1# @(#)southamerica 7.59 2 3# This data is by no means authoritative; if you think you know better, 4# go ahead and edit the file (and please send any changes to 5# tz@elsie.nci.nih.gov for general use in the future). 6 7# From Paul Eggert <eggert@twinsun.com> (1999-07-07): 8# A good source for time zone historical data outside the U.S. is 9# Thomas G. Shanks, The International Atlas (5th edition), 10# San Diego: ACS Publications, Inc. (1999). 11# 12# Gwillim Law writes that a good source 13# for recent time zone data is the International Air Transport 14# Association's Standard Schedules Information Manual (IATA SSIM), 15# published semiannually. Law sent in several helpful summaries 16# of the IATA's data after 1990. 17# 18# Except where otherwise noted, Shanks is the source for entries through 1990, 19# and IATA SSIM is the source for entries after 1990. 20# 21# Earlier editions of these tables used the North American style (e.g. ARST and 22# ARDT for Argentine Standard and Daylight Time), but the following quote 23# suggests that it's better to use European style (e.g. ART and ARST). 24# I suggest the use of _Summer time_ instead of the more cumbersome 25# _daylight-saving time_. _Summer time_ seems to be in general use 26# in Europe and South America. 27# -- E O Cutler, _New York Times_ (1937-02-14), quoted in 28# H L Mencken, _The American Language: Supplement I_ (1960), p 466 29# 30# Earlier editions of these tables also used the North American style 31# for time zones in Brazil, but this was incorrect, as Brazilians say 32# "summer time". Reinaldo Goulart, a Sao Paulo businessman active in 33# the railroad sector, writes (1999-07-06): 34# The subject of time zones is currently a matter of discussion/debate in 35# Brazil. Let's say that "the Brasilia time" is considered the 36# "official time" because Brasilia is the capital city. 37# The other three time zones are called "Brasilia time "minus one" or 38# "plus one" or "plus two". As far as I know there is no such 39# name/designation as "Eastern Time" or "Central Time". 40# So I invented the following (English-language) abbreviations for now. 41# Corrections are welcome! 42# std dst 43# -2:00 FNT FNST Fernando de Noronha 44# -3:00 BRT BRST Brasilia 45# -4:00 AMT AMST Amazon 46# -5:00 ACT ACST Acre 47 48############################################################################### 49 50############################################################################### 51 52# Argentina 53 54# From Bob Devine (1988-01-28): 55# Argentina: first Sunday in October to first Sunday in April since 1976. 56# Double Summer time from 1969 to 1974. Switches at midnight. 57 58# From U. S. Naval Observatory (1988-01-199): 59# ARGENTINA 3 H BEHIND UTC 60 61# From Hernan G. Otero <hernan@isoft.com.ar> (1995-06-26): 62# I am sending modifications to the Argentine time zone table... 63# AR was chosen because they are the ISO letters that represent Argentina. 64 65# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 66Rule Arg 1930 only - Dec 1 0:00 1:00 S 67Rule Arg 1931 only - Apr 1 0:00 0 - 68Rule Arg 1931 only - Oct 15 0:00 1:00 S 69Rule Arg 1932 1940 - Mar 1 0:00 0 - 70Rule Arg 1932 1939 - Nov 1 0:00 1:00 S 71Rule Arg 1940 only - Jul 1 0:00 1:00 S 72Rule Arg 1941 only - Jun 15 0:00 0 - 73Rule Arg 1941 only - Oct 15 0:00 1:00 S 74Rule Arg 1943 only - Aug 1 0:00 0 - 75Rule Arg 1943 only - Oct 15 0:00 1:00 S 76Rule Arg 1946 only - Mar 1 0:00 0 - 77Rule Arg 1946 only - Oct 1 0:00 1:00 S 78Rule Arg 1963 only - Oct 1 0:00 0 - 79Rule Arg 1963 only - Dec 15 0:00 1:00 S 80Rule Arg 1964 1966 - Mar 1 0:00 0 - 81Rule Arg 1964 1966 - Oct 15 0:00 1:00 S 82Rule Arg 1967 only - Apr 2 0:00 0 - 83Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S 84Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 - 85Rule Arg 1974 only - Jan 23 0:00 1:00 S 86Rule Arg 1974 only - May 1 0:00 0 - 87Rule Arg 1988 only - Dec 1 0:00 1:00 S 88# 89# From Hernan G. Otero <hernan@isoft.com.ar> (1995-06-26): 90# These corrections were contributed by InterSoft Argentina S.A., 91# obtaining the data from the: 92# Talleres de Hidrografia Naval Argentina 93# (Argentine Naval Hydrography Institute) 94# 95# Shanks stops after 1992-03-01; go with Otero. 96Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 - 97Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S 98# 99# From Hernan G. Otero <hernan@isoft.com.ar> (1995-06-26): 100# From this moment on, the law that mandated the daylight saving 101# time corrections was derogated and no more modifications 102# to the time zones (for daylight saving) are now made. 103# 104# From Rives McDow (2000-01-10): 105# On October 3, 1999, 0:00 local, Argentina implemented daylight savings time, 106# which did not result in the switch of a time zone, as they stayed 9 hours 107# from the International Date Line. 108Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S 109Rule Arg 2000 only - Mar Sun>=1 0:00 0 - 110# 111# From Peter Gradelski via Steffen Thorsen (2000-03-01): 112# We just checked with our Sao Paulo office and they say the government of 113# Argentina decided not to become one of the countries that go on or off DST. 114# So Buenos Aires should be -3 hours from GMT at all times. 115# 116# From Fabian L. Arce Jofre <farcejofre@bigfoot.com> (2000-04-04): 117# The law that claimed DST for Argentina was derogated by President Fernando 118# de la Rua on March 2, 2000, because it would make people spend more energy 119# in the winter time, rather than less. The change took effect on March 3. 120# 121# From Mariano Absatz (2001-06-06): 122# one of the major newspapers here in Argentina said that the 1999 123# Timezone Law (which never was effectively applied) will (would?) be 124# in effect.... The article is at 125# http://ar.clarin.com/diario/2001-06-06/e-01701.htm 126# ... The Law itself is "Ley No 25155", sanctioned on 1999-08-25, enacted 127# 1999-09-17, and published 1999-09-21. The official publication is at: 128# http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF 129# Regretfully, you have to subscribe (and pay) for the on-line version.... 