1 # 2 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 # 4 # This code is free software; you can redistribute it and/or modify it 5 # under the terms of the GNU General Public License version 2 only, as 6 # published by the Free Software Foundation. Oracle designates this 7 # particular file as subject to the "Classpath" exception as provided 8 # by Oracle in the LICENSE file that accompanied this code. 9 # 10 # This code is distributed in the hope that it will be useful, but WITHOUT 11 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 # version 2 for more details (a copy is included in the LICENSE file that 14 # accompanied this code). 15 # 16 # You should have received a copy of the GNU General Public License version 17 # 2 along with this work; if not, write to the Free Software Foundation, 18 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 # 20 # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 # or visit www.oracle.com if you need additional information or have any 22 # questions. 23 # 24 # This file is in the public domain, so clarified as of 25 # 2009-05-17 by Arthur David Olson. 26 27 # This file is by no means authoritative; if you think you know better, 28 # go ahead and edit the file (and please send any changes to 29 # tz@iana.org for general use in the future). For more, please see 30 # the file CONTRIBUTING in the tz distribution. 31 32 # From Paul Eggert (2016-12-05): 33 # 34 # Unless otherwise specified, the source for data through 1990 is: 35 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 36 # San Diego: ACS Publications, Inc. (2003). 37 # Unfortunately this book contains many errors and cites no sources. 38 # 39 # Many years ago Gwillim Law wrote that a good source 40 # for time zone data was the International Air Transport 41 # Association's Standard Schedules Information Manual (IATA SSIM), 42 # published semiannually. Law sent in several helpful summaries 43 # of the IATA's data after 1990. Except where otherwise noted, 44 # IATA SSIM is the source for entries after 1990. 45 # 46 # For data circa 1899, a common source is: 47 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94. 48 # https://www.jstor.org/stable/1774359 49 # 50 # These tables use numeric abbreviations like -03 and -0330 for 51 # integer hour and minute UT offsets. Although earlier editions used 52 # alphabetic time zone abbreviations, these abbreviations were 53 # invented and did not reflect common practice. 54 55 ############################################################################### 56 57 ############################################################################### 58 59 # Argentina 60 61 # From Bob Devine (1988-01-28): 62 # Argentina: first Sunday in October to first Sunday in April since 1976. 63 # Double Summer time from 1969 to 1974. Switches at midnight. 64 65 # From U. S. Naval Observatory (1988-01-19): 66 # ARGENTINA 3 H BEHIND UTC 67 68 # From Hernan G. Otero (1995-06-26): 69 # I am sending modifications to the Argentine time zone table... 70 # AR was chosen because they are the ISO letters that represent Argentina. 71 72 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 73 Rule Arg 1930 only - Dec 1 0:00 1:00 S 74 Rule Arg 1931 only - Apr 1 0:00 0 - 75 Rule Arg 1931 only - Oct 15 0:00 1:00 S 76 Rule Arg 1932 1940 - Mar 1 0:00 0 - 77 Rule Arg 1932 1939 - Nov 1 0:00 1:00 S 78 Rule Arg 1940 only - Jul 1 0:00 1:00 S 79 Rule Arg 1941 only - Jun 15 0:00 0 - 80 Rule Arg 1941 only - Oct 15 0:00 1:00 S 81 Rule Arg 1943 only - Aug 1 0:00 0 - 82 Rule Arg 1943 only - Oct 15 0:00 1:00 S 83 Rule Arg 1946 only - Mar 1 0:00 0 - 84 Rule Arg 1946 only - Oct 1 0:00 1:00 S 85 Rule Arg 1963 only - Oct 1 0:00 0 - 86 Rule Arg 1963 only - Dec 15 0:00 1:00 S 87 Rule Arg 1964 1966 - Mar 1 0:00 0 - 88 Rule Arg 1964 1966 - Oct 15 0:00 1:00 S 89 Rule Arg 1967 only - Apr 2 0:00 0 - 90 Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S 91 Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 - 92 Rule Arg 1974 only - Jan 23 0:00 1:00 S 93 Rule Arg 1974 only - May 1 0:00 0 - 94 Rule Arg 1988 only - Dec 1 0:00 1:00 S 95 # 96 # From Hernan G. Otero (1995-06-26): 97 # These corrections were contributed by InterSoft Argentina S.A., 98 # obtaining the data from the: 99 # Talleres de Hidrografía Naval Argentina 100 # (Argentine Naval Hydrography Institute) 101 Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 - 102 Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S 103 # 104 # From Hernan G. Otero (1995-06-26): 105 # From this moment on, the law that mandated the daylight saving 106 # time corrections was derogated and no more modifications 107 # to the time zones (for daylight saving) are now made. 108 # 109 # From Rives McDow (2000-01-10): 110 # On October 3, 1999, 0:00 local, Argentina implemented daylight savings time, 111 # which did not result in the switch of a time zone, as they stayed 9 hours 112 # from the International Date Line. 113 Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S 114 # From Paul Eggert (2007-12-28): 115 # DST was set to expire on March 5, not March 3, but since it was converted 116 # to standard time on March 3 it's more convenient for us to pretend that 117 # it ended on March 3. 118 Rule Arg 2000 only - Mar 3 0:00 0 - 119 # 120 # From Peter Gradelski via Steffen Thorsen (2000-03-01): 121 # We just checked with our São Paulo office and they say the government of 122 # Argentina decided not to become one of the countries that go on or off DST. 123 # So Buenos Aires should be -3 hours from GMT at all times. 124 # 125 # From Fabián L. Arce Jofré (2000-04-04): 126 # The law that claimed DST for Argentina was derogated by President Fernando 127 # de la Rúa on March 2, 2000, because it would make people spend more energy 128 # in the winter time, rather than less. The change took effect on March 3. 129 # 130 # From Mariano Absatz (2001-06-06): 131 # one of the major newspapers here in Argentina said that the 1999 132 # Timezone Law (which never was effectively applied) will (would?) be 133 # in effect.... The article is at 134 # http://ar.clarin.com/diario/2001-06-06/e-01701.htm 135 # ... The Law itself is "Ley No. 25155", sanctioned on 1999-08-25, enacted 136 # 1999-09-17, and published 1999-09-21. The official publication is at: 137 # http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF 138 # Regretfully, you have to subscribe (and pay) for the on-line version.... 139 # 140 # (2001-06-12): 141 # the timezone for Argentina will not change next Sunday. 142 # Apparently it will do so on Sunday 24th.... 143 # http://ar.clarin.com/diario/2001-06-12/s-03501.htm 144 # 145 # (2001-06-25): 146 # Last Friday (yes, the last working day before the date of the change), the 147 # Senate annulled the 1999 law that introduced the changes later postponed. 148 # http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm 149 # It remains the vote of the Deputies..., but it will be the same.... 150 # This kind of things had always been done this way in Argentina. 151 # We are still -03:00 all year round in all of the country. 152 # 153 # From Steffen Thorsen (2007-12-21): 154 # A user (Leonardo Chaim) reported that Argentina will adopt DST.... 155 # all of the country (all Zone-entries) are affected. News reports like 156 # http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate 157 # that Argentina will use DST next year as well, from October to 158 # March, although exact rules are not given. 159 # 160 # From Jesper Nørgaard Welen (2007-12-26) 161 # The last hurdle of Argentina DST is over, the proposal was approved in 162 # the lower chamber too (Diputados) with a vote 192 for and 2 against. 163 # By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to 164 # the original scanned proposal, where the dates and the zero hours are 165 # clear and unambiguous...This is the article about final approval: 166 # http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996 167 # 168 # From Paul Eggert (2007-12-22): 169 # For dates after mid-2008, the following rules are my guesses and 170 # are quite possibly wrong, but are more likely than no DST at all. 171 172 # From Alexander Krivenyshev (2008-09-05): 173 # As per message from Carlos Alberto Fonseca Arauz (Nicaragua), 174 # Argentina will start DST on Sunday October 19, 2008. 175 # 176 # http://www.worldtimezone.com/dst_news/dst_news_argentina03.html 177 # http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish) 178 179 # From Juan Manuel Docile in https://bugs.gentoo.org/240339 (2008-10-07) 180 # via Rodrigo Severo: 181 # Argentinian law No. 25.155 is no longer valid. 182 # http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm 183 # The new one is law No. 26.350 184 # http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm 185 # So there is no summer time in Argentina for now. 186 187 # From Mariano Absatz (2008-10-20): 188 # Decree 1693/2008 applies Law 26.350 for the summer 2008/2009 establishing DST 189 # in Argentina from 2008-10-19 until 2009-03-15. 190 # http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01 191 # 192 193 # Decree 1705/2008 excepting 12 Provinces from applying DST in the summer 194 # 2008/2009: Catamarca, La Rioja, Mendoza, Salta, San Juan, San Luis, La 195 # Pampa, Neuquén, Rio Negro, Chubut, Santa Cruz and Tierra del Fuego 196 # http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01 197 # 198 # Press release 235 dated Saturday October 18th, from the Government of the 199 # Province of Jujuy saying it will not apply DST either (even when it was not 200 # included in Decree 1705/2008). 201 # http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc 202 203 # From fullinet (2009-10-18): 204 # As announced in 205 # http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356 206 # (an official .gob.ar) under title: "Sin Cambio de Hora" 207 # (English: "No hour change"). 208 # 209 # "Por el momento, el Gobierno Nacional resolvió no modificar la hora 210 # oficial, decisión que estaba en estudio para su implementación el 211 # domingo 18 de octubre. Desde el Ministerio de Planificación se anunció 212 # que la Argentina hoy, en estas condiciones meteorológicas, no necesita 213 # la modificación del huso horario, ya que 2009 nos encuentra con 214 # crecimiento en la producción y distribución energética." 215 216 Rule Arg 2007 only - Dec 30 0:00 1:00 S 217 Rule Arg 2008 2009 - Mar Sun>=15 0:00 0 - 218 Rule Arg 2008 only - Oct Sun>=15 0:00 1:00 S 219 220 # From Mariano Absatz (2004-05-21): 221 # Today it was officially published that the Province of Mendoza is changing 222 # its timezone this winter... starting tomorrow night.... 