southamerica revision 1.1.1.11.4.1
1 # This file is in the public domain, so clarified as of 2 # 2009-05-17 by Arthur David Olson. 3 4 # This file 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 (a] iana.org for general use in the future). For more, please see 7 # the file CONTRIBUTING in the tz distribution. 8 9 # From Paul Eggert (2016-12-05): 10 # 11 # Unless otherwise specified, the source for data through 1990 is: 12 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 13 # San Diego: ACS Publications, Inc. (2003). 14 # Unfortunately this book contains many errors and cites no sources. 15 # 16 # Many years ago Gwillim Law wrote that a good source 17 # for time zone data was the International Air Transport 18 # Association's Standard Schedules Information Manual (IATA SSIM), 19 # published semiannually. Law sent in several helpful summaries 20 # of the IATA's data after 1990. Except where otherwise noted, 21 # IATA SSIM is the source for entries after 1990. 22 # 23 # For data circa 1899, a common source is: 24 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94. 25 # https://www.jstor.org/stable/1774359 26 # 27 # These tables use numeric abbreviations like -03 and -0330 for 28 # integer hour and minute UTC offsets. Although earlier editions used 29 # alphabetic time zone abbreviations, these abbreviations were 30 # invented and did not reflect common practice. 31 32 ############################################################################### 33 34 ############################################################################### 35 36 # Argentina 37 38 # From Bob Devine (1988-01-28): 39 # Argentina: first Sunday in October to first Sunday in April since 1976. 40 # Double Summer time from 1969 to 1974. Switches at midnight. 41 42 # From U. S. Naval Observatory (1988-01-19): 43 # ARGENTINA 3 H BEHIND UTC 44 45 # From Hernan G. Otero (1995-06-26): 46 # I am sending modifications to the Argentine time zone table... 47 # AR was chosen because they are the ISO letters that represent Argentina. 48 49 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 50 Rule Arg 1930 only - Dec 1 0:00 1:00 S 51 Rule Arg 1931 only - Apr 1 0:00 0 - 52 Rule Arg 1931 only - Oct 15 0:00 1:00 S 53 Rule Arg 1932 1940 - Mar 1 0:00 0 - 54 Rule Arg 1932 1939 - Nov 1 0:00 1:00 S 55 Rule Arg 1940 only - Jul 1 0:00 1:00 S 56 Rule Arg 1941 only - Jun 15 0:00 0 - 57 Rule Arg 1941 only - Oct 15 0:00 1:00 S 58 Rule Arg 1943 only - Aug 1 0:00 0 - 59 Rule Arg 1943 only - Oct 15 0:00 1:00 S 60 Rule Arg 1946 only - Mar 1 0:00 0 - 61 Rule Arg 1946 only - Oct 1 0:00 1:00 S 62 Rule Arg 1963 only - Oct 1 0:00 0 - 63 Rule Arg 1963 only - Dec 15 0:00 1:00 S 64 Rule Arg 1964 1966 - Mar 1 0:00 0 - 65 Rule Arg 1964 1966 - Oct 15 0:00 1:00 S 66 Rule Arg 1967 only - Apr 2 0:00 0 - 67 Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S 68 Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 - 69 Rule Arg 1974 only - Jan 23 0:00 1:00 S 70 Rule Arg 1974 only - May 1 0:00 0 - 71 Rule Arg 1988 only - Dec 1 0:00 1:00 S 72 # 73 # From Hernan G. Otero (1995-06-26): 74 # These corrections were contributed by InterSoft Argentina S.A., 75 # obtaining the data from the: 76 # Talleres de Hidrografa Naval Argentina 77 # (Argentine Naval Hydrography Institute) 78 Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 - 79 Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S 80 # 81 # From Hernan G. Otero (1995-06-26): 82 # From this moment on, the law that mandated the daylight saving 83 # time corrections was derogated and no more modifications 84 # to the time zones (for daylight saving) are now made. 85 # 86 # From Rives McDow (2000-01-10): 87 # On October 3, 1999, 0:00 local, Argentina implemented daylight savings time, 88 # which did not result in the switch of a time zone, as they stayed 9 hours 89 # from the International Date Line. 90 Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S 91 # From Paul Eggert (2007-12-28): 92 # DST was set to expire on March 5, not March 3, but since it was converted 93 # to standard time on March 3 it's more convenient for us to pretend that 94 # it ended on March 3. 95 Rule Arg 2000 only - Mar 3 0:00 0 - 96 # 97 # From Peter Gradelski via Steffen Thorsen (2000-03-01): 98 # We just checked with our So Paulo office and they say the government of 99 # Argentina decided not to become one of the countries that go on or off DST. 100 # So Buenos Aires should be -3 hours from GMT at all times. 101 # 102 # From Fabin L. Arce Jofr (2000-04-04): 103 # The law that claimed DST for Argentina was derogated by President Fernando 104 # de la Ra on March 2, 2000, because it would make people spend more energy 105 # in the winter time, rather than less. The change took effect on March 3. 106 # 107 # From Mariano Absatz (2001-06-06): 108 # one of the major newspapers here in Argentina said that the 1999 109 # Timezone Law (which never was effectively applied) will (would?) be 110 # in effect.... The article is at 111 # http://ar.clarin.com/diario/2001-06-06/e-01701.htm 112 # ... The Law itself is "Ley No. 25155", sanctioned on 1999-08-25, enacted 113 # 1999-09-17, and published 1999-09-21. The official publication is at: 114 # http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF 115 # Regretfully, you have to subscribe (and pay) for the on-line version.... 116 # 117 # (2001-06-12): 118 # the timezone for Argentina will not change next Sunday. 119 # Apparently it will do so on Sunday 24th.... 120 # http://ar.clarin.com/diario/2001-06-12/s-03501.htm 121 # 122 # (2001-06-25): 123 # Last Friday (yes, the last working day before the date of the change), the 124 # Senate annulled the 1999 law that introduced the changes later postponed. 125 # http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm 126 # It remains the vote of the Deputies..., but it will be the same.... 127 # This kind of things had always been done this way in Argentina. 128 # We are still -03:00 all year round in all of the country. 129 # 130 # From Steffen Thorsen (2007-12-21): 131 # A user (Leonardo Chaim) reported that Argentina will adopt DST.... 132 # all of the country (all Zone-entries) are affected. News reports like 133 # http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate 134 # that Argentina will use DST next year as well, from October to 135 # March, although exact rules are not given. 136 # 137 # From Jesper Nrgaard Welen (2007-12-26) 138 # The last hurdle of Argentina DST is over, the proposal was approved in 139 # the lower chamber too (Diputados) with a vote 192 for and 2 against. 140 # By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to 141 # the original scanned proposal, where the dates and the zero hours are 142 # clear and unambiguous...This is the article about final approval: 143 # http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996 144 # 145 # From Paul Eggert (2007-12-22): 146 # For dates after mid-2008, the following rules are my guesses and 147 # are quite possibly wrong, but are more likely than no DST at all. 148 149 # From Alexander Krivenyshev (2008-09-05): 150 # As per message from Carlos Alberto Fonseca Arauz (Nicaragua), 151 # Argentina will start DST on Sunday October 19, 2008. 152 # 153 # http://www.worldtimezone.com/dst_news/dst_news_argentina03.html 154 # http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish) 155 156 # From Juan Manuel Docile in https://bugs.gentoo.org/240339 (2008-10-07) 157 # via Rodrigo Severo: 158 # Argentinian law No. 25.155 is no longer valid. 159 # http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm 160 # The new one is law No. 26.350 161 # http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm 162 # So there is no summer time in Argentina for now. 163 164 # From Mariano Absatz (2008-10-20): 165 # Decree 1693/2008 applies Law 26.350 for the summer 2008/2009 establishing DST 166 # in Argentina from 2008-10-19 until 2009-03-15. 167 # http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01 168 # 169 170 # Decree 1705/2008 excepting 12 Provinces from applying DST in the summer 171 # 2008/2009: Catamarca, La Rioja, Mendoza, Salta, San Juan, San Luis, La 172 # Pampa, Neuqun, Rio Negro, Chubut, Santa Cruz and Tierra del Fuego 173 # http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01 174 # 175 # Press release 235 dated Saturday October 18th, from the Government of the 176 # Province of Jujuy saying it will not apply DST either (even when it was not 177 # included in Decree 1705/2008). 178 # http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc 179 180 # From fullinet (2009-10-18): 181 # As announced in 182 # http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356 183 # (an official .gob.ar) under title: "Sin Cambio de Hora" 184 # (English: "No hour change"). 