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 (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 (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 (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 (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 (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), Chubut (CH) 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# Santa Cruz (SC) 327Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31 328 -4:16:48 - CMT 1920 May # Cordoba Mean Time 329 -4:00 - ART 1930 Dec 330 -4:00 Arg AR%sT 1969 Oct 5 331 -3:00 Arg AR%sT 1999 Oct 3 332 -4:00 Arg AR%sT 2000 Mar 3 333 -3:00 - ART 2004 Jun 1 334 -4:00 - WART 2004 Jun 20 335 -3:00 - ART 336# 337# Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF) 338Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31 339 -4:16:48 - CMT 1920 May # Cordoba Mean Time 340 -4:00 - ART 1930 Dec 341 -4:00 Arg AR%sT 1969 Oct 5 342 -3:00 Arg AR%sT 1999 Oct 3 343 -4:00 Arg AR%sT 2000 Mar 3 344 -3:00 - ART 2004 May 30 345 -4:00 - WART 2004 Jun 20 346 -3:00 - ART 347 348# Aruba 349# Zone NAME GMTOFF RULES FORMAT [UNTIL] 350Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad 351 -4:30 - ANT 1965 # Netherlands Antilles Time 352 -4:00 - AST 353 354# Bolivia 355# Zone NAME GMTOFF RULES FORMAT [UNTIL] 356Zone America/La_Paz -4:32:36 - LMT 1890 357 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT 358 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST 359 -4:00 - BOT # Bolivia Time 360 361# Brazil 362 363# From Paul Eggert (1993-11-18): 364# The mayor of Rio recently attempted to change the time zone rules 365# just in his city, in order to leave more summer time for the tourist trade. 366# The rule change lasted only part of the day; 367# the federal government refused to follow the city's rules, and business 368# was in a chaos, so the mayor backed down that afternoon. 369 370# From IATA SSIM (1996-02): 371# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS), 372# Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ), 373# Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO), 374# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL]. 375# [The last three states are new to this issue of the IATA SSIM.] 376 377# From Gwillim Law (1996-10-07): 378# Geography, history (Tocantins was part of Goias until 1989), and other 379# sources of time zone information lead me to believe that AL, SE, and TO were 380# always in BR1, and so the only change was whether or not they observed DST.... 381# The earliest issue of the SSIM I have is 2/91. Each issue from then until 382# 9/95 says that DST is observed only in the ten states I quoted from 9/95, 383# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2 384# (UTC-4).... The other two time zones given for Brazil are BR3, which is 385# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is 386# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's 387# become part of the state of Pernambuco). The boundary between BR1 and BR2 388# has never been clearly stated. They've simply been called East and West. 389# However, some conclusions can be drawn from another IATA manual: the Airline 390# Coding Directory, which lists close to 400 airports in Brazil. For each 391# airport it gives a time zone which is coded to the SSIM. From that 392# information, I'm led to conclude that the states of Amapa (AP), Ceara (CE), 393# Maranhao (MA), Paraiba (PR), Pernambuco (PE), Piaui (PI), and Rio Grande do 394# Norte (RN), and the eastern part of Para (PA) are all in BR1 without DST. 395 396# From Marcos Tadeu (1998-09-27): 397# <a href="http://pcdsh01.on.br/verao1.html"> 398# Brazilian official page 399# </a> 400 401# From Jesper Norgaard (2000-11-03): 402# [For an official list of which regions in Brazil use which time zones, see:] 403# http://pcdsh01.on.br/Fusbr.htm 404# http://pcdsh01.on.br/Fusbrhv.htm 405 406# From Celso Doria via David Madeo (2002-10-09): 407# The reason for the delay this year has to do with elections in Brazil. 408# 409# Unlike in the United States, elections in Brazil are 100% computerized and 410# the results are known almost immediately. Yesterday, it was the first 411# round of the elections when 115 million Brazilians voted for President, 412# Governor, Senators, Federal Deputies, and State Deputies. Nobody is 413# counting (or re-counting) votes anymore and we know there will be a second 414# round for the Presidency and also for some Governors. The 2nd round will 415# take place on October 27th. 416# 417# The reason why the DST will only begin November 3rd is that the thousands 418# of electoral machines used cannot have their time changed, and since the 419# Constitution says the elections must begin at 8:00 AM and end at 5:00 PM, 420# the Government decided to postpone DST, instead of changing the Constitution 421# (maybe, for the next elections, it will be possible to change the clock)... 422 423# From Rodrigo Severo (2004-10-04): 424# It's just the biannual change made necessary by the much hyped, supposedly 425# modern Brazilian eletronic voting machines which, apparently, can't deal 426# with a time change between the first and the second rounds of the elections. 427 428# From Paul Eggert (2002-10-10): 429# The official decrees referenced below are mostly taken from 430# <a href="http://pcdsh01.on.br/DecHV.html"> 431# Decretos sobre o Horario de Verao no Brasil 432# </a> (2001-09-20, in Portuguese). 433# The official site for all decrees, including those not related to time, is 434# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/principal_ano.htm"> 435# Presidencia da Republica, Subchefia para Assuntos Juridicos, Decretos 436# </a> (in Portuguese). 437 438# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 439# Decree <a href="http://pcdsh01.on.br/HV20466.htm">20,466</a> (1931-10-01) 440# Decree <a href="http://pcdsh01.on.br/HV21896.htm">21,896</a> (1932-01-10) 441Rule Brazil 1931 only - Oct 3 11:00 1:00 S 442Rule Brazil 1932 1933 - Apr 1 0:00 0 - 443Rule Brazil 1932 only - Oct 3 0:00 1:00 S 444# Decree <a href="http://pcdsh01.on.br/HV23195.htm">23,195</a> (1933-10-10) 445# revoked DST. 446# Decree <a href="http://pcdsh01.on.br/HV27496.htm">27,496</a> (1949-11-24) 447# Decree <a href="http://pcdsh01.on.br/HV27998.htm">27,998</a> (1950-04-13) 448Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S 449Rule Brazil 1950 only - Apr 16 1:00 0 - 450Rule Brazil 1951 1952 - Apr 1 0:00 0 - 451# Decree <a href="http://pcdsh01.on.br/HV32308.htm">32,308</a> (1953-02-24) 452Rule Brazil 1953 only - Mar 1 0:00 0 - 453# Decree <a href="http://pcdsh01.on.br/HV34724.htm">34,724</a> (1953-11-30) 454# revoked DST. 455# Decree <a href="http://pcdsh01.on.br/HV52700.htm">52,700</a> (1963-10-18) 456# established DST from 1963-10-23 00:00 to 1964-02-29 00:00 457# in SP, RJ, GB, MG, ES, due to the prolongation of the drought. 458# Decree <a href="http://pcdsh01.on.br/HV53071.htm">53,071</a> (1963-12-03) 459# extended the above decree to all of the national territory on 12-09. 460Rule Brazil 1963 only - Dec 9 0:00 1:00 S 461# Decree <a href="http://pcdsh01.on.br/HV53604.htm">53,604</a> (1964-02-25) 462# extended summer time by one day to 1964-03-01 00:00 (start of school). 463Rule Brazil 1964 only - Mar 1 0:00 0 - 464# Decree <a href="http://pcdsh01.on.br/HV55639.htm">55,639</a> (1965-01-27) 465Rule Brazil 1965 only - Jan 31 0:00 1:00 S 466Rule Brazil 1965 only - Mar 31 0:00 0 - 467# Decree <a href="http://pcdsh01.on.br/HV57303.htm">57,303</a> (1965-11-22) 468Rule Brazil 1965 only - Dec 1 0:00 1:00 S 469# Decree <a href="http://pcdsh01.on.br/HV57843.htm">57,843</a> (1966-02-18) 470Rule Brazil 1966 1968 - Mar 1 0:00 0 - 471Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S 472# Decree <a href="http://pcdsh01.on.br/HV63429.htm">63,429</a> (1968-10-15) 473# revoked DST. 474# Decree <a href="http://pcdsh01.on.br/HV91698.htm">91,698</a> (1985-09-27) 475Rule Brazil 1985 only - Nov 2 0:00 1:00 S 476# Decree 92,310 (1986-01-21) 477# Decree 92,463 (1986-03-13) 478Rule Brazil 1986 only - Mar 15 0:00 0 - 479# Decree 93,316 (1986-10-01) 480Rule Brazil 1986 only - Oct 25 0:00 1:00 S 481Rule Brazil 1987 only - Feb 14 0:00 0 - 482# Decree <a href="http://pcdsh01.on.br/HV94922.htm">94,922</a> (1987-09-22) 483Rule Brazil 1987 only - Oct 25 0:00 1:00 S 484Rule Brazil 1988 only - Feb 7 0:00 0 - 485# Decree <a href="http://pcdsh01.on.br/HV96676.htm">96,676</a> (1988-09-12) 486# except for the states of AC, AM, PA, RR, RO, and AP (then a territory) 487Rule Brazil 1988 only - Oct 16 0:00 1:00 S 488Rule Brazil 1989 only - Jan 29 0:00 0 - 489# Decree <a href="http://pcdsh01.on.br/HV98077.htm">98,077</a> (1989-08-21) 490# with the same exceptions 491Rule Brazil 1989 only - Oct 15 0:00 1:00 S 492Rule Brazil 1990 only - Feb 11 0:00 0 - 493# Decree <a href="http://pcdsh01.on.br/HV99530.htm">99,530</a> (1990-09-17) 494# adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF. 495# Decree 99,629 (1990-10-19) adds BA, MT. 496Rule Brazil 1990 only - Oct 21 0:00 1:00 S 497Rule Brazil 1991 only - Feb 17 0:00 0 - 498# <a href="http://pcdsh01.on.br/HV1991.htm">Unnumbered decree</a> (1991-09-25) 499# adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF. 500Rule Brazil 1991 only - Oct 20 0:00 1:00 S 501Rule Brazil 1992 only - Feb 9 0:00 0 - 502# <a href="http://pcdsh01.on.br/HV1992.htm">Unnumbered decree</a> (1992-10-16) 503# adopted by same states. 