguay 1942 only - Jan 1 0:00 0 - 1052Rule Uruguay 1942 only - Dec 14 0:00 1:00 S 1053Rule Uruguay 1943 only - Mar 14 0:00 0 - 1054Rule Uruguay 1959 only - May 24 0:00 1:00 S 1055Rule Uruguay 1959 only - Nov 15 0:00 0 - 1056Rule Uruguay 1960 only - Jan 17 0:00 1:00 S 1057Rule Uruguay 1960 only - Mar 6 0:00 0 - 1058Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S 1059Rule Uruguay 1965 only - Sep 26 0:00 0 - 1060Rule Uruguay 1966 1967 - Oct 31 0:00 0 - 1061Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS 1062Rule Uruguay 1968 1970 - Dec 2 0:00 0 - 1063Rule Uruguay 1972 only - Apr 24 0:00 1:00 S 1064Rule Uruguay 1972 only - Aug 15 0:00 0 - 1065Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS 1066Rule Uruguay 1974 only - Dec 22 0:00 1:00 S 1067Rule Uruguay 1976 only - Oct 1 0:00 0 - 1068Rule Uruguay 1977 only - Dec 4 0:00 1:00 S 1069Rule Uruguay 1978 only - Apr 1 0:00 0 - 1070Rule Uruguay 1979 only - Oct 1 0:00 1:00 S 1071Rule Uruguay 1980 only - May 1 0:00 0 - 1072Rule Uruguay 1987 only - Dec 14 0:00 1:00 S 1073Rule Uruguay 1988 only - Mar 14 0:00 0 - 1074Rule Uruguay 1988 only - Dec 11 0:00 1:00 S 1075Rule Uruguay 1989 only - Mar 12 0:00 0 - 1076Rule Uruguay 1989 only - Oct 29 0:00 1:00 S 1077# Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2, 1078# and that 1992/3's DST was from 10-25 to 03-01. Go with IATA. 1079Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 - 1080Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S 1081Rule Uruguay 1992 only - Oct 18 0:00 1:00 S 1082Rule Uruguay 1993 only - Feb 28 0:00 0 - 1083# From Eduardo Cota (2004-09-20): 1084# The uruguayan government has decreed a change in the local time.... 1085# http://www.presidencia.gub.uy/decretos/2004091502.htm 1086Rule Uruguay 2004 only - Sep 19 0:00 1:00 S 1087# From Steffen Thorsen (2005-03-11): 1088# Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to 1089# save energy ... it was postponed two weeks.... 1090# http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm 1091Rule Uruguay 2005 only - Mar 27 2:00 0 - 1092# From Eduardo Cota (2005-09-27): 1093# http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF 1094# This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at 1095# 02:00 local time, official time in Uruguay will be at GMT -2. 1096Rule Uruguay 2005 only - Oct 9 2:00 1:00 S 1097Rule Uruguay 2006 only - Mar 12 2:00 0 - 1098# From Jesper Norgaard Welen (2006-09-06): 1099# http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF 1100Rule Uruguay 2006 max - Oct Sun>=1 2:00 1:00 S 1101Rule Uruguay 2007 max - Mar Sun>=8 2:00 0 - 1102# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1103Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28 1104 -3:44:44 - MMT 1920 May 1 # Montevideo MT 1105 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time 1106 -3:00 Uruguay UY%sT 1107 1108# Venezuela 1109# 1110# From John Stainforth (2007-11-28): 1111# ... the change for Venezuela originally expected for 2007-12-31 has 1112# been brought forward to 2007-12-09. The official announcement was 1113# published today in the "Gaceta Oficial de la Republica Bolivariana 1114# de Venezuela, numero 38.819" (official document for all laws or 1115# resolution publication) 1116# http://www.globovision.com/news.php?nid=72208 1117 1118# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1119Zone America/Caracas -4:27:44 - LMT 1890 1120 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time? 1121 -4:30 - VET 1965 # Venezuela Time 1122 -4:00 - VET 2007 Dec 9 03:00 1123 -4:30 - VET 1124