130# 131# (2001-06-12): 132# the timezone for Argentina will not change next Sunday. 133# Apparently it will do so on Sunday 24th.... 134# http://ar.clarin.com/diario/2001-06-12/s-03501.htm 135# 136# (2001-06-25): 137# Last Friday (yes, the last working day before the date of the change), the 138# Senate annulled the 1999 law that introduced the changes later postponed. 139# http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm 140# It remains the vote of the Deputies..., but it will be the same.... 141# This kind of things had always been done this way in Argentina. 142# We are still -03:00 all year round in all of the country. 143# 144# From Mariano Absatz (2004-05-21): 145# Today it was officially published that the Province of Mendoza is changing 146# its timezone this winter... starting tomorrow night.... 147# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf 148# From Paul Eggert (2004-05-24): 149# It's Law No. 7,210. This change is due to a public power emergency, so for 150# now we'll assume it's for this year only. 151# 152# From Paul Eggert (2002-01-22): 153# <a href="http://www.spicasc.net/horvera.html"> 154# Hora de verano para la Republica Argentina (2000-10-01) 155# </a> says that standard time in Argentina from 1894-10-31 156# to 1920-05-01 was -4:16:48.25. Go with this more-precise value 157# over Shanks. 158# 159# From Mariano Absatz (2004-06-05): 160# These media articles from a major newspaper mostly cover the current state: 161# http://www.lanacion.com.ar/04/05/27/de_604825.asp 162# http://www.lanacion.com.ar/04/05/28/de_605203.asp 163# 164# The following eight (8) provinces pulled clocks back to UTC-04:00 at 165# midnight Monday May 31st. (that is, the night between 05/31 and 06/01). 166# Apparently, all nine provinces would go back to UTC-03:00 at the same 167# time in October 17th. 168# 169# Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz, 170# Tierra del Fuego, Tucuman. 171# 172# From Mariano Absatz (2004-06-14): 173# ... this weekend, the Province of Tucuman decided it'd go back to UTC-03:00 174# yesterday midnight (that is, at 24:00 Saturday 12th), since the people's 175# annoyance with the change is much higher than the power savings obtained.... 176# 177# From Gwillim Law (2004-06-14): 178# http://www.lanacion.com.ar/04/06/10/de_609078.asp ... 179# "The time change in Tierra del Fuego was a conflicted decision from 180# the start. The government had decreed that the measure would take 181# effect on June 1, but a normative error forced the new time to begin 182# three days earlier, from a Saturday to a Sunday.... 183# Our understanding was that the change was originally scheduled to take place 184# on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other 185# provinces). Sunday was May 30, only two days earlier. So the article 186# contains a contradiction. I would give more credence to the Saturday/Sunday 187# date than the "three days earlier" phrase, and conclude that Tierra del 188# Fuego set its clocks back at 2004-05-30 00:00. 189# 190# From Steffen Thorsen (2004-10-05): 191# The previous law 7210 which changed the province of Mendoza's time zone 192# back in May have been modified slightly in a new law 7277, which set the 193# new end date to 2004-09-26 (original date was 2004-10-17). 194# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf 195# 196# From Mariano Absatz (2004-10-05): 197# San Juan changed from UTC-03:00 to UTC-04:00 at midnight between 198# Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00 199# at midnight between Saturday, July 24th and Sunday, July 25th.... 200# http://www.sanjuan.gov.ar/prensa/archivo/000329.html 201# http://www.sanjuan.gov.ar/prensa/archivo/000426.html 202# http://www.sanjuan.gov.ar/prensa/archivo/000441.html 203 204# Unless otherwise specified, data are from Shanks through 1992, from 205# the IATA otherwise. As noted below, Shanks says that 206# America/Cordoba split into 6 subregions during 1991/1992, but we 207# haven't verified this yet so for now we'll keep it a single region. 208# 209# Zone NAME GMTOFF RULES FORMAT [UNTIL] 210# 211# Buenos Aires (BA), Capital Federal (CF), 212Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31 213 -4:16:48 - CMT 1920 May # Cordoba Mean Time 214 -4:00 - ART 1930 Dec 215 -4:00 Arg AR%sT 1969 Oct 5 216 -3:00 Arg AR%sT 1999 Oct 3 217 -4:00 Arg AR%sT 2000 Mar 3 218 -3:00 - ART 219# 220# Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN), Chaco (CC), 221# Formosa (FM), Salta (SA), Santiago del Estero (SE), Cordoba (CB), 222# San Luis (SL), La Pampa (LP), Neuquen (NQ), Rio Negro (RN) 223# 224# Shanks also makes the following claims, which we haven't verified: 225# - Formosa switched to -3:00 on 1991-01-07. 226# - Misiones switched to -3:00 on 1990-12-29. 227# - Chaco switched to -3:00 on 1991-01-04. 228# - San Luis switched to -4:00 on 1990-03-14, then to -3:00 on 1990-10-15, 229# then to -4:00 on 1991-03-01, then to -3:00 on 1991-06-01. 230# - Santiago del Estero switched to -4:00 on 1991-04-01, 231# then to -3:00 on 1991-04-26. 