504Rule Brazil 1992 only - Oct 25 0:00 1:00 S 505Rule Brazil 1993 only - Jan 31 0:00 0 - 506# Decree <a href="http://pcdsh01.on.br/HV942.htm">942</a> (1993-09-28) 507# adopted by same states, plus AM. 508# Decree <a href="http://pcdsh01.on.br/HV1252.htm">1,252</a> (1994-09-22; 509# web page corrected 2004-01-07) adopted by same states, minus AM. 510# Decree <a href="http://pcdsh01.on.br/HV1636.htm">1,636</a> (1995-09-14) 511# adopted by same states, plus MT and TO. 512# Decree <a href="http://pcdsh01.on.br/HV1674.htm">1,674</a> (1995-10-13) 513# adds AL, SE. 514Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S 515Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 - 516Rule Brazil 1996 only - Feb 11 0:00 0 - 517# Decree <a href="http://pcdsh01.on.br/HV2000.htm">2,000</a> (1996-09-04) 518# adopted by same states, minus AL, SE. 519Rule Brazil 1996 only - Oct 6 0:00 1:00 S 520Rule Brazil 1997 only - Feb 16 0:00 0 - 521# From Daniel C. Sobral (1998-02-12): 522# In 1997, the DS began on October 6. The stated reason was that 523# because international television networks ignored Brazil's policy on DS, 524# they bought the wrong times on satellite for coverage of Pope's visit. 525# This year, the ending date of DS was postponed to March 1 526# to help dealing with the shortages of electric power. 527# 528# Decree 2,317 (1997-09-04), adopted by same states. 529Rule Brazil 1997 only - Oct 6 0:00 1:00 S 530# Decree <a href="http://pcdsh01.on.br/figuras/HV2495.JPG">2,495</a> 531# (1998-02-10) 532Rule Brazil 1998 only - Mar 1 0:00 0 - 533# Decree <a href="http://pcdsh01.on.br/figuras/Hv98.jpg">2,780</a> (1998-09-11) 534# adopted by the same states as before. 535Rule Brazil 1998 only - Oct 11 0:00 1:00 S 536Rule Brazil 1999 only - Feb 21 0:00 0 - 537# Decree <a href="http://pcdsh01.on.br/figuras/HV3150.gif">3,150</a> 538# (1999-08-23) adopted by same states. 539# Decree <a href="http://pcdsh01.on.br/DecHV99.gif">3,188</a> (1999-09-30) 540# adds SE, AL, PB, PE, RN, CE, PI, MA and RR. 541Rule Brazil 1999 only - Oct 3 0:00 1:00 S 542Rule Brazil 2000 only - Feb 27 0:00 0 - 543# Decree <a href="http://pcdsh01.on.br/DEC3592.htm">3,592</a> (2000-09-06) 544# adopted by the same states as before. 545# Decree <a href="http://pcdsh01.on.br/Dec3630.jpg">3,630</a> (2000-10-13) 546# repeals DST in PE and RR, effective 2000-10-15 00:00. 547# Decree <a href="http://pcdsh01.on.br/Dec3632.jpg">3,632</a> (2000-10-17) 548# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00. 549# Decree <a href="http://pcdsh01.on.br/figuras/HV3916.gif">3,916</a> 550# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE. 551Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S 552Rule Brazil 2001 max - Feb Sun>=15 0:00 0 - 553# Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE. 554# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm"></a> 555Rule Brazil 2002 only - Nov 3 0:00 1:00 S 556# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO. 557# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm"></a> 558Rule Brazil 2003 only - Oct 19 0:00 1:00 S 559# Decree 5,223 (2004-10-01) reestablishes DST in MT. 560# <a href="http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm"></a> 561Rule Brazil 2004 only - Nov 2 0:00 1:00 S 562# Decree <a href="http://pcdsh01.on.br/DecHV5539.gif">5,539</a> (2005-09-19), 563# adopted by the same states as before. 564Rule Brazil 2005 max - Oct Sun>=15 0:00 1:00 S 565# The latest ruleset listed above says that the following states observe DST: 566# DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP. 567# For dates after mid-2006, the above rules with TO="max" are guesses 568# and are quite possibly wrong, but are more likely than no DST at all. 569 570 571# Zone NAME GMTOFF RULES FORMAT [UNTIL] 572# 573# Fernando de Noronha (administratively part of PE) 574Zone America/Noronha -2:09:40 - LMT 1914 575 -2:00 Brazil FN%sT 1990 Sep 17 576 -2:00 - FNT 1999 Sep 30 577 -2:00 Brazil FN%sT 2000 Oct 15 578 -2:00 - FNT 2001 Sep 13 579 -2:00 Brazil FN%sT 2002 Oct 1 580 -2:00 - FNT 581# Other Atlantic islands have no permanent settlement. 582# These include Trindade and Martin Vaz (administratively part of ES), 583# Atol das Rocas (RN), and Penedos de Sao Pedro e Sao Paulo (PE). 584# Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01; 585# it also included the Penedos. 586# 587# Amapa (AP), east Para (PA) 588# East Para includes Belem, Maraba, Serra Norte, and Sao Felix do Xingu. 589# The division between east and west Para is the river Xingu. 590# In the north a very small part from the river Javary (now Jari I guess, 591# the border with Amapa) to the Amazon, then to the Xingu. 592Zone America/Belem -3:13:56 - LMT 1914 593 -3:00 Brazil BR%sT 1988 Sep 12 594 -3:00 - BRT 595# 596# Maranhao (MA), Piaui (PI), Ceara (CE), Rio Grande do Norte (RN), 597# Paraiba (PB) 598Zone America/Fortaleza -2:34:00 - LMT 1914 599 -3:00 Brazil BR%sT 1990 Sep 17 600 -3:00 - BRT 1999 Sep 30 601 -3:00 Brazil BR%sT 2000 Oct 22 602 -3:00 - BRT 2001 Sep 13 603 -3:00 Brazil BR%sT 2002 Oct 1 604 -3:00 - BRT 605# 606# Pernambuco (PE) (except Atlantic islands) 607Zone America/Recife -2:19:36 - LMT 1914 608 -3:00 Brazil BR%sT 1990 Sep 17 609 -3:00 - BRT 1999 Sep 30 610 -3:00 Brazil BR%sT 2000 Oct 15 611 -3:00 - BRT 2001 Sep 13 612 -3:00 Brazil BR%sT 2002 Oct 1 613 -3:00 - BRT 614# 615# Tocantins (TO) 616Zone America/Araguaina -3:12:48 - LMT 1914 617 -3:00 Brazil BR%sT 1990 Sep 17 618 -3:00 - BRT 1995 Sep 14 619 -3:00 Brazil BR%sT 2003 Sep 24 620 -3:00 - BRT 621# 622# Alagoas (AL), Sergipe (SE) 623Zone America/Maceio -2:22:52 - LMT 1914 624 -3:00 Brazil BR%sT 1990 Sep 17 625 -3:00 - BRT 1995 Oct 13 626 -3:00 Brazil BR%sT 1996 Sep 4 627 -3:00 - BRT 1999 Sep 30 628 -3:00 Brazil BR%sT 2000 Oct 22 629 -3:00 - BRT 2001 Sep 13 630 -3:00 Brazil BR%sT 2002 Oct 1 631 -3:00 - BRT 632# 633# Bahia (BA) 634# There are too many Salvadors elsewhere, so use America/Bahia instead 635# of America/Salvador. 636Zone America/Bahia -2:34:04 - LMT 1914 637 -3:00 Brazil BR%sT 2003 Sep 24 638 -3:00 - BRT 639# 640# Goias (GO), Distrito Federal (DF), Minas Gerais (MG), 641# Espirito Santo (ES), Rio de Janeiro (RJ), Sao Paulo (SP), Parana (PR), 642# Santa Catarina (SC), Rio Grande do Sul (RS) 643Zone America/Sao_Paulo -3:06:28 - LMT 1914 644 -3:00 Brazil BR%sT 1963 Oct 23 00:00 645 -3:00 1:00 BRST 1964 646 -3:00 Brazil BR%sT 647# 648# Mato Grosso do Sul (MS) 649Zone America/Campo_Grande -3:38:28 - LMT 1914 650 -4:00 Brazil AM%sT 651# 652# Mato Grosso (MT) 653Zone America/Cuiaba -3:44:20 - LMT 1914 654 -4:00 Brazil AM%sT 2003 Sep 24 655 -4:00 - AMT 2004 Oct 1 656 -4:00 Brazil AM%sT 657# 658# west Para (PA), Rondonia (RO) 659# West Para includes Altamira, Oribidos, Prainha, Oriximina, and Santarem. 660Zone America/Porto_Velho -4:15:36 - LMT 1914 661 -4:00 Brazil AM%sT 1988 Sep 12 662 -4:00 - AMT 663# 664# Roraima (RR) 665Zone America/Boa_Vista -4:02:40 - LMT 1914 666 -4:00 Brazil AM%sT 1988 Sep 12 667 -4:00 - AMT 1999 Sep 30 668 -4:00 Brazil AM%sT 2000 Oct 15 669 -4:00 - AMT 670# 671# east Amazonas (AM): Boca do Acre, Jutai, Manaus, Floriano Peixoto 672# The great circle line from Tabatinga to Porto Acre divides 673# east from west Amazonas. 674Zone America/Manaus -4:00:04 - LMT 1914 675 -4:00 Brazil AM%sT 1988 Sep 12 676 -4:00 - AMT 1993 Sep 28 677 -4:00 Brazil AM%sT 1994 Sep 22 678 -4:00 - AMT 679# 680# west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant, 681# Eirunepe, Envira, Ipixuna 682Zone America/Eirunepe -4:39:28 - LMT 1914 683 -5:00 Brazil AC%sT 1988 Sep 12 684 -5:00 - ACT 1993 Sep 28 685 -5:00 Brazil AC%sT 1994 Sep 22 686 -5:00 - ACT 687# 688# Acre (AC) 689Zone America/Rio_Branco -4:31:12 - LMT 1914 690 -5:00 Brazil AC%sT 1988 Sep 12 691 -5:00 - ACT 692 693 694# Chile 695 696# From Eduardo Krell (1995-10-19): 697# The law says to switch to DST at midnight [24:00] on the second SATURDAY 698# of October.... The law is the same for March and October. 699# (1998-09-29): 700# Because of the drought this year, the government decided to go into 701# DST earlier (saturday 9/26 at 24:00). This is a one-time change only ... 702# (unless there's another dry season next year, I guess). 703 704# From Julio I. Pacheco Troncoso (1999-03-18): 705# Because of the same drought, the government decided to end DST later, 706# on April 3, (one-time change). 707 708# From Gwillim Law (2001-05-04): 709# I came across another article in "La Tercera" about Chilean DST. 710# <http://www.tercera.cl/diario/2000/10/13/t-extras.html> 711# It clearly confirms my earlier suggestion, that DST begins at 22:00 712# on Easter Island.... But it also seems to be saying that the 713# observance of DST in Chile began in 1966, rather than 1969 as 714# ... [Shanks] has it.... 715# 716# My translation: 717# 718# "The Chilean Army has announced that summer time will begin tomorrow, 719# Saturday, October 14 in continental Chile, insular Chile, and 720# Antarctica, as provided by Supreme Decree 25 of January 11, 1966. 721# By the preceding, official time in continental Chile and Chilean 722# Antarctic, and official time in Western Insular Chile, which applies 723# to Easter Island and Sala y Gomez Island, will be set forward at 724# midnight and at 22:00, respectively, by 20 minutes." 725 726# From Paul Eggert (2001-05-04): 727# Go with this article in preference to Shanks's 1969 date for modern DST. 728# Assume this rule has been used since DST was introduced in the islands. 729 730# From Paul Eggert (2002-10-24): 731# <http://www.shoa.cl/shoa/faqhoraoficial.htm> gives many details that 732# disagree with the following table, but we haven't had time to compare them. 733 734# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 735Rule Chile 1918 only - Sep 1 0:00 1:00 S 736Rule Chile 1919 only - Jul 2 0:00 0 - 737Rule Chile 1927 1931 - Sep 1 0:00 1:00 S 738Rule Chile 1928 1932 - Apr 1 0:00 0 - 739Rule Chile 1966 1997 - Oct Sun>=9 4:00u 1:00 S 740Rule Chile 1967 1998 - Mar Sun>=9 3:00u 0 - 741Rule Chile 1998 only - Sep 27 4:00u 1:00 S 742Rule Chile 1999 only - Apr 4 3:00u 0 - 743Rule Chile 1999 max - Oct Sun>=9 4:00u 1:00 S 744Rule Chile 2000 max - Mar Sun>=9 3:00u 0 - 745# IATA SSIM anomalies: (1990-09) says 1990-09-16; (1992-02) says 1992-03-14; 746# (1996-09) says 1998-03-08. Ignore these. 