223 # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf 224 # From Paul Eggert (2004-05-24): 225 # It's Law No. 7,210. This change is due to a public power emergency, so for 226 # now we'll assume it's for this year only. 227 # 228 # From Paul Eggert (2014-08-09): 229 # Hora de verano para la República Argentina 230 # http://buenasiembra.com.ar/esoterismo/astrologia/hora-de-verano-de-la-republica-argentina-27.html 231 # says that standard time in Argentina from 1894-10-31 232 # to 1920-05-01 was -4:16:48.25. Go with this more-precise value 233 # over Shanks & Pottenger. 234 # 235 # From Mariano Absatz (2004-06-05): 236 # These media articles from a major newspaper mostly cover the current state: 237 # http://www.lanacion.com.ar/04/05/27/de_604825.asp 238 # http://www.lanacion.com.ar/04/05/28/de_605203.asp 239 # 240 # The following eight (8) provinces pulled clocks back to UTC-04:00 at 241 # midnight Monday May 31st. (that is, the night between 05/31 and 06/01). 242 # Apparently, all nine provinces would go back to UTC-03:00 at the same 243 # time in October 17th. 244 # 245 # Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz, 246 # Tierra del Fuego, Tucumán. 247 # 248 # From Mariano Absatz (2004-06-14): 249 # ... this weekend, the Province of Tucumán decided it'd go back to UTC-03:00 250 # yesterday midnight (that is, at 24:00 Saturday 12th), since the people's 251 # annoyance with the change is much higher than the power savings obtained.... 252 # 253 # From Gwillim Law (2004-06-14): 254 # http://www.lanacion.com.ar/04/06/10/de_609078.asp ... 255 # "The time change in Tierra del Fuego was a conflicted decision from 256 # the start. The government had decreed that the measure would take 257 # effect on June 1, but a normative error forced the new time to begin 258 # three days earlier, from a Saturday to a Sunday.... 259 # Our understanding was that the change was originally scheduled to take place 260 # on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other 261 # provinces). Sunday was May 30, only two days earlier. So the article 262 # contains a contradiction. I would give more credence to the Saturday/Sunday 263 # date than the "three days earlier" phrase, and conclude that Tierra del 264 # Fuego set its clocks back at 2004-05-30 00:00. 265 # 266 # From Steffen Thorsen (2004-10-05): 267 # The previous law 7210 which changed the province of Mendoza's time zone 268 # back in May have been modified slightly in a new law 7277, which set the 269 # new end date to 2004-09-26 (original date was 2004-10-17). 270 # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf 271 # 272 # From Mariano Absatz (2004-10-05): 273 # San Juan changed from UTC-03:00 to UTC-04:00 at midnight between 274 # Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00 275 # at midnight between Saturday, July 24th and Sunday, July 25th.... 276 # http://www.sanjuan.gov.ar/prensa/archivo/000329.html 277 # http://www.sanjuan.gov.ar/prensa/archivo/000426.html 278 # http://www.sanjuan.gov.ar/prensa/archivo/000441.html 279 280 # From Alex Krivenyshev (2008-01-17): 281 # Here are articles that Argentina Province San Luis is planning to end DST 282 # as earlier as upcoming Monday January 21, 2008 or February 2008: 283 # 284 # Provincia argentina retrasa reloj y marca diferencia con resto del país 285 # (Argentine Province delayed clock and mark difference with the rest of the 286 # country) 287 # http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel 288 # 289 # Es inminente que en San Luis atrasen una hora los relojes 290 # (It is imminent in San Luis clocks one hour delay) 291 # https://www.lagaceta.com.ar/nota/253414/Economia/Es-inminente-que-en-San-Luis-atrasen-una-hora-los-relojes.html 292 # http://www.worldtimezone.com/dst_news/dst_news_argentina02.html 293 294 # From Jesper Nørgaard Welen (2008-01-18): 295 # The page of the San Luis provincial government 296 # http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812 297 # confirms what Alex Krivenyshev has earlier sent to the tz 298 # emailing list about that San Luis plans to return to standard 299 # time much earlier than the rest of the country. It also 300 # confirms that upon request the provinces San Juan and Mendoza 301 # refused to follow San Luis in this change. 302 # 303 # The change is supposed to take place Monday the 21st at 0:00 304 # hours. As far as I understand it if this goes ahead, we need 305 # a new timezone for San Luis (although there are also documented 306 # independent changes in the southamerica file of San Luis in 307 # 1990 and 1991 which has not been confirmed). 308 309 # From Jesper Nørgaard Welen (2008-01-25): 310 # Unfortunately the below page has become defunct, about the San Luis 311 # time change. Perhaps because it now is part of a group of pages "Most 312 # important pages of 2008." 313 # 314 # You can use 315 # http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834 316 # instead it seems. Or use "Buscador" from the main page of the San Luis 317 # government, and fill in "huso" and click OK, and you will get 3 pages 318 # from which the first one is identical to the above. 319 320 # From Mariano Absatz (2008-01-28): 321 # I can confirm that the Province of San Luis (and so far only that 322 # province) decided to go back to UTC-3 effective midnight Jan 20th 2008 323 # (that is, Monday 21st at 0:00 is the time the clocks were delayed back 324 # 1 hour), and they intend to keep UTC-3 as their timezone all year round 325 # (that is, unless they change their mind any minute now). 326 # 327 # So we'll have to add yet another city to 'southamerica' (I think San 328 # Luis city is the mos populated city in the Province, so it'd be 329 # America/Argentina/San_Luis... of course I can't remember if San Luis's 330 # history of particular changes goes along with Mendoza or San Juan :-( 331 # (I only remember not being able to collect hard facts about San Luis 332 # back in 2004, when these provinces changed to UTC-4 for a few days, I 333 # mailed them personally and never got an answer). 334 335 # From Paul Eggert (2014-08-12): 336 # Unless otherwise specified, data entries are from Shanks & Pottenger through 337 # 1992, from the IATA otherwise. As noted below, Shanks & Pottenger say that 338 # America/Cordoba split into 6 subregions during 1991/1992, one of which 339 # was America/San_Luis, but we haven't verified this yet so for now we'll 340 # keep America/Cordoba a single region rather than splitting it into the 341 # other 5 subregions. 342 343 # From Mariano Absatz (2009-03-13): 344 # Yesterday (with our usual 2-day notice) the Province of San Luis 345 # decided that next Sunday instead of "staying" @utc-03:00 they will go 346 # to utc-04:00 until the second Saturday in October... 347 # 348 # The press release is at 349 # http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102 350 # (I couldn't find the decree, but www.sanluis.gov.ar 351 # is the official page for the Province Government.) 352 # 353 # There's also a note in only one of the major national papers ... 354 # http://www.lanacion.com.ar/nota.asp?nota_id=1107912 355 # 356 # The press release says [quick and dirty translation]: 357 # ... announced that next Sunday, at 00:00, Puntanos (the San Luis 358 # inhabitants) will have to turn back one hour their clocks 359 # 360 # Since then, San Luis will establish its own Province timezone. Thus, 361 # during 2009, this timezone change will run from 00:00 the third Sunday 362 # in March until 24:00 of the second Saturday in October. 363 364 # From Mariano Absatz (2009-10-16): 365 # ...the Province of San Luis is a case in itself. 366 # 367 # The Law at 368 # http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276 369 # is ambiguous because establishes a calendar from the 2nd Sunday in 370 # October at 0:00 thru the 2nd Saturday in March at 24:00 and the 371 # complement of that starting on the 2nd Sunday of March at 0:00 and 372 # ending on the 2nd Saturday of March at 24:00. 373 # 374 # This clearly breaks every time the 1st of March or October is a Sunday. 375 # 376 # IMHO, the "spirit of the Law" is to make the changes at 0:00 on the 2nd 377 # Sunday of October and March. 378 # 379 # The problem is that the changes in the rest of the Provinces that did 380 # change in 2007/2008, were made according to the Federal Law and Decrees 381 # that did so on the 3rd Sunday of October and March. 382 # 383 # In fact, San Luis actually switched from UTC-4 to UTC-3 last Sunday 384 # (October 11th) at 0:00. 385 # 386 # So I guess a new set of rules, besides "Arg", must be made and the last 387 # America/Argentina/San_Luis entries should change to use these... 388 # ... 389 390 # From Alexander Krivenyshev (2010-04-09): 391 # According to news reports from El Diario de la República Province San 392 # Luis, Argentina (standard time UTC-04) will keep Daylight Saving Time 393 # after April 11, 2010 - will continue to have same time as rest of 394 # Argentina (UTC-3) (no DST). 395 # 396 # Confirmaron la prórroga del huso horario de verano (Spanish) 397 # http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9 398 # or (some English translation): 399 # http://www.worldtimezone.com/dst_news/dst_news_argentina08.html 400 401 # From Mariano Absatz (2010-04-12): 402 # yes...I can confirm this...and given that San Luis keeps calling 403 # UTC-03:00 "summer time", we should't just let San Luis go back to "Arg" 404 # rules...San Luis is still using "Western ARgentina Time" and it got 405 # stuck on Summer daylight savings time even though the summer is over. 406 407 # From Paul Eggert (2013-09-05): 408 # Perhaps San Luis operates on the legal fiction that it is at -04 409 # with perpetual summer time, but ordinary usage typically seems to 410 # just say it's at -03; see, for example, 411 # https://es.wikipedia.org/wiki/Hora_oficial_argentina 412 # We've documented similar situations as being plain changes to 413 # standard time, so let's do that here too. This does not change UTC 414 # offsets, only tm_isdst and the time zone abbreviations. One minor 415 # plus is that this silences a zic complaint that there's no POSIX TZ 416 # setting for time stamps past 2038. 417 418 # From Paul Eggert (2013-02-21): 419 # Milne says Córdoba time was -4:16:48.2. Round to the nearest second. 420 421 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 422 # 423 # Buenos Aires (BA), Capital Federal (CF), 424 Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31 425 -4:16:48 - CMT 1920 May # Córdoba Mean Time 426 -4:00 - -04 1930 Dec 427 -4:00 Arg -04/-03 1969 Oct 5 428 -3:00 Arg -03/-02 1999 Oct 3 429 -4:00 Arg -04/-03 2000 Mar 3 430 -3:00 Arg -03/-02 431 # 432 # Córdoba (CB), Santa Fe (SF), Entre Ríos (ER), Corrientes (CN), Misiones (MN), 433 # Chaco (CC), Formosa (FM), Santiago del Estero (SE) 434 # 435 # Shanks & Pottenger also make the following claims, which we haven't verified: 436 # - Formosa switched to -3:00 on 1991-01-07. 