185 # 186 # "Por el momento, el Gobierno Nacional resolvi no modificar la hora 187 # oficial, decisin que estaba en estudio para su implementacin el 188 # domingo 18 de octubre. Desde el Ministerio de Planificacin se anunci 189 # que la Argentina hoy, en estas condiciones meteorolgicas, no necesita 190 # la modificacin del huso horario, ya que 2009 nos encuentra con 191 # crecimiento en la produccin y distribucin energtica." 192 193 Rule Arg 2007 only - Dec 30 0:00 1:00 S 194 Rule Arg 2008 2009 - Mar Sun>=15 0:00 0 - 195 Rule Arg 2008 only - Oct Sun>=15 0:00 1:00 S 196 197 # From Mariano Absatz (2004-05-21): 198 # Today it was officially published that the Province of Mendoza is changing 199 # its timezone this winter... starting tomorrow night.... 200 # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf 201 # From Paul Eggert (2004-05-24): 202 # It's Law No. 7,210. This change is due to a public power emergency, so for 203 # now we'll assume it's for this year only. 204 # 205 # From Paul Eggert (2014-08-09): 206 # Hora de verano para la Repblica Argentina 207 # http://buenasiembra.com.ar/esoterismo/astrologia/hora-de-verano-de-la-republica-argentina-27.html 208 # says that standard time in Argentina from 1894-10-31 209 # to 1920-05-01 was -4:16:48.25. Go with this more-precise value 210 # over Shanks & Pottenger. 211 # 212 # From Mariano Absatz (2004-06-05): 213 # These media articles from a major newspaper mostly cover the current state: 214 # http://www.lanacion.com.ar/04/05/27/de_604825.asp 215 # http://www.lanacion.com.ar/04/05/28/de_605203.asp 216 # 217 # The following eight (8) provinces pulled clocks back to UTC-04:00 at 218 # midnight Monday May 31st. (that is, the night between 05/31 and 06/01). 219 # Apparently, all nine provinces would go back to UTC-03:00 at the same 220 # time in October 17th. 221 # 222 # Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz, 223 # Tierra del Fuego, Tucumn. 224 # 225 # From Mariano Absatz (2004-06-14): 226 # ... this weekend, the Province of Tucumn decided it'd go back to UTC-03:00 227 # yesterday midnight (that is, at 24:00 Saturday 12th), since the people's 228 # annoyance with the change is much higher than the power savings obtained.... 229 # 230 # From Gwillim Law (2004-06-14): 231 # http://www.lanacion.com.ar/04/06/10/de_609078.asp ... 232 # "The time change in Tierra del Fuego was a conflicted decision from 233 # the start. The government had decreed that the measure would take 234 # effect on June 1, but a normative error forced the new time to begin 235 # three days earlier, from a Saturday to a Sunday.... 236 # Our understanding was that the change was originally scheduled to take place 237 # on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other 238 # provinces). Sunday was May 30, only two days earlier. So the article 239 # contains a contradiction. I would give more credence to the Saturday/Sunday 240 # date than the "three days earlier" phrase, and conclude that Tierra del 241 # Fuego set its clocks back at 2004-05-30 00:00. 242 # 243 # From Steffen Thorsen (2004-10-05): 244 # The previous law 7210 which changed the province of Mendoza's time zone 245 # back in May have been modified slightly in a new law 7277, which set the 246 # new end date to 2004-09-26 (original date was 2004-10-17). 247 # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf 248 # 249 # From Mariano Absatz (2004-10-05): 250 # San Juan changed from UTC-03:00 to UTC-04:00 at midnight between 251 # Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00 252 # at midnight between Saturday, July 24th and Sunday, July 25th.... 253 # http://www.sanjuan.gov.ar/prensa/archivo/000329.html 254 # http://www.sanjuan.gov.ar/prensa/archivo/000426.html 255 # http://www.sanjuan.gov.ar/prensa/archivo/000441.html 256 257 # From Alex Krivenyshev (2008-01-17): 258 # Here are articles that Argentina Province San Luis is planning to end DST 259 # as earlier as upcoming Monday January 21, 2008 or February 2008: 260 # 261 # Provincia argentina retrasa reloj y marca diferencia con resto del pas 262 # (Argentine Province delayed clock and mark difference with the rest of the 263 # country) 264 # http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel 265 # 266 # Es inminente que en San Luis atrasen una hora los relojes 267 # (It is imminent in San Luis clocks one hour delay) 268 # https://www.lagaceta.com.ar/nota/253414/Economia/Es-inminente-que-en-San-Luis-atrasen-una-hora-los-relojes.html 269 # http://www.worldtimezone.com/dst_news/dst_news_argentina02.html 270 271 # From Jesper Nrgaard Welen (2008-01-18): 272 # The page of the San Luis provincial government 273 # http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812 274 # confirms what Alex Krivenyshev has earlier sent to the tz 275 # emailing list about that San Luis plans to return to standard 276 # time much earlier than the rest of the country. It also 277 # confirms that upon request the provinces San Juan and Mendoza 278 # refused to follow San Luis in this change. 279 # 280 # The change is supposed to take place Monday the 21st at 0:00 281 # hours. As far as I understand it if this goes ahead, we need 282 # a new timezone for San Luis (although there are also documented 283 # independent changes in the southamerica file of San Luis in 284 # 1990 and 1991 which has not been confirmed). 285 286 # From Jesper Nrgaard Welen (2008-01-25): 287 # Unfortunately the below page has become defunct, about the San Luis 288 # time change. Perhaps because it now is part of a group of pages "Most 289 # important pages of 2008." 290 # 291 # You can use 292 # http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834 293 # instead it seems. Or use "Buscador" from the main page of the San Luis 294 # government, and fill in "huso" and click OK, and you will get 3 pages 295 # from which the first one is identical to the above. 296 297 # From Mariano Absatz (2008-01-28): 298 # I can confirm that the Province of San Luis (and so far only that 299 # province) decided to go back to UTC-3 effective midnight Jan 20th 2008 300 # (that is, Monday 21st at 0:00 is the time the clocks were delayed back 301 # 1 hour), and they intend to keep UTC-3 as their timezone all year round 302 # (that is, unless they change their mind any minute now). 303 # 304 # So we'll have to add yet another city to 'southamerica' (I think San 305 # Luis city is the mos populated city in the Province, so it'd be 306 # America/Argentina/San_Luis... of course I can't remember if San Luis's 307 # history of particular changes goes along with Mendoza or San Juan :-( 308 # (I only remember not being able to collect hard facts about San Luis 309 # back in 2004, when these provinces changed to UTC-4 for a few days, I 310 # mailed them personally and never got an answer). 311 312 # From Paul Eggert (2014-08-12): 313 # Unless otherwise specified, data entries are from Shanks & Pottenger through 314 # 1992, from the IATA otherwise. As noted below, Shanks & Pottenger say that 315 # America/Cordoba split into 6 subregions during 1991/1992, one of which 316 # was America/San_Luis, but we haven't verified this yet so for now we'll 317 # keep America/Cordoba a single region rather than splitting it into the 318 # other 5 subregions. 319 320 # From Mariano Absatz (2009-03-13): 321 # Yesterday (with our usual 2-day notice) the Province of San Luis 322 # decided that next Sunday instead of "staying" @utc-03:00 they will go 323 # to utc-04:00 until the second Saturday in October... 324 # 325 # The press release is at 326 # http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102 327 # (I couldn't find the decree, but www.sanluis.gov.ar 328 # is the official page for the Province Government.) 329 # 330 # There's also a note in only one of the major national papers ... 331 # http://www.lanacion.com.ar/nota.asp?nota_id=1107912 332 # 333 # The press release says [quick and dirty translation]: 334 # ... announced that next Sunday, at 00:00, Puntanos (the San Luis 335 # inhabitants) will have to turn back one hour their clocks 336 # 337 # Since then, San Luis will establish its own Province timezone. Thus, 338 # during 2009, this timezone change will run from 00:00 the third Sunday 339 # in March until 24:00 of the second Saturday in October. 340 341 # From Mariano Absatz (2009-10-16): 342 # ...the Province of San Luis is a case in itself. 343 # 344 # The Law at 345 # http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276 346 # is ambiguous because establishes a calendar from the 2nd Sunday in 347 # October at 0:00 thru the 2nd Saturday in March at 24:00 and the 348 # complement of that starting on the 2nd Sunday of March at 0:00 and 349 # ending on the 2nd Saturday of March at 24:00. 350 # 351 # This clearly breaks every time the 1st of March or October is a Sunday. 352 # 353 # IMHO, the "spirit of the Law" is to make the changes at 0:00 on the 2nd 354 # Sunday of October and March. 355 # 356 # The problem is that the changes in the rest of the Provinces that did 357 # change in 2007/2008, were made according to the Federal Law and Decrees 358 # that did so on the 3rd Sunday of October and March. 