747# Zone NAME GMTOFF RULES FORMAT [UNTIL] 748Zone America/Santiago -4:42:40 - LMT 1890 749 -4:42:40 - SMT 1910 # Santiago Mean Time 750 -5:00 Chile CL%sT 1932 Sep # Chile Time 751 -4:00 Chile CL%sT 752Zone Pacific/Easter -7:17:28 - LMT 1890 # Mataveri 753 -7:17:28 - MMT 1932 Sep # Mataveri Mean Time 754 -7:00 Chile EAS%sT 1982 Mar 14 # Easter I Time 755 -6:00 Chile EAS%sT 756# 757# Sala y Gomez Island is like Pacific/Easter. 758# Other Chilean locations, including Juan Fernandez Is, San Ambrosio, 759# San Felix, and Antarctic bases, are like America/Santiago. 760 761# Colombia 762# Shanks specifies 24:00 for 1992 transition times; go with IATA, 763# as it seems implausible to change clocks at midnight New Year's Eve. 764# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 765Rule CO 1992 only - May 2 0:00 1:00 S 766Rule CO 1992 only - Dec 31 0:00 0 - 767# Zone NAME GMTOFF RULES FORMAT [UNTIL] 768Zone America/Bogota -4:56:20 - LMT 1884 Mar 13 769 -4:56:20 - BMT 1914 Nov 23 # Bogota Mean Time 770 -5:00 CO CO%sT # Colombia Time 771# Malpelo, Providencia, San Andres 772# no information; probably like America/Bogota 773 774# Curacao 775# Shanks says that Bottom and Oranjestad have been at -4:00 since 776# standard time was introduced on 1912-03-02; and that Kralendijk and Rincon 777# used Kralendijk Mean Time (-4:33:08) from 1912-02-02 to 1965-01-01. 778# This all predates our 1970 cutoff, though. 779# Zone NAME GMTOFF RULES FORMAT [UNTIL] 780Zone America/Curacao -4:35:44 - LMT 1912 Feb 12 # Willemstad 781 -4:30 - ANT 1965 # Netherlands Antilles Time 782 -4:00 - AST 783 784# Ecuador 785# Zone NAME GMTOFF RULES FORMAT [UNTIL] 786Zone America/Guayaquil -5:19:20 - LMT 1890 787 -5:14:00 - QMT 1931 # Quito Mean Time 788 -5:00 - ECT # Ecuador Time 789Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno 790 -5:00 - ECT 1986 791 -6:00 - GALT # Galapagos Time 792 793# Falklands 794 795# From Paul Eggert (2001-03-05): 796# Between 1990 and 2000 inclusive, Shanks and the IATA agree except 797# the IATA gives 1996-09-08. Go with Shanks. 798 799# From Falkland Islands Government Office, London (2001-01-22) 800# via Jesper Norgaard: 801# ... the clocks revert back to Local Mean Time at 2 am on Sunday 15 802# April 2001 and advance one hour to summer time at 2 am on Sunday 2 803# September. It is anticipated that the clocks will revert back at 2 804# am on Sunday 21 April 2002 and advance to summer time at 2 am on 805# Sunday 1 September. 806 807# From Rives McDow (2001-02-13): 808# 809# I have communicated several times with people there, and the last 810# time I had communications that was helpful was in 1998. Here is 811# what was said then: 812# 813# "The general rule was that Stanley used daylight saving and the Camp 814# did not. However for various reasons many people in the Camp have 815# started to use daylight saving (known locally as 'Stanley Time') 816# There is no rule as to who uses daylight saving - it is a matter of 817# personal choice and so it is impossible to draw a map showing who 818# uses it and who does not. Any list would be out of date as soon as 819# it was produced. This year daylight saving ended on April 18/19th 820# and started again on September 12/13th. I do not know what the rule 821# is, but can find out if you like. We do not change at the same time 822# as UK or Chile." 823# 824# I did have in my notes that the rule was "Second Saturday in Sep at 825# 0:00 until third Saturday in Apr at 0:00". I think that this does 826# not agree in some cases with Shanks; is this true? 827# 828# Also, there is no mention in the list that some areas in the 829# Falklands do not use DST. I have found in my communications there 830# that these areas are on the western half of East Falkland and all of 831# West Falkland. Stanley is the only place that consistently observes 832# DST. Again, as in other places in the world, the farmers don't like 833# it. West Falkland is almost entirely sheep farmers. 834# 835# I know one lady there that keeps a list of which farm keeps DST and 836# which doesn't each year. She runs a shop in Stanley, and says that 837# the list changes each year. She uses it to communicate to her 838# customers, catching them when they are home for lunch or dinner. 839 840# From Paul Eggert (2001-03-05): 841# For now, we'll just record the time in Stanley, since we have no 842# better info. 843 844# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 845Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S 846Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 - 847Rule Falk 1939 only - Oct 1 0:00 1:00 S 848Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S 849Rule Falk 1943 only - Jan 1 0:00 0 - 850Rule Falk 1983 only - Sep lastSun 0:00 1:00 S 851Rule Falk 1984 1985 - Apr lastSun 0:00 0 - 852Rule Falk 1984 only - Sep 16 0:00 1:00 S 853Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S 854Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 - 855Rule Falk 2001 max - Apr Sun>=15 2:00 0 - 856Rule Falk 2001 max - Sep Sun>=1 2:00 1:00 S 857# Zone NAME GMTOFF RULES FORMAT [UNTIL] 858Zone Atlantic/Stanley -3:51:24 - LMT 1890 859 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time 860 -4:00 Falk FK%sT 1983 May # Falkland Is Time 861 -3:00 Falk FK%sT 1985 Sep 15 862 -4:00 Falk FK%sT 863 864# French Guiana 865# Zone NAME GMTOFF RULES FORMAT [UNTIL] 866Zone America/Cayenne -3:29:20 - LMT 1911 Jul 867 -4:00 - GFT 1967 Oct # French Guiana Time 868 -3:00 - GFT 869 870# Guyana 871# Zone NAME GMTOFF RULES FORMAT [UNTIL] 872Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown 873 -3:45 - GBGT 1966 May 26 # Br Guiana Time 874 -3:45 - GYT 1975 Jul 31 # Guyana Time 875 -3:00 - GYT 1991 876# IATA SSIM (1996-06) says -4:00. Assume a 1991 switch. 877 -4:00 - GYT 878 879# Paraguay 880# From Paul Eggert (1999-10-29): 881# Shanks (1999) says that spring transitions are from 01:00 -> 02:00, 882# and autumn transitions are from 00:00 -> 23:00. Go with earlier 883# editions of Shanks, and with the IATA, who say transitions occur at 00:00. 884# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 885Rule Para 1975 1988 - Oct 1 0:00 1:00 S 886Rule Para 1975 1978 - Mar 1 0:00 0 - 887Rule Para 1979 1991 - Apr 1 0:00 0 - 888Rule Para 1989 only - Oct 22 0:00 1:00 S 889Rule Para 1990 only - Oct 1 0:00 1:00 S 890Rule Para 1991 only - Oct 6 0:00 1:00 S 891Rule Para 1992 only - Mar 1 0:00 0 - 892Rule Para 1992 only - Oct 5 0:00 1:00 S 893Rule Para 1993 only - Mar 31 0:00 0 - 894Rule Para 1993 1995 - Oct 1 0:00 1:00 S 895Rule Para 1994 1995 - Feb lastSun 0:00 0 - 896Rule Para 1996 only - Mar 1 0:00 0 - 897# IATA SSIM (2000-02) says 1999-10-10; ignore this for now. 898# From Steffen Thorsen (2000-10-02): 899# I have three independent reports that Paraguay changed to DST this Sunday 900# (10-01). 901# 902# Translated by Gwillim Law (2001-02-27) from 903# <a href="http://www.diarionoticias.com.py/011000/nacional/naciona1.htm"> 904# Noticias, a daily paper in Asuncion, Paraguay (2000-10-01) 905# </a>: 906# Starting at 0:00 today, the clock will be set forward 60 minutes, in 907# fulfillment of Decree No. 7,273 of the Executive Power.... The time change 908# system has been operating for several years. Formerly there was a separate 909# decree each year; the new law has the same effect, but permanently. Every 910# year, the time will change on the first Sunday of October; likewise, the 911# clock will be set back on the first Sunday of March. 912# 913# From Jesper Norgaard (2001-03-06) [an official URL saying similar things]: 914# http://gateway.abc.com.py:8000/pub/pag04.mbr/artic?FHA=2001-03-03-02.24.52.900592 915# 916Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S 917# IATA SSIM (1997-09) says Mar 1; go with Shanks. 918Rule Para 1997 only - Feb lastSun 0:00 0 - 919# Shanks says 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but 920# (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27). 921Rule Para 1998 2001 - Mar Sun>=1 0:00 0 - 922# From Rives McDow (2002-02-28): 923# A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the 924# dst method to be from the first Sunday in September to the first Sunday in 925# April. 926Rule Para 2002 2004 - Apr Sun>=1 0:00 0 - 927Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S 928# 929# From Jesper Norgaard Welen (2005-01-02): 930# There are several sources that claim that Paraguay made 931# a timezone rule change in autumn 2004. 932# From Steffen Thorsen (2005-01-05): 933# Decree 1,867 (2004-03-05) <http://www.labor.com.py/noticias.asp?id=27> 934Rule Para 2004 max - Oct Sun>=15 0:00 1:00 S 935Rule Para 2005 max - Mar Sun>=8 0:00 0 - 936 937# Zone NAME GMTOFF RULES FORMAT [UNTIL] 938Zone America/Asuncion -3:50:40 - LMT 1890 939 -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time 940 -4:00 - PYT 1972 Oct # Paraguay Time 941 -3:00 - PYT 1974 Apr 942 -4:00 Para PY%sT 943 944# Peru 945# 946# <a href="news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net"> 947# From Evelyn C. Leeper via Mark Brader (2003-10-26):</a> 948# When we were in Peru in 1985-1986, they apparently switched over 949# sometime between December 29 and January 3 while we were on the Amazon. 950# 951# From Paul Eggert (2003-11-02): 952# Shanks doesn't have this transition. Assume 1986 was like 1987. 953 954# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 955Rule Peru 1938 only - Jan 1 0:00 1:00 S 956Rule Peru 1938 only - Apr 1 0:00 0 - 957Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S 958Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 - 959Rule Peru 1986 1987 - Jan 1 0:00 1:00 S 960Rule Peru 1986 1987 - Apr 1 0:00 0 - 961Rule Peru 1990 only - Jan 1 0:00 1:00 S 962Rule Peru 1990 only - Apr 1 0:00 0 - 963# IATA is ambiguous for 1993/1995; go with Shanks. 