437 # - Misiones switched to -3:00 on 1990-12-29. 438 # - Chaco switched to -3:00 on 1991-01-04. 439 # - Santiago del Estero switched to -4:00 on 1991-04-01, 440 # then to -3:00 on 1991-04-26. 441 # 442 Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31 443 -4:16:48 - CMT 1920 May 444 -4:00 - -04 1930 Dec 445 -4:00 Arg -04/-03 1969 Oct 5 446 -3:00 Arg -03/-02 1991 Mar 3 447 -4:00 - -04 1991 Oct 20 448 -3:00 Arg -03/-02 1999 Oct 3 449 -4:00 Arg -04/-03 2000 Mar 3 450 -3:00 Arg -03/-02 451 # 452 # Salta (SA), La Pampa (LP), Neuquén (NQ), Rio Negro (RN) 453 Zone America/Argentina/Salta -4:21:40 - LMT 1894 Oct 31 454 -4:16:48 - CMT 1920 May 455 -4:00 - -04 1930 Dec 456 -4:00 Arg -04/-03 1969 Oct 5 457 -3:00 Arg -03/-02 1991 Mar 3 458 -4:00 - -04 1991 Oct 20 459 -3:00 Arg -03/-02 1999 Oct 3 460 -4:00 Arg -04/-03 2000 Mar 3 461 -3:00 Arg -03/-02 2008 Oct 18 462 -3:00 - -03 463 # 464 # Tucumán (TM) 465 Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31 466 -4:16:48 - CMT 1920 May 467 -4:00 - -04 1930 Dec 468 -4:00 Arg -04/-03 1969 Oct 5 469 -3:00 Arg -03/-02 1991 Mar 3 470 -4:00 - -04 1991 Oct 20 471 -3:00 Arg -03/-02 1999 Oct 3 472 -4:00 Arg -04/-03 2000 Mar 3 473 -3:00 - -03 2004 Jun 1 474 -4:00 - -04 2004 Jun 13 475 -3:00 Arg -03/-02 476 # 477 # La Rioja (LR) 478 Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31 479 -4:16:48 - CMT 1920 May 480 -4:00 - -04 1930 Dec 481 -4:00 Arg -04/-03 1969 Oct 5 482 -3:00 Arg -03/-02 1991 Mar 1 483 -4:00 - -04 1991 May 7 484 -3:00 Arg -03/-02 1999 Oct 3 485 -4:00 Arg -04/-03 2000 Mar 3 486 -3:00 - -03 2004 Jun 1 487 -4:00 - -04 2004 Jun 20 488 -3:00 Arg -03/-02 2008 Oct 18 489 -3:00 - -03 490 # 491 # San Juan (SJ) 492 Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31 493 -4:16:48 - CMT 1920 May 494 -4:00 - -04 1930 Dec 495 -4:00 Arg -04/-03 1969 Oct 5 496 -3:00 Arg -03/-02 1991 Mar 1 497 -4:00 - -04 1991 May 7 498 -3:00 Arg -03/-02 1999 Oct 3 499 -4:00 Arg -04/-03 2000 Mar 3 500 -3:00 - -03 2004 May 31 501 -4:00 - -04 2004 Jul 25 502 -3:00 Arg -03/-02 2008 Oct 18 503 -3:00 - -03 504 # 505 # Jujuy (JY) 506 Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31 507 -4:16:48 - CMT 1920 May 508 -4:00 - -04 1930 Dec 509 -4:00 Arg -04/-03 1969 Oct 5 510 -3:00 Arg -03/-02 1990 Mar 4 511 -4:00 - -04 1990 Oct 28 512 -4:00 1:00 -03 1991 Mar 17 513 -4:00 - -04 1991 Oct 6 514 -3:00 1:00 -02 1992 515 -3:00 Arg -03/-02 1999 Oct 3 516 -4:00 Arg -04/-03 2000 Mar 3 517 -3:00 Arg -03/-02 2008 Oct 18 518 -3:00 - -03 519 # 520 # Catamarca (CT), Chubut (CH) 521 Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31 522 -4:16:48 - CMT 1920 May 523 -4:00 - -04 1930 Dec 524 -4:00 Arg -04/-03 1969 Oct 5 525 -3:00 Arg -03/-02 1991 Mar 3 526 -4:00 - -04 1991 Oct 20 527 -3:00 Arg -03/-02 1999 Oct 3 528 -4:00 Arg -04/-03 2000 Mar 3 529 -3:00 - -03 2004 Jun 1 530 -4:00 - -04 2004 Jun 20 531 -3:00 Arg -03/-02 2008 Oct 18 532 -3:00 - -03 533 # 534 # Mendoza (MZ) 535 Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31 536 -4:16:48 - CMT 1920 May 537 -4:00 - -04 1930 Dec 538 -4:00 Arg -04/-03 1969 Oct 5 539 -3:00 Arg -03/-02 1990 Mar 4 540 -4:00 - -04 1990 Oct 15 541 -4:00 1:00 -03 1991 Mar 1 542 -4:00 - -04 1991 Oct 15 543 -4:00 1:00 -03 1992 Mar 1 544 -4:00 - -04 1992 Oct 18 545 -3:00 Arg -03/-02 1999 Oct 3 546 -4:00 Arg -04/-03 2000 Mar 3 547 -3:00 - -03 2004 May 23 548 -4:00 - -04 2004 Sep 26 549 -3:00 Arg -03/-02 2008 Oct 18 550 -3:00 - -03 551 # 552 # San Luis (SL) 553 554 Rule SanLuis 2008 2009 - Mar Sun>=8 0:00 0 - 555 Rule SanLuis 2007 2008 - Oct Sun>=8 0:00 1:00 S 556 557 Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31 558 -4:16:48 - CMT 1920 May 559 -4:00 - -04 1930 Dec 560 -4:00 Arg -04/-03 1969 Oct 5 561 -3:00 Arg -03/-02 1990 562 -3:00 1:00 -02 1990 Mar 14 563 -4:00 - -04 1990 Oct 15 564 -4:00 1:00 -03 1991 Mar 1 565 -4:00 - -04 1991 Jun 1 566 -3:00 - -03 1999 Oct 3 567 -4:00 1:00 -03 2000 Mar 3 568 -3:00 - -03 2004 May 31 569 -4:00 - -04 2004 Jul 25 570 -3:00 Arg -03/-02 2008 Jan 21 571 -4:00 SanLuis -04/-03 2009 Oct 11 572 -3:00 - -03 573 # 574 # Santa Cruz (SC) 575 Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31 576 -4:16:48 - CMT 1920 May 577 -4:00 - -04 1930 Dec 578 -4:00 Arg -04/-03 1969 Oct 5 579 -3:00 Arg -03/-02 1999 Oct 3 580 -4:00 Arg -04/-03 2000 Mar 3 581 -3:00 - -03 2004 Jun 1 582 -4:00 - -04 2004 Jun 20 583 -3:00 Arg -03/-02 2008 Oct 18 584 -3:00 - -03 585 # 586 # Tierra del Fuego, Antártida e Islas del Atlántico Sur (TF) 587 Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31 588 -4:16:48 - CMT 1920 May 589 -4:00 - -04 1930 Dec 590 -4:00 Arg -04/-03 1969 Oct 5 591 -3:00 Arg -03/-02 1999 Oct 3 592 -4:00 Arg -04/-03 2000 Mar 3 593 -3:00 - -03 2004 May 30 594 -4:00 - -04 2004 Jun 20 595 -3:00 Arg -03/-02 2008 Oct 18 596 -3:00 - -03 597 598 # Aruba 599 Link America/Curacao America/Aruba 600 601 # Bolivia 602 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 603 Zone America/La_Paz -4:32:36 - LMT 1890 604 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT 605 -4:32:36 1:00 BST 1932 Mar 21 # Bolivia ST 606 -4:00 - -04 607 608 # Brazil 609 610 # From Paul Eggert (1993-11-18): 611 # The mayor of Rio recently attempted to change the time zone rules 612 # just in his city, in order to leave more summer time for the tourist trade. 613 # The rule change lasted only part of the day; 614 # the federal government refused to follow the city's rules, and business 615 # was in a chaos, so the mayor backed down that afternoon. 616 617 # From IATA SSIM (1996-02): 618 # _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS), 619 # Santa Catarina (SC), Paraná (PR), São Paulo (SP), Rio de Janeiro (RJ), 620 # Espírito Santo (ES), Minas Gerais (MG), Bahia (BA), Goiás (GO), 621 # Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL]. 622 # [The last three states are new to this issue of the IATA SSIM.] 623 624 # From Gwillim Law (1996-10-07): 625 # Geography, history (Tocantins was part of Goiás until 1989), and other 626 # sources of time zone information lead me to believe that AL, SE, and TO were 627 # always in BR1, and so the only change was whether or not they observed DST.... 628 # The earliest issue of the SSIM I have is 2/91. Each issue from then until 629 # 9/95 says that DST is observed only in the ten states I quoted from 9/95, 630 # along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2 631 # (UTC-4).... The other two time zones given for Brazil are BR3, which is 632 # UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is 633 # UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's 634 # become part of the state of Pernambuco). The boundary between BR1 and BR2 635 # has never been clearly stated. They've simply been called East and West. 636 # However, some conclusions can be drawn from another IATA manual: the Airline 637 # Coding Directory, which lists close to 400 airports in Brazil. For each 638 # airport it gives a time zone which is coded to the SSIM. From that 639 # information, I'm led to conclude that the states of Amapá (AP), Ceará (CE), 640 # Maranhão (MA), Paraíba (PR), Pernambuco (PE), Piauí (PI), and Rio Grande do 641 # Norte (RN), and the eastern part of Pará (PA) are all in BR1 without DST. 642 643 # From Marcos Tadeu (1998-09-27): 644 # Brazilian official page <http://pcdsh01.on.br/verao1.html> 645 646 # From Jesper Nørgaard (2000-11-03): 647 # [For an official list of which regions in Brazil use which time zones, see:] 648 # http://pcdsh01.on.br/Fusbr.htm 649 # http://pcdsh01.on.br/Fusbrhv.htm 650 651 # From Celso Doria via David Madeo (2002-10-09): 652 # The reason for the delay this year has to do with elections in Brazil. 653 # 654 # Unlike in the United States, elections in Brazil are 100% computerized and 655 # the results are known almost immediately. Yesterday, it was the first 656 # round of the elections when 115 million Brazilians voted for President, 657 # Governor, Senators, Federal Deputies, and State Deputies. Nobody is 658 # counting (or re-counting) votes anymore and we know there will be a second 659 # round for the Presidency and also for some Governors. The 2nd round will 660 # take place on October 27th. 661 # 662 # The reason why the DST will only begin November 3rd is that the thousands 663 # of electoral machines used cannot have their time changed, and since the 664 # Constitution says the elections must begin at 8:00 AM and end at 5:00 PM, 665 # the Government decided to postpone DST, instead of changing the Constitution 666 # (maybe, for the next elections, it will be possible to change the clock)... 667 668 # From Rodrigo Severo (2004-10-04): 669 # It's just the biannual change made necessary by the much hyped, supposedly 670 # modern Brazilian eletronic voting machines which, apparently, can't deal 671 # with a time change between the first and the second rounds of the elections. 672 673 # From Steffen Thorsen (2007-09-20): 674 # Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00: 675 # http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975 676 677 # From Paul Schulze (2008-06-24): 678 # ...by law number 11.662 of April 24, 2008 (published in the "Diario 679 # Oficial da União"...) in Brazil there are changes in the timezones, 680 # effective today (00:00am at June 24, 2008) as follows: 681 # 682 # a) The timezone UTC+5 is extinguished, with all the Acre state and the 683 # part of the Amazonas state that had this timezone now being put to the 684 # timezone UTC+4 685 # b) The whole Pará state now is put at timezone UTC+3, instead of just 686 # part of it, as was before. 687 # 688 # This change follows a proposal of senator Tiao Viana of Acre state, that 689 # proposed it due to concerns about open television channels displaying 690 # programs inappropriate to youths in the states that had the timezone 691 # UTC+5 too early in the night. In the occasion, some more corrections 692 # were proposed, trying to unify the timezones of any given state. This 693 # change modifies timezone rules defined in decree 2.784 of 18 June, 694 # 1913. 695 696 # From Rodrigo Severo (2008-06-24): 697 # Just correcting the URL: 698 # https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008 699 # 700 # As a result of the above Decree I believe the America/Rio_Branco 701 # timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall 702 # be created to represent the...west side of the Pará State. I 703 # suggest this new timezone be called Santarem as the most 704 # important/populated city in the affected area. 705 # 706 # This new timezone would be the same as the Rio_Branco timezone up to 707 # the 2008/06/24 change which would be to UTC-3 instead of UTC-4. 