232# 233Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31 234 -4:16:48 - CMT 1920 May 235 -4:00 - ART 1930 Dec 236 -4:00 Arg AR%sT 1969 Oct 5 237 -3:00 Arg AR%sT 1991 Mar 3 238 -4:00 - WART 1991 Oct 20 239 -3:00 Arg AR%sT 1999 Oct 3 240 -4:00 Arg AR%sT 2000 Mar 3 241 -3:00 - ART 242# 243# Tucuman (TM) 244Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31 245 -4:16:48 - CMT 1920 May 246 -4:00 - ART 1930 Dec 247 -4:00 Arg AR%sT 1969 Oct 5 248 -3:00 Arg AR%sT 1991 Mar 3 249 -4:00 - WART 1991 Oct 20 250 -3:00 Arg AR%sT 1999 Oct 3 251 -4:00 Arg AR%sT 2000 Mar 3 252 -3:00 - ART 2004 Jun 1 253 -4:00 - WART 2004 Jun 13 254 -3:00 - ART 255# 256# La Rioja (LR) 257Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31 258 -4:16:48 - CMT 1920 May 259 -4:00 - ART 1930 Dec 260 -4:00 Arg AR%sT 1969 Oct 5 261 -3:00 Arg AR%sT 1991 Mar 1 262 -4:00 - WART 1991 May 7 263 -3:00 Arg AR%sT 1999 Oct 3 264 -4:00 Arg AR%sT 2000 Mar 3 265 -3:00 - ART 2004 Jun 1 266 -4:00 - WART 2004 Jun 20 267 -3:00 - ART 268# 269# San Juan (SJ) 270Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31 271 -4:16:48 - CMT 1920 May 272 -4:00 - ART 1930 Dec 273 -4:00 Arg AR%sT 1969 Oct 5 274 -3:00 Arg AR%sT 1991 Mar 1 275 -4:00 - WART 1991 May 7 276 -3:00 Arg AR%sT 1999 Oct 3 277 -4:00 Arg AR%sT 2000 Mar 3 278 -3:00 - ART 2004 May 31 279 -4:00 - WART 2004 Jul 25 280 -3:00 - ART 281# 282# Jujuy (JY) 283Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31 284 -4:16:48 - CMT 1920 May 285 -4:00 - ART 1930 Dec 286 -4:00 Arg AR%sT 1969 Oct 5 287 -3:00 Arg AR%sT 1990 Mar 4 288 -4:00 - WART 1990 Oct 28 289 -4:00 1:00 WARST 1991 Mar 17 290 -4:00 - WART 1991 Oct 6 291 -3:00 1:00 ARST 1992 292 -3:00 Arg AR%sT 1999 Oct 3 293 -4:00 Arg AR%sT 2000 Mar 3 294 -3:00 - ART 295# 296# Catamarca (CT) 297Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31 298 -4:16:48 - CMT 1920 May 299 -4:00 - ART 1930 Dec 300 -4:00 Arg AR%sT 1969 Oct 5 301 -3:00 Arg AR%sT 1991 Mar 3 302 -4:00 - WART 1991 Oct 20 303 -3:00 Arg AR%sT 1999 Oct 3 304 -4:00 Arg AR%sT 2000 Mar 3 305 -3:00 - ART 2004 Jun 1 306 -4:00 - WART 2004 Jun 20 307 -3:00 - ART 308# 309# Mendoza (MZ) 310Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31 311 -4:16:48 - CMT 1920 May 312 -4:00 - ART 1930 Dec 313 -4:00 Arg AR%sT 1969 Oct 5 314 -3:00 Arg AR%sT 1990 Mar 4 315 -4:00 - WART 1990 Oct 15 316 -4:00 1:00 WARST 1991 Mar 1 317 -4:00 - WART 1991 Oct 15 318 -4:00 1:00 WARST 1992 Mar 1 319 -4:00 - WART 1992 Oct 18 320 -3:00 Arg AR%sT 1999 Oct 3 321 -4:00 Arg AR%sT 2000 Mar 3 322 -3:00 - ART 2004 May 23 323 -4:00 - WART 2004 Sep 26 324 -3:00 - ART 325# 326# Chubut (CH) 327# The name "Comodoro Rivadavia" exceeds the 14-byte POSIX limit. 328Zone America/Argentina/ComodRivadavia -4:30:00 - LMT 1894 Oct 31 329 -4:16:48 - CMT 1920 May 330 -4:00 - ART 1930 Dec 331 -4:00 Arg AR%sT 1969 Oct 5 332 -3:00 Arg AR%sT 1991 Mar 3 333 -4:00 - WART 1991 Oct 20 334 -3:00 Arg AR%sT 1999 Oct 3 335 -4:00 Arg AR%sT 2000 Mar 3 336 -3:00 - ART 2004 Jun 1 337 -4:00 - WART 2004 Jun 20 338 -3:00 - ART 339# 340# Santa Cruz (SC) 341Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31 342 -4:16:48 - CMT 1920 May # Cordoba Mean Time 343 -4:00 - ART 1930 Dec 344 -4:00 Arg AR%sT 1969 Oct 5 345 -3:00 Arg AR%sT 1999 Oct 3 346 -4:00 Arg AR%sT 2000 Mar 3 347 -3:00 - ART 2004 Jun 1 348 -4:00 - WART 2004 Jun 20 349 -3:00 - ART 350# 351# Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF) 352Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31 353 -4:16:48 - CMT 1920 May # Cordoba Mean Time 354 -4:00 - ART 1930 Dec 355 -4:00 Arg AR%sT 1969 Oct 5 356 -3:00 Arg AR%sT 1999 Oct 3 357 -4:00 Arg AR%sT 2000 Mar 3 358 -3:00 - ART 2004 May 30 359 -4:00 - WART 2004 Jun 20 360 -3:00 - ART 361 362# Aruba 363# Zone NAME GMTOFF RULES FORMAT [UNTIL] 364Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad 365 -4:30 - ANT 1965 # Netherlands Antilles Time 366 -4:00 - AST 367 368# Bolivia 369# Zone NAME GMTOFF RULES FORMAT [UNTIL] 370Zone America/La_Paz -4:32:36 - LMT 1890 371 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT 372 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST 373 -4:00 - BOT # Bolivia Time 374 375# Brazil 376 377# From Paul Eggert <eggert@twinsun.com> (1993-11-18): 378# The mayor of Rio recently attempted to change the time zone rules 379# just in his city, in order to leave more summer time for the tourist trade. 380# The rule change lasted only part of the day; 381# the federal government refused to follow the city's rules, and business 382# was in a chaos, so the mayor backed down that afternoon. 383 384# From IATA SSIM (1996-02): 385# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS), 386# Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ), 387# Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO), 388# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL]. 389# [The last three states are new to this issue of the IATA SSIM.] 390 391# From Gwillim Law (1996-10-07): 392# Geography, history (Tocantins was part of Goias until 1989), and other 393# sources of time zone information lead me to believe that AL, SE, and TO were 394# always in BR1, and so the only change was whether or not they observed DST.... 395# The earliest issue of the SSIM I have is 2/91. Each issue from then until 396# 9/95 says that DST is observed only in the ten states I quoted from 9/95, 397# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2 398# (UTC-4).... The other two time zones given for Brazil are BR3, which is 399# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is 400# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's 401# become part of the state of Pernambuco). The boundary between BR1 and BR2 402# has never been clearly stated. They've simply been called East and West. 403# However, some conclusions can be drawn from another IATA manual: the Airline 404# Coding Directory, which lists close to 400 airports in Brazil. For each 405# airport it gives a time zone which is coded to the SSIM. From that 406# information, I'm led to conclude that the states of Amapa (AP), Ceara (CE), 407# Maranhao (MA), Paraiba (PR), Pernambuco (PE), Piaui (PI), and Rio Grande do 408# Norte (RN), and the eastern part of Para (PA) are all in BR1 without DST. 409 410# From Marcos Tadeu (1998-09-27): 411# <a href="http://pcdsh01.on.br/verao1.html"> 412# Brazilian official page 413# </a> 414 415# From Jesper Norgaard (2000-11-03): 416# [For an official list of which regions in Brazil use which time zones, see:] 417# http://pcdsh01.on.br/Fusbr.htm 418# http://pcdsh01.on.br/Fusbrhv.htm 419 420# From Celso Doria via David Madeo (2002-10-09): 421# The reason for the delay this year has to do with elections in Brazil. 