964Rule Peru 1994 only - Jan 1 0:00 1:00 S 965Rule Peru 1994 only - Apr 1 0:00 0 - 966# Zone NAME GMTOFF RULES FORMAT [UNTIL] 967Zone America/Lima -5:08:12 - LMT 1890 968 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time? 969 -5:00 Peru PE%sT # Peru Time 970 971# South Georgia 972# Zone NAME GMTOFF RULES FORMAT [UNTIL] 973Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken 974 -2:00 - GST # South Georgia Time 975 976# South Sandwich Is 977# uninhabited; scientific personnel have wintered 978 979# Suriname 980# Zone NAME GMTOFF RULES FORMAT [UNTIL] 981Zone America/Paramaribo -3:40:40 - LMT 1911 982 -3:40:52 - PMT 1935 # Paramaribo Mean Time 983 -3:40:36 - PMT 1945 Oct # The capital moved? 984 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time 985 -3:30 - SRT 1984 Oct # Suriname Time 986 -3:00 - SRT 987 988# Trinidad and Tobago 989# Zone NAME GMTOFF RULES FORMAT [UNTIL] 990Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2 991 -4:00 - AST 992 993# Uruguay 994# From Paul Eggert (1993-11-18): 995# Uruguay wins the prize for the strangest peacetime manipulation of the rules. 996# From Shanks: 997# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 998# Whitman gives 1923 Oct 1; go with Shanks. 999Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS 1000Rule Uruguay 1924 1926 - Apr 1 0:00 0 - 1001Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS 1002Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS 1003# Shanks gives 1935 Apr 1 0:00 and 1936 Mar 30 0:00; go with Whitman. 1004Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 - 1005Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS 1006Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 - 1007# Whitman gives 1937 Oct 3; go with Shanks. 1008Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS 1009# Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13, 1010# and 1943 Apr 13 ``to present time''; go with Shanks. 1011Rule Uruguay 1941 only - Aug 1 0:00 0 - 1012Rule Uruguay 1942 only - Jan 1 0:00 0:30 HS 1013Rule Uruguay 1942 only - Dec 14 0:00 1:00 S 1014Rule Uruguay 1943 only - Mar 14 0:00 0 - 1015Rule Uruguay 1959 only - May 24 0:00 1:00 S 1016Rule Uruguay 1959 only - Nov 15 0:00 0 - 1017Rule Uruguay 1960 only - Jan 17 0:00 1:00 S 1018Rule Uruguay 1960 only - Mar 6 0:00 0 - 1019Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S 1020Rule Uruguay 1965 only - Sep 26 0:00 0 - 1021Rule Uruguay 1966 1967 - Oct 31 0:00 0 - 1022Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS 1023Rule Uruguay 1968 1970 - Dec 2 0:00 0 - 1024Rule Uruguay 1972 only - Apr 24 0:00 1:00 S 1025Rule Uruguay 1972 only - Aug 15 0:00 0 - 1026Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS 1027Rule Uruguay 1974 only - Dec 22 0:00 1:00 S 1028Rule Uruguay 1976 only - Oct 1 0:00 0 - 1029Rule Uruguay 1977 only - Dec 4 0:00 1:00 S 1030Rule Uruguay 1978 only - Apr 1 0:00 0 - 1031Rule Uruguay 1979 only - Oct 1 0:00 1:00 S 1032Rule Uruguay 1980 only - May 1 0:00 0 - 1033Rule Uruguay 1987 only - Dec 14 0:00 1:00 S 1034Rule Uruguay 1988 only - Mar 14 0:00 0 - 1035Rule Uruguay 1988 only - Dec 11 0:00 1:00 S 1036Rule Uruguay 1989 only - Mar 12 0:00 0 - 1037Rule Uruguay 1989 only - Oct 29 0:00 1:00 S 1038# Shanks says no DST was observed in 1990/1 and 1991/2, 1039# and that 1992/3's DST was from 10-25 to 03-01. Go with IATA. 1040Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 - 1041Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S 1042Rule Uruguay 1992 only - Oct 18 0:00 1:00 S 1043Rule Uruguay 1993 only - Feb 28 0:00 0 - 1044# From Eduardo Cota (2004-09-20): 1045# The uruguayan government has decreed a change in the local time.... 1046# http://www.presidencia.gub.uy/decretos/2004091502.htm 1047Rule Uruguay 2004 only - Sep 19 0:00 1:00 S 1048# From Steffen Thorsen (2005-03-11): 1049# Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to 1050# save energy ... it was postponed two weeks.... 1051# http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm 1052Rule Uruguay 2005 only - Mar 27 2:00 0 - 1053# From Eduardo Cota (2005-09-27): 1054# http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF 1055# This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at 1056# 02:00 local time, official time in Uruguay will be at GMT -2. 1057Rule Uruguay 2005 only - Oct 9 2:00 1:00 S 1058Rule Uruguay 2006 only - Mar 12 2:00 0 - 1059# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1060Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28 1061 -3:44:44 - MMT 1920 May 1 # Montevideo MT 1062 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time 1063 -3:00 Uruguay UY%sT 1064 1065# Venezuela 1066# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1067Zone America/Caracas -4:27:44 - LMT 1890 1068 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time? 1069 -4:30 - VET 1965 # Venezuela Time 1070 -4:00 - VET
| 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 (1999-07-07): 9# A good source for time zone historical data outside the U.S. is 10# Thomas G. Shanks, The International Atlas (5th edition), 11# San Diego: ACS Publications, Inc. (1999). 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 is the source for entries through 1990, 20# and IATA SSIM is the source for entries after 1990. 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) 95# 96# Shanks stops after 1992-03-01; go with Otero. 97Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 - 98Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S 99# 100# From Hernan G. Otero (1995-06-26): 101# From this moment on, the law that mandated the daylight saving 102# time corrections was derogated and no more modifications 103# to the time zones (for daylight saving) are now made. 104# 105# From Rives McDow (2000-01-10): 106# On October 3, 1999, 0:00 local, Argentina implemented daylight savings time, 107# which did not result in the switch of a time zone, as they stayed 9 hours 108# from the International Date Line. 109Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S 110Rule Arg 2000 only - Mar Sun>=1 0:00 0 - 111# 112# From Peter Gradelski via Steffen Thorsen (2000-03-01): 113# We just checked with our Sao Paulo office and they say the government of 114# Argentina decided not to become one of the countries that go on or off DST. 115# So Buenos Aires should be -3 hours from GMT at all times. 116# 117# From Fabian L. Arce Jofre (2000-04-04): 118# The law that claimed DST for Argentina was derogated by President Fernando 119# de la Rua on March 2, 2000, because it would make people spend more energy 120# in the winter time, rather than less. The change took effect on March 3. 121# 122# From Mariano Absatz (2001-06-06): 123# one of the major newspapers here in Argentina said that the 1999 124# Timezone Law (which never was effectively applied) will (would?) be 125# in effect.... The article is at 126# http://ar.clarin.com/diario/2001-06-06/e-01701.htm 127# ... The Law itself is "Ley No 25155", sanctioned on 1999-08-25, enacted 128# 1999-09-17, and published 1999-09-21. The official publication is at: 129# http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF 130# Regretfully, you have to subscribe (and pay) for the on-line version.... 131# 132# (2001-06-12): 133# the timezone for Argentina will not change next Sunday. 134# Apparently it will do so on Sunday 24th.... 135# http://ar.clarin.com/diario/2001-06-12/s-03501.htm 136# 137# (2001-06-25): 138# Last Friday (yes, the last working day before the date of the change), the 139# Senate annulled the 1999 law that introduced the changes later postponed. 140# http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm 141# It remains the vote of the Deputies..., but it will be the same.... 142# This kind of things had always been done this way in Argentina. 143# We are still -03:00 all year round in all of the country. 144# 145# From Mariano Absatz (2004-05-21): 146# Today it was officially published that the Province of Mendoza is changing 147# its timezone this winter... starting tomorrow night.... 148# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf 149# From Paul Eggert (2004-05-24): 150# It's Law No. 7,210. This change is due to a public power emergency, so for 151# now we'll assume it's for this year only. 152# 153# From Paul Eggert (2002-01-22): 154# <a href="http://www.spicasc.net/horvera.html"> 155# Hora de verano para la Republica Argentina (2000-10-01) 156# </a> says that standard time in Argentina from 1894-10-31 157# to 1920-05-01 was -4:16:48.25. Go with this more-precise value 158# over Shanks. 159# 160# From Mariano Absatz (2004-06-05): 161# These media articles from a major newspaper mostly cover the current state: 162# http://www.lanacion.com.ar/04/05/27/de_604825.asp 163# http://www.lanacion.com.ar/04/05/28/de_605203.asp 164# 165# The following eight (8) provinces pulled clocks back to UTC-04:00 at 166# midnight Monday May 31st. (that is, the night between 05/31 and 06/01). 167# Apparently, all nine provinces would go back to UTC-03:00 at the same 168# time in October 17th. 169# 170# Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz, 171# Tierra del Fuego, Tucuman. 172# 173# From Mariano Absatz (2004-06-14): 174# ... this weekend, the Province of Tucuman decided it'd go back to UTC-03:00 175# yesterday midnight (that is, at 24:00 Saturday 12th), since the people's 176# annoyance with the change is much higher than the power savings obtained.... 177# 178# From Gwillim Law (2004-06-14): 179# http://www.lanacion.com.ar/04/06/10/de_609078.asp ... 180# "The time change in Tierra del Fuego was a conflicted decision from 181# the start. The government had decreed that the measure would take 182# effect on June 1, but a normative error forced the new time to begin 183# three days earlier, from a Saturday to a Sunday.... 