708 709 # From Alex Krivenyshev (2008-06-24): 710 # This is a quick reference page for New and Old Brazil Time Zones map. 711 # http://www.worldtimezone.com/brazil-time-new-old.php 712 # 713 # - 4 time zones replaced by 3 time zones - eliminating time zone UTC-05 714 # (state Acre and the part of the Amazonas will be UTC/GMT-04) - western 715 # part of Par state is moving to one timezone UTC-03 (from UTC-04). 716 717 # From Paul Eggert (2002-10-10): 718 # The official decrees referenced below are mostly taken from 719 # Decretos sobre o Horário de Verão no Brasil. 720 # http://pcdsh01.on.br/DecHV.html 721 722 # From Steffen Thorsen (2008-08-29): 723 # As announced by the government and many newspapers in Brazil late 724 # yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and 725 # it will end on 2009-02-15 (current rule for Brazil is fine). Based on 726 # past years experience with the elections, there was a good chance that 727 # the start was postponed to November, but it did not happen this year. 728 # 729 # It has not yet been posted to http://pcdsh01.on.br/DecHV.html 730 # 731 # An official page about it: 732 # http://www.mme.gov.br/site/news/detail.do?newsId=16722 733 # Note that this link does not always work directly, but must be accessed 734 # by going to 735 # http://www.mme.gov.br/first 736 # 737 # One example link that works directly: 738 # http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54 739 # (Portuguese) 740 # 741 # We have a written a short article about it as well: 742 # https://www.timeanddate.com/news/time/brazil-dst-2008-2009.html 743 # 744 # From Alexander Krivenyshev (2011-10-04): 745 # State Bahia will return to Daylight savings time this year after 8 years off. 746 # The announcement was made by Governor Jaques Wagner in an interview to a 747 # television station in Salvador. 748 749 # In Portuguese: 750 # http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html 751 # https://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html 752 753 # From Guilherme Bernardes Rodrigues (2011-10-07): 754 # There is news in the media, however there is still no decree about it. 755 # I just send a e-mail to Zulmira Brandao at http://pcdsh01.on.br/ the 756 # official agency about time in Brazil, and she confirmed that the old rule is 757 # still in force. 758 759 # From Guilherme Bernardes Rodrigues (2011-10-14) 760 # It's official, the President signed a decree that includes Bahia in summer 761 # time. 762 # [ and in a second message (same day): ] 763 # I found the decree. 764 # 765 # DECRETO No. 7.584, DE 13 DE OUTUBRO DE 2011 766 # Link : 767 # http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6 768 769 # From Kelley Cook (2012-10-16): 770 # The governor of state of Bahia in Brazil announced on Thursday that 771 # due to public pressure, he is reversing the DST policy they implemented 772 # last year and will not be going to Summer Time on October 21st.... 773 # http://www.correio24horas.com.br/r/artigo/apos-pressoes-wagner-suspende-horario-de-verao-na-bahia 774 775 # From Rodrigo Severo (2012-10-16): 776 # Tocantins state will have DST. 777 # https://noticias.terra.com.br/brasil/noticias/0,,OI6232536-EI306.html 778 779 # From Steffen Thorsen (2013-09-20): 780 # Tocantins in Brazil is very likely not to observe DST from October.... 781 # http://conexaoto.com.br/2013/09/18/ministerio-confirma-que-tocantins-esta-fora-do-horario-de-verao-em-2013-mas-falta-publicacao-de-decreto 782 # We will keep this article updated when this is confirmed: 783 # https://www.timeanddate.com/news/time/brazil-starts-dst-2013.html 784 785 # From Steffen Thorsen (2013-10-17): 786 # https://www.timeanddate.com/news/time/acre-amazonas-change-time-zone.html 787 # Senator Jorge Viana announced that Acre will change time zone on November 10. 788 # He did not specify the time of the change, nor if western parts of Amazonas 789 # will change as well. 790 # 791 # From Paul Eggert (2013-10-17): 792 # For now, assume western Amazonas will change as well. 793 794 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 795 # Decree 20,466 <http://pcdsh01.on.br/HV20466.htm> (1931-10-01) 796 # Decree 21,896 <http://pcdsh01.on.br/HV21896.htm> (1932-01-10) 797 Rule Brazil 1931 only - Oct 3 11:00 1:00 S 798 Rule Brazil 1932 1933 - Apr 1 0:00 0 - 799 Rule Brazil 1932 only - Oct 3 0:00 1:00 S 800 # Decree 23,195 <http://pcdsh01.on.br/HV23195.htm> (1933-10-10) 801 # revoked DST. 802 # Decree 27,496 <http://pcdsh01.on.br/HV27496.htm> (1949-11-24) 803 # Decree 27,998 <http://pcdsh01.on.br/HV27998.htm> (1950-04-13) 804 Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S 805 Rule Brazil 1950 only - Apr 16 1:00 0 - 806 Rule Brazil 1951 1952 - Apr 1 0:00 0 - 807 # Decree 32,308 <http://pcdsh01.on.br/HV32308.htm> (1953-02-24) 808 Rule Brazil 1953 only - Mar 1 0:00 0 - 809 # Decree 34,724 <http://pcdsh01.on.br/HV34724.htm> (1953-11-30) 810 # revoked DST. 811 # Decree 52,700 <http://pcdsh01.on.br/HV52700.htm> (1963-10-18) 812 # established DST from 1963-10-23 00:00 to 1964-02-29 00:00 813 # in SP, RJ, GB, MG, ES, due to the prolongation of the drought. 814 # Decree 53,071 <http://pcdsh01.on.br/HV53071.htm> (1963-12-03) 815 # extended the above decree to all of the national territory on 12-09. 816 Rule Brazil 1963 only - Dec 9 0:00 1:00 S 817 # Decree 53,604 <http://pcdsh01.on.br/HV53604.htm> (1964-02-25) 818 # extended summer time by one day to 1964-03-01 00:00 (start of school). 819 Rule Brazil 1964 only - Mar 1 0:00 0 - 820 # Decree 55,639 <http://pcdsh01.on.br/HV55639.htm> (1965-01-27) 821 Rule Brazil 1965 only - Jan 31 0:00 1:00 S 822 Rule Brazil 1965 only - Mar 31 0:00 0 - 823 # Decree 57,303 <http://pcdsh01.on.br/HV57303.htm> (1965-11-22) 824 Rule Brazil 1965 only - Dec 1 0:00 1:00 S 825 # Decree 57,843 <http://pcdsh01.on.br/HV57843.htm> (1966-02-18) 826 Rule Brazil 1966 1968 - Mar 1 0:00 0 - 827 Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S 828 # Decree 63,429 <http://pcdsh01.on.br/HV63429.htm> (1968-10-15) 829 # revoked DST. 830 # Decree 91,698 <http://pcdsh01.on.br/HV91698.htm> (1985-09-27) 831 Rule Brazil 1985 only - Nov 2 0:00 1:00 S 832 # Decree 92,310 (1986-01-21) 833 # Decree 92,463 (1986-03-13) 834 Rule Brazil 1986 only - Mar 15 0:00 0 - 835 # Decree 93,316 (1986-10-01) 836 Rule Brazil 1986 only - Oct 25 0:00 1:00 S 837 Rule Brazil 1987 only - Feb 14 0:00 0 - 838 # Decree 94,922 <http://pcdsh01.on.br/HV94922.htm> (1987-09-22) 839 Rule Brazil 1987 only - Oct 25 0:00 1:00 S 840 Rule Brazil 1988 only - Feb 7 0:00 0 - 841 # Decree 96,676 <http://pcdsh01.on.br/HV96676.htm> (1988-09-12) 842 # except for the states of AC, AM, PA, RR, RO, and AP (then a territory) 843 Rule Brazil 1988 only - Oct 16 0:00 1:00 S 844 Rule Brazil 1989 only - Jan 29 0:00 0 - 845 # Decree 98,077 <http://pcdsh01.on.br/HV98077.htm> (1989-08-21) 846 # with the same exceptions 847 Rule Brazil 1989 only - Oct 15 0:00 1:00 S 848 Rule Brazil 1990 only - Feb 11 0:00 0 - 849 # Decree 99,530 <http://pcdsh01.on.br/HV99530.htm> (1990-09-17) 850 # adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF. 851 # Decree 99,629 (1990-10-19) adds BA, MT. 852 Rule Brazil 1990 only - Oct 21 0:00 1:00 S 853 Rule Brazil 1991 only - Feb 17 0:00 0 - 854 # Unnumbered decree <http://pcdsh01.on.br/HV1991.htm> (1991-09-25) 855 # adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF. 856 Rule Brazil 1991 only - Oct 20 0:00 1:00 S 857 Rule Brazil 1992 only - Feb 9 0:00 0 - 858 # Unnumbered decree <http://pcdsh01.on.br/HV1992.htm> (1992-10-16) 859 # adopted by same states. 860 Rule Brazil 1992 only - Oct 25 0:00 1:00 S 861 Rule Brazil 1993 only - Jan 31 0:00 0 - 862 # Decree 942 <http://pcdsh01.on.br/HV942.htm> (1993-09-28) 863 # adopted by same states, plus AM. 864 # Decree 1,252 <http://pcdsh01.on.br/HV1252.htm> (1994-09-22; 865 # web page corrected 2004-01-07) adopted by same states, minus AM. 866 # Decree 1,636 <http://pcdsh01.on.br/HV1636.htm> (1995-09-14) 867 # adopted by same states, plus MT and TO. 868 # Decree 1,674 <http://pcdsh01.on.br/HV1674.htm> (1995-10-13) 869 # adds AL, SE. 870 Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S 871 Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 - 872 Rule Brazil 1996 only - Feb 11 0:00 0 - 873 # Decree 2,000 <http://pcdsh01.on.br/HV2000.htm> (1996-09-04) 874 # adopted by same states, minus AL, SE. 875 Rule Brazil 1996 only - Oct 6 0:00 1:00 S 876 Rule Brazil 1997 only - Feb 16 0:00 0 - 877 # From Daniel C. Sobral (1998-02-12): 878 # In 1997, the DS began on October 6. The stated reason was that 879 # because international television networks ignored Brazil's policy on DS, 880 # they bought the wrong times on satellite for coverage of Pope's visit. 881 # This year, the ending date of DS was postponed to March 1 882 # to help dealing with the shortages of electric power. 883 # 884 # Decree 2,317 (1997-09-04), adopted by same states. 885 Rule Brazil 1997 only - Oct 6 0:00 1:00 S 886 # Decree 2,495 <http://pcdsh01.on.br/figuras/HV2495.JPG> 887 # (1998-02-10) 888 Rule Brazil 1998 only - Mar 1 0:00 0 - 889 # Decree 2,780 <http://pcdsh01.on.br/figuras/Hv98.jpg> (1998-09-11) 890 # adopted by the same states as before. 891 Rule Brazil 1998 only - Oct 11 0:00 1:00 S 892 Rule Brazil 1999 only - Feb 21 0:00 0 - 893 # Decree 3,150 <http://pcdsh01.on.br/figuras/HV3150.gif> 894 # (1999-08-23) adopted by same states. 895 # Decree 3,188 <http://pcdsh01.on.br/DecHV99.gif> (1999-09-30) 896 # adds SE, AL, PB, PE, RN, CE, PI, MA and RR. 897 Rule Brazil 1999 only - Oct 3 0:00 1:00 S 898 Rule Brazil 2000 only - Feb 27 0:00 0 - 899 # Decree 3,592 <http://pcdsh01.on.br/DEC3592.htm> (2000-09-06) 900 # adopted by the same states as before. 901 # Decree 3,630 <http://pcdsh01.on.br/Dec3630.jpg> (2000-10-13) 902 # repeals DST in PE and RR, effective 2000-10-15 00:00. 903 # Decree 3,632 <http://pcdsh01.on.br/Dec3632.jpg> (2000-10-17) 904 # repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00. 905 # Decree 3,916 <http://pcdsh01.on.br/figuras/HV3916.gif> 906 # (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE. 907 Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S 908 Rule Brazil 2001 2006 - Feb Sun>=15 0:00 0 - 909 # Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE. 910 # 4,399 <http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm> 911 Rule Brazil 2002 only - Nov 3 0:00 1:00 S 912 # Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO. 913 # 4,844 <http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm> 914 Rule Brazil 2003 only - Oct 19 0:00 1:00 S 915 # Decree 5,223 (2004-10-01) reestablishes DST in MT. 916 # 5,223 <http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm> 917 Rule Brazil 2004 only - Nov 2 0:00 1:00 S 918 # Decree 5,539 <http://pcdsh01.on.br/DecHV5539.gif> (2005-09-19), 919 # adopted by the same states as before. 