422# 423# Unlike in the United States, elections in Brazil are 100% computerized and 424# the results are known almost immediately. Yesterday, it was the first 425# round of the elections when 115 million Brazilians voted for President, 426# Governor, Senators, Federal Deputies, and State Deputies. Nobody is 427# counting (or re-counting) votes anymore and we know there will be a second 428# round for the Presidency and also for some Governors. The 2nd round will 429# take place on October 27th. 430# 431# The reason why the DST will only begin November 3rd is that the thousands 432# of electoral machines used cannot have their time changed, and since the 433# Constitution says the elections must begin at 8:00 AM and end at 5:00 PM, 434# the Government decided to postpone DST, instead of changing the Constitution 435# (maybe, for the next elections, it will be possible to change the clock)... 436 437# From Rodrigo Severo (2004-10-04): 438# It's just the biannual change made necessary by the much hyped, supposedly 439# modern Brazilian eletronic voting machines which, apparently, can't deal 440# with a time change between the first and the second rounds of the elections. 441 442# From Paul Eggert (2002-10-10): 443# The official decrees referenced below are mostly taken from 444# <a href="http://pcdsh01.on.br/DecHV.html"> 445# Decretos sobre o Horario de Verao no Brasil 446# </a> (2001-09-20, in Portuguese). 447# The official site for all decrees, including those not related to time, is 448# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/principal_ano.htm"> 449# Presidencia da Republica, Subchefia para Assuntos Juridicos, Decretos 450# </a> (in Portuguese). 451 452# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 453# Decree <a href="http://pcdsh01.on.br/HV20466.htm">20,466</a> (1931-10-01) 454# Decree <a href="http://pcdsh01.on.br/HV21896.htm">21,896</a> (1932-01-10) 455Rule Brazil 1931 only - Oct 3 11:00 1:00 S 456Rule Brazil 1932 1933 - Apr 1 0:00 0 - 457Rule Brazil 1932 only - Oct 3 0:00 1:00 S 458# Decree <a href="http://pcdsh01.on.br/HV23195.htm">23,195</a> (1933-10-10) 459# revoked DST. 460# Decree <a href="http://pcdsh01.on.br/HV27496.htm">27,496</a> (1949-11-24) 461# Decree <a href="http://pcdsh01.on.br/HV27998.htm">27,998</a> (1950-04-13) 462Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S 463Rule Brazil 1950 only - Apr 16 1:00 0 - 464Rule Brazil 1951 1952 - Apr 1 0:00 0 - 465# Decree <a href="http://pcdsh01.on.br/HV32308.htm">32,308</a> (1953-02-24) 466Rule Brazil 1953 only - Mar 1 0:00 0 - 467# Decree <a href="http://pcdsh01.on.br/HV34724.htm">34,724</a> (1953-11-30) 468# revoked DST. 469# Decree <a href="http://pcdsh01.on.br/HV52700.htm">52,700</a> (1963-10-18) 470# established DST from 1963-10-23 00:00 to 1964-02-29 00:00 471# in SP, RJ, GB, MG, ES, due to the prolongation of the drought. 472# Decree <a href="http://pcdsh01.on.br/HV53071.htm">53,071</a> (1963-12-03) 473# extended the above decree to all of the national territory on 12-09. 474Rule Brazil 1963 only - Dec 9 0:00 1:00 S 475# Decree <a href="http://pcdsh01.on.br/HV53604.htm">53,604</a> (1964-02-25) 476# extended summer time by one day to 1964-03-01 00:00 (start of school). 477Rule Brazil 1964 only - Mar 1 0:00 0 - 478# Decree <a href="http://pcdsh01.on.br/HV55639.htm">55,639</a> (1965-01-27) 479Rule Brazil 1965 only - Jan 31 0:00 1:00 S 480Rule Brazil 1965 only - Mar 31 0:00 0 - 481# Decree <a href="http://pcdsh01.on.br/HV57303.htm">57,303</a> (1965-11-22) 482Rule Brazil 1965 only - Dec 1 0:00 1:00 S 483# Decree <a href="http://pcdsh01.on.br/HV57843.htm">57,843</a> (1966-02-18) 484Rule Brazil 1966 1968 - Mar 1 0:00 0 - 485Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S 486# Decree <a href="http://pcdsh01.on.br/HV63429.htm">63,429</a> (1968-10-15) 487# revoked DST. 488# Decree <a href="http://pcdsh01.on.br/HV91698.htm">91,698</a> (1985-09-27) 489Rule Brazil 1985 only - Nov 2 0:00 1:00 S 490# Decree 92,310 (1986-01-21) 491# Decree 92,463 (1986-03-13) 492Rule Brazil 1986 only - Mar 15 0:00 0 - 493# Decree 93,316 (1986-10-01) 494Rule Brazil 1986 only - Oct 25 0:00 1:00 S 495Rule Brazil 1987 only - Feb 14 0:00 0 - 496# Decree <a href="http://pcdsh01.on.br/HV94922.htm">94,922</a> (1987-09-22) 497Rule Brazil 1987 only - Oct 25 0:00 1:00 S 498Rule Brazil 1988 only - Feb 7 0:00 0 - 499# Decree <a href="http://pcdsh01.on.br/HV96676.htm">96,676</a> (1988-09-12) 500# except for the states of AC, AM, PA, RR, RO, and AP (then a territory) 501Rule Brazil 1988 only - Oct 16 0:00 1:00 S 502Rule Brazil 1989 only - Jan 29 0:00 0 - 503# Decree <a href="http://pcdsh01.on.br/HV98077.htm">98,077</a> (1989-08-21) 504# with the same exceptions 505Rule Brazil 1989 only - Oct 15 0:00 1:00 S 506Rule Brazil 1990 only - Feb 11 0:00 0 - 507# Decree <a href="http://pcdsh01.on.br/HV99530.htm">99,530</a> (1990-09-17) 508# adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF. 509# Decree 99,629 (1990-10-19) adds BA, MT. 510Rule Brazil 1990 only - Oct 21 0:00 1:00 S 511Rule Brazil 1991 only - Feb 17 0:00 0 - 512# <a href="http://pcdsh01.on.br/HV1991.htm">Unnumbered decree</a> (1991-09-25) 513# adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF. 514Rule Brazil 1991 only - Oct 20 0:00 1:00 S 515Rule Brazil 1992 only - Feb 9 0:00 0 - 516# <a href="http://pcdsh01.on.br/HV1992.htm">Unnumbered decree</a> (1992-10-16) 517# adopted by same states. 518Rule Brazil 1992 only - Oct 25 0:00 1:00 S 519Rule Brazil 1993 only - Jan 31 0:00 0 - 520# Decree <a href="http://pcdsh01.on.br/HV942.htm">942</a> (1993-09-28) 521# adopted by same states, plus AM. 522# Decree <a href="http://pcdsh01.on.br/HV1252.htm">1,252</a> (1994-09-22; 523# web page corrected 2004-01-07) adopted by same states, minus AM. 524# Decree <a href="http://pcdsh01.on.br/HV1636.htm">1,636</a> (1995-09-14) 525# adopted by same states, plus MT and TO. 526# Decree <a href="http://pcdsh01.on.br/HV1674.htm">1,674</a> (1995-10-13) 527# adds AL, SE. 528Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S 529Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 - 530Rule Brazil 1996 only - Feb 11 0:00 0 - 531# Decree <a href="http://pcdsh01.on.br/HV2000.htm">2,000</a> (1996-09-04) 532# adopted by same states, minus AL, SE. 533Rule Brazil 1996 only - Oct 6 0:00 1:00 S 534Rule Brazil 1997 only - Feb 16 0:00 0 - 535# From Daniel C. Sobral <dcs@gns.com.br> (1998-02-12): 536# In 1997, the DS began on October 6. The stated reason was that 537# because international television networks ignored Brazil's policy on DS, 538# they bought the wrong times on satellite for coverage of Pope's visit. 