184# Our understanding was that the change was originally scheduled to take place 185# on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other 186# provinces). Sunday was May 30, only two days earlier. So the article 187# contains a contradiction. I would give more credence to the Saturday/Sunday 188# date than the "three days earlier" phrase, and conclude that Tierra del 189# Fuego set its clocks back at 2004-05-30 00:00. 190# 191# From Steffen Thorsen (2004-10-05): 192# The previous law 7210 which changed the province of Mendoza's time zone 193# back in May have been modified slightly in a new law 7277, which set the 194# new end date to 2004-09-26 (original date was 2004-10-17). 195# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf 196# 197# From Mariano Absatz (2004-10-05): 198# San Juan changed from UTC-03:00 to UTC-04:00 at midnight between 199# Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00 200# at midnight between Saturday, July 24th and Sunday, July 25th.... 201# http://www.sanjuan.gov.ar/prensa/archivo/000329.html 202# http://www.sanjuan.gov.ar/prensa/archivo/000426.html 203# http://www.sanjuan.gov.ar/prensa/archivo/000441.html 204 205# Unless otherwise specified, data are from Shanks through 1992, from 206# the IATA otherwise. As noted below, Shanks says that 207# America/Cordoba split into 6 subregions during 1991/1992, but we 208# haven't verified this yet so for now we'll keep it a single region. 209# 210# Zone NAME GMTOFF RULES FORMAT [UNTIL] 211# 212# Buenos Aires (BA), Capital Federal (CF), 213Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31 214 -4:16:48 - CMT 1920 May # Cordoba Mean Time 215 -4:00 - ART 1930 Dec 216 -4:00 Arg AR%sT 1969 Oct 5 217 -3:00 Arg AR%sT 1999 Oct 3 218 -4:00 Arg AR%sT 2000 Mar 3 219 -3:00 - ART 220# 221# Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN), Chaco (CC), 222# Formosa (FM), Salta (SA), Santiago del Estero (SE), Cordoba (CB), 223# San Luis (SL), La Pampa (LP), Neuquen (NQ), Rio Negro (RN) 224# 225# Shanks also makes the following claims, which we haven't verified: 226# - Formosa switched to -3:00 on 1991-01-07. 227# - Misiones switched to -3:00 on 1990-12-29. 228# - Chaco switched to -3:00 on 1991-01-04. 229# - San Luis switched to -4:00 on 1990-03-14, then to -3:00 on 1990-10-15, 230# then to -4:00 on 1991-03-01, then to -3:00 on 1991-06-01. 231# - Santiago del Estero switched to -4:00 on 1991-04-01, 232# then to -3:00 on 1991-04-26. 233# 234Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31 235 -4:16:48 - CMT 1920 May 236 -4:00 - ART 1930 Dec 237 -4:00 Arg AR%sT 1969 Oct 5 238 -3:00 Arg AR%sT 1991 Mar 3 239 -4:00 - WART 1991 Oct 20 240 -3:00 Arg AR%sT 1999 Oct 3 241 -4:00 Arg AR%sT 2000 Mar 3 242 -3:00 - ART 243# 244# Tucuman (TM) 245Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31 246 -4:16:48 - CMT 1920 May 247 -4:00 - ART 1930 Dec 248 -4:00 Arg AR%sT 1969 Oct 5 249 -3:00 Arg AR%sT 1991 Mar 3 250 -4:00 - WART 1991 Oct 20 251 -3:00 Arg AR%sT 1999 Oct 3 252 -4:00 Arg AR%sT 2000 Mar 3 253 -3:00 - ART 2004 Jun 1 254 -4:00 - WART 2004 Jun 13 255 -3:00 - ART 256# 257# La Rioja (LR) 258Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31 259 -4:16:48 - CMT 1920 May 260 -4:00 - ART 1930 Dec 261 -4:00 Arg AR%sT 1969 Oct 5 262 -3:00 Arg AR%sT 1991 Mar 1 263 -4:00 - WART 1991 May 7 264 -3:00 Arg AR%sT 1999 Oct 3 265 -4:00 Arg AR%sT 2000 Mar 3 266 -3:00 - ART 2004 Jun 1 267 -4:00 - WART 2004 Jun 20 268 -3:00 - ART 269# 270# San Juan (SJ) 271Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31 272 -4:16:48 - CMT 1920 May 273 -4:00 - ART 1930 Dec 274 -4:00 Arg AR%sT 1969 Oct 5 275 -3:00 Arg AR%sT 1991 Mar 1 276 -4:00 - WART 1991 May 7 277 -3:00 Arg AR%sT 1999 Oct 3 278 -4:00 Arg AR%sT 2000 Mar 3 279 -3:00 - ART 2004 May 31 280 -4:00 - WART 2004 Jul 25 281 -3:00 - ART 282# 283# Jujuy (JY) 284Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31 285 -4:16:48 - CMT 1920 May 286 -4:00 - ART 1930 Dec 287 -4:00 Arg AR%sT 1969 Oct 5 288 -3:00 Arg AR%sT 1990 Mar 4 289 -4:00 - WART 1990 Oct 28 290 -4:00 1:00 WARST 1991 Mar 17 291 -4:00 - WART 1991 Oct 6 292 -3:00 1:00 ARST 1992 293 -3:00 Arg AR%sT 1999 Oct 3 294 -4:00 Arg AR%sT 2000 Mar 3 295 -3:00 - ART 296# 297# Catamarca (CT), Chubut (CH) 298Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31 299 -4:16:48 - CMT 1920 May 300 -4:00 - ART 1930 Dec 301 -4:00 Arg AR%sT 1969 Oct 5 302 -3:00 Arg AR%sT 1991 Mar 3 303 -4:00 - WART 1991 Oct 20 304 -3:00 Arg AR%sT 1999 Oct 3 305 -4:00 Arg AR%sT 2000 Mar 3 306 -3:00 - ART 2004 Jun 1 307 -4:00 - WART 2004 Jun 20 308 -3:00 - ART 309# 310# Mendoza (MZ) 311Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31 312 -4:16:48 - CMT 1920 May 313 -4:00 - ART 1930 Dec 314 -4:00 Arg AR%sT 1969 Oct 5 315 -3:00 Arg AR%sT 1990 Mar 4 316 -4:00 - WART 1990 Oct 15 317 -4:00 1:00 WARST 1991 Mar 1 318 -4:00 - WART 1991 Oct 15 319 -4:00 1:00 WARST 1992 Mar 1 320 -4:00 - WART 1992 Oct 18 321 -3:00 Arg AR%sT 1999 Oct 3 322 -4:00 Arg AR%sT 2000 Mar 3 323 -3:00 - ART 2004 May 23 324 -4:00 - WART 2004 Sep 26 325 -3:00 - ART 326# 327# Santa Cruz (SC) 328Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31 329 -4:16:48 - CMT 1920 May # Cordoba Mean Time 330 -4:00 - ART 1930 Dec 331 -4:00 Arg AR%sT 1969 Oct 5 332 -3:00 Arg AR%sT 1999 Oct 3 333 -4:00 Arg AR%sT 2000 Mar 3 334 -3:00 - ART 2004 Jun 1 335 -4:00 - WART 2004 Jun 20 336 -3:00 - ART 337# 338# Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF) 339Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31 340 -4:16:48 - CMT 1920 May # Cordoba Mean Time 341 -4:00 - ART 1930 Dec 342 -4:00 Arg AR%sT 1969 Oct 5 343 -3:00 Arg AR%sT 1999 Oct 3 344 -4:00 Arg AR%sT 2000 Mar 3 345 -3:00 - ART 2004 May 30 346 -4:00 - WART 2004 Jun 20 347 -3:00 - ART 348 349# Aruba 350# Zone NAME GMTOFF RULES FORMAT [UNTIL] 351Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad 352 -4:30 - ANT 1965 # Netherlands Antilles Time 353 -4:00 - AST 354 355# Bolivia 356# Zone NAME GMTOFF RULES FORMAT [UNTIL] 357Zone America/La_Paz -4:32:36 - LMT 1890 358 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT 359 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST 360 -4:00 - BOT # Bolivia Time 361 362# Brazil 363 364# From Paul Eggert (1993-11-18): 365# The mayor of Rio recently attempted to change the time zone rules 366# just in his city, in order to leave more summer time for the tourist trade. 367# The rule change lasted only part of the day; 368# the federal government refused to follow the city's rules, and business 369# was in a chaos, so the mayor backed down that afternoon. 370 371# From IATA SSIM (1996-02): 372# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS), 373# Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ), 374# Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO), 375# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL]. 376# [The last three states are new to this issue of the IATA SSIM.] 377 378# From Gwillim Law (1996-10-07): 379# Geography, history (Tocantins was part of Goias until 1989), and other 380# sources of time zone information lead me to believe that AL, SE, and TO were 381# always in BR1, and so the only change was whether or not they observed DST.... 382# The earliest issue of the SSIM I have is 2/91. Each issue from then until 383# 9/95 says that DST is observed only in the ten states I quoted from 9/95, 384# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2 385# (UTC-4).... The other two time zones given for Brazil are BR3, which is 386# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is 387# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's 388# become part of the state of Pernambuco). The boundary between BR1 and BR2 389# has never been clearly stated. They've simply been called East and West. 390# However, some conclusions can be drawn from another IATA manual: the Airline 391# Coding Directory, which lists close to 400 airports in Brazil. For each 392# airport it gives a time zone which is coded to the SSIM. From that 393# information, I'm led to conclude that the states of Amapa (AP), Ceara (CE), 394# Maranhao (MA), Paraiba (PR), Pernambuco (PE), Piaui (PI), and Rio Grande do 395# Norte (RN), and the eastern part of Para (PA) are all in BR1 without DST. 396 397# From Marcos Tadeu (1998-09-27): 398# <a href="http://pcdsh01.on.br/verao1.html"> 399# Brazilian official page 400# </a> 401 402# From Jesper Norgaard (2000-11-03): 403# [For an official list of which regions in Brazil use which time zones, see:] 404# http://pcdsh01.on.br/Fusbr.htm 405# http://pcdsh01.on.br/Fusbrhv.htm 406 407# From Celso Doria via David Madeo (2002-10-09): 408# The reason for the delay this year has to do with elections in Brazil. 409# 410# Unlike in the United States, elections in Brazil are 100% computerized and 411# the results are known almost immediately. Yesterday, it was the first 412# round of the elections when 115 million Brazilians voted for President, 413# Governor, Senators, Federal Deputies, and State Deputies. Nobody is 414# counting (or re-counting) votes anymore and we know there will be a second 415# round for the Presidency and also for some Governors. The 2nd round will 416# take place on October 27th. 417# 418# The reason why the DST will only begin November 3rd is that the thousands 419# of electoral machines used cannot have their time changed, and since the 420# Constitution says the elections must begin at 8:00 AM and end at 5:00 PM, 421# the Government decided to postpone DST, instead of changing the Constitution 422# (maybe, for the next elections, it will be possible to change the clock)... 