920 Rule Brazil 2005 only - Oct 16 0:00 1:00 S 921 # Decree 5,920 <http://pcdsh01.on.br/DecHV5920.gif> (2006-10-03), 922 # adopted by the same states as before. 923 Rule Brazil 2006 only - Nov 5 0:00 1:00 S 924 Rule Brazil 2007 only - Feb 25 0:00 0 - 925 # Decree 6,212 <http://pcdsh01.on.br/DecHV6212.gif> (2007-09-26), 926 # adopted by the same states as before. 927 Rule Brazil 2007 only - Oct Sun>=8 0:00 1:00 S 928 # From Frederico A. C. Neves (2008-09-10): 929 # According to this decree 930 # http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm 931 # [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the 932 # 3rd Feb Sunday. There is an exception on the return date when this is 933 # the Carnival Sunday then the return date will be the next Sunday... 934 Rule Brazil 2008 2017 - Oct Sun>=15 0:00 1:00 S 935 Rule Brazil 2008 2011 - Feb Sun>=15 0:00 0 - 936 # Decree 7,584 <http://pcdsh01.on.br/HVdecreto7584_20111013.jpg> (2011-10-13) 937 # added Bahia. 938 Rule Brazil 2012 only - Feb Sun>=22 0:00 0 - 939 # Decree 7,826 <http://pcdsh01.on.br/HVdecreto7826_20121015.jpg> (2012-10-15) 940 # removed Bahia and added Tocantins. 941 # Decree 8,112 <http://pcdsh01.on.br/HVdecreto8112_20130930.JPG> (2013-09-30) 942 # removed Tocantins. 943 Rule Brazil 2013 2014 - Feb Sun>=15 0:00 0 - 944 Rule Brazil 2015 only - Feb Sun>=22 0:00 0 - 945 Rule Brazil 2016 2022 - Feb Sun>=15 0:00 0 - 946 # From Steffen Thorsen (2017-12-18): 947 # According to many media sources, next year's DST start in Brazil will move to 948 # the first Sunday of November, and it will stay like that for the years after. 949 # ... https://www.timeanddate.com/news/time/brazil-delays-dst-2018.html 950 # From Steffen Thorsen (2017-12-20): 951 # http://www.planalto.gov.br/ccivil_03/_ato2015-2018/2017/decreto/D9242.htm 952 Rule Brazil 2018 max - Nov Sun>=1 0:00 1:00 S 953 Rule Brazil 2023 only - Feb Sun>=22 0:00 0 - 954 Rule Brazil 2024 2025 - Feb Sun>=15 0:00 0 - 955 Rule Brazil 2026 only - Feb Sun>=22 0:00 0 - 956 Rule Brazil 2027 2033 - Feb Sun>=15 0:00 0 - 957 Rule Brazil 2034 only - Feb Sun>=22 0:00 0 - 958 Rule Brazil 2035 2036 - Feb Sun>=15 0:00 0 - 959 Rule Brazil 2037 only - Feb Sun>=22 0:00 0 - 960 # From Arthur David Olson (2008-09-29): 961 # The next is wrong in some years but is better than nothing. 962 Rule Brazil 2038 max - Feb Sun>=15 0:00 0 - 963 964 # The latest ruleset listed above says that the following states observe DST: 965 # DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP. 966 967 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 968 # 969 # Fernando de Noronha (administratively part of PE) 970 Zone America/Noronha -2:09:40 - LMT 1914 971 -2:00 Brazil -02/-01 1990 Sep 17 972 -2:00 - -02 1999 Sep 30 973 -2:00 Brazil -02/-01 2000 Oct 15 974 -2:00 - -02 2001 Sep 13 975 -2:00 Brazil -02/-01 2002 Oct 1 976 -2:00 - -02 977 # Other Atlantic islands have no permanent settlement. 978 # These include Trindade and Martim Vaz (administratively part of ES), 979 # Rocas Atoll (RN), and the St Peter and St Paul Archipelago (PE). 980 # Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01; 981 # it also included the Penedos. 982 # 983 # Amapá (AP), east Pará (PA) 984 # East Pará includes Belém, Marabá, Serra Norte, and São Félix do Xingu. 985 # The division between east and west Pará is the river Xingu. 986 # In the north a very small part from the river Javary (now Jari I guess, 987 # the border with Amapá) to the Amazon, then to the Xingu. 988 Zone America/Belem -3:13:56 - LMT 1914 989 -3:00 Brazil -03/-02 1988 Sep 12 990 -3:00 - -03 991 # 992 # west Pará (PA) 993 # West Pará includes Altamira, Óbidos, Prainha, Oriximiná, and Santarém. 994 Zone America/Santarem -3:38:48 - LMT 1914 995 -4:00 Brazil -04/-03 1988 Sep 12 996 -4:00 - -04 2008 Jun 24 0:00 997 -3:00 - -03 998 # 999 # Maranhão (MA), Piauí (PI), Ceará (CE), Rio Grande do Norte (RN), 1000 # Paraíba (PB) 1001 Zone America/Fortaleza -2:34:00 - LMT 1914 1002 -3:00 Brazil -03/-02 1990 Sep 17 1003 -3:00 - -03 1999 Sep 30 1004 -3:00 Brazil -03/-02 2000 Oct 22 1005 -3:00 - -03 2001 Sep 13 1006 -3:00 Brazil -03/-02 2002 Oct 1 1007 -3:00 - -03 1008 # 1009 # Pernambuco (PE) (except Atlantic islands) 1010 Zone America/Recife -2:19:36 - LMT 1914 1011 -3:00 Brazil -03/-02 1990 Sep 17 1012 -3:00 - -03 1999 Sep 30 1013 -3:00 Brazil -03/-02 2000 Oct 15 1014 -3:00 - -03 2001 Sep 13 1015 -3:00 Brazil -03/-02 2002 Oct 1 1016 -3:00 - -03 1017 # 1018 # Tocantins (TO) 1019 Zone America/Araguaina -3:12:48 - LMT 1914 1020 -3:00 Brazil -03/-02 1990 Sep 17 1021 -3:00 - -03 1995 Sep 14 1022 -3:00 Brazil -03/-02 2003 Sep 24 1023 -3:00 - -03 2012 Oct 21 1024 -3:00 Brazil -03/-02 2013 Sep 1025 -3:00 - -03 1026 # 1027 # Alagoas (AL), Sergipe (SE) 1028 Zone America/Maceio -2:22:52 - LMT 1914 1029 -3:00 Brazil -03/-02 1990 Sep 17 1030 -3:00 - -03 1995 Oct 13 1031 -3:00 Brazil -03/-02 1996 Sep 4 1032 -3:00 - -03 1999 Sep 30 1033 -3:00 Brazil -03/-02 2000 Oct 22 1034 -3:00 - -03 2001 Sep 13 1035 -3:00 Brazil -03/-02 2002 Oct 1 1036 -3:00 - -03 1037 # 1038 # Bahia (BA) 1039 # There are too many Salvadors elsewhere, so use America/Bahia instead 1040 # of America/Salvador. 1041 Zone America/Bahia -2:34:04 - LMT 1914 1042 -3:00 Brazil -03/-02 2003 Sep 24 1043 -3:00 - -03 2011 Oct 16 1044 -3:00 Brazil -03/-02 2012 Oct 21 1045 -3:00 - -03 1046 # 1047 # Goiás (GO), Distrito Federal (DF), Minas Gerais (MG), 1048 # Espírito Santo (ES), Rio de Janeiro (RJ), São Paulo (SP), Paraná (PR), 1049 # Santa Catarina (SC), Rio Grande do Sul (RS) 1050 Zone America/Sao_Paulo -3:06:28 - LMT 1914 1051 -3:00 Brazil -03/-02 1963 Oct 23 0:00 1052 -3:00 1:00 -02 1964 1053 -3:00 Brazil -03/-02 1054 # 1055 # Mato Grosso do Sul (MS) 1056 Zone America/Campo_Grande -3:38:28 - LMT 1914 1057 -4:00 Brazil -04/-03 1058 # 1059 # Mato Grosso (MT) 1060 Zone America/Cuiaba -3:44:20 - LMT 1914 1061 -4:00 Brazil -04/-03 2003 Sep 24 1062 -4:00 - -04 2004 Oct 1 1063 -4:00 Brazil -04/-03 1064 # 1065 # Rondônia (RO) 1066 Zone America/Porto_Velho -4:15:36 - LMT 1914 1067 -4:00 Brazil -04/-03 1988 Sep 12 1068 -4:00 - -04 1069 # 1070 # Roraima (RR) 1071 Zone America/Boa_Vista -4:02:40 - LMT 1914 1072 -4:00 Brazil -04/-03 1988 Sep 12 1073 -4:00 - -04 1999 Sep 30 1074 -4:00 Brazil -04/-03 2000 Oct 15 1075 -4:00 - -04 1076 # 1077 # east Amazonas (AM): Boca do Acre, Jutaí, Manaus, Floriano Peixoto 1078 # The great circle line from Tabatinga to Porto Acre divides 1079 # east from west Amazonas. 1080 Zone America/Manaus -4:00:04 - LMT 1914 1081 -4:00 Brazil -04/-03 1988 Sep 12 1082 -4:00 - -04 1993 Sep 28 1083 -4:00 Brazil -04/-03 1994 Sep 22 1084 -4:00 - -04 1085 # 1086 # west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant, 1087 # Eirunepé, Envira, Ipixuna 1088 Zone America/Eirunepe -4:39:28 - LMT 1914 1089 -5:00 Brazil -05/-04 1988 Sep 12 1090 -5:00 - -05 1993 Sep 28 1091 -5:00 Brazil -05/-04 1994 Sep 22 1092 -5:00 - -05 2008 Jun 24 0:00 1093 -4:00 - -04 2013 Nov 10 1094 -5:00 - -05 1095 # 1096 # Acre (AC) 1097 Zone America/Rio_Branco -4:31:12 - LMT 1914 1098 -5:00 Brazil -05/-04 1988 Sep 12 1099 -5:00 - -05 2008 Jun 24 0:00 1100 -4:00 - -04 2013 Nov 10 1101 -5:00 - -05 1102 1103 # Chile 1104 1105 # From Paul Eggert (2015-04-03): 1106 # Shanks & Pottenger says America/Santiago introduced standard time in 1107 # 1890 and rounds its UT offset to 70W40; guess that in practice this 1108 # was the same offset as in 1916-1919. It also says Pacific/Easter 1109 # standardized on 109W22 in 1890; assume this didn't change the clocks. 1110 # 1111 # Dates for America/Santiago from 1910 to 2004 are primarily from 1112 # the following source, cited by Oscar van Vlijmen (2006-10-08): 1113 # [1] Chile Law 1114 # http://www.webexhibits.org/daylightsaving/chile.html 1115 # This contains a copy of this official table: 1116 # Cambios en la hora oficial de Chile desde 1900 (retrieved 2008-03-30) 1117 # https://web.archive.org/web/20080330200901/http://www.horaoficial.cl/cambio.htm 1118 # [1] needs several corrections, though. 1119 # 1120 # The first set of corrections is from: 1121 # [2] History of the Official Time of Chile 1122 # http://www.horaoficial.cl/ing/horaof_ing.html (retrieved 2012-03-06). See: 1123 # https://web.archive.org/web/20120306042032/http://www.horaoficial.cl/ing/horaof_ing.html 1124 # This is an English translation of: 1125 # Historia de la hora oficial de Chile (retrieved 2012-10-24). See: 1126 # https://web.archive.org/web/20121024234627/http://www.horaoficial.cl/horaof.htm 1127 # A fancier Spanish version (requiring mouse-clicking) is at: 1128 # http://www.horaoficial.cl/historia_hora.html 1129 # Conflicts between [1] and [2] were resolved as follows: 1130 # 1131 # - [1] says the 1910 transition was Jan 1, [2] says Jan 10 and cites 1132 # Boletín No. 1, Aviso No. 1 (1910). Go with [2]. 1133 # 1134 # - [1] says SMT was -4:42:45, [2] says Chile's official time from 1135 # 1916 to 1919 was -4:42:46.3, the meridian of Chile's National 1136 # Astronomical Observatory (OAN), then located in what is now 1137 # Quinta Normal in Santiago. Go with [2], rounding it to -4:42:46. 1138 # 1139 # - [1] says the 1918 transition was Sep 1, [2] says Sep 10 and cites 1140 # Boletín No. 22, Aviso No. 129/1918 (1918-08-23). Go with [2]. 1141 # 1142 # - [1] does not give times for transitions; assume they occur 1143 # at midnight mainland time, the current common practice. However, 1144 # go with [2]'s specification of 23:00 for the 1947-05-21 transition. 1145 # 1146 # Another correction to [1] is from Jesper Nørgaard Welen, who 1147 # wrote (2006-10-08), "I think that there are some obvious mistakes in 1148 # the suggested link from Oscar van Vlijmen,... for instance entry 66 1149 # says that GMT-4 ended 1990-09-12 while entry 67 only begins GMT-3 at 1150 # 1990-09-15 (they should have been 1990-09-15 and 1990-09-16 1151 # respectively), but anyhow it clears up some doubts too." 1152 # 1153 # Data for Pacific/Easter from 1910 through 1967 come from Shanks & 1154 # Pottenger. After that, for lack of better info assume 1155 # Pacific/Easter is always two hours behind America/Santiago; 1156 # this is known to work for DST transitions starting in 2008 and 1157 # may well be true for earlier transitions. 1158 1159 # From Eduardo Krell (1995-10-19): 1160 # The law says to switch to DST at midnight [24:00] on the second SATURDAY 1161 # of October.... The law is the same for March and October. 