359 # 360 # In fact, San Luis actually switched from UTC-4 to UTC-3 last Sunday 361 # (October 11th) at 0:00. 362 # 363 # So I guess a new set of rules, besides "Arg", must be made and the last 364 # America/Argentina/San_Luis entries should change to use these... 365 # ... 366 367 # From Alexander Krivenyshev (2010-04-09): 368 # According to news reports from El Diario de la Repblica Province San 369 # Luis, Argentina (standard time UTC-04) will keep Daylight Saving Time 370 # after April 11, 2010 - will continue to have same time as rest of 371 # Argentina (UTC-3) (no DST). 372 # 373 # Confirmaron la prrroga del huso horario de verano (Spanish) 374 # http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9 375 # or (some English translation): 376 # http://www.worldtimezone.com/dst_news/dst_news_argentina08.html 377 378 # From Mariano Absatz (2010-04-12): 379 # yes...I can confirm this...and given that San Luis keeps calling 380 # UTC-03:00 "summer time", we should't just let San Luis go back to "Arg" 381 # rules...San Luis is still using "Western ARgentina Time" and it got 382 # stuck on Summer daylight savings time even though the summer is over. 383 384 # From Paul Eggert (2013-09-05): 385 # Perhaps San Luis operates on the legal fiction that it is at -04 386 # with perpetual summer time, but ordinary usage typically seems to 387 # just say it's at -03; see, for example, 388 # https://es.wikipedia.org/wiki/Hora_oficial_argentina 389 # We've documented similar situations as being plain changes to 390 # standard time, so let's do that here too. This does not change UTC 391 # offsets, only tm_isdst and the time zone abbreviations. One minor 392 # plus is that this silences a zic complaint that there's no POSIX TZ 393 # setting for time stamps past 2038. 394 395 # From Paul Eggert (2013-02-21): 396 # Milne says Crdoba time was -4:16:48.2. Round to the nearest second. 397 398 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 399 # 400 # Buenos Aires (BA), Capital Federal (CF), 401 Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31 402 -4:16:48 - CMT 1920 May # Crdoba Mean Time 403 -4:00 - -04 1930 Dec 404 -4:00 Arg -04/-03 1969 Oct 5 405 -3:00 Arg -03/-02 1999 Oct 3 406 -4:00 Arg -04/-03 2000 Mar 3 407 -3:00 Arg -03/-02 408 # 409 # Crdoba (CB), Santa Fe (SF), Entre Ros (ER), Corrientes (CN), Misiones (MN), 410 # Chaco (CC), Formosa (FM), Santiago del Estero (SE) 411 # 412 # Shanks & Pottenger also make the following claims, which we haven't verified: 413 # - Formosa switched to -3:00 on 1991-01-07. 414 # - Misiones switched to -3:00 on 1990-12-29. 415 # - Chaco switched to -3:00 on 1991-01-04. 416 # - Santiago del Estero switched to -4:00 on 1991-04-01, 417 # then to -3:00 on 1991-04-26. 418 # 419 Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31 420 -4:16:48 - CMT 1920 May 421 -4:00 - -04 1930 Dec 422 -4:00 Arg -04/-03 1969 Oct 5 423 -3:00 Arg -03/-02 1991 Mar 3 424 -4:00 - -04 1991 Oct 20 425 -3:00 Arg -03/-02 1999 Oct 3 426 -4:00 Arg -04/-03 2000 Mar 3 427 -3:00 Arg -03/-02 428 # 429 # Salta (SA), La Pampa (LP), Neuqun (NQ), Rio Negro (RN) 430 Zone America/Argentina/Salta -4:21:40 - LMT 1894 Oct 31 431 -4:16:48 - CMT 1920 May 432 -4:00 - -04 1930 Dec 433 -4:00 Arg -04/-03 1969 Oct 5 434 -3:00 Arg -03/-02 1991 Mar 3 435 -4:00 - -04 1991 Oct 20 436 -3:00 Arg -03/-02 1999 Oct 3 437 -4:00 Arg -04/-03 2000 Mar 3 438 -3:00 Arg -03/-02 2008 Oct 18 439 -3:00 - -03 440 # 441 # Tucumn (TM) 442 Zone America/Argentina/Tucuman -4:20:52 - 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 - -03 2004 Jun 1 451 -4:00 - -04 2004 Jun 13 452 -3:00 Arg -03/-02 453 # 454 # La Rioja (LR) 455 Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31 456 -4:16:48 - CMT 1920 May 457 -4:00 - -04 1930 Dec 458 -4:00 Arg -04/-03 1969 Oct 5 459 -3:00 Arg -03/-02 1991 Mar 1 460 -4:00 - -04 1991 May 7 461 -3:00 Arg -03/-02 1999 Oct 3 462 -4:00 Arg -04/-03 2000 Mar 3 463 -3:00 - -03 2004 Jun 1 464 -4:00 - -04 2004 Jun 20 465 -3:00 Arg -03/-02 2008 Oct 18 466 -3:00 - -03 467 # 468 # San Juan (SJ) 469 Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31 470 -4:16:48 - CMT 1920 May 471 -4:00 - -04 1930 Dec 472 -4:00 Arg -04/-03 1969 Oct 5 473 -3:00 Arg -03/-02 1991 Mar 1 474 -4:00 - -04 1991 May 7 475 -3:00 Arg -03/-02 1999 Oct 3 476 -4:00 Arg -04/-03 2000 Mar 3 477 -3:00 - -03 2004 May 31 478 -4:00 - -04 2004 Jul 25 479 -3:00 Arg -03/-02 2008 Oct 18 480 -3:00 - -03 481 # 482 # Jujuy (JY) 483 Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31 484 -4:16:48 - CMT 1920 May 485 -4:00 - -04 1930 Dec 486 -4:00 Arg -04/-03 1969 Oct 5 487 -3:00 Arg -03/-02 1990 Mar 4 488 -4:00 - -04 1990 Oct 28 489 -4:00 1:00 -03 1991 Mar 17 490 -4:00 - -04 1991 Oct 6 491 -3:00 1:00 -02 1992 492 -3:00 Arg -03/-02 1999 Oct 3 493 -4:00 Arg -04/-03 2000 Mar 3 494 -3:00 Arg -03/-02 2008 Oct 18 495 -3:00 - -03 496 # 497 # Catamarca (CT), Chubut (CH) 498 Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31 499 -4:16:48 - CMT 1920 May 500 -4:00 - -04 1930 Dec 501 -4:00 Arg -04/-03 1969 Oct 5 502 -3:00 Arg -03/-02 1991 Mar 3 503 -4:00 - -04 1991 Oct 20 504 -3:00 Arg -03/-02 1999 Oct 3 505 -4:00 Arg -04/-03 2000 Mar 3 506 -3:00 - -03 2004 Jun 1 507 -4:00 - -04 2004 Jun 20 508 -3:00 Arg -03/-02 2008 Oct 18 509 -3:00 - -03 510 # 511 # Mendoza (MZ) 512 Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31 513 -4:16:48 - CMT 1920 May 514 -4:00 - -04 1930 Dec 515 -4:00 Arg -04/-03 1969 Oct 5 516 -3:00 Arg -03/-02 1990 Mar 4 517 -4:00 - -04 1990 Oct 15 518 -4:00 1:00 -03 1991 Mar 1 519 -4:00 - -04 1991 Oct 15 520 -4:00 1:00 -03 1992 Mar 1 521 -4:00 - -04 1992 Oct 18 522 -3:00 Arg -03/-02 1999 Oct 3 523 -4:00 Arg -04/-03 2000 Mar 3 524 -3:00 - -03 2004 May 23 525 -4:00 - -04 2004 Sep 26 526 -3:00 Arg -03/-02 2008 Oct 18 527 -3:00 - -03 528 # 529 # San Luis (SL) 530 531 Rule SanLuis 2008 2009 - Mar Sun>=8 0:00 0 - 532 Rule SanLuis 2007 2008 - Oct Sun>=8 0:00 1:00 S 533 534 Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31 535 -4:16:48 - CMT 1920 May 536 -4:00 - -04 1930 Dec 537 -4:00 Arg -04/-03 1969 Oct 5 538 -3:00 Arg -03/-02 1990 539 -3:00 1:00 -02 1990 Mar 14 540 -4:00 - -04 1990 Oct 15 541 -4:00 1:00 -03 1991 Mar 1 542 -4:00 - -04 1991 Jun 1 543 -3:00 - -03 1999 Oct 3 544 -4:00 1:00 -03 2000 Mar 3 545 -3:00 - -03 2004 May 31 546 -4:00 - -04 2004 Jul 25 547 -3:00 Arg -03/-02 2008 Jan 21 548 -4:00 SanLuis -04/-03 2009 Oct 11 549 -3:00 - -03 550 # 551 # Santa Cruz (SC) 552 Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31 553 -4:16:48 - CMT 1920 May 554 -4:00 - -04 1930 Dec 555 -4:00 Arg -04/-03 1969 Oct 5 556 -3:00 Arg -03/-02 1999 Oct 3 557 -4:00 Arg -04/-03 2000 Mar 3 558 -3:00 - -03 2004 Jun 1 559 -4:00 - -04 2004 Jun 20 560 -3:00 Arg -03/-02 2008 Oct 18 561 -3:00 - -03 562 # 563 # Tierra del Fuego, Antrtida e Islas del Atlntico Sur (TF) 564 Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31 565 -4:16:48 - CMT 1920 May 566 -4:00 - -04 1930 Dec 567 -4:00 Arg -04/-03 1969 Oct 5 568 -3:00 Arg -03/-02 1999 Oct 3 569 -4:00 Arg -04/-03 2000 Mar 3 570 -3:00 - -03 2004 May 30 571 -4:00 - -04 2004 Jun 20 572 -3:00 Arg -03/-02 2008 Oct 18 573 -3:00 - -03 574 575 # Aruba 576 Link America/Curacao America/Aruba 577 578 # Bolivia 579 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 580 Zone America/La_Paz -4:32:36 - LMT 1890 581 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT 582 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST 583 -4:00 - -04 584 585 # Brazil 586 587 # From Paul Eggert (1993-11-18): 588 # The mayor of Rio recently attempted to change the time zone rules 589 # just in his city, in order to leave more summer time for the tourist trade. 590 # The rule change lasted only part of the day; 591 # the federal government refused to follow the city's rules, and business 592 # was in a chaos, so the mayor backed down that afternoon. 593 594 # From IATA SSIM (1996-02): 595 # _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS), 596 # Santa Catarina (SC), Paran (PR), So Paulo (SP), Rio de Janeiro (RJ), 597 # Esprito Santo (ES), Minas Gerais (MG), Bahia (BA), Gois (GO), 598 # Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL]. 