423 424# From Rodrigo Severo (2004-10-04): 425# It's just the biannual change made necessary by the much hyped, supposedly 426# modern Brazilian eletronic voting machines which, apparently, can't deal 427# with a time change between the first and the second rounds of the elections. 428 429# From Paul Eggert (2002-10-10): 430# The official decrees referenced below are mostly taken from 431# <a href="http://pcdsh01.on.br/DecHV.html"> 432# Decretos sobre o Horario de Verao no Brasil 433# </a> (2001-09-20, in Portuguese). 434# The official site for all decrees, including those not related to time, is 435# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/principal_ano.htm"> 436# Presidencia da Republica, Subchefia para Assuntos Juridicos, Decretos 437# </a> (in Portuguese). 438 439# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 440# Decree <a href="http://pcdsh01.on.br/HV20466.htm">20,466</a> (1931-10-01) 441# Decree <a href="http://pcdsh01.on.br/HV21896.htm">21,896</a> (1932-01-10) 442Rule Brazil 1931 only - Oct 3 11:00 1:00 S 443Rule Brazil 1932 1933 - Apr 1 0:00 0 - 444Rule Brazil 1932 only - Oct 3 0:00 1:00 S 445# Decree <a href="http://pcdsh01.on.br/HV23195.htm">23,195</a> (1933-10-10) 446# revoked DST. 447# Decree <a href="http://pcdsh01.on.br/HV27496.htm">27,496</a> (1949-11-24) 448# Decree <a href="http://pcdsh01.on.br/HV27998.htm">27,998</a> (1950-04-13) 449Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S 450Rule Brazil 1950 only - Apr 16 1:00 0 - 451Rule Brazil 1951 1952 - Apr 1 0:00 0 - 452# Decree <a href="http://pcdsh01.on.br/HV32308.htm">32,308</a> (1953-02-24) 453Rule Brazil 1953 only - Mar 1 0:00 0 - 454# Decree <a href="http://pcdsh01.on.br/HV34724.htm">34,724</a> (1953-11-30) 455# revoked DST. 456# Decree <a href="http://pcdsh01.on.br/HV52700.htm">52,700</a> (1963-10-18) 457# established DST from 1963-10-23 00:00 to 1964-02-29 00:00 458# in SP, RJ, GB, MG, ES, due to the prolongation of the drought. 459# Decree <a href="http://pcdsh01.on.br/HV53071.htm">53,071</a> (1963-12-03) 460# extended the above decree to all of the national territory on 12-09. 461Rule Brazil 1963 only - Dec 9 0:00 1:00 S 462# Decree <a href="http://pcdsh01.on.br/HV53604.htm">53,604</a> (1964-02-25) 463# extended summer time by one day to 1964-03-01 00:00 (start of school). 464Rule Brazil 1964 only - Mar 1 0:00 0 - 465# Decree <a href="http://pcdsh01.on.br/HV55639.htm">55,639</a> (1965-01-27) 466Rule Brazil 1965 only - Jan 31 0:00 1:00 S 467Rule Brazil 1965 only - Mar 31 0:00 0 - 468# Decree <a href="http://pcdsh01.on.br/HV57303.htm">57,303</a> (1965-11-22) 469Rule Brazil 1965 only - Dec 1 0:00 1:00 S 470# Decree <a href="http://pcdsh01.on.br/HV57843.htm">57,843</a> (1966-02-18) 471Rule Brazil 1966 1968 - Mar 1 0:00 0 - 472Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S 473# Decree <a href="http://pcdsh01.on.br/HV63429.htm">63,429</a> (1968-10-15) 474# revoked DST. 475# Decree <a href="http://pcdsh01.on.br/HV91698.htm">91,698</a> (1985-09-27) 476Rule Brazil 1985 only - Nov 2 0:00 1:00 S 477# Decree 92,310 (1986-01-21) 478# Decree 92,463 (1986-03-13) 479Rule Brazil 1986 only - Mar 15 0:00 0 - 480# Decree 93,316 (1986-10-01) 481Rule Brazil 1986 only - Oct 25 0:00 1:00 S 482Rule Brazil 1987 only - Feb 14 0:00 0 - 483# Decree <a href="http://pcdsh01.on.br/HV94922.htm">94,922</a> (1987-09-22) 484Rule Brazil 1987 only - Oct 25 0:00 1:00 S 485Rule Brazil 1988 only - Feb 7 0:00 0 - 486# Decree <a href="http://pcdsh01.on.br/HV96676.htm">96,676</a> (1988-09-12) 487# except for the states of AC, AM, PA, RR, RO, and AP (then a territory) 488Rule Brazil 1988 only - Oct 16 0:00 1:00 S 489Rule Brazil 1989 only - Jan 29 0:00 0 - 490# Decree <a href="http://pcdsh01.on.br/HV98077.htm">98,077</a> (1989-08-21) 491# with the same exceptions 492Rule Brazil 1989 only - Oct 15 0:00 1:00 S 493Rule Brazil 1990 only - Feb 11 0:00 0 - 494# Decree <a href="http://pcdsh01.on.br/HV99530.htm">99,530</a> (1990-09-17) 495# adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF. 496# Decree 99,629 (1990-10-19) adds BA, MT. 497Rule Brazil 1990 only - Oct 21 0:00 1:00 S 498Rule Brazil 1991 only - Feb 17 0:00 0 - 499# <a href="http://pcdsh01.on.br/HV1991.htm">Unnumbered decree</a> (1991-09-25) 500# adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF. 501Rule Brazil 1991 only - Oct 20 0:00 1:00 S 502Rule Brazil 1992 only - Feb 9 0:00 0 - 503# <a href="http://pcdsh01.on.br/HV1992.htm">Unnumbered decree</a> (1992-10-16) 504# adopted by same states. 505Rule Brazil 1992 only - Oct 25 0:00 1:00 S 506Rule Brazil 1993 only - Jan 31 0:00 0 - 507# Decree <a href="http://pcdsh01.on.br/HV942.htm">942</a> (1993-09-28) 508# adopted by same states, plus AM. 509# Decree <a href="http://pcdsh01.on.br/HV1252.htm">1,252</a> (1994-09-22; 510# web page corrected 2004-01-07) adopted by same states, minus AM. 511# Decree <a href="http://pcdsh01.on.br/HV1636.htm">1,636</a> (1995-09-14) 512# adopted by same states, plus MT and TO. 513# Decree <a href="http://pcdsh01.on.br/HV1674.htm">1,674</a> (1995-10-13) 514# adds AL, SE. 515Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S 516Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 - 517Rule Brazil 1996 only - Feb 11 0:00 0 - 518# Decree <a href="http://pcdsh01.on.br/HV2000.htm">2,000</a> (1996-09-04) 519# adopted by same states, minus AL, SE. 520Rule Brazil 1996 only - Oct 6 0:00 1:00 S 521Rule Brazil 1997 only - Feb 16 0:00 0 - 522# From Daniel C. Sobral (1998-02-12): 523# In 1997, the DS began on October 6. The stated reason was that 524# because international television networks ignored Brazil's policy on DS, 525# they bought the wrong times on satellite for coverage of Pope's visit. 526# This year, the ending date of DS was postponed to March 1 527# to help dealing with the shortages of electric power. 528# 529# Decree 2,317 (1997-09-04), adopted by same states. 530Rule Brazil 1997 only - Oct 6 0:00 1:00 S 531# Decree <a href="http://pcdsh01.on.br/figuras/HV2495.JPG">2,495</a> 532# (1998-02-10) 533Rule Brazil 1998 only - Mar 1 0:00 0 - 534# Decree <a href="http://pcdsh01.on.br/figuras/Hv98.jpg">2,780</a> (1998-09-11) 535# adopted by the same states as before. 536Rule Brazil 1998 only - Oct 11 0:00 1:00 S 537Rule Brazil 1999 only - Feb 21 0:00 0 - 538# Decree <a href="http://pcdsh01.on.br/figuras/HV3150.gif">3,150</a> 539# (1999-08-23) adopted by same states. 540# Decree <a href="http://pcdsh01.on.br/DecHV99.gif">3,188</a> (1999-09-30) 541# adds SE, AL, PB, PE, RN, CE, PI, MA and RR. 542Rule Brazil 1999 only - Oct 3 0:00 1:00 S 543Rule Brazil 2000 only - Feb 27 0:00 0 - 544# Decree <a href="http://pcdsh01.on.br/DEC3592.htm">3,592</a> (2000-09-06) 545# adopted by the same states as before. 546# Decree <a href="http://pcdsh01.on.br/Dec3630.jpg">3,630</a> (2000-10-13) 547# repeals DST in PE and RR, effective 2000-10-15 00:00. 548# Decree <a href="http://pcdsh01.on.br/Dec3632.jpg">3,632</a> (2000-10-17) 549# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00. 550# Decree <a href="http://pcdsh01.on.br/figuras/HV3916.gif">3,916</a> 551# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE. 552Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S 553Rule Brazil 2001 max - Feb Sun>=15 0:00 0 - 554# Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE. 555# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm"></a> 556Rule Brazil 2002 only - Nov 3 0:00 1:00 S 557# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO. 558# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm"></a> 559Rule Brazil 2003 only - Oct 19 0:00 1:00 S 560# Decree 5,223 (2004-10-01) reestablishes DST in MT. 561# <a href="http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm"></a> 562Rule Brazil 2004 only - Nov 2 0:00 1:00 S 563# Decree <a href="http://pcdsh01.on.br/DecHV5539.gif">5,539</a> (2005-09-19), 564# adopted by the same states as before. 565Rule Brazil 2005 max - Oct Sun>=15 0:00 1:00 S 566# The latest ruleset listed above says that the following states observe DST: 567# DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP. 568# For dates after mid-2006, the above rules with TO="max" are guesses 569# and are quite possibly wrong, but are more likely than no DST at all. 570 571 572# Zone NAME GMTOFF RULES FORMAT [UNTIL] 573# 574# Fernando de Noronha (administratively part of PE) 575Zone America/Noronha -2:09:40 - LMT 1914 576 -2:00 Brazil FN%sT 1990 Sep 17 577 -2:00 - FNT 1999 Sep 30 578 -2:00 Brazil FN%sT 2000 Oct 15 579 -2:00 - FNT 2001 Sep 13 580 -2:00 Brazil FN%sT 2002 Oct 1 581 -2:00 - FNT 582# Other Atlantic islands have no permanent settlement. 583# These include Trindade and Martin Vaz (administratively part of ES), 584# Atol das Rocas (RN), and Penedos de Sao Pedro e Sao Paulo (PE). 585# Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01; 586# it also included the Penedos. 587# 588# Amapa (AP), east Para (PA) 589# East Para includes Belem, Maraba, Serra Norte, and Sao Felix do Xingu. 590# The division between east and west Para is the river Xingu. 591# In the north a very small part from the river Javary (now Jari I guess, 592# the border with Amapa) to the Amazon, then to the Xingu. 593Zone America/Belem -3:13:56 - LMT 1914 594 -3:00 Brazil BR%sT 1988 Sep 12 595 -3:00 - BRT 596# 597# Maranhao (MA), Piaui (PI), Ceara (CE), Rio Grande do Norte (RN), 598# Paraiba (PB) 599Zone America/Fortaleza -2:34:00 - LMT 1914 600 -3:00 Brazil BR%sT 1990 Sep 17 601 -3:00 - BRT 1999 Sep 30 602 -3:00 Brazil BR%sT 2000 Oct 22 603 -3:00 - BRT 2001 Sep 13 604 -3:00 Brazil BR%sT 2002 Oct 1 605 -3:00 - BRT 606# 607# Pernambuco (PE) (except Atlantic islands) 608Zone America/Recife -2:19:36 - LMT 1914 609 -3:00 Brazil BR%sT 1990 Sep 17 610 -3:00 - BRT 1999 Sep 30 611 -3:00 Brazil BR%sT 2000 Oct 15 612 -3:00 - BRT 2001 Sep 13 613 -3:00 Brazil BR%sT 2002 Oct 1 614 -3:00 - BRT 615# 616# Tocantins (TO) 617Zone America/Araguaina -3:12:48 - LMT 1914 618 -3:00 Brazil BR%sT 1990 Sep 17 619 -3:00 - BRT 1995 Sep 14 620 -3:00 Brazil BR%sT 2003 Sep 24 621 -3:00 - BRT 622# 623# Alagoas (AL), Sergipe (SE) 624Zone America/Maceio -2:22:52 - LMT 1914 625 -3:00 Brazil BR%sT 1990 Sep 17 626 -3:00 - BRT 1995 Oct 13 627 -3:00 Brazil BR%sT 1996 Sep 4 628 -3:00 - BRT 1999 Sep 30 629 -3:00 Brazil BR%sT 2000 Oct 22 630 -3:00 - BRT 2001 Sep 13 631 -3:00 Brazil BR%sT 2002 Oct 1 632 -3:00 - BRT 633# 634# Bahia (BA) 635# There are too many Salvadors elsewhere, so use America/Bahia instead 636# of America/Salvador. 