1162 # (1998-09-29): 1163 # Because of the drought this year, the government decided to go into 1164 # DST earlier (saturday 9/26 at 24:00). This is a one-time change only ... 1165 # (unless there's another dry season next year, I guess). 1166 1167 # From Julio I. Pacheco Troncoso (1999-03-18): 1168 # Because of the same drought, the government decided to end DST later, 1169 # on April 3, (one-time change). 1170 1171 # From Germán Poo-Caamaño (2008-03-03): 1172 # Due to drought, Chile extends Daylight Time in three weeks. This 1173 # is one-time change (Saturday 3/29 at 24:00 for America/Santiago 1174 # and Saturday 3/29 at 22:00 for Pacific/Easter) 1175 # The Supreme Decree is located at 1176 # http://www.shoa.cl/servicios/supremo316.pdf 1177 # 1178 # From José Miguel Garrido (2008-03-05): 1179 # http://www.shoa.cl/noticias/2008/04hora/hora.htm 1180 1181 # From Angel Chiang (2010-03-04): 1182 # Subject: DST in Chile exceptionally extended to 3 April due to earthquake 1183 # http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098 1184 # 1185 # From Arthur David Olson (2010-03-06): 1186 # Angel Chiang's message confirmed by Julio Pacheco; Julio provided a patch. 1187 1188 # From Glenn Eychaner (2011-03-28): 1189 # http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E} 1190 # In English: 1191 # Chile's clocks will go back an hour this year on the 7th of May instead 1192 # of this Saturday. They will go forward again the 3rd Saturday in 1193 # August, not in October as they have since 1968. 1194 1195 # From Mauricio Parada (2012-02-22), translated by Glenn Eychaner (2012-02-23): 1196 # As stated in the website of the Chilean Energy Ministry 1197 # http://www.minenergia.cl/ministerio/noticias/generales/gobierno-anuncia-fechas-de-cambio-de.html 1198 # The Chilean Government has decided to postpone the entrance into winter time 1199 # (to leave DST) from March 11 2012 to April 28th 2012.... 1200 # Quote from the website communication: 1201 # 1202 # 6. For the year 2012, the dates of entry into winter time will be as follows: 1203 # a. Saturday April 28, 2012, clocks should go back 60 minutes; that is, at 1204 # 23:59:59, instead of passing to 0:00, the time should be adjusted to be 23:00 1205 # of the same day. 1206 # b. Saturday, September 1, 2012, clocks should go forward 60 minutes; that is, 1207 # at 23:59:59, instead of passing to 0:00, the time should be adjusted to be 1208 # 01:00 on September 2. 1209 1210 # From Steffen Thorsen (2013-02-15): 1211 # According to several news sources, Chile has extended DST this year, 1212 # they will end DST later and start DST earlier than planned. They 1213 # hope to save energy. The new end date is 2013-04-28 00:00 and new 1214 # start date is 2013-09-08 00:00.... 1215 # http://www.gob.cl/informa/2013/02/15/gobierno-anuncia-fechas-de-cambio-de-hora-para-el-ano-2013.htm 1216 1217 # From José Miguel Garrido (2014-02-19): 1218 # Today appeared in the Diario Oficial a decree amending the time change 1219 # dates to 2014. 1220 # DST End: last Saturday of April 2014 (Sun 27 Apr 2014 03:00 UTC) 1221 # DST Start: first Saturday of September 2014 (Sun 07 Sep 2014 04:00 UTC) 1222 # http://www.diariooficial.interior.gob.cl//media/2014/02/19/do-20140219.pdf 1223 1224 # From Eduardo Romero Urra (2015-03-03): 1225 # Today has been published officially that Chile will use the DST time 1226 # permanently until March 25 of 2017 1227 # http://www.diariooficial.interior.gob.cl/media/2015/03/03/1-large.jpg 1228 # 1229 # From Paul Eggert (2015-03-03): 1230 # For now, assume that the extension will persist indefinitely. 1231 1232 # From Juan Correa (2016-03-18): 1233 # The decree regarding DST has been published in today's Official Gazette: 1234 # http://www.diariooficial.interior.gob.cl/versiones-anteriores/do/20160318/ 1235 # http://www.leychile.cl/Navegar?idNorma=1088502 1236 # It does consider the second Saturday of May and August as the dates 1237 # for the transition; and it lists DST dates until 2019, but I think 1238 # this scheme will stick. 1239 # 1240 # From Paul Eggert (2016-03-18): 1241 # For now, assume the pattern holds for the indefinite future. 1242 # The decree says transitions occur at 24:00; in practice this appears 1243 # to mean 24:00 mainland time, not 24:00 local time, so that Easter 1244 # Island is always two hours behind the mainland. 1245 1246 # From Juan Correa (2016-12-04): 1247 # Magallanes region ... will keep DST (UTC -3) all year round.... 1248 # http://www.soychile.cl/Santiago/Sociedad/2016/12/04/433428/Bachelet-firmo-el-decreto-para-establecer-un-horario-unico-para-la-Region-de-Magallanes.aspx 1249 # 1250 # From Deborah Goldsmith (2017-01-19): 1251 # http://www.diariooficial.interior.gob.cl/publicaciones/2017/01/17/41660/01/1169626.pdf 1252 # From Paul Eggert (2017-01-19): 1253 # The above says the Magallanes change expires 2019-05-11 at 24:00, 1254 # so in theory, they will revert to -04/-03 after that, which means 1255 # they will switch from -03 to -04 one hour after Santiago does that day. 1256 # For now, assume that they will not revert. 1257 1258 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1259 Rule Chile 1927 1931 - Sep 1 0:00 1:00 S 1260 Rule Chile 1928 1932 - Apr 1 0:00 0 - 1261 Rule Chile 1968 only - Nov 3 4:00u 1:00 S 1262 Rule Chile 1969 only - Mar 30 3:00u 0 - 1263 Rule Chile 1969 only - Nov 23 4:00u 1:00 S 1264 Rule Chile 1970 only - Mar 29 3:00u 0 - 1265 Rule Chile 1971 only - Mar 14 3:00u 0 - 1266 Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S 1267 Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 - 1268 Rule Chile 1973 only - Sep 30 4:00u 1:00 S 1269 Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S 1270 Rule Chile 1987 only - Apr 12 3:00u 0 - 1271 Rule Chile 1988 1990 - Mar Sun>=9 3:00u 0 - 1272 Rule Chile 1988 1989 - Oct Sun>=9 4:00u 1:00 S 1273 Rule Chile 1990 only - Sep 16 4:00u 1:00 S 1274 Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 - 1275 Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S 1276 Rule Chile 1997 only - Mar 30 3:00u 0 - 1277 Rule Chile 1998 only - Mar Sun>=9 3:00u 0 - 1278 Rule Chile 1998 only - Sep 27 4:00u 1:00 S 1279 Rule Chile 1999 only - Apr 4 3:00u 0 - 1280 Rule Chile 1999 2010 - Oct Sun>=9 4:00u 1:00 S 1281 Rule Chile 2000 2007 - Mar Sun>=9 3:00u 0 - 1282 # N.B.: the end of March 29 in Chile is March 30 in Universal time, 1283 # which is used below in specifying the transition. 1284 Rule Chile 2008 only - Mar 30 3:00u 0 - 1285 Rule Chile 2009 only - Mar Sun>=9 3:00u 0 - 1286 Rule Chile 2010 only - Apr Sun>=1 3:00u 0 - 1287 Rule Chile 2011 only - May Sun>=2 3:00u 0 - 1288 Rule Chile 2011 only - Aug Sun>=16 4:00u 1:00 S 1289 Rule Chile 2012 2014 - Apr Sun>=23 3:00u 0 - 1290 Rule Chile 2012 2014 - Sep Sun>=2 4:00u 1:00 S 1291 Rule Chile 2016 max - May Sun>=9 3:00u 0 - 1292 Rule Chile 2016 max - Aug Sun>=9 4:00u 1:00 S 1293 # IATA SSIM anomalies: (1992-02) says 1992-03-14; 1294 # (1996-09) says 1998-03-08. Ignore these. 1295 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1296 Zone America/Santiago -4:42:46 - LMT 1890 1297 -4:42:46 - SMT 1910 Jan 10 # Santiago Mean Time 1298 -5:00 - -05 1916 Jul 1 1299 -4:42:46 - SMT 1918 Sep 10 1300 -4:00 - -04 1919 Jul 1 1301 -4:42:46 - SMT 1927 Sep 1 1302 -5:00 Chile -05/-04 1932 Sep 1 1303 -4:00 - -04 1942 Jun 1 1304 -5:00 - -05 1942 Aug 1 1305 -4:00 - -04 1946 Jul 15 1306 -4:00 1:00 -03 1946 Sep 1 # central Chile 1307 -4:00 - -04 1947 Apr 1 1308 -5:00 - -05 1947 May 21 23:00 1309 -4:00 Chile -04/-03 1310 Zone America/Punta_Arenas -4:43:40 - LMT 1890 1311 -4:42:46 - SMT 1910 Jan 10 1312 -5:00 - -05 1916 Jul 1 1313 -4:42:46 - SMT 1918 Sep 10 1314 -4:00 - -04 1919 Jul 1 1315 -4:42:46 - SMT 1927 Sep 1 1316 -5:00 Chile -05/-04 1932 Sep 1 1317 -4:00 - -04 1942 Jun 1 1318 -5:00 - -05 1942 Aug 1 1319 -4:00 - -04 1947 Apr 1 1320 -5:00 - -05 1947 May 21 23:00 1321 -4:00 Chile -04/-03 2016 Dec 4 1322 -3:00 - -03 1323 Zone Pacific/Easter -7:17:28 - LMT 1890 1324 -7:17:28 - EMT 1932 Sep # Easter Mean Time 1325 -7:00 Chile -07/-06 1982 Mar 14 3:00u # Easter Time 1326 -6:00 Chile -06/-05 1327 # 1328 # Salas y Gómez Island is uninhabited. 1329 # Other Chilean locations, including Juan Fernández Is, Desventuradas Is, 1330 # and Antarctic bases, are like America/Santiago. 1331 1332 # Antarctic base using South American rules 1333 # (See the file 'antarctica' for more.) 1334 # 1335 # Palmer, Anvers Island, since 1965 (moved 2 miles in 1968) 1336 # 1337 # From Ethan Dicks (1996-10-06): 1338 # It keeps the same time as Punta Arenas, Chile, because, just like us 1339 # and the South Pole, that's the other end of their supply line.... 1340 # I verified with someone who was there that since 1980, 1341 # Palmer has followed Chile. Prior to that, before the Falklands War, 1342 # Palmer used to be supplied from Argentina. 1343 # 1344 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1345 Zone Antarctica/Palmer 0 - -00 1965 1346 -4:00 Arg -04/-03 1969 Oct 5 1347 -3:00 Arg -03/-02 1982 May 1348 -4:00 Chile -04/-03 2016 Dec 4 1349 -3:00 - -03 1350 1351 # Colombia 1352 1353 # Milne gives 4:56:16.4 for Bogotá time in 1899; round to nearest. He writes, 1354 # "A variation of fifteen minutes in the public clocks of Bogota is not rare." 1355 1356 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1357 Rule CO 1992 only - May 3 0:00 1:00 S 1358 Rule CO 1993 only - Apr 4 0:00 0 - 1359 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1360 Zone America/Bogota -4:56:16 - LMT 1884 Mar 13 1361 -4:56:16 - BMT 1914 Nov 23 # Bogotá Mean Time 1362 -5:00 CO -05/-04 1363 # Malpelo, Providencia, San Andres 1364 # no information; probably like America/Bogota 1365 1366 # Curaçao 1367 1368 # Milne gives 4:35:46.9 for Curaçao mean time; round to nearest. 1369 # 1370 # From Paul Eggert (2006-03-22): 1371 # Shanks & Pottenger say that The Bottom and Philipsburg have been at 1372 # -4:00 since standard time was introduced on 1912-03-02; and that 1373 # Kralendijk and Rincon used Kralendijk Mean Time (-4:33:08) from 1374 # 1912-02-02 to 1965-01-01. The former is dubious, since S&P also say 1375 # Saba Island has been like Curaçao. 1376 # This all predates our 1970 cutoff, though. 1377 # 1378 # By July 2007 Curaçao and St Maarten are planned to become 1379 # associated states within the Netherlands, much like Aruba; 1380 # Bonaire, Saba and St Eustatius would become directly part of the 1381 # Netherlands as Kingdom Islands. This won't affect their time zones 1382 # though, as far as we know. 1383 # 1384 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1385 Zone America/Curacao -4:35:47 - LMT 1912 Feb 12 # Willemstad 1386 -4:30 - -0430 1965 1387 -4:00 - AST 1388 1389 # From Arthur David Olson (2011-06-15): 1390 # use links for places with new iso3166 codes. 