539# This year, the ending date of DS was postponed to March 1 540# to help dealing with the shortages of electric power. 541# 542# From Paul Eggert (1998-02-25): 543# <a href="http://churchnet.ucsm.ac.uk/news/files2/news165.htm"> 544# Brazil Prepares for Papal Visit 545# </a>, 546# Church Net UK (1997-10-02). 547# 548# Decree 2,317 (1997-09-04), adopted by same states. 549Rule Brazil 1997 only - Oct 6 0:00 1:00 S 550# Decree <a href="http://pcdsh01.on.br/figuras/HV2495.JPG">2,495</a> 551# (1998-02-10) 552Rule Brazil 1998 only - Mar 1 0:00 0 - 553# Decree <a href="http://pcdsh01.on.br/figuras/Hv98.jpg">2,780</a> (1998-09-11) 554# adopted by the same states as before. 555Rule Brazil 1998 only - Oct 11 0:00 1:00 S 556Rule Brazil 1999 only - Feb 21 0:00 0 - 557# Decree <a href="http://pcdsh01.on.br/figuras/HV3150.gif">3,150</a> 558# (1999-08-23) adopted by same states. 559# Decree <a href="http://pcdsh01.on.br/DecHV99.gif">3,188</a> (1999-09-30) 560# adds SE, AL, PB, PE, RN, CE, PI, MA and RR. 561Rule Brazil 1999 only - Oct 3 0:00 1:00 S 562Rule Brazil 2000 only - Feb 27 0:00 0 - 563# Decree <a href="http://pcdsh01.on.br/DEC3592.htm">3,592</a> (2000-09-06) 564# adopted by the same states as before. 565# Decree <a href="http://pcdsh01.on.br/Dec3630.jpg">3,630</a> (2000-10-13) 566# repeals DST in PE and RR, effective 2000-10-15 00:00. 567# Decree <a href="http://pcdsh01.on.br/Dec3632.jpg">3,632</a> (2000-10-17) 568# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00. 569# Decree <a href="http://pcdsh01.on.br/figuras/HV3916.gif">3,916</a> 570# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE. 571Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S 572Rule Brazil 2001 max - Feb Sun>=15 0:00 0 - 573# Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE. 574# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm"></a> 575Rule Brazil 2002 only - Nov 3 0:00 1:00 S 576# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO. 577# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm"></a> 578Rule Brazil 2003 only - Oct 19 0:00 1:00 S 579# Decree 5,223 (2004-10-01) reestablishes DST in MT. 580# <a href="http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm"></a> 581Rule Brazil 2004 only - Nov 2 0:00 1:00 S 582# The latest ruleset listed above says that the following states observe DST: 583# DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP. 584# 585Rule Brazil 2005 max - Oct Sun>=15 0:00 1:00 S 586# For dates after mid-2005, the above rules with TO="max" are guesses 587# and are quite possibly wrong, but are more likely than no DST at all. 588 589 590# Zone NAME GMTOFF RULES FORMAT [UNTIL] 591# 592# Fernando de Noronha (administratively part of PE) 593Zone America/Noronha -2:09:40 - LMT 1914 594 -2:00 Brazil FN%sT 1990 Sep 17 595 -2:00 - FNT 1999 Sep 30 596 -2:00 Brazil FN%sT 2000 Oct 15 597 -2:00 - FNT 2001 Sep 13 598 -2:00 Brazil FN%sT 2002 Oct 1 599 -2:00 - FNT 600# Other Atlantic islands have no permanent settlement. 601# These include Trindade and Martin Vaz (administratively part of ES), 602# Atol das Rocas (RN), and Penedos de Sao Pedro e Sao Paulo (PE). 603# Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01; 604# it also included the Penedos. 605# 606# Amapa (AP), east Para (PA) 607# East Para includes Belem, Maraba, Serra Norte, and Sao Felix do Xingu. 608# The division between east and west Para is the river Xingu. 609# In the north a very small part from the river Javary (now Jari I guess, 610# the border with Amapa) to the Amazon, then to the Xingu. 611Zone America/Belem -3:13:56 - LMT 1914 612 -3:00 Brazil BR%sT 1988 Sep 12 613 -3:00 - BRT 614# 615# Maranhao (MA), Piaui (PI), Ceara (CE), Rio Grande do Norte (RN), 616# Paraiba (PB) 617Zone America/Fortaleza -2:34:00 - LMT 1914 618 -3:00 Brazil BR%sT 1990 Sep 17 619 -3:00 - BRT 1999 Sep 30 620 -3:00 Brazil BR%sT 2000 Oct 22 621 -3:00 - BRT 2001 Sep 13 622 -3:00 Brazil BR%sT 2002 Oct 1 623 -3:00 - BRT 624# 625# Pernambuco (PE) (except Atlantic islands) 626Zone America/Recife -2:19:36 - LMT 1914 627 -3:00 Brazil BR%sT 1990 Sep 17 628 -3:00 - BRT 1999 Sep 30 629 -3:00 Brazil BR%sT 2000 Oct 15 630 -3:00 - BRT 2001 Sep 13 631 -3:00 Brazil BR%sT 2002 Oct 1 632 -3:00 - BRT 633# 634# Tocantins (TO) 635Zone America/Araguaina -3:12:48 - LMT 1914 636 -3:00 Brazil BR%sT 1990 Sep 17 637 -3:00 - BRT 1995 Sep 14 638 -3:00 Brazil BR%sT 2003 Sep 24 639 -3:00 - BRT 640# 641# Alagoas (AL), Sergipe (SE) 642Zone America/Maceio -2:22:52 - LMT 1914 643 -3:00 Brazil BR%sT 1990 Sep 17 644 -3:00 - BRT 1995 Oct 13 645 -3:00 Brazil BR%sT 1996 Sep 4 646 -3:00 - BRT 1999 Sep 30 647 -3:00 Brazil BR%sT 2000 Oct 22 648 -3:00 - BRT 2001 Sep 13 649 -3:00 Brazil BR%sT 2002 Oct 1 650 -3:00 - BRT 651# 652# Bahia (BA) 653# There are too many Salvadors elsewhere, so use America/Bahia instead 654# of America/Salvador. 655Zone America/Bahia -2:34:04 - LMT 1914 656 -3:00 Brazil BR%sT 2003 Sep 24 657 -3:00 - BRT 658# 659# Goias (GO), Distrito Federal (DF), Minas Gerais (MG), 660# Espirito Santo (ES), Rio de Janeiro (RJ), Sao Paulo (SP), Parana (PR), 661# Santa Catarina (SC), Rio Grande do Sul (RS) 662Zone America/Sao_Paulo -3:06:28 - LMT 1914 663 -3:00 Brazil BR%sT 1963 Oct 23 00:00 664 -3:00 1:00 BRST 1964 665 -3:00 Brazil BR%sT 666# 667# Mato Grosso do Sul (MS) 668Zone America/Campo_Grande -3:38:28 - LMT 1914 669 -4:00 Brazil AM%sT 670# 671# Mato Grosso (MT) 672Zone America/Cuiaba -3:44:20 - LMT 1914 673 -4:00 Brazil AM%sT 2003 Sep 24 674 -4:00 - AMT 2004 Oct 1 675 -4:00 Brazil AM%sT 676# 677# west Para (PA), Rondonia (RO) 678# West Para includes Altamira, Oribidos, Prainha, Oriximina, and Santarem. 