599 # [The last three states are new to this issue of the IATA SSIM.] 600 601 # From Gwillim Law (1996-10-07): 602 # Geography, history (Tocantins was part of Gois until 1989), and other 603 # sources of time zone information lead me to believe that AL, SE, and TO were 604 # always in BR1, and so the only change was whether or not they observed DST.... 605 # The earliest issue of the SSIM I have is 2/91. Each issue from then until 606 # 9/95 says that DST is observed only in the ten states I quoted from 9/95, 607 # along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2 608 # (UTC-4).... The other two time zones given for Brazil are BR3, which is 609 # UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is 610 # UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's 611 # become part of the state of Pernambuco). The boundary between BR1 and BR2 612 # has never been clearly stated. They've simply been called East and West. 613 # However, some conclusions can be drawn from another IATA manual: the Airline 614 # Coding Directory, which lists close to 400 airports in Brazil. For each 615 # airport it gives a time zone which is coded to the SSIM. From that 616 # information, I'm led to conclude that the states of Amap (AP), Cear (CE), 617 # Maranho (MA), Paraba (PR), Pernambuco (PE), Piau (PI), and Rio Grande do 618 # Norte (RN), and the eastern part of Par (PA) are all in BR1 without DST. 619 620 # From Marcos Tadeu (1998-09-27): 621 # Brazilian official page <http://pcdsh01.on.br/verao1.html> 622 623 # From Jesper Nrgaard (2000-11-03): 624 # [For an official list of which regions in Brazil use which time zones, see:] 625 # http://pcdsh01.on.br/Fusbr.htm 626 # http://pcdsh01.on.br/Fusbrhv.htm 627 628 # From Celso Doria via David Madeo (2002-10-09): 629 # The reason for the delay this year has to do with elections in Brazil. 630 # 631 # Unlike in the United States, elections in Brazil are 100% computerized and 632 # the results are known almost immediately. Yesterday, it was the first 633 # round of the elections when 115 million Brazilians voted for President, 634 # Governor, Senators, Federal Deputies, and State Deputies. Nobody is 635 # counting (or re-counting) votes anymore and we know there will be a second 636 # round for the Presidency and also for some Governors. The 2nd round will 637 # take place on October 27th. 638 # 639 # The reason why the DST will only begin November 3rd is that the thousands 640 # of electoral machines used cannot have their time changed, and since the 641 # Constitution says the elections must begin at 8:00 AM and end at 5:00 PM, 642 # the Government decided to postpone DST, instead of changing the Constitution 643 # (maybe, for the next elections, it will be possible to change the clock)... 644 645 # From Rodrigo Severo (2004-10-04): 646 # It's just the biannual change made necessary by the much hyped, supposedly 647 # modern Brazilian eletronic voting machines which, apparently, can't deal 648 # with a time change between the first and the second rounds of the elections. 649 650 # From Steffen Thorsen (2007-09-20): 651 # Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00: 652 # http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975 653 654 # From Paul Schulze (2008-06-24): 655 # ...by law number 11.662 of April 24, 2008 (published in the "Diario 656 # Oficial da Unio"...) in Brazil there are changes in the timezones, 657 # effective today (00:00am at June 24, 2008) as follows: 658 # 659 # a) The timezone UTC+5 is extinguished, with all the Acre state and the 660 # part of the Amazonas state that had this timezone now being put to the 661 # timezone UTC+4 662 # b) The whole Par state now is put at timezone UTC+3, instead of just 663 # part of it, as was before. 664 # 665 # This change follows a proposal of senator Tiao Viana of Acre state, that 666 # proposed it due to concerns about open television channels displaying 667 # programs inappropriate to youths in the states that had the timezone 668 # UTC+5 too early in the night. In the occasion, some more corrections 669 # were proposed, trying to unify the timezones of any given state. This 670 # change modifies timezone rules defined in decree 2.784 of 18 June, 671 # 1913. 672 673 # From Rodrigo Severo (2008-06-24): 674 # Just correcting the URL: 675 # https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008 676 # 677 # As a result of the above Decree I believe the America/Rio_Branco 678 # timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall 679 # be created to represent the...west side of the Par State. I 680 # suggest this new timezone be called Santarem as the most 681 # important/populated city in the affected area. 682 # 683 # This new timezone would be the same as the Rio_Branco timezone up to 684 # the 2008/06/24 change which would be to UTC-3 instead of UTC-4. 685 686 # From Alex Krivenyshev (2008-06-24): 687 # This is a quick reference page for New and Old Brazil Time Zones map. 688 # http://www.worldtimezone.com/brazil-time-new-old.php 689 # 690 # - 4 time zones replaced by 3 time zones - eliminating time zone UTC-05 691 # (state Acre and the part of the Amazonas will be UTC/GMT-04) - western 692 # part of Par state is moving to one timezone UTC-03 (from UTC-04). 693 694 # From Paul Eggert (2002-10-10): 695 # The official decrees referenced below are mostly taken from 696 # Decretos sobre o Horrio de Vero no Brasil. 697 # http://pcdsh01.on.br/DecHV.html 698 699 # From Steffen Thorsen (2008-08-29): 700 # As announced by the government and many newspapers in Brazil late 701 # yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and 702 # it will end on 2009-02-15 (current rule for Brazil is fine). Based on 703 # past years experience with the elections, there was a good chance that 704 # the start was postponed to November, but it did not happen this year. 705 # 706 # It has not yet been posted to http://pcdsh01.on.br/DecHV.html 707 # 708 # An official page about it: 709 # http://www.mme.gov.br/site/news/detail.do?newsId=16722 710 # Note that this link does not always work directly, but must be accessed 711 # by going to 712 # http://www.mme.gov.br/first 713 # 714 # One example link that works directly: 715 # http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54 716 # (Portuguese) 717 # 718 # We have a written a short article about it as well: 719 # https://www.timeanddate.com/news/time/brazil-dst-2008-2009.html 720 # 721 # From Alexander Krivenyshev (2011-10-04): 722 # State Bahia will return to Daylight savings time this year after 8 years off. 723 # The announcement was made by Governor Jaques Wagner in an interview to a 724 # television station in Salvador. 725 726 # In Portuguese: 727 # http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html 728 # https://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html 729 730 # From Guilherme Bernardes Rodrigues (2011-10-07): 731 # There is news in the media, however there is still no decree about it. 732 # I just send a e-mail to Zulmira Brandao at http://pcdsh01.on.br/ the 733 # official agency about time in Brazil, and she confirmed that the old rule is 734 # still in force. 735 736 # From Guilherme Bernardes Rodrigues (2011-10-14) 737 # It's official, the President signed a decree that includes Bahia in summer 738 # time. 739 # [ and in a second message (same day): ] 740 # I found the decree. 741 # 742 # DECRETO No. 7.584, DE 13 DE OUTUBRO DE 2011 743 # Link : 744 # http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6 745 746 # From Kelley Cook (2012-10-16): 747 # The governor of state of Bahia in Brazil announced on Thursday that 748 # due to public pressure, he is reversing the DST policy they implemented 749 # last year and will not be going to Summer Time on October 21st.... 750 # http://www.correio24horas.com.br/r/artigo/apos-pressoes-wagner-suspende-horario-de-verao-na-bahia 751 752 # From Rodrigo Severo (2012-10-16): 753 # Tocantins state will have DST. 754 # https://noticias.terra.com.br/brasil/noticias/0,,OI6232536-EI306.html 755 756 # From Steffen Thorsen (2013-09-20): 757 # Tocantins in Brazil is very likely not to observe DST from October.... 758 # http://conexaoto.com.br/2013/09/18/ministerio-confirma-que-tocantins-esta-fora-do-horario-de-verao-em-2013-mas-falta-publicacao-de-decreto 759 # We will keep this article updated when this is confirmed: 760 # https://www.timeanddate.com/news/time/brazil-starts-dst-2013.html 761 762 # From Steffen Thorsen (2013-10-17): 763 # https://www.timeanddate.com/news/time/acre-amazonas-change-time-zone.html 764 # Senator Jorge Viana announced that Acre will change time zone on November 10. 765 # He did not specify the time of the change, nor if western parts of Amazonas 766 # will change as well. 767 # 768 # From Paul Eggert (2013-10-17): 769 # For now, assume western Amazonas will change as well. 770 771 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 772 # Decree 20,466 <http://pcdsh01.on.br/HV20466.htm> (1931-10-01) 773 # Decree 21,896 <http://pcdsh01.on.br/HV21896.htm> (1932-01-10) 774 Rule Brazil 1931 only - Oct 3 11:00 1:00 S 775 Rule Brazil 1932 1933 - Apr 1 0:00 0 - 776 Rule Brazil 1932 only - Oct 3 0:00 1:00 S 777 # Decree 23,195 <http://pcdsh01.on.br/HV23195.htm> (1933-10-10) 778 # revoked DST. 779 # Decree 27,496 <http://pcdsh01.on.br/HV27496.htm> (1949-11-24) 780 # Decree 27,998 <http://pcdsh01.on.br/HV27998.htm> (1950-04-13) 781 Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S 782 Rule Brazil 1950 only - Apr 16 1:00 0 - 783 Rule Brazil 1951 1952 - Apr 1 0:00 0 - 784 # Decree 32,308 <http://pcdsh01.on.br/HV32308.htm> (1953-02-24) 785 Rule Brazil 1953 only - Mar 1 0:00 0 - 786 # Decree 34,724 <http://pcdsh01.on.br/HV34724.htm> (1953-11-30) 787 # revoked DST. 788 # Decree 52,700 <http://pcdsh01.on.br/HV52700.htm> (1963-10-18) 789 # established DST from 1963-10-23 00:00 to 1964-02-29 00:00 790 # in SP, RJ, GB, MG, ES, due to the prolongation of the drought. 