1391 # The name "Lower Prince's Quarter" is both longer than fourteen characters 1392 # and contains an apostrophe; use "Lower_Princes" below. 1393 1394 Link America/Curacao America/Lower_Princes # Sint Maarten 1395 Link America/Curacao America/Kralendijk # Caribbean Netherlands 1396 1397 # Ecuador 1398 # 1399 # Milne says the Central and South American Telegraph Company used -5:24:15. 1400 # 1401 # From Alois Treindl (2016-12-15): 1402 # https://www.elcomercio.com/actualidad/hora-sixto-1993.html 1403 # ... Whether the law applied also to Galápagos, I do not know. 1404 # From Paul Eggert (2016-12-15): 1405 # https://www.elcomercio.com/afull/modificacion-husohorario-ecuador-presidentes-decreto.html 1406 # This says President Sixto Durán Ballén signed decree No. 285, which 1407 # established DST from 1992-11-28 to 1993-02-05; it does not give transition 1408 # times. The people called it "hora de Sixto" ("Sixto hour"). The change did 1409 # not go over well; a popular song "Qué hora es" by Jaime Guevara had lyrics 1410 # that included "Amanecía en mitad de la noche, los guaguas iban a clase sin 1411 # sol" ("It was dawning in the middle of the night, the buses went to class 1412 # without sun"). Although Ballén's campaign slogan was "Ni un paso atrás" 1413 # (Not one step back), the clocks went back in 1993 and the experiment was not 1414 # repeated. For now, assume transitions were at 00:00 local time country-wide. 1415 # 1416 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1417 Rule Ecuador 1992 only - Nov 28 0:00 1:00 S 1418 Rule Ecuador 1993 only - Feb 5 0:00 0 - 1419 # 1420 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1421 Zone America/Guayaquil -5:19:20 - LMT 1890 1422 -5:14:00 - QMT 1931 # Quito Mean Time 1423 -5:00 Ecuador -05/-04 1424 Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno 1425 -5:00 - -05 1986 1426 -6:00 Ecuador -06/-05 1427 1428 # Falklands 1429 1430 # From Paul Eggert (2006-03-22): 1431 # Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except 1432 # the IATA gives 1996-09-08. Go with Shanks & Pottenger. 1433 1434 # From Falkland Islands Government Office, London (2001-01-22) 1435 # via Jesper Nørgaard: 1436 # ... the clocks revert back to Local Mean Time at 2 am on Sunday 15 1437 # April 2001 and advance one hour to summer time at 2 am on Sunday 2 1438 # September. It is anticipated that the clocks will revert back at 2 1439 # am on Sunday 21 April 2002 and advance to summer time at 2 am on 1440 # Sunday 1 September. 1441 1442 # From Rives McDow (2001-02-13): 1443 # 1444 # I have communicated several times with people there, and the last 1445 # time I had communications that was helpful was in 1998. Here is 1446 # what was said then: 1447 # 1448 # "The general rule was that Stanley used daylight saving and the Camp 1449 # did not. However for various reasons many people in the Camp have 1450 # started to use daylight saving (known locally as 'Stanley Time') 1451 # There is no rule as to who uses daylight saving - it is a matter of 1452 # personal choice and so it is impossible to draw a map showing who 1453 # uses it and who does not. Any list would be out of date as soon as 1454 # it was produced. This year daylight saving ended on April 18/19th 1455 # and started again on September 12/13th. I do not know what the rule 1456 # is, but can find out if you like. We do not change at the same time 1457 # as UK or Chile." 1458 # 1459 # I did have in my notes that the rule was "Second Saturday in Sep at 1460 # 0:00 until third Saturday in Apr at 0:00". I think that this does 1461 # not agree in some cases with Shanks; is this true? 1462 # 1463 # Also, there is no mention in the list that some areas in the 1464 # Falklands do not use DST. I have found in my communications there 1465 # that these areas are on the western half of East Falkland and all of 1466 # West Falkland. Stanley is the only place that consistently observes 1467 # DST. Again, as in other places in the world, the farmers don't like 1468 # it. West Falkland is almost entirely sheep farmers. 1469 # 1470 # I know one lady there that keeps a list of which farm keeps DST and 1471 # which doesn't each year. She runs a shop in Stanley, and says that 1472 # the list changes each year. She uses it to communicate to her 1473 # customers, catching them when they are home for lunch or dinner. 1474 1475 # From Paul Eggert (2001-03-05): 1476 # For now, we'll just record the time in Stanley, since we have no 1477 # better info. 1478 1479 # From Steffen Thorsen (2011-04-01): 1480 # The Falkland Islands will not turn back clocks this winter, but stay on 1481 # daylight saving time. 1482 # 1483 # One source: 1484 # http://www.falklandnews.com/public/story.cfm?get=5914&source=3 1485 # 1486 # We have gotten this confirmed by a clerk of the legislative assembly: 1487 # Normally the clocks revert to Local Mean Time (UTC/GMT -4 hours) on the 1488 # third Sunday of April at 0200hrs and advance to Summer Time (UTC/GMT -3 1489 # hours) on the first Sunday of September at 0200hrs. 1490 # 1491 # IMPORTANT NOTE: During 2011, on a trial basis, the Falkland Islands 1492 # will not revert to local mean time, but clocks will remain on Summer 1493 # time (UTC/GMT - 3 hours) throughout the whole of 2011. Any long term 1494 # change to local time following the trial period will be notified. 1495 # 1496 # From Andrew Newman (2012-02-24) 1497 # A letter from Justin McPhee, Chief Executive, 1498 # Cable & Wireless Falkland Islands (dated 2012-02-22) 1499 # states... 1500 # The current Atlantic/Stanley entry under South America expects the 1501 # clocks to go back to standard Falklands Time (FKT) on the 15th April. 1502 # The database entry states that in 2011 Stanley was staying on fixed 1503 # summer time on a trial basis only. FIG need to contact IANA and/or 1504 # the maintainers of the database to inform them we're adopting 1505 # the same policy this year and suggest recommendations for future years. 1506 # 1507 # For now we will assume permanent summer time for the Falklands 1508 # until advised differently (to apply for 2012 and beyond, after the 2011 1509 # experiment was apparently successful.) 1510 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1511 Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S 1512 Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 - 1513 Rule Falk 1939 only - Oct 1 0:00 1:00 S 1514 Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S 1515 Rule Falk 1943 only - Jan 1 0:00 0 - 1516 Rule Falk 1983 only - Sep lastSun 0:00 1:00 S 1517 Rule Falk 1984 1985 - Apr lastSun 0:00 0 - 1518 Rule Falk 1984 only - Sep 16 0:00 1:00 S 1519 Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S 1520 Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 - 1521 Rule Falk 2001 2010 - Apr Sun>=15 2:00 0 - 1522 Rule Falk 2001 2010 - Sep Sun>=1 2:00 1:00 S 1523 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1524 Zone Atlantic/Stanley -3:51:24 - LMT 1890 1525 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time 1526 -4:00 Falk -04/-03 1983 May 1527 -3:00 Falk -03/-02 1985 Sep 15 1528 -4:00 Falk -04/-03 2010 Sep 5 2:00 1529 -3:00 - -03 1530 1531 # French Guiana 1532 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1533 Zone America/Cayenne -3:29:20 - LMT 1911 Jul 1534 -4:00 - -04 1967 Oct 1535 -3:00 - -03 1536 1537 # Guyana 1538 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1539 Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown 1540 -3:45 - -0345 1975 Jul 31 1541 -3:00 - -03 1991 1542 # IATA SSIM (1996-06) says -4:00. Assume a 1991 switch. 1543 -4:00 - -04 1544 1545 # Paraguay 1546 # 1547 # From Paul Eggert (2006-03-22): 1548 # Shanks & Pottenger say that spring transitions are 01:00 -> 02:00, 1549 # and autumn transitions are 00:00 -> 23:00. Go with pre-1999 1550 # editions of Shanks, and with the IATA, who say transitions occur at 00:00. 1551 # 1552 # From Waldemar Villamayor-Venialbo (2013-09-20): 1553 # No time of the day is established for the adjustment, so people normally 1554 # adjust their clocks at 0 hour of the given dates. 1555 # 1556 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1557 Rule Para 1975 1988 - Oct 1 0:00 1:00 S 1558 Rule Para 1975 1978 - Mar 1 0:00 0 - 1559 Rule Para 1979 1991 - Apr 1 0:00 0 - 1560 Rule Para 1989 only - Oct 22 0:00 1:00 S 1561 Rule Para 1990 only - Oct 1 0:00 1:00 S 1562 Rule Para 1991 only - Oct 6 0:00 1:00 S 1563 Rule Para 1992 only - Mar 1 0:00 0 - 1564 Rule Para 1992 only - Oct 5 0:00 1:00 S 1565 Rule Para 1993 only - Mar 31 0:00 0 - 1566 Rule Para 1993 1995 - Oct 1 0:00 1:00 S 1567 Rule Para 1994 1995 - Feb lastSun 0:00 0 - 1568 Rule Para 1996 only - Mar 1 0:00 0 - 1569 # IATA SSIM (2000-02) says 1999-10-10; ignore this for now. 1570 # From Steffen Thorsen (2000-10-02): 1571 # I have three independent reports that Paraguay changed to DST this Sunday 1572 # (10-01). 1573 # 1574 # Translated by Gwillim Law (2001-02-27) from 1575 # Noticias, a daily paper in Asunción, Paraguay (2000-10-01): 1576 # http://www.diarionoticias.com.py/011000/nacional/naciona1.htm 1577 # Starting at 0:00 today, the clock will be set forward 60 minutes, in 1578 # fulfillment of Decree No. 7,273 of the Executive Power.... The time change 1579 # system has been operating for several years. Formerly there was a separate 1580 # decree each year; the new law has the same effect, but permanently. Every 1581 # year, the time will change on the first Sunday of October; likewise, the 1582 # clock will be set back on the first Sunday of March. 1583 # 1584 Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S 1585 # IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger. 1586 Rule Para 1997 only - Feb lastSun 0:00 0 - 1587 # Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but 1588 # (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27). 1589 Rule Para 1998 2001 - Mar Sun>=1 0:00 0 - 1590 # From Rives McDow (2002-02-28): 1591 # A decree was issued in Paraguay (No. 16350) on 2002-02-26 that changed the 1592 # dst method to be from the first Sunday in September to the first Sunday in 1593 # April. 1594 Rule Para 2002 2004 - Apr Sun>=1 0:00 0 - 1595 Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S 1596 # 1597 # From Jesper Nørgaard Welen (2005-01-02): 1598 # There are several sources that claim that Paraguay made 1599 # a timezone rule change in autumn 2004. 1600 # From Steffen Thorsen (2005-01-05): 1601 # Decree 1,867 (2004-03-05) 1602 # From Carlos Raúl Perasso via Jesper Nørgaard Welen (2006-10-13) 1603 # http://www.presidencia.gov.py/decretos/D1867.pdf 1604 Rule Para 2004 2009 - Oct Sun>=15 0:00 1:00 S 1605 Rule Para 2005 2009 - Mar Sun>=8 0:00 0 - 1606 # From Carlos Raúl Perasso (2010-02-18): 1607 # By decree number 3958 issued yesterday 1608 # http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf 1609 # Paraguay changes its DST schedule, postponing the March rule to April and 1610 # modifying the October date. The decree reads: 1611 # ... 