679Zone America/Porto_Velho -4:15:36 - LMT 1914 680 -4:00 Brazil AM%sT 1988 Sep 12 681 -4:00 - AMT 682# 683# Roraima (RR) 684Zone America/Boa_Vista -4:02:40 - LMT 1914 685 -4:00 Brazil AM%sT 1988 Sep 12 686 -4:00 - AMT 1999 Sep 30 687 -4:00 Brazil AM%sT 2000 Oct 15 688 -4:00 - AMT 689# 690# east Amazonas (AM): Boca do Acre, Jutai, Manaus, Floriano Peixoto 691# The great circle line from Tabatinga to Porto Acre divides 692# east from west Amazonas. 693Zone America/Manaus -4:00:04 - LMT 1914 694 -4:00 Brazil AM%sT 1988 Sep 12 695 -4:00 - AMT 1993 Sep 28 696 -4:00 Brazil AM%sT 1994 Sep 22 697 -4:00 - AMT 698# 699# west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant, 700# Eirunepe, Envira, Ipixuna 701Zone America/Eirunepe -4:39:28 - LMT 1914 702 -5:00 Brazil AC%sT 1988 Sep 12 703 -5:00 - ACT 1993 Sep 28 704 -5:00 Brazil AC%sT 1994 Sep 22 705 -5:00 - ACT 706# 707# Acre (AC) 708Zone America/Rio_Branco -4:31:12 - LMT 1914 709 -5:00 Brazil AC%sT 1988 Sep 12 710 -5:00 - ACT 711 712 713# Chile 714 715# From Eduardo Krell (1995-10-19): 716# The law says to switch to DST at midnight [24:00] on the second SATURDAY 717# of October.... The law is the same for March and October. 718# (1998-09-29): 719# Because of the drought this year, the government decided to go into 720# DST earlier (saturday 9/26 at 24:00). This is a one-time change only ... 721# (unless there's another dry season next year, I guess). 722 723# From Julio I. Pacheco Troncoso (1999-03-18): 724# Because of the same drought, the government decided to end DST later, 725# on April 3, (one-time change). 726 727# From Gwillim Law (2001-05-04): 728# I came across another article in "La Tercera" about Chilean DST. 729# <http://www.tercera.cl/diario/2000/10/13/t-extras.html> 730# It clearly confirms my earlier suggestion, that DST begins at 22:00 731# on Easter Island.... But it also seems to be saying that the 732# observance of DST in Chile began in 1966, rather than 1969 as 733# ... [Shanks] has it.... 734# 735# My translation: 736# 737# "The Chilean Army has announced that summer time will begin tomorrow, 738# Saturday, October 14 in continental Chile, insular Chile, and 739# Antarctica, as provided by Supreme Decree 25 of January 11, 1966. 740# By the preceding, official time in continental Chile and Chilean 741# Antarctic, and official time in Western Insular Chile, which applies 742# to Easter Island and Sala y Gomez Island, will be set forward at 743# midnight and at 22:00, respectively, by 20 minutes." 744 745# From Paul Eggert (2001-05-04): 746# Go with this article in preference to Shanks's 1969 date for modern DST. 747# Assume this rule has been used since DST was introduced in the islands. 748 749# From Paul Eggert (2002-10-24): 750# <http://www.shoa.cl/shoa/faqhoraoficial.htm> gives many details that 751# disagree with the following table, but we haven't had time to compare them. 752 753# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 754Rule Chile 1918 only - Sep 1 0:00 1:00 S 755Rule Chile 1919 only - Jul 2 0:00 0 - 756Rule Chile 1927 1931 - Sep 1 0:00 1:00 S 757Rule Chile 1928 1932 - Apr 1 0:00 0 - 758Rule Chile 1966 1997 - Oct Sun>=9 4:00u 1:00 S 759Rule Chile 1967 1998 - Mar Sun>=9 3:00u 0 - 760Rule Chile 1998 only - Sep 27 4:00u 1:00 S 761Rule Chile 1999 only - Apr 4 3:00u 0 - 762Rule Chile 1999 max - Oct Sun>=9 4:00u 1:00 S 763Rule Chile 2000 max - Mar Sun>=9 3:00u 0 - 764# IATA SSIM anomalies: (1990-09) says 1990-09-16; (1992-02) says 1992-03-14; 765# (1996-09) says 1998-03-08. Ignore these. 766# Zone NAME GMTOFF RULES FORMAT [UNTIL] 767Zone America/Santiago -4:42:40 - LMT 1890 768 -4:42:40 - SMT 1910 # Santiago Mean Time 769 -5:00 Chile CL%sT 1932 Sep # Chile Time 770 -4:00 Chile CL%sT 771Zone Pacific/Easter -7:17:28 - LMT 1890 # Mataveri 772 -7:17:28 - MMT 1932 Sep # Mataveri Mean Time 773 -7:00 Chile EAS%sT 1982 Mar 14 # Easter I Time 774 -6:00 Chile EAS%sT 775# 776# Sala y Gomez Island is like Pacific/Easter. 777# Other Chilean locations, including Juan Fernandez Is, San Ambrosio, 778# San Felix, and Antarctic bases, are like America/Santiago. 779 780# Colombia 781# Shanks specifies 24:00 for 1992 transition times; go with IATA, 782# as it seems implausible to change clocks at midnight New Year's Eve. 783# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 784Rule CO 1992 only - May 2 0:00 1:00 S 785Rule CO 1992 only - Dec 31 0:00 0 - 786# Zone NAME GMTOFF RULES FORMAT [UNTIL] 787Zone America/Bogota -4:56:20 - LMT 1884 Mar 13 788 -4:56:20 - BMT 1914 Nov 23 # Bogota Mean Time 789 -5:00 CO CO%sT # Colombia Time 790# Malpelo, Providencia, San Andres 791# no information; probably like America/Bogota 792 793# Curacao 794# Shanks says that Bottom and Oranjestad have been at -4:00 since 795# standard time was introduced on 1912-03-02; and that Kralendijk and Rincon 796# used Kralendijk Mean Time (-4:33:08) from 1912-02-02 to 1965-01-01. 797# This all predates our 1970 cutoff, though. 798# Zone NAME GMTOFF RULES FORMAT [UNTIL] 799Zone America/Curacao -4:35:44 - LMT 1912 Feb 12 # Willemstad 800 -4:30 - ANT 1965 # Netherlands Antilles Time 801 -4:00 - AST 802 803# Ecuador 804# Zone NAME GMTOFF RULES FORMAT [UNTIL] 805Zone America/Guayaquil -5:19:20 - LMT 1890 806 -5:14:00 - QMT 1931 # Quito Mean Time 807 -5:00 - ECT # Ecuador Time 808Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno 809 -5:00 - ECT 1986 810 -6:00 - GALT # Galapagos Time 811 812# Falklands 813 814# From Paul Eggert (2001-03-05): 815# Between 1990 and 2000 inclusive, Shanks and the IATA agree except 816# the IATA gives 1996-09-08. Go with Shanks. 817 818# From Falkland Islands Government Office, London (2001-01-22) 819# via Jesper Norgaard: 820# ... the clocks revert back to Local Mean Time at 2 am on Sunday 15 821# April 2001 and advance one hour to summer time at 2 am on Sunday 2 822# September. It is anticipated that the clocks will revert back at 2 823# am on Sunday 21 April 2002 and advance to summer time at 2 am on 824# Sunday 1 September. 