791 # Decree 53,071 <http://pcdsh01.on.br/HV53071.htm> (1963-12-03) 792 # extended the above decree to all of the national territory on 12-09. 793 Rule Brazil 1963 only - Dec 9 0:00 1:00 S 794 # Decree 53,604 <http://pcdsh01.on.br/HV53604.htm> (1964-02-25) 795 # extended summer time by one day to 1964-03-01 00:00 (start of school). 796 Rule Brazil 1964 only - Mar 1 0:00 0 - 797 # Decree 55,639 <http://pcdsh01.on.br/HV55639.htm> (1965-01-27) 798 Rule Brazil 1965 only - Jan 31 0:00 1:00 S 799 Rule Brazil 1965 only - Mar 31 0:00 0 - 800 # Decree 57,303 <http://pcdsh01.on.br/HV57303.htm> (1965-11-22) 801 Rule Brazil 1965 only - Dec 1 0:00 1:00 S 802 # Decree 57,843 <http://pcdsh01.on.br/HV57843.htm> (1966-02-18) 803 Rule Brazil 1966 1968 - Mar 1 0:00 0 - 804 Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S 805 # Decree 63,429 <http://pcdsh01.on.br/HV63429.htm> (1968-10-15) 806 # revoked DST. 807 # Decree 91,698 <http://pcdsh01.on.br/HV91698.htm> (1985-09-27) 808 Rule Brazil 1985 only - Nov 2 0:00 1:00 S 809 # Decree 92,310 (1986-01-21) 810 # Decree 92,463 (1986-03-13) 811 Rule Brazil 1986 only - Mar 15 0:00 0 - 812 # Decree 93,316 (1986-10-01) 813 Rule Brazil 1986 only - Oct 25 0:00 1:00 S 814 Rule Brazil 1987 only - Feb 14 0:00 0 - 815 # Decree 94,922 <http://pcdsh01.on.br/HV94922.htm> (1987-09-22) 816 Rule Brazil 1987 only - Oct 25 0:00 1:00 S 817 Rule Brazil 1988 only - Feb 7 0:00 0 - 818 # Decree 96,676 <http://pcdsh01.on.br/HV96676.htm> (1988-09-12) 819 # except for the states of AC, AM, PA, RR, RO, and AP (then a territory) 820 Rule Brazil 1988 only - Oct 16 0:00 1:00 S 821 Rule Brazil 1989 only - Jan 29 0:00 0 - 822 # Decree 98,077 <http://pcdsh01.on.br/HV98077.htm> (1989-08-21) 823 # with the same exceptions 824 Rule Brazil 1989 only - Oct 15 0:00 1:00 S 825 Rule Brazil 1990 only - Feb 11 0:00 0 - 826 # Decree 99,530 <http://pcdsh01.on.br/HV99530.htm> (1990-09-17) 827 # adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF. 828 # Decree 99,629 (1990-10-19) adds BA, MT. 829 Rule Brazil 1990 only - Oct 21 0:00 1:00 S 830 Rule Brazil 1991 only - Feb 17 0:00 0 - 831 # Unnumbered decree <http://pcdsh01.on.br/HV1991.htm> (1991-09-25) 832 # adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF. 833 Rule Brazil 1991 only - Oct 20 0:00 1:00 S 834 Rule Brazil 1992 only - Feb 9 0:00 0 - 835 # Unnumbered decree <http://pcdsh01.on.br/HV1992.htm> (1992-10-16) 836 # adopted by same states. 837 Rule Brazil 1992 only - Oct 25 0:00 1:00 S 838 Rule Brazil 1993 only - Jan 31 0:00 0 - 839 # Decree 942 <http://pcdsh01.on.br/HV942.htm> (1993-09-28) 840 # adopted by same states, plus AM. 841 # Decree 1,252 <http://pcdsh01.on.br/HV1252.htm> (1994-09-22; 842 # web page corrected 2004-01-07) adopted by same states, minus AM. 843 # Decree 1,636 <http://pcdsh01.on.br/HV1636.htm> (1995-09-14) 844 # adopted by same states, plus MT and TO. 845 # Decree 1,674 <http://pcdsh01.on.br/HV1674.htm> (1995-10-13) 846 # adds AL, SE. 847 Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S 848 Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 - 849 Rule Brazil 1996 only - Feb 11 0:00 0 - 850 # Decree 2,000 <http://pcdsh01.on.br/HV2000.htm> (1996-09-04) 851 # adopted by same states, minus AL, SE. 852 Rule Brazil 1996 only - Oct 6 0:00 1:00 S 853 Rule Brazil 1997 only - Feb 16 0:00 0 - 854 # From Daniel C. Sobral (1998-02-12): 855 # In 1997, the DS began on October 6. The stated reason was that 856 # because international television networks ignored Brazil's policy on DS, 857 # they bought the wrong times on satellite for coverage of Pope's visit. 858 # This year, the ending date of DS was postponed to March 1 859 # to help dealing with the shortages of electric power. 860 # 861 # Decree 2,317 (1997-09-04), adopted by same states. 862 Rule Brazil 1997 only - Oct 6 0:00 1:00 S 863 # Decree 2,495 <http://pcdsh01.on.br/figuras/HV2495.JPG> 864 # (1998-02-10) 865 Rule Brazil 1998 only - Mar 1 0:00 0 - 866 # Decree 2,780 <http://pcdsh01.on.br/figuras/Hv98.jpg> (1998-09-11) 867 # adopted by the same states as before. 868 Rule Brazil 1998 only - Oct 11 0:00 1:00 S 869 Rule Brazil 1999 only - Feb 21 0:00 0 - 870 # Decree 3,150 <http://pcdsh01.on.br/figuras/HV3150.gif> 871 # (1999-08-23) adopted by same states. 872 # Decree 3,188 <http://pcdsh01.on.br/DecHV99.gif> (1999-09-30) 873 # adds SE, AL, PB, PE, RN, CE, PI, MA and RR. 874 Rule Brazil 1999 only - Oct 3 0:00 1:00 S 875 Rule Brazil 2000 only - Feb 27 0:00 0 - 876 # Decree 3,592 <http://pcdsh01.on.br/DEC3592.htm> (2000-09-06) 877 # adopted by the same states as before. 878 # Decree 3,630 <http://pcdsh01.on.br/Dec3630.jpg> (2000-10-13) 879 # repeals DST in PE and RR, effective 2000-10-15 00:00. 880 # Decree 3,632 <http://pcdsh01.on.br/Dec3632.jpg> (2000-10-17) 881 # repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00. 882 # Decree 3,916 <http://pcdsh01.on.br/figuras/HV3916.gif> 883 # (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE. 884 Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S 885 Rule Brazil 2001 2006 - Feb Sun>=15 0:00 0 - 886 # Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE. 887 # 4,399 <http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm> 888 Rule Brazil 2002 only - Nov 3 0:00 1:00 S 889 # Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO. 890 # 4,844 <http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm> 891 Rule Brazil 2003 only - Oct 19 0:00 1:00 S 892 # Decree 5,223 (2004-10-01) reestablishes DST in MT. 893 # 5,223 <http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm> 894 Rule Brazil 2004 only - Nov 2 0:00 1:00 S 895 # Decree 5,539 <http://pcdsh01.on.br/DecHV5539.gif> (2005-09-19), 896 # adopted by the same states as before. 897 Rule Brazil 2005 only - Oct 16 0:00 1:00 S 898 # Decree 5,920 <http://pcdsh01.on.br/DecHV5920.gif> (2006-10-03), 899 # adopted by the same states as before. 900 Rule Brazil 2006 only - Nov 5 0:00 1:00 S 901 Rule Brazil 2007 only - Feb 25 0:00 0 - 902 # Decree 6,212 <http://pcdsh01.on.br/DecHV6212.gif> (2007-09-26), 903 # adopted by the same states as before. 904 Rule Brazil 2007 only - Oct Sun>=8 0:00 1:00 S 905 # From Frederico A. C. Neves (2008-09-10): 906 # According to this decree 907 # http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm 908 # [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the 909 # 3rd Feb Sunday. There is an exception on the return date when this is 910 # the Carnival Sunday then the return date will be the next Sunday... 911 Rule Brazil 2008 max - Oct Sun>=15 0:00 1:00 S 912 Rule Brazil 2008 2011 - Feb Sun>=15 0:00 0 - 913 Rule Brazil 2012 only - Feb Sun>=22 0:00 0 - 914 Rule Brazil 2013 2014 - Feb Sun>=15 0:00 0 - 915 Rule Brazil 2015 only - Feb Sun>=22 0:00 0 - 916 Rule Brazil 2016 2022 - Feb Sun>=15 0:00 0 - 917 Rule Brazil 2023 only - Feb Sun>=22 0:00 0 - 918 Rule Brazil 2024 2025 - Feb Sun>=15 0:00 0 - 919 Rule Brazil 2026 only - Feb Sun>=22 0:00 0 - 920 Rule Brazil 2027 2033 - Feb Sun>=15 0:00 0 - 921 Rule Brazil 2034 only - Feb Sun>=22 0:00 0 - 922 Rule Brazil 2035 2036 - Feb Sun>=15 0:00 0 - 923 Rule Brazil 2037 only - Feb Sun>=22 0:00 0 - 924 # From Arthur David Olson (2008-09-29): 925 # The next is wrong in some years but is better than nothing. 926 Rule Brazil 2038 max - Feb Sun>=15 0:00 0 - 927 928 # The latest ruleset listed above says that the following states observe DST: 929 # DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP. 930 931 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 932 # 933 # Fernando de Noronha (administratively part of PE) 934 Zone America/Noronha -2:09:40 - LMT 1914 935 -2:00 Brazil -02/-01 1990 Sep 17 936 -2:00 - -02 1999 Sep 30 937 -2:00 Brazil -02/-01 2000 Oct 15 938 -2:00 - -02 2001 Sep 13 939 -2:00 Brazil -02/-01 2002 Oct 1 940 -2:00 - -02 941 # Other Atlantic islands have no permanent settlement. 942 # These include Trindade and Martim Vaz (administratively part of ES), 943 # Rocas Atoll (RN), and the St Peter and St Paul Archipelago (PE). 944 # Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01; 945 # it also included the Penedos. 946 # 947 # Amap (AP), east Par (PA) 948 # East Par includes Belm, Marab, Serra Norte, and So Flix do Xingu. 949 # The division between east and west Par is the river Xingu. 950 # In the north a very small part from the river Javary (now Jari I guess, 951 # the border with Amap) to the Amazon, then to the Xingu. 952 Zone America/Belem -3:13:56 - LMT 1914 953 -3:00 Brazil -03/-02 1988 Sep 12 954 -3:00 - -03 955 # 956 # west Par (PA) 957 # West Par includes Altamira, bidos, Prainha, Oriximin, and Santarm. 