637Zone America/Bahia -2:34:04 - LMT 1914 638 -3:00 Brazil BR%sT 2003 Sep 24 639 -3:00 - BRT 640# 641# Goias (GO), Distrito Federal (DF), Minas Gerais (MG), 642# Espirito Santo (ES), Rio de Janeiro (RJ), Sao Paulo (SP), Parana (PR), 643# Santa Catarina (SC), Rio Grande do Sul (RS) 644Zone America/Sao_Paulo -3:06:28 - LMT 1914 645 -3:00 Brazil BR%sT 1963 Oct 23 00:00 646 -3:00 1:00 BRST 1964 647 -3:00 Brazil BR%sT 648# 649# Mato Grosso do Sul (MS) 650Zone America/Campo_Grande -3:38:28 - LMT 1914 651 -4:00 Brazil AM%sT 652# 653# Mato Grosso (MT) 654Zone America/Cuiaba -3:44:20 - LMT 1914 655 -4:00 Brazil AM%sT 2003 Sep 24 656 -4:00 - AMT 2004 Oct 1 657 -4:00 Brazil AM%sT 658# 659# west Para (PA), Rondonia (RO) 660# West Para includes Altamira, Oribidos, Prainha, Oriximina, and Santarem. 661Zone America/Porto_Velho -4:15:36 - LMT 1914 662 -4:00 Brazil AM%sT 1988 Sep 12 663 -4:00 - AMT 664# 665# Roraima (RR) 666Zone America/Boa_Vista -4:02:40 - LMT 1914 667 -4:00 Brazil AM%sT 1988 Sep 12 668 -4:00 - AMT 1999 Sep 30 669 -4:00 Brazil AM%sT 2000 Oct 15 670 -4:00 - AMT 671# 672# east Amazonas (AM): Boca do Acre, Jutai, Manaus, Floriano Peixoto 673# The great circle line from Tabatinga to Porto Acre divides 674# east from west Amazonas. 675Zone America/Manaus -4:00:04 - LMT 1914 676 -4:00 Brazil AM%sT 1988 Sep 12 677 -4:00 - AMT 1993 Sep 28 678 -4:00 Brazil AM%sT 1994 Sep 22 679 -4:00 - AMT 680# 681# west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant, 682# Eirunepe, Envira, Ipixuna 683Zone America/Eirunepe -4:39:28 - LMT 1914 684 -5:00 Brazil AC%sT 1988 Sep 12 685 -5:00 - ACT 1993 Sep 28 686 -5:00 Brazil AC%sT 1994 Sep 22 687 -5:00 - ACT 688# 689# Acre (AC) 690Zone America/Rio_Branco -4:31:12 - LMT 1914 691 -5:00 Brazil AC%sT 1988 Sep 12 692 -5:00 - ACT 693 694 695# Chile 696 697# From Eduardo Krell (1995-10-19): 698# The law says to switch to DST at midnight [24:00] on the second SATURDAY 699# of October.... The law is the same for March and October. 700# (1998-09-29): 701# Because of the drought this year, the government decided to go into 702# DST earlier (saturday 9/26 at 24:00). This is a one-time change only ... 703# (unless there's another dry season next year, I guess). 704 705# From Julio I. Pacheco Troncoso (1999-03-18): 706# Because of the same drought, the government decided to end DST later, 707# on April 3, (one-time change). 708 709# From Gwillim Law (2001-05-04): 710# I came across another article in "La Tercera" about Chilean DST. 711# <http://www.tercera.cl/diario/2000/10/13/t-extras.html> 712# It clearly confirms my earlier suggestion, that DST begins at 22:00 713# on Easter Island.... But it also seems to be saying that the 714# observance of DST in Chile began in 1966, rather than 1969 as 715# ... [Shanks] has it.... 716# 717# My translation: 718# 719# "The Chilean Army has announced that summer time will begin tomorrow, 720# Saturday, October 14 in continental Chile, insular Chile, and 721# Antarctica, as provided by Supreme Decree 25 of January 11, 1966. 722# By the preceding, official time in continental Chile and Chilean 723# Antarctic, and official time in Western Insular Chile, which applies 724# to Easter Island and Sala y Gomez Island, will be set forward at 725# midnight and at 22:00, respectively, by 20 minutes." 726 727# From Paul Eggert (2001-05-04): 728# Go with this article in preference to Shanks's 1969 date for modern DST. 729# Assume this rule has been used since DST was introduced in the islands. 730 731# From Paul Eggert (2002-10-24): 732# <http://www.shoa.cl/shoa/faqhoraoficial.htm> gives many details that 733# disagree with the following table, but we haven't had time to compare them. 734 735# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 736Rule Chile 1918 only - Sep 1 0:00 1:00 S 737Rule Chile 1919 only - Jul 2 0:00 0 - 738Rule Chile 1927 1931 - Sep 1 0:00 1:00 S 739Rule Chile 1928 1932 - Apr 1 0:00 0 - 740Rule Chile 1966 1997 - Oct Sun>=9 4:00u 1:00 S 741Rule Chile 1967 1998 - Mar Sun>=9 3:00u 0 - 742Rule Chile 1998 only - Sep 27 4:00u 1:00 S 743Rule Chile 1999 only - Apr 4 3:00u 0 - 744Rule Chile 1999 max - Oct Sun>=9 4:00u 1:00 S 745Rule Chile 2000 max - Mar Sun>=9 3:00u 0 - 746# IATA SSIM anomalies: (1990-09) says 1990-09-16; (1992-02) says 1992-03-14; 747# (1996-09) says 1998-03-08. Ignore these. 748# Zone NAME GMTOFF RULES FORMAT [UNTIL] 749Zone America/Santiago -4:42:40 - LMT 1890 750 -4:42:40 - SMT 1910 # Santiago Mean Time 751 -5:00 Chile CL%sT 1932 Sep # Chile Time 752 -4:00 Chile CL%sT 753Zone Pacific/Easter -7:17:28 - LMT 1890 # Mataveri 754 -7:17:28 - MMT 1932 Sep # Mataveri Mean Time 755 -7:00 Chile EAS%sT 1982 Mar 14 # Easter I Time 756 -6:00 Chile EAS%sT 757# 758# Sala y Gomez Island is like Pacific/Easter. 759# Other Chilean locations, including Juan Fernandez Is, San Ambrosio, 760# San Felix, and Antarctic bases, are like America/Santiago. 761 762# Colombia 763# Shanks specifies 24:00 for 1992 transition times; go with IATA, 764# as it seems implausible to change clocks at midnight New Year's Eve. 765# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 766Rule CO 1992 only - May 2 0:00 1:00 S 767Rule CO 1992 only - Dec 31 0:00 0 - 768# Zone NAME GMTOFF RULES FORMAT [UNTIL] 769Zone America/Bogota -4:56:20 - LMT 1884 Mar 13 770 -4:56:20 - BMT 1914 Nov 23 # Bogota Mean Time 771 -5:00 CO CO%sT # Colombia Time 772# Malpelo, Providencia, San Andres 773# no information; probably like America/Bogota 774 775# Curacao 776# Shanks says that Bottom and Oranjestad have been at -4:00 since 777# standard time was introduced on 1912-03-02; and that Kralendijk and Rincon 778# used Kralendijk Mean Time (-4:33:08) from 1912-02-02 to 1965-01-01. 779# This all predates our 1970 cutoff, though. 780# Zone NAME GMTOFF RULES FORMAT [UNTIL] 781Zone America/Curacao -4:35:44 - LMT 1912 Feb 12 # Willemstad 782 -4:30 - ANT 1965 # Netherlands Antilles Time 783 -4:00 - AST 784 785# Ecuador 786# Zone NAME GMTOFF RULES FORMAT [UNTIL] 787Zone America/Guayaquil -5:19:20 - LMT 1890 788 -5:14:00 - QMT 1931 # Quito Mean Time 789 -5:00 - ECT # Ecuador Time 790Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno 791 -5:00 - ECT 1986 792 -6:00 - GALT # Galapagos Time 793 794# Falklands 795 796# From Paul Eggert (2001-03-05): 797# Between 1990 and 2000 inclusive, Shanks and the IATA agree except 798# the IATA gives 1996-09-08. Go with Shanks. 799 800# From Falkland Islands Government Office, London (2001-01-22) 801# via Jesper Norgaard: 802# ... the clocks revert back to Local Mean Time at 2 am on Sunday 15 803# April 2001 and advance one hour to summer time at 2 am on Sunday 2 804# September. It is anticipated that the clocks will revert back at 2 805# am on Sunday 21 April 2002 and advance to summer time at 2 am on 806# Sunday 1 September. 807 808# From Rives McDow (2001-02-13): 809# 810# I have communicated several times with people there, and the last 811# time I had communications that was helpful was in 1998. Here is 812# what was said then: 813# 814# "The general rule was that Stanley used daylight saving and the Camp 815# did not. However for various reasons many people in the Camp have 816# started to use daylight saving (known locally as 'Stanley Time') 817# There is no rule as to who uses daylight saving - it is a matter of 818# personal choice and so it is impossible to draw a map showing who 819# uses it and who does not. Any list would be out of date as soon as 820# it was produced. This year daylight saving ended on April 18/19th 821# and started again on September 12/13th. I do not know what the rule 822# is, but can find out if you like. We do not change at the same time 823# as UK or Chile." 824# 825# I did have in my notes that the rule was "Second Saturday in Sep at 826# 0:00 until third Saturday in Apr at 0:00". I think that this does 827# not agree in some cases with Shanks; is this true? 828# 829# Also, there is no mention in the list that some areas in the 830# Falklands do not use DST. I have found in my communications there 831# that these areas are on the western half of East Falkland and all of 832# West Falkland. Stanley is the only place that consistently observes 833# DST. Again, as in other places in the world, the farmers don't like 834# it. West Falkland is almost entirely sheep farmers. 835# 836# I know one lady there that keeps a list of which farm keeps DST and 837# which doesn't each year. She runs a shop in Stanley, and says that 838# the list changes each year. She uses it to communicate to her 839# customers, catching them when they are home for lunch or dinner. 