825 826# From Rives McDow (2001-02-13): 827# 828# I have communicated several times with people there, and the last 829# time I had communications that was helpful was in 1998. Here is 830# what was said then: 831# 832# "The general rule was that Stanley used daylight saving and the Camp 833# did not. However for various reasons many people in the Camp have 834# started to use daylight saving (known locally as 'Stanley Time') 835# There is no rule as to who uses daylight saving - it is a matter of 836# personal choice and so it is impossible to draw a map showing who 837# uses it and who does not. Any list would be out of date as soon as 838# it was produced. This year daylight saving ended on April 18/19th 839# and started again on September 12/13th. I do not know what the rule 840# is, but can find out if you like. We do not change at the same time 841# as UK or Chile." 842# 843# I did have in my notes that the rule was "Second Saturday in Sep at 844# 0:00 until third Saturday in Apr at 0:00". I think that this does 845# not agree in some cases with Shanks; is this true? 846# 847# Also, there is no mention in the list that some areas in the 848# Falklands do not use DST. I have found in my communications there 849# that these areas are on the western half of East Falkland and all of 850# West Falkland. Stanley is the only place that consistently observes 851# DST. Again, as in other places in the world, the farmers don't like 852# it. West Falkland is almost entirely sheep farmers. 853# 854# I know one lady there that keeps a list of which farm keeps DST and 855# which doesn't each year. She runs a shop in Stanley, and says that 856# the list changes each year. She uses it to communicate to her 857# customers, catching them when they are home for lunch or dinner. 858 859# From Paul Eggert (2001-03-05): 860# For now, we'll just record the time in Stanley, since we have no 861# better info. 862 863# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 864Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S 865Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 - 866Rule Falk 1939 only - Oct 1 0:00 1:00 S 867Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S 868Rule Falk 1943 only - Jan 1 0:00 0 - 869Rule Falk 1983 only - Sep lastSun 0:00 1:00 S 870Rule Falk 1984 1985 - Apr lastSun 0:00 0 - 871Rule Falk 1984 only - Sep 16 0:00 1:00 S 872Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S 873Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 - 874Rule Falk 2001 max - Apr Sun>=15 2:00 0 - 875Rule Falk 2001 max - Sep Sun>=1 2:00 1:00 S 876# Zone NAME GMTOFF RULES FORMAT [UNTIL] 877Zone Atlantic/Stanley -3:51:24 - LMT 1890 878 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time 879 -4:00 Falk FK%sT 1983 May # Falkland Is Time 880 -3:00 Falk FK%sT 1985 Sep 15 881 -4:00 Falk FK%sT 882 883# French Guiana 884# Zone NAME GMTOFF RULES FORMAT [UNTIL] 885Zone America/Cayenne -3:29:20 - LMT 1911 Jul 886 -4:00 - GFT 1967 Oct # French Guiana Time 887 -3:00 - GFT 888 889# Guyana 890# Zone NAME GMTOFF RULES FORMAT [UNTIL] 891Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown 892 -3:45 - GBGT 1966 May 26 # Br Guiana Time 893 -3:45 - GYT 1975 Jul 31 # Guyana Time 894 -3:00 - GYT 1991 895# IATA SSIM (1996-06) says -4:00. Assume a 1991 switch. 896 -4:00 - GYT 897 898# Paraguay 899# From Paul Eggert (1999-10-29): 900# Shanks (1999) says that spring transitions are from 01:00 -> 02:00, 901# and autumn transitions are from 00:00 -> 23:00. Go with earlier 902# editions of Shanks, and with the IATA, who say transitions occur at 00:00. 903# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 904Rule Para 1975 1988 - Oct 1 0:00 1:00 S 905Rule Para 1975 1978 - Mar 1 0:00 0 - 906Rule Para 1979 1991 - Apr 1 0:00 0 - 907Rule Para 1989 only - Oct 22 0:00 1:00 S 908Rule Para 1990 only - Oct 1 0:00 1:00 S 909Rule Para 1991 only - Oct 6 0:00 1:00 S 910Rule Para 1992 only - Mar 1 0:00 0 - 911Rule Para 1992 only - Oct 5 0:00 1:00 S 912Rule Para 1993 only - Mar 31 0:00 0 - 913Rule Para 1993 1995 - Oct 1 0:00 1:00 S 914Rule Para 1994 1995 - Feb lastSun 0:00 0 - 915Rule Para 1996 only - Mar 1 0:00 0 - 916# IATA SSIM (2000-02) says 1999-10-10; ignore this for now. 917# From Steffen Thorsen (2000-10-02): 918# I have three independent reports that Paraguay changed to DST this Sunday 919# (10-01). 920# 921# Translated by Gwillim Law (2001-02-27) from 922# <a href="http://www.diarionoticias.com.py/011000/nacional/naciona1.htm"> 923# Noticias, a daily paper in Asuncion, Paraguay (2000-10-01) 924# </a>: 925# Starting at 0:00 today, the clock will be set forward 60 minutes, in 926# fulfillment of Decree No. 7,273 of the Executive Power.... The time change 927# system has been operating for several years. Formerly there was a separate 928# decree each year; the new law has the same effect, but permanently. Every 929# year, the time will change on the first Sunday of October; likewise, the 930# clock will be set back on the first Sunday of March. 931# 932# From Jesper Norgaard (2001-03-06) [an official URL saying similar things]: 933# http://gateway.abc.com.py:8000/pub/pag04.mbr/artic?FHA=2001-03-03-02.24.52.900592 934# 935Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S 936# IATA SSIM (1997-09) says Mar 1; go with Shanks. 937Rule Para 1997 only - Feb lastSun 0:00 0 - 938# Shanks says 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but 939# (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27). 940Rule Para 1998 2001 - Mar Sun>=1 0:00 0 - 941# From Rives McDow (2002-02-28): 942# A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the 943# dst method to be from the first Sunday in September to the first Sunday in 944# April. 945Rule Para 2002 2004 - Apr Sun>=1 0:00 0 - 946Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S 947# 948# From Jesper Norgaard Welen (2005-01-02): 949# There are several sources that claim that Paraguay made 950# a timezone rule change in autumn 2004. 