958 Zone America/Santarem -3:38:48 - LMT 1914 959 -4:00 Brazil -04/-03 1988 Sep 12 960 -4:00 - -04 2008 Jun 24 0:00 961 -3:00 - -03 962 # 963 # Maranho (MA), Piau (PI), Cear (CE), Rio Grande do Norte (RN), 964 # Paraba (PB) 965 Zone America/Fortaleza -2:34:00 - LMT 1914 966 -3:00 Brazil -03/-02 1990 Sep 17 967 -3:00 - -03 1999 Sep 30 968 -3:00 Brazil -03/-02 2000 Oct 22 969 -3:00 - -03 2001 Sep 13 970 -3:00 Brazil -03/-02 2002 Oct 1 971 -3:00 - -03 972 # 973 # Pernambuco (PE) (except Atlantic islands) 974 Zone America/Recife -2:19:36 - LMT 1914 975 -3:00 Brazil -03/-02 1990 Sep 17 976 -3:00 - -03 1999 Sep 30 977 -3:00 Brazil -03/-02 2000 Oct 15 978 -3:00 - -03 2001 Sep 13 979 -3:00 Brazil -03/-02 2002 Oct 1 980 -3:00 - -03 981 # 982 # Tocantins (TO) 983 Zone America/Araguaina -3:12:48 - LMT 1914 984 -3:00 Brazil -03/-02 1990 Sep 17 985 -3:00 - -03 1995 Sep 14 986 -3:00 Brazil -03/-02 2003 Sep 24 987 -3:00 - -03 2012 Oct 21 988 -3:00 Brazil -03/-02 2013 Sep 989 -3:00 - -03 990 # 991 # Alagoas (AL), Sergipe (SE) 992 Zone America/Maceio -2:22:52 - LMT 1914 993 -3:00 Brazil -03/-02 1990 Sep 17 994 -3:00 - -03 1995 Oct 13 995 -3:00 Brazil -03/-02 1996 Sep 4 996 -3:00 - -03 1999 Sep 30 997 -3:00 Brazil -03/-02 2000 Oct 22 998 -3:00 - -03 2001 Sep 13 999 -3:00 Brazil -03/-02 2002 Oct 1 1000 -3:00 - -03 1001 # 1002 # Bahia (BA) 1003 # There are too many Salvadors elsewhere, so use America/Bahia instead 1004 # of America/Salvador. 1005 Zone America/Bahia -2:34:04 - LMT 1914 1006 -3:00 Brazil -03/-02 2003 Sep 24 1007 -3:00 - -03 2011 Oct 16 1008 -3:00 Brazil -03/-02 2012 Oct 21 1009 -3:00 - -03 1010 # 1011 # Gois (GO), Distrito Federal (DF), Minas Gerais (MG), 1012 # Esprito Santo (ES), Rio de Janeiro (RJ), So Paulo (SP), Paran (PR), 1013 # Santa Catarina (SC), Rio Grande do Sul (RS) 1014 Zone America/Sao_Paulo -3:06:28 - LMT 1914 1015 -3:00 Brazil -03/-02 1963 Oct 23 0:00 1016 -3:00 1:00 -02 1964 1017 -3:00 Brazil -03/-02 1018 # 1019 # Mato Grosso do Sul (MS) 1020 Zone America/Campo_Grande -3:38:28 - LMT 1914 1021 -4:00 Brazil -04/-03 1022 # 1023 # Mato Grosso (MT) 1024 Zone America/Cuiaba -3:44:20 - LMT 1914 1025 -4:00 Brazil -04/-03 2003 Sep 24 1026 -4:00 - -04 2004 Oct 1 1027 -4:00 Brazil -04/-03 1028 # 1029 # Rondnia (RO) 1030 Zone America/Porto_Velho -4:15:36 - LMT 1914 1031 -4:00 Brazil -04/-03 1988 Sep 12 1032 -4:00 - -04 1033 # 1034 # Roraima (RR) 1035 Zone America/Boa_Vista -4:02:40 - LMT 1914 1036 -4:00 Brazil -04/-03 1988 Sep 12 1037 -4:00 - -04 1999 Sep 30 1038 -4:00 Brazil -04/-03 2000 Oct 15 1039 -4:00 - -04 1040 # 1041 # east Amazonas (AM): Boca do Acre, Juta, Manaus, Floriano Peixoto 1042 # The great circle line from Tabatinga to Porto Acre divides 1043 # east from west Amazonas. 1044 Zone America/Manaus -4:00:04 - LMT 1914 1045 -4:00 Brazil -04/-03 1988 Sep 12 1046 -4:00 - -04 1993 Sep 28 1047 -4:00 Brazil -04/-03 1994 Sep 22 1048 -4:00 - -04 1049 # 1050 # west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant, 1051 # Eirunep, Envira, Ipixuna 1052 Zone America/Eirunepe -4:39:28 - LMT 1914 1053 -5:00 Brazil -05/-04 1988 Sep 12 1054 -5:00 - -05 1993 Sep 28 1055 -5:00 Brazil -05/-04 1994 Sep 22 1056 -5:00 - -05 2008 Jun 24 0:00 1057 -4:00 - -04 2013 Nov 10 1058 -5:00 - -05 1059 # 1060 # Acre (AC) 1061 Zone America/Rio_Branco -4:31:12 - LMT 1914 1062 -5:00 Brazil -05/-04 1988 Sep 12 1063 -5:00 - -05 2008 Jun 24 0:00 1064 -4:00 - -04 2013 Nov 10 1065 -5:00 - -05 1066 1067 # Chile 1068 1069 # From Paul Eggert (2015-04-03): 1070 # Shanks & Pottenger says America/Santiago introduced standard time in 1071 # 1890 and rounds its UTC offset to 70W40; guess that in practice this 1072 # was the same offset as in 1916-1919. It also says Pacific/Easter 1073 # standardized on 109W22 in 1890; assume this didn't change the clocks. 1074 # 1075 # Dates for America/Santiago from 1910 to 2004 are primarily from 1076 # the following source, cited by Oscar van Vlijmen (2006-10-08): 1077 # [1] Chile Law 1078 # http://www.webexhibits.org/daylightsaving/chile.html 1079 # This contains a copy of this official table: 1080 # Cambios en la hora oficial de Chile desde 1900 (retrieved 2008-03-30) 1081 # https://web.archive.org/web/20080330200901/http://www.horaoficial.cl/cambio.htm 1082 # [1] needs several corrections, though. 1083 # 1084 # The first set of corrections is from: 1085 # [2] History of the Official Time of Chile 1086 # http://www.horaoficial.cl/ing/horaof_ing.html (retrieved 2012-03-06). See: 1087 # https://web.archive.org/web/20120306042032/http://www.horaoficial.cl/ing/horaof_ing.html 1088 # This is an English translation of: 1089 # Historia de la hora oficial de Chile (retrieved 2012-10-24). See: 1090 # https://web.archive.org/web/20121024234627/http://www.horaoficial.cl/horaof.htm 1091 # A fancier Spanish version (requiring mouse-clicking) is at: 1092 # http://www.horaoficial.cl/historia_hora.html 1093 # Conflicts between [1] and [2] were resolved as follows: 1094 # 1095 # - [1] says the 1910 transition was Jan 1, [2] says Jan 10 and cites 1096 # Boletn No. 1, Aviso No. 1 (1910). Go with [2]. 1097 # 1098 # - [1] says SMT was -4:42:45, [2] says Chile's official time from 1099 # 1916 to 1919 was -4:42:46.3, the meridian of Chile's National 1100 # Astronomical Observatory (OAN), then located in what is now 1101 # Quinta Normal in Santiago. Go with [2], rounding it to -4:42:46. 1102 # 1103 # - [1] says the 1918 transition was Sep 1, [2] says Sep 10 and cites 1104 # Boletn No. 22, Aviso No. 129/1918 (1918-08-23). Go with [2]. 1105 # 1106 # - [1] does not give times for transitions; assume they occur 1107 # at midnight mainland time, the current common practice. However, 1108 # go with [2]'s specification of 23:00 for the 1947-05-21 transition. 1109 # 1110 # Another correction to [1] is from Jesper Nrgaard Welen, who 1111 # wrote (2006-10-08), "I think that there are some obvious mistakes in 1112 # the suggested link from Oscar van Vlijmen,... for instance entry 66 1113 # says that GMT-4 ended 1990-09-12 while entry 67 only begins GMT-3 at 1114 # 1990-09-15 (they should have been 1990-09-15 and 1990-09-16 1115 # respectively), but anyhow it clears up some doubts too." 1116 # 1117 # Data for Pacific/Easter from 1910 through 1967 come from Shanks & 1118 # Pottenger. After that, for lack of better info assume 1119 # Pacific/Easter is always two hours behind America/Santiago; 1120 # this is known to work for DST transitions starting in 2008 and 1121 # may well be true for earlier transitions. 1122 1123 # From Eduardo Krell (1995-10-19): 1124 # The law says to switch to DST at midnight [24:00] on the second SATURDAY 1125 # of October.... The law is the same for March and October. 1126 # (1998-09-29): 1127 # Because of the drought this year, the government decided to go into 1128 # DST earlier (saturday 9/26 at 24:00). This is a one-time change only ... 1129 # (unless there's another dry season next year, I guess). 1130 1131 # From Julio I. Pacheco Troncoso (1999-03-18): 1132 # Because of the same drought, the government decided to end DST later, 1133 # on April 3, (one-time change). 1134 1135 # From Germn Poo-Caamao (2008-03-03): 1136 # Due to drought, Chile extends Daylight Time in three weeks. This 1137 # is one-time change (Saturday 3/29 at 24:00 for America/Santiago 1138 # and Saturday 3/29 at 22:00 for Pacific/Easter) 1139 # The Supreme Decree is located at 1140 # http://www.shoa.cl/servicios/supremo316.pdf 1141 # 1142 # From Jos Miguel Garrido (2008-03-05): 1143 # http://www.shoa.cl/noticias/2008/04hora/hora.htm 1144 1145 # From Angel Chiang (2010-03-04): 1146 # Subject: DST in Chile exceptionally extended to 3 April due to earthquake 1147 # http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098 1148 # 1149 # From Arthur David Olson (2010-03-06): 1150 # Angel Chiang's message confirmed by Julio Pacheco; Julio provided a patch. 1151 1152 # From Glenn Eychaner (2011-03-28): 1153 # http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E} 1154 # In English: 1155 # Chile's clocks will go back an hour this year on the 7th of May instead 1156 # of this Saturday. They will go forward again the 3rd Saturday in 1157 # August, not in October as they have since 1968. 1158 1159 # From Mauricio Parada (2012-02-22), translated by Glenn Eychaner (2012-02-23): 1160 # As stated in the website of the Chilean Energy Ministry 1161 # http://www.minenergia.cl/ministerio/noticias/generales/gobierno-anuncia-fechas-de-cambio-de.html 1162 # The Chilean Government has decided to postpone the entrance into winter time 1163 # (to leave DST) from March 11 2012 to April 28th 2012.... 1164 # Quote from the website communication: 1165 # 1166 # 6. For the year 2012, the dates of entry into winter time will be as follows: 1167 # a. Saturday April 28, 2012, clocks should go back 60 minutes; that is, at 1168 # 23:59:59, instead of passing to 0:00, the time should be adjusted to be 23:00 1169 # of the same day. 1170 # b. Saturday, September 1, 2012, clocks should go forward 60 minutes; that is, 1171 # at 23:59:59, instead of passing to 0:00, the time should be adjusted to be 1172 # 01:00 on September 2. 1173 1174 # From Steffen Thorsen (2013-02-15): 1175 # According to several news sources, Chile has extended DST this year, 1176 # they will end DST later and start DST earlier than planned. They 1177 # hope to save energy. The new end date is 2013-04-28 00:00 and new 1178 # start date is 2013-09-08 00:00.... 1179 # http://www.gob.cl/informa/2013/02/15/gobierno-anuncia-fechas-de-cambio-de-hora-para-el-ano-2013.htm 1180 1181 # From Jos Miguel Garrido (2014-02-19): 1182 # Today appeared in the Diario Oficial a decree amending the time change 1183 # dates to 2014. 1184 # DST End: last Saturday of April 2014 (Sun 27 Apr 2014 03:00 UTC) 1185 # DST Start: first Saturday of September 2014 (Sun 07 Sep 2014 04:00 UTC) 1186 # http://www.diariooficial.interior.gob.cl//media/2014/02/19/do-20140219.pdf 1187 1188 # From Eduardo Romero Urra (2015-03-03): 1189 # Today has been published officially that Chile will use the DST time 1190 # permanently until March 25 of 2017 1191 # http://www.diariooficial.interior.gob.cl/media/2015/03/03/1-large.jpg 1192 # 1193 # From Paul Eggert (2015-03-03): 1194 # For now, assume that the extension will persist indefinitely. 1195 1196 # From Juan Correa (2016-03-18): 1197 # The decree regarding DST has been published in today's Official Gazette: 1198 # http://www.diariooficial.interior.gob.cl/versiones-anteriores/do/20160318/ 1199 # http://www.leychile.cl/Navegar?idNorma=1088502 1200 # It does consider the second Saturday of May and August as the dates 1201 # for the transition; and it lists DST dates until 2019, but I think 1202 # this scheme will stick. 1203 # 1204 # From Paul Eggert (2016-03-18): 1205 # For now, assume the pattern holds for the indefinite future. 1206 # The decree says transitions occur at 24:00; in practice this appears 1207 # to mean 24:00 mainland time, not 24:00 local time, so that Easter 1208 # Island is always two hours behind the mainland. 1209 1210 # From Juan Correa (2016-12-04): 1211 # Magallanes region ... will keep DST (UTC -3) all year round.... 1212 # 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 1213 # 1214 # From Deborah Goldsmith (2017-01-19): 1215 # http://www.diariooficial.interior.gob.cl/publicaciones/2017/01/17/41660/01/1169626.pdf 1216 # From Paul Eggert (2017-01-19): 1217 # The above says the Magallanes change expires 2019-05-11 at 24:00, 1218 # so in theory, they will revert to -04/-03 after that, which means 1219 # they will switch from -03 to -04 one hour after Santiago does that day. 1220 # For now, assume that they will not revert. 1221 1222 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1223 Rule Chile 1927 1931 - Sep 1 0:00 1:00 S 1224 Rule Chile 1928 1932 - Apr 1 0:00 0 - 1225 Rule Chile 1968 only - Nov 3 4:00u 1:00 S 1226 Rule Chile 1969 only - Mar 30 3:00u 0 - 1227 Rule Chile 1969 only - Nov 23 4:00u 1:00 S 1228 Rule Chile 1970 only - Mar 29 3:00u 0 - 1229 Rule Chile 1971 only - Mar 14 3:00u 0 - 1230 Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S 1231 Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 - 1232 Rule Chile 1973 only - Sep 30 4:00u 1:00 S 1233 Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S 1234 Rule Chile 1987 only - Apr 12 3:00u 0 - 1235 Rule Chile 1988 1990 - Mar Sun>=9 3:00u 0 - 1236 Rule Chile 1988 1989 - Oct Sun>=9 4:00u 1:00 S 1237 Rule Chile 1990 only - Sep 16 4:00u 1:00 S 1238 Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 - 1239 Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S 1240 Rule Chile 1997 only - Mar 30 3:00u 0 - 1241 Rule Chile 1998 only - Mar Sun>=9 3:00u 0 - 1242 Rule Chile 1998 only - Sep 27 4:00u 1:00 S 1243 Rule Chile 1999 only - Apr 4 3:00u 0 - 1244 Rule Chile 1999 2010 - Oct Sun>=9 4:00u 1:00 S 1245 Rule Chile 2000 2007 - Mar Sun>=9 3:00u 0 - 1246 # N.B.: the end of March 29 in Chile is March 30 in Universal time, 1247 # which is used below in specifying the transition. 1248 Rule Chile 2008 only - Mar 30 3:00u 0 - 1249 Rule Chile 2009 only - Mar Sun>=9 3:00u 0 - 1250 Rule Chile 2010 only - Apr Sun>=1 3:00u 0 - 1251 Rule Chile 2011 only - May Sun>=2 3:00u 0 - 1252 Rule Chile 2011 only - Aug Sun>=16 4:00u 1:00 S 1253 Rule Chile 2012 2014 - Apr Sun>=23 3:00u 0 - 1254 Rule Chile 2012 2014 - Sep Sun>=2 4:00u 1:00 S 1255 Rule Chile 2016 max - May Sun>=9 3:00u 0 - 1256 Rule Chile 2016 max - Aug Sun>=9 4:00u 1:00 S 1257 # IATA SSIM anomalies: (1992-02) says 1992-03-14; 1258 # (1996-09) says 1998-03-08. Ignore these. 1259 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1260 Zone America/Santiago -4:42:46 - LMT 1890 1261 -4:42:46 - SMT 1910 Jan 10 # Santiago Mean Time 1262 -5:00 - -05 1916 Jul 1 1263 -4:42:46 - SMT 1918 Sep 10 1264 -4:00 - -04 1919 Jul 1 1265 -4:42:46 - SMT 1927 Sep 1 1266 -5:00 Chile -05/-04 1932 Sep 1 1267 -4:00 - -04 1942 Jun 1 1268 -5:00 - -05 1942 Aug 1 1269 -4:00 - -04 1946 Jul 15 1270 -4:00 1:00 -03 1946 Sep 1 # central Chile 1271 -4:00 - -04 1947 Apr 1 1272 -5:00 - -05 1947 May 21 23:00 1273 -4:00 Chile -04/-03 1274 Zone America/Punta_Arenas -4:43:40 - LMT 1890 1275 -4:42:46 - SMT 1910 Jan 10 1276 -5:00 - -05 1916 Jul 1 1277 -4:42:46 - SMT 1918 Sep 10 1278 -4:00 - -04 1919 Jul 1 1279 -4:42:46 - SMT 1927 Sep 1 1280 -5:00 Chile -05/-04 1932 Sep 1 1281 -4:00 - -04 1942 Jun 1 1282 -5:00 - -05 1942 Aug 1 1283 -4:00 - -04 1947 Apr 1 1284 -5:00 - -05 1947 May 21 23:00 1285 -4:00 Chile -04/-03 2016 Dec 4 1286 -3:00 - -03 1287 Zone Pacific/Easter -7:17:28 - LMT 1890 1288 -7:17:28 - EMT 1932 Sep # Easter Mean Time 1289 -7:00 Chile -07/-06 1982 Mar 14 3:00u # Easter Time 1290 -6:00 Chile -06/-05 1291 # 1292 # Salas y Gmez Island is uninhabited. 1293 # Other Chilean locations, including Juan Fernndez Is, Desventuradas Is, 1294 # and Antarctic bases, are like America/Santiago. 1295 1296 # Antarctic base using South American rules 1297 # (See the file 'antarctica' for more.) 1298 # 1299 # Palmer, Anvers Island, since 1965 (moved 2 miles in 1968) 1300 # 1301 # From Ethan Dicks (1996-10-06): 1302 # It keeps the same time as Punta Arenas, Chile, because, just like us 1303 # and the South Pole, that's the other end of their supply line.... 1304 # I verified with someone who was there that since 1980, 1305 # Palmer has followed Chile. Prior to that, before the Falklands War, 1306 # Palmer used to be supplied from Argentina. 1307 # 1308 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1309 Zone Antarctica/Palmer 0 - -00 1965 1310 -4:00 Arg -04/-03 1969 Oct 5 1311 -3:00 Arg -03/-02 1982 May 1312 -4:00 Chile -04/-03 2016 Dec 4 1313 -3:00 - -03 1314 1315 # Colombia 1316 1317 # Milne gives 4:56:16.4 for Bogot time in 1899; round to nearest. He writes, 1318 # "A variation of fifteen minutes in the public clocks of Bogota is not rare." 1319 1320 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1321 Rule CO 1992 only - May 3 0:00 1:00 S 1322 Rule CO 1993 only - Apr 4 0:00 0 - 1323 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1324 Zone America/Bogota -4:56:16 - LMT 1884 Mar 13 1325 -4:56:16 - BMT 1914 Nov 23 # Bogot Mean Time 1326 -5:00 CO -05/-04 1327 # Malpelo, Providencia, San Andres 1328 # no information; probably like America/Bogota 1329 1330 # Curaao 1331 1332 # Milne gives 4:35:46.9 for Curaao mean time; round to nearest. 1333 # 1334 # From Paul Eggert (2006-03-22): 1335 # Shanks & Pottenger say that The Bottom and Philipsburg have been at 1336 # -4:00 since standard time was introduced on 1912-03-02; and that 1337 # Kralendijk and Rincon used Kralendijk Mean Time (-4:33:08) from 1338 # 1912-02-02 to 1965-01-01. The former is dubious, since S&P also say 1339 # Saba Island has been like Curaao. 1340 # This all predates our 1970 cutoff, though. 1341 # 1342 # By July 2007 Curaao and St Maarten are planned to become 1343 # associated states within the Netherlands, much like Aruba; 1344 # Bonaire, Saba and St Eustatius would become directly part of the 1345 # Netherlands as Kingdom Islands. This won't affect their time zones 1346 # though, as far as we know. 1347 # 1348 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1349 Zone America/Curacao -4:35:47 - LMT 1912 Feb 12 # Willemstad 1350 -4:30 - -0430 1965 1351 -4:00 - AST 1352 1353 # From Arthur David Olson (2011-06-15): 1354 # use links for places with new iso3166 codes. 1355 # The name "Lower Prince's Quarter" is both longer than fourteen characters 1356 # and contains an apostrophe; use "Lower_Princes" below. 1357 1358 Link America/Curacao America/Lower_Princes # Sint Maarten 1359 Link America/Curacao America/Kralendijk # Caribbean Netherlands 1360 1361 # Ecuador 1362 # 1363 # Milne says the Central and South American Telegraph Company used -5:24:15. 1364 # 1365 # From Alois Treindl (2016-12-15): 1366 # https://www.elcomercio.com/actualidad/hora-sixto-1993.html 1367 # ... Whether the law applied also to Galpagos, I do not know. 1368 # From Paul Eggert (2016-12-15): 1369 # https://www.elcomercio.com/afull/modificacion-husohorario-ecuador-presidentes-decreto.html 1370 # This says President Sixto Durn Balln signed decree No. 285, which 1371 # established DST from 1992-11-28 to 1993-02-05; it does not give transition 1372 # times. The people called it "hora de Sixto" ("Sixto hour"). The change did 1373 # not go over well; a popular song "Qu hora es" by Jaime Guevara had lyrics 1374 # that included "Amaneca en mitad de la noche, los guaguas iban a clase sin 1375 # sol" ("It was dawning in the middle of the night, the buses went to class 1376 # without sun"). Although Balln's campaign slogan was "Ni un paso atrs" 1377 # (Not one step back), the clocks went back in 1993 and the experiment was not 1378 # repeated. For now, assume transitions were at 00:00 local time country-wide. 1379 # 1380 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1381 Rule Ecuador 1992 only - Nov 28 0:00 1:00 S 1382 Rule Ecuador 1993 only - Feb 5 0:00 0 - 1383 # 1384 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1385 Zone America/Guayaquil -5:19:20 - LMT 1890 1386 -5:14:00 - QMT 1931 # Quito Mean Time 1387 -5:00 Ecuador -05/-04 1388 Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno 1389 -5:00 - -05 1986 1390 -6:00 Ecuador -06/-05 1391 1392 # Falklands 1393 1394 # From Paul Eggert (2006-03-22): 1395 # Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except 1396 # the IATA gives 1996-09-08. Go with Shanks & Pottenger. 1397 1398 # From Falkland Islands Government Office, London (2001-01-22) 1399 # via Jesper Nrgaard: 1400 # ... the clocks revert back to Local Mean Time at 2 am on Sunday 15 1401 # April 2001 and advance one hour to summer time at 2 am on Sunday 2 1402 # September. It is anticipated that the clocks will revert back at 2 1403 # am on Sunday 21 April 2002 and advance to summer time at 2 am on 1404 # Sunday 1 September. 1405 1406 # From Rives McDow (2001-02-13): 1407 # 1408 # I have communicated several times with people there, and the last 1409 # time I had communications that was helpful was in 1998. Here is 1410 # what was said then: 1411 # 1412 # "The general rule was that Stanley used daylight saving and the Camp 1413 # did not. However for various reasons many people in the Camp have 1414 # started to use daylight saving (known locally as 'Stanley Time') 1415 # There is no rule as to who uses daylight saving - it is a matter of 1416 # personal choice and so it is impossible to draw a map showing who 1417 # uses it and who does not. Any list would be out of date as soon as 1418 # it was produced. This year daylight saving ended on April 18/19th 1419 # and started again on September 12/13th. I do not know what the rule 1420 # is, but can find out if you like. We do not change at the same time 1421 # as UK or Chile." 1422 # 1423 # I did have in my notes that the rule was "Second Saturday in Sep at 1424 # 0:00 until third Saturday in Apr at 0:00". I think that this does 1425 # not agree in some cases with Shanks; is this true? 1426 # 1427 # Also, there is no mention in the list that some areas in the 1428 # Falklands do not use DST. I have found in my communications there 1429 # that these areas are on the western half of East Falkland and all of 1430 # West Falkland. Stanley is the only place that consistently observes 1431 # DST. Again, as in other places in the world, the farmers don't like 1432 # it. West Falkland is almost entirely sheep farmers. 1433 # 1434 # I know one lady there that keeps a list of which farm keeps DST and 1435 # which doesn't each year. She runs a shop in Stanley, and says that 1436 # the list changes each year. She uses it to communicate to her 1437 # customers, catching them when they are home for lunch or dinner. 1438 1439 # From Paul Eggert (2001-03-05): 1440 # For now, we'll just record the time in Stanley, since we have no 1441 # better info. 1442 1443 # From Steffen Thorsen (2011-04-01): 1444 # The Falkland Islands will not turn back clocks this winter, but stay on 1445 # daylight saving time. 1446 # 1447 # One source: 1448 # http://www.falklandnews.com/public/story.cfm?get=5914&source=3 1449 # 1450 # We have gotten this confirmed by a clerk of the legislative assembly: 1451 # Normally the clocks revert to Local Mean Time (UTC/GMT -4 hours) on the 1452 # third Sunday of April at 0200hrs and advance to Summer Time (UTC/GMT -3 1453 # hours) on the first Sunday of September at 0200hrs. 1454 # 1455 # IMPORTANT NOTE: During 2011, on a trial basis, the Falkland Islands 1456 # will not revert to local mean time, but clocks will remain on Summer 1457 # time (UTC/GMT - 3 hours) throughout the whole of 2011. Any long term 1458 # change to local time following the trial period will be notified. 1459 # 1460 # From Andrew Newman (2012-02-24) 1461 # A letter from Justin McPhee, Chief Executive, 1462 # Cable & Wireless Falkland Islands (dated 2012-02-22) 1463 # states... 1464 # The current Atlantic/Stanley entry under South America expects the 1465 # clocks to go back to standard Falklands Time (FKT) on the 15th April. 1466 # The database entry states that in 2011 Stanley was staying on fixed 1467 # summer time on a trial basis only. FIG need to contact IANA and/or 1468 # the maintainers of the database to inform them we're adopting 1469 # the same policy this year and suggest recommendations for future years. 1470 # 1471 # For now we will assume permanent summer time for the Falklands 1472 # until advised differently (to apply for 2012 and beyond, after the 2011 1473 # experiment was apparently successful.) 1474 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1475 Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S 1476 Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 - 1477 Rule Falk 1939 only - Oct 1 0:00 1:00 S 1478 Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S 1479 Rule Falk 1943 only - Jan 1 0:00 0 - 1480 Rule Falk 1983 only - Sep lastSun 0:00 1:00 S 1481 Rule Falk 1984 1985 - Apr lastSun 0:00 0 - 1482 Rule Falk 1984 only - Sep 16 0:00 1:00 S 1483 Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S 1484 Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 - 1485 Rule Falk 2001 2010 - Apr Sun>=15 2:00 0 - 1486 Rule Falk 2001 2010 - Sep Sun>=1 2:00 1:00 S 1487 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1488 Zone Atlantic/Stanley -3:51:24 - LMT 1890 1489 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time 1490 -4:00 Falk -04/-03 1983 May 1491 -3:00 Falk -03/-02 1985 Sep 15 1492 -4:00 Falk -04/-03 2010 Sep 5 2:00 1493 -3:00 - -03 1494 1495 # French Guiana 1496 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1497 Zone America/Cayenne -3:29:20 - LMT 1911 Jul 1498 -4:00 - -04 1967 Oct 1499 -3:00 - -03 1500 1501 # Guyana 1502 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1503 Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown 1504 -3:45 - -0345 1975 Jul 31 1505 -3:00 - -03 1991 1506 # IATA SSIM (1996-06) says -4:00. Assume a 1991 switch. 1507 -4:00 - -04 1508 1509 # Paraguay 1510 # 1511 # From Paul Eggert (2006-03-22): 1512 # Shanks & Pottenger say that spring transitions are 01:00 -> 02:00, 1513 # and autumn transitions are 00:00 -> 23:00. Go with pre-1999 1514 # editions of Shanks, and with the IATA, who say transitions occur at 00:00. 1515 # 1516 # From Waldemar Villamayor-Venialbo (2013-09-20): 1517 # No time of the day is established for the adjustment, so people normally 1518 # adjust their clocks at 0 hour of the given dates. 1519 # 1520 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1521 Rule Para 1975 1988 - Oct 1 0:00 1:00 S 1522 Rule Para 1975 1978 - Mar 1 0:00 0 - 1523 Rule Para 1979 1991 - Apr 1 0:00 0 - 1524 Rule Para 1989 only - Oct 22 0:00 1:00 S 1525 Rule Para 1990 only - Oct 1 0:00 1:00 S 1526 Rule Para 1991 only - Oct 6 0:00 1:00 S 1527 Rule Para 1992 only - Mar 1 0:00 0 - 1528 Rule Para 1992 only - Oct 5 0:00 1:00 S 1529 Rule Para 1993 only - Mar 31 0:00 0 - 1530 Rule Para 1993 1995 - Oct 1 0:00 1:00 S 1531 Rule Para 1994 1995 - Feb lastSun 0:00 0 - 1532 Rule Para 1996 only - Mar 1 0:00 0 - 1533 # IATA SSIM (2000-02) says 1999-10-10; ignore this for now. 1534 # From Steffen Thorsen (2000-10-02): 1535 # I have three independent reports that Paraguay changed to DST this Sunday 1536 # (10-01). 1537 # 1538 # Translated by Gwillim Law (2001-02-27) from 1539 # Noticias, a daily paper in Asuncin, Paraguay (2000-10-01): 1540 # http://www.diarionoticias.com.py/011000/nacional/naciona1.htm 1541 # Starting at 0:00 today, the clock will be set forward 60 minutes, in 1542 # fulfillment of Decree No. 7,273 of the Executive Power.... The time change 1543 # system has been operating for several years. Formerly there was a separate 1544 # decree each year; the new law has the same effect, but permanently. Every 1545 # year, the time will change on the first Sunday of October; likewise