1612 # Art. 1. It is hereby established that from the second Sunday of the month of 1613 # April of this year (2010), the official time is to be set back 60 minutes, 1614 # and that on the first Sunday of the month of October, it is to be set 1615 # forward 60 minutes, in all the territory of the Paraguayan Republic. 1616 # ... 1617 Rule Para 2010 max - Oct Sun>=1 0:00 1:00 S 1618 Rule Para 2010 2012 - Apr Sun>=8 0:00 0 - 1619 # 1620 # From Steffen Thorsen (2013-03-07): 1621 # Paraguay will end DST on 2013-03-24 00:00.... 1622 # http://www.ande.gov.py/interna.php?id=1075 1623 # 1624 # From Carlos Raúl Perasso (2013-03-15): 1625 # The change in Paraguay is now final. Decree number 10780 1626 # http://www.presidencia.gov.py/uploads/pdf/presidencia-3b86ff4b691c79d4f5927ca964922ec74772ce857c02ca054a52a37b49afc7fb.pdf 1627 # From Carlos Raúl Perasso (2014-02-28): 1628 # Decree 1264 can be found at: 1629 # http://www.presidencia.gov.py/archivos/documentos/DECRETO1264_ey9r8zai.pdf 1630 Rule Para 2013 max - Mar Sun>=22 0:00 0 - 1631 1632 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1633 Zone America/Asuncion -3:50:40 - LMT 1890 1634 -3:50:40 - AMT 1931 Oct 10 # Asunción Mean Time 1635 -4:00 - -04 1972 Oct 1636 -3:00 - -03 1974 Apr 1637 -4:00 Para -04/-03 1638 1639 # Peru 1640 # 1641 # From Evelyn C. Leeper via Mark Brader (2003-10-26) 1642 # <news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net>: 1643 # When we were in Peru in 1985-1986, they apparently switched over 1644 # sometime between December 29 and January 3 while we were on the Amazon. 1645 # 1646 # From Paul Eggert (2006-03-22): 1647 # Shanks & Pottenger don't have this transition. Assume 1986 was like 1987. 1648 1649 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1650 Rule Peru 1938 only - Jan 1 0:00 1:00 S 1651 Rule Peru 1938 only - Apr 1 0:00 0 - 1652 Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S 1653 Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 - 1654 Rule Peru 1986 1987 - Jan 1 0:00 1:00 S 1655 Rule Peru 1986 1987 - Apr 1 0:00 0 - 1656 Rule Peru 1990 only - Jan 1 0:00 1:00 S 1657 Rule Peru 1990 only - Apr 1 0:00 0 - 1658 # IATA is ambiguous for 1993/1995; go with Shanks & Pottenger. 1659 Rule Peru 1994 only - Jan 1 0:00 1:00 S 1660 Rule Peru 1994 only - Apr 1 0:00 0 - 1661 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1662 Zone America/Lima -5:08:12 - LMT 1890 1663 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time? 1664 -5:00 Peru -05/-04 1665 1666 # South Georgia 1667 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1668 Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken 1669 -2:00 - -02 1670 1671 # South Sandwich Is 1672 # uninhabited; scientific personnel have wintered 1673 1674 # Suriname 1675 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1676 Zone America/Paramaribo -3:40:40 - LMT 1911 1677 -3:40:52 - PMT 1935 # Paramaribo Mean Time 1678 -3:40:36 - PMT 1945 Oct # The capital moved? 1679 -3:30 - -0330 1984 Oct 1680 -3:00 - -03 1681 1682 # Trinidad and Tobago 1683 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1684 Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2 1685 -4:00 - AST 1686 1687 # These all agree with Trinidad and Tobago since 1970. 1688 Link America/Port_of_Spain America/Anguilla 1689 Link America/Port_of_Spain America/Antigua 1690 Link America/Port_of_Spain America/Dominica 1691 Link America/Port_of_Spain America/Grenada 1692 Link America/Port_of_Spain America/Guadeloupe 1693 Link America/Port_of_Spain America/Marigot # St Martin (French part) 1694 Link America/Port_of_Spain America/Montserrat 1695 Link America/Port_of_Spain America/St_Barthelemy # St Barthélemy 1696 Link America/Port_of_Spain America/St_Kitts # St Kitts & Nevis 1697 Link America/Port_of_Spain America/St_Lucia 1698 Link America/Port_of_Spain America/St_Thomas # Virgin Islands (US) 1699 Link America/Port_of_Spain America/St_Vincent 1700 Link America/Port_of_Spain America/Tortola # Virgin Islands (UK) 1701 1702 # Uruguay 1703 # From Paul Eggert (1993-11-18): 1704 # Uruguay wins the prize for the strangest peacetime manipulation of the rules. 1705 # From Shanks & Pottenger: 1706 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1707 # Whitman gives 1923 Oct 1; go with Shanks & Pottenger. 1708 Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS 1709 Rule Uruguay 1924 1926 - Apr 1 0:00 0 - 1710 Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS 1711 Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS 1712 # Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman. 1713 Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 - 1714 Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS 1715 Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 - 1716 # Whitman gives 1937 Oct 3; go with Shanks & Pottenger. 1717 Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS 1718 # Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13, 1719 # and 1943 Apr 13 "to present time"; go with Shanks & Pottenger. 1720 Rule Uruguay 1941 only - Aug 1 0:00 0:30 HS 1721 Rule Uruguay 1942 only - Jan 1 0:00 0 - 1722 Rule Uruguay 1942 only - Dec 14 0:00 1:00 S 1723 Rule Uruguay 1943 only - Mar 14 0:00 0 - 1724 Rule Uruguay 1959 only - May 24 0:00 1:00 S 1725 Rule Uruguay 1959 only - Nov 15 0:00 0 - 1726 Rule Uruguay 1960 only - Jan 17 0:00 1:00 S 1727 Rule Uruguay 1960 only - Mar 6 0:00 0 - 1728 Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S 1729 Rule Uruguay 1965 only - Sep 26 0:00 0 - 1730 Rule Uruguay 1966 1967 - Oct 31 0:00 0 - 1731 Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS 1732 Rule Uruguay 1968 1970 - Dec 2 0:00 0 - 1733 Rule Uruguay 1972 only - Apr 24 0:00 1:00 S 1734 Rule Uruguay 1972 only - Aug 15 0:00 0 - 1735 Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS 1736 Rule Uruguay 1974 only - Dec 22 0:00 1:00 S 1737 Rule Uruguay 1976 only - Oct 1 0:00 0 - 1738 Rule Uruguay 1977 only - Dec 4 0:00 1:00 S 1739 Rule Uruguay 1978 only - Apr 1 0:00 0 - 1740 Rule Uruguay 1979 only - Oct 1 0:00 1:00 S 1741 Rule Uruguay 1980 only - May 1 0:00 0 - 1742 Rule Uruguay 1987 only - Dec 14 0:00 1:00 S 1743 Rule Uruguay 1988 only - Mar 14 0:00 0 - 1744 Rule Uruguay 1988 only - Dec 11 0:00 1:00 S 1745 Rule Uruguay 1989 only - Mar 12 0:00 0 - 1746 Rule Uruguay 1989 only - Oct 29 0:00 1:00 S 1747 # Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2, 1748 # and that 1992/3's DST was from 10-25 to 03-01. Go with IATA. 1749 Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 - 1750 Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S 1751 Rule Uruguay 1992 only - Oct 18 0:00 1:00 S 1752 Rule Uruguay 1993 only - Feb 28 0:00 0 - 1753 # From Eduardo Cota (2004-09-20): 1754 # The Uruguayan government has decreed a change in the local time.... 1755 # http://www.presidencia.gub.uy/decretos/2004091502.htm 1756 Rule Uruguay 2004 only - Sep 19 0:00 1:00 S 1757 # From Steffen Thorsen (2005-03-11): 1758 # Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to 1759 # save energy ... it was postponed two weeks.... 1760 # http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm 1761 Rule Uruguay 2005 only - Mar 27 2:00 0 - 1762 # From Eduardo Cota (2005-09-27): 1763 # http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF 1764 # This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at 1765 # 02:00 local time, official time in Uruguay will be at GMT -2. 1766 Rule Uruguay 2005 only - Oct 9 2:00 1:00 S 1767 Rule Uruguay 2006 only - Mar 12 2:00 0 - 1768 # From Jesper Nørgaard Welen (2006-09-06): 1769 # http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF 1770 # 1771 # From Steffen Thorsen (2015-06-30): 1772 # ... it looks like they will not be using DST the coming summer: 1773 # http://www.elobservador.com.uy/gobierno-resolvio-que-no-habra-cambio-horario-verano-n656787 1774 # http://www.republica.com.uy/este-ano-no-se-modificara-el-huso-horario-en-uruguay/523760/ 1775 # From Paul Eggert (2015-06-30): 1776 # Apparently restaurateurs complained that DST caused people to go to the beach 1777 # instead of out to dinner. 1778 # From Pablo Camargo (2015-07-13): 1779 # http://archivo.presidencia.gub.uy/sci/decretos/2015/06/cons_min_201.pdf 1780 # [dated 2015-06-29; repeals Decree 311/006 dated 2006-09-04] 1781 Rule Uruguay 2006 2014 - Oct Sun>=1 2:00 1:00 S 1782 Rule Uruguay 2007 2015 - Mar Sun>=8 2:00 0 - 1783 1784 # This Zone can be simplified once we assume zic %z. 1785 Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28 1786 -3:44:44 - MMT 1920 May 1 # Montevideo MT 1787 -3:30 Uruguay -0330/-03 1942 Dec 14 1788 -3:00 Uruguay -03/-02 1968 1789 -3:00 Uruguay -03/-0230 1971 1790 -3:00 Uruguay -03/-02 1974 1791 -3:00 Uruguay -03/-0230 1974 Dec 22 1792 -3:00 Uruguay -03/-02 1793 1794 # Venezuela 1795 # 1796 # From Paul Eggert (2015-07-28): 1797 # For the 1965 transition see Gaceta Oficial No. 27.619 (1964-12-15), p 205.533 1798 # http://www.pgr.gob.ve/dmdocuments/1964/27619.pdf 1799 # 1800 # From John Stainforth (2007-11-28): 1801 # ... the change for Venezuela originally expected for 2007-12-31 has 1802 # been brought forward to 2007-12-09. The official announcement was 1803 # published today in the "Gaceta Oficial de la República Bolivariana 1804 # de Venezuela, número 38.819" (official document for all laws or 1805 # resolution publication) 1806 # http://www.globovision.com/news.php?nid=72208 1807 1808 # From Alexander Krivenyshev (2016-04-15): 1809 # https://actualidad.rt.com/actualidad/204758-venezuela-modificar-huso-horario-sequia-elnino 1810 # 1811 # From Paul Eggert (2016-04-15): 1812 # Clocks advance 30 minutes on 2016-05-01 at 02:30.... 1813 # "'Venezuela's new time-zone: hours without light, hours without water, 1814 # hours of presidential broadcasts, hours of lines,' quipped comedian 1815 # Jean Mary Curró ...". See: Cawthorne A, Kai D. Venezuela scraps 1816 # half-hour time difference set by Chavez. Reuters 2016-04-15 14:50 -0400 1817 # https://www.reuters.com/article/us-venezuela-timezone-idUSKCN0XC2BE 1818 # 1819 # From Matt Johnson (2016-04-20): 1820 # ... published in the official Gazette [2016-04-18], here: 1821 # http://historico.tsj.gob.ve/gaceta_ext/abril/1842016/E-1842016-4551.pdf 1822 1823 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1824 Zone America/Caracas -4:27:44 - LMT 1890 1825 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time? 1826 -4:30 - -0430 1965 Jan 1 0:00 1827 -4:00 - -04 2007 Dec 9 3:00 1828 -4:30 - -0430 2016 May 1 2:30 1829 -4:00 - -04