951# From Steffen Thorsen (2005-01-05): 952# Decree 1,867 (2004-03-05) <http://www.labor.com.py/noticias.asp?id=27> 953Rule Para 2004 max - Oct Sun>=15 0:00 1:00 S 954Rule Para 2005 max - Mar Sun>=8 0:00 0 - 955 956# Zone NAME GMTOFF RULES FORMAT [UNTIL] 957Zone America/Asuncion -3:50:40 - LMT 1890 958 -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time 959 -4:00 - PYT 1972 Oct # Paraguay Time 960 -3:00 - PYT 1974 Apr 961 -4:00 Para PY%sT 962 963# Peru 964# 965# <a href="news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net"> 966# From Evelyn C. Leeper via Mark Brader (2003-10-26):</a> 967# When we were in Peru in 1985-1986, they apparently switched over 968# sometime between December 29 and January 3 while we were on the Amazon. 969# 970# From Paul Eggert (2003-11-02): 971# Shanks doesn't have this transition. Assume 1986 was like 1987. 972 973# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 974Rule Peru 1938 only - Jan 1 0:00 1:00 S 975Rule Peru 1938 only - Apr 1 0:00 0 - 976Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S 977Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 - 978Rule Peru 1986 1987 - Jan 1 0:00 1:00 S 979Rule Peru 1986 1987 - Apr 1 0:00 0 - 980Rule Peru 1990 only - Jan 1 0:00 1:00 S 981Rule Peru 1990 only - Apr 1 0:00 0 - 982# IATA is ambiguous for 1993/1995; go with Shanks. 983Rule Peru 1994 only - Jan 1 0:00 1:00 S 984Rule Peru 1994 only - Apr 1 0:00 0 - 985# Zone NAME GMTOFF RULES FORMAT [UNTIL] 986Zone America/Lima -5:08:12 - LMT 1890 987 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time? 988 -5:00 Peru PE%sT # Peru Time 989 990# South Georgia 991# Zone NAME GMTOFF RULES FORMAT [UNTIL] 992Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken 993 -2:00 - GST # South Georgia Time 994 995# South Sandwich Is 996# uninhabited; scientific personnel have wintered 997 998# Suriname 999# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1000Zone America/Paramaribo -3:40:40 - LMT 1911 1001 -3:40:52 - PMT 1935 # Paramaribo Mean Time 1002 -3:40:36 - PMT 1945 Oct # The capital moved? 1003 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time 1004 -3:30 - SRT 1984 Oct # Suriname Time 1005 -3:00 - SRT 1006 1007# Trinidad and Tobago 1008# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1009Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2 1010 -4:00 - AST 1011 1012# Uruguay 1013# From Paul Eggert <eggert@twinsun.com> (1993-11-18): 1014# Uruguay wins the prize for the strangest peacetime manipulation of the rules. 1015# From Shanks: 1016# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1017# Whitman gives 1923 Oct 1; go with Shanks. 1018Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS 1019Rule Uruguay 1924 1926 - Apr 1 0:00 0 - 1020Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS 1021Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS 1022# Shanks gives 1935 Apr 1 0:00 and 1936 Mar 30 0:00; go with Whitman. 1023Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 - 1024Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS 1025Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 - 1026# Whitman gives 1937 Oct 3; go with Shanks. 1027Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS 1028# Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13, 1029# and 1943 Apr 13 ``to present time''; go with Shanks. 1030Rule Uruguay 1941 only - Aug 1 0:00 0 - 1031Rule Uruguay 1942 only - Jan 1 0:00 0:30 HS 1032Rule Uruguay 1942 only - Dec 14 0:00 1:00 S 1033Rule Uruguay 1943 only - Mar 14 0:00 0 - 1034Rule Uruguay 1959 only - May 24 0:00 1:00 S 1035Rule Uruguay 1959 only - Nov 15 0:00 0 - 1036Rule Uruguay 1960 only - Jan 17 0:00 1:00 S 1037Rule Uruguay 1960 only - Mar 6 0:00 0 - 1038Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S 1039Rule Uruguay 1965 only - Sep 26 0:00 0 - 1040Rule Uruguay 1966 1967 - Oct 31 0:00 0 - 1041Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS 1042Rule Uruguay 1968 1970 - Dec 2 0:00 0 - 1043Rule Uruguay 1972 only - Apr 24 0:00 1:00 S 1044Rule Uruguay 1972 only - Aug 15 0:00 0 - 1045Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS 1046Rule Uruguay 1974 only - Dec 22 0:00 1:00 S 1047Rule Uruguay 1976 only - Oct 1 0:00 0 - 1048Rule Uruguay 1977 only - Dec 4 0:00 1:00 S 1049Rule Uruguay 1978 only - Apr 1 0:00 0 - 1050Rule Uruguay 1979 only - Oct 1 0:00 1:00 S 1051Rule Uruguay 1980 only - May 1 0:00 0 - 1052Rule Uruguay 1987 only - Dec 14 0:00 1:00 S 1053Rule Uruguay 1988 only - Mar 14 0:00 0 - 1054Rule Uruguay 1988 only - Dec 11 0:00 1:00 S 1055Rule Uruguay 1989 only - Mar 12 0:00 0 - 1056Rule Uruguay 1989 only - Oct 29 0:00 1:00 S 1057# Shanks says no DST was observed in 1990/1 and 1991/2, 1058# and that 1992/3's DST was from 10-25 to 03-01. Go with IATA. 1059Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 - 1060Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S 1061Rule Uruguay 1992 only - Oct 18 0:00 1:00 S 1062Rule Uruguay 1993 only - Feb 28 0:00 0 - 1063# From Eduardo Cota (2004-09-20): 1064# The uruguayan government has decreed a change in the local time.... 1065# http://www.presidencia.gub.uy/decretos/2004091502.htm 1066Rule Uruguay 2004 only - Sep 19 0:00 1:00 S 1067# From Steffen Thorsen (2005-03-11): 1068# Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to 1069# save energy ... it was postponed two weeks.... 1070# http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm 1071Rule Uruguay 2005 only - Mar 27 2:00 0 - 1072# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1073Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28 1074 -3:44:44 - MMT 1920 May 1 # Montevideo MT 1075 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time 1076 -3:00 Uruguay UY%sT 1077 1078# Venezuela 1079# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1080Zone America/Caracas -4:27:44 - LMT 1890 1081 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time? 1082 -4:30 - VET 1965 # Venezuela Time 1083 -4:00 - VET 1084