840 841# From Paul Eggert (2001-03-05): 842# For now, we'll just record the time in Stanley, since we have no 843# better info. 844 845# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 846Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S 847Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 - 848Rule Falk 1939 only - Oct 1 0:00 1:00 S 849Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S 850Rule Falk 1943 only - Jan 1 0:00 0 - 851Rule Falk 1983 only - Sep lastSun 0:00 1:00 S 852Rule Falk 1984 1985 - Apr lastSun 0:00 0 - 853Rule Falk 1984 only - Sep 16 0:00 1:00 S 854Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S 855Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 - 856Rule Falk 2001 max - Apr Sun>=15 2:00 0 - 857Rule Falk 2001 max - Sep Sun>=1 2:00 1:00 S 858# Zone NAME GMTOFF RULES FORMAT [UNTIL] 859Zone Atlantic/Stanley -3:51:24 - LMT 1890 860 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time 861 -4:00 Falk FK%sT 1983 May # Falkland Is Time 862 -3:00 Falk FK%sT 1985 Sep 15 863 -4:00 Falk FK%sT 864 865# French Guiana 866# Zone NAME GMTOFF RULES FORMAT [UNTIL] 867Zone America/Cayenne -3:29:20 - LMT 1911 Jul 868 -4:00 - GFT 1967 Oct # French Guiana Time 869 -3:00 - GFT 870 871# Guyana 872# Zone NAME GMTOFF RULES FORMAT [UNTIL] 873Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown 874 -3:45 - GBGT 1966 May 26 # Br Guiana Time 875 -3:45 - GYT 1975 Jul 31 # Guyana Time 876 -3:00 - GYT 1991 877# IATA SSIM (1996-06) says -4:00. Assume a 1991 switch. 878 -4:00 - GYT 879 880# Paraguay 881# From Paul Eggert (1999-10-29): 882# Shanks (1999) says that spring transitions are from 01:00 -> 02:00, 883# and autumn transitions are from 00:00 -> 23:00. Go with earlier 884# editions of Shanks, and with the IATA, who say transitions occur at 00:00. 885# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 886Rule Para 1975 1988 - Oct 1 0:00 1:00 S 887Rule Para 1975 1978 - Mar 1 0:00 0 - 888Rule Para 1979 1991 - Apr 1 0:00 0 - 889Rule Para 1989 only - Oct 22 0:00 1:00 S 890Rule Para 1990 only - Oct 1 0:00 1:00 S 891Rule Para 1991 only - Oct 6 0:00 1:00 S 892Rule Para 1992 only - Mar 1 0:00 0 - 893Rule Para 1992 only - Oct 5 0:00 1:00 S 894Rule Para 1993 only - Mar 31 0:00 0 - 895Rule Para 1993 1995 - Oct 1 0:00 1:00 S 896Rule Para 1994 1995 - Feb lastSun 0:00 0 - 897Rule Para 1996 only - Mar 1 0:00 0 - 898# IATA SSIM (2000-02) says 1999-10-10; ignore this for now. 899# From Steffen Thorsen (2000-10-02): 900# I have three independent reports that Paraguay changed to DST this Sunday 901# (10-01). 902# 903# Translated by Gwillim Law (2001-02-27) from 904# <a href="http://www.diarionoticias.com.py/011000/nacional/naciona1.htm"> 905# Noticias, a daily paper in Asuncion, Paraguay (2000-10-01) 906# </a>: 907# Starting at 0:00 today, the clock will be set forward 60 minutes, in 908# fulfillment of Decree No. 7,273 of the Executive Power.... The time change 909# system has been operating for several years. Formerly there was a separate 910# decree each year; the new law has the same effect, but permanently. Every 911# year, the time will change on the first Sunday of October; likewise, the 912# clock will be set back on the first Sunday of March. 913# 914# From Jesper Norgaard (2001-03-06) [an official URL saying similar things]: 915# http://gateway.abc.com.py:8000/pub/pag04.mbr/artic?FHA=2001-03-03-02.24.52.900592 916# 917Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S 918# IATA SSIM (1997-09) says Mar 1; go with Shanks. 919Rule Para 1997 only - Feb lastSun 0:00 0 - 920# Shanks says 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but 921# (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27). 922Rule Para 1998 2001 - Mar Sun>=1 0:00 0 - 923# From Rives McDow (2002-02-28): 924# A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the 925# dst method to be from the first Sunday in September to the first Sunday in 926# April. 927Rule Para 2002 2004 - Apr Sun>=1 0:00 0 - 928Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S 929# 930# From Jesper Norgaard Welen (2005-01-02): 931# There are several sources that claim that Paraguay made 932# a timezone rule change in autumn 2004. 933# From Steffen Thorsen (2005-01-05): 934# Decree 1,867 (2004-03-05) <http://www.labor.com.py/noticias.asp?id=27> 935Rule Para 2004 max - Oct Sun>=15 0:00 1:00 S 936Rule Para 2005 max - Mar Sun>=8 0:00 0 - 937 938# Zone NAME GMTOFF RULES FORMAT [UNTIL] 939Zone America/Asuncion -3:50:40 - LMT 1890 940 -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time 941 -4:00 - PYT 1972 Oct # Paraguay Time 942 -3:00 - PYT 1974 Apr 943 -4:00 Para PY%sT 944 945# Peru 946# 947# <a href="news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net"> 948# From Evelyn C. Leeper via Mark Brader (2003-10-26):</a> 949# When we were in Peru in 1985-1986, they apparently switched over 950# sometime between December 29 and January 3 while we were on the Amazon. 951# 952# From Paul Eggert (2003-11-02): 953# Shanks doesn't have this transition. Assume 1986 was like 1987. 954 955# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 956Rule Peru 1938 only - Jan 1 0:00 1:00 S 957Rule Peru 1938 only - Apr 1 0:00 0 - 958Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S 959Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 - 960Rule Peru 1986 1987 - Jan 1 0:00 1:00 S 961Rule Peru 1986 1987 - Apr 1 0:00 0 - 962Rule Peru 1990 only - Jan 1 0:00 1:00 S 963Rule Peru 1990 only - Apr 1 0:00 0 - 964# IATA is ambiguous for 1993/1995; go with Shanks. 965Rule Peru 1994 only - Jan 1 0:00 1:00 S 966Rule Peru 1994 only - Apr 1 0:00 0 - 967# Zone NAME GMTOFF RULES FORMAT [UNTIL] 968Zone America/Lima -5:08:12 - LMT 1890 969 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time? 970 -5:00 Peru PE%sT # Peru Time 971 972# South Georgia 973# Zone NAME GMTOFF RULES FORMAT [UNTIL] 974Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken 975 -2:00 - GST # South Georgia Time 976 977# South Sandwich Is 978# uninhabited; scientific personnel have wintered 979 980# Suriname 981# Zone NAME GMTOFF RULES FORMAT [UNTIL] 982Zone America/Paramaribo -3:40:40 - LMT 1911 983 -3:40:52 - PMT 1935 # Paramaribo Mean Time 984 -3:40:36 - PMT 1945 Oct # The capital moved? 985 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time 986 -3:30 - SRT 1984 Oct # Suriname Time 987 -3:00 - SRT 988 989# Trinidad and Tobago 990# Zone NAME GMTOFF RULES FORMAT [UNTIL] 991Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2 992 -4:00 - AST 993 994# Uruguay 995# From Paul Eggert (1993-11-18): 996# Uruguay wins the prize for the strangest peacetime manipulation of the rules. 997# From Shanks: 998# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 999# Whitman gives 1923 Oct 1; go with Shanks. 1000Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS 1001Rule Uruguay 1924 1926 - Apr 1 0:00 0 - 1002Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS 1003Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS 1004# Shanks gives 1935 Apr 1 0:00 and 1936 Mar 30 0:00; go with Whitman. 1005Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 - 1006Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS 1007Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 - 1008# Whitman gives 1937 Oct 3; go with Shanks. 1009Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS 1010# Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13, 1011# and 1943 Apr 13 ``to present time''; go with Shanks. 1012Rule Uruguay 1941 only - Aug 1 0:00 0 - 1013Rule Uruguay 1942 only - Jan 1 0:00 0:30 HS 1014Rule Uruguay 1942 only - Dec 14 0:00 1:00 S 1015Rule Uruguay 1943 only - Mar 14 0:00 0 - 1016Rule Uruguay 1959 only - May 24 0:00 1:00 S 1017Rule Uruguay 1959 only - Nov 15 0:00 0 - 1018Rule Uruguay 1960 only - Jan 17 0:00 1:00 S 1019Rule Uruguay 1960 only - Mar 6 0:00 0 - 1020Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S 1021Rule Uruguay 1965 only - Sep 26 0:00 0 - 1022Rule Uruguay 1966 1967 - Oct 31 0:00 0 - 1023Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS 1024Rule Uruguay 1968 1970 - Dec 2 0:00 0 - 1025Rule Uruguay 1972 only - Apr 24 0:00 1:00 S 1026Rule Uruguay 1972 only - Aug 15 0:00 0 - 1027Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS 1028Rule Uruguay 1974 only - Dec 22 0:00 1:00 S 1029Rule Uruguay 1976 only - Oct 1 0:00 0 - 1030Rule Uruguay 1977 only - Dec 4 0:00 1:00 S 1031Rule Uruguay 1978 only - Apr 1 0:00 0 - 1032Rule Uruguay 1979 only - Oct 1 0:00 1:00 S 1033Rule Uruguay 1980 only - May 1 0:00 0 - 1034Rule Uruguay 1987 only - Dec 14 0:00 1:00 S 1035Rule Uruguay 1988 only - Mar 14 0:00 0 - 1036Rule Uruguay 1988 only - Dec 11 0:00 1:00 S 1037Rule Uruguay 1989 only - Mar 12 0:00 0 - 1038Rule Uruguay 1989 only - Oct 29 0:00 1:00 S 1039# Shanks says no DST was observed in 1990/1 and 1991/2, 1040# and that 1992/3's DST was from 10-25 to 03-01. Go with IATA. 1041Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 - 1042Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S 1043Rule Uruguay 1992 only - Oct 18 0:00 1:00 S 1044Rule Uruguay 1993 only - Feb 28 0:00 0 - 1045# From Eduardo Cota (2004-09-20): 1046# The uruguayan government has decreed a change in the local time.... 1047# http://www.presidencia.gub.uy/decretos/2004091502.htm 1048Rule Uruguay 2004 only - Sep 19 0:00 1:00 S 1049# From Steffen Thorsen (2005-03-11): 1050# Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to 1051# save energy ... it was postponed two weeks.... 1052# http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm 1053Rule Uruguay 2005 only - Mar 27 2:00 0 - 1054# From Eduardo Cota (2005-09-27): 1055# http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF 1056# This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at 1057# 02:00 local time, official time in Uruguay will be at GMT -2. 1058Rule Uruguay 2005 only - Oct 9 2:00 1:00 S 1059Rule Uruguay 2006 only - Mar 12 2:00 0 - 1060# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1061Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28 1062 -3:44:44 - MMT 1920 May 1 # Montevideo MT 1063 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time 1064 -3:00 Uruguay UY%sT 1065 1066# Venezuela 1067# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1068Zone America/Caracas -4:27:44 - LMT 1890 1069 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time? 1070 -4:30 - VET 1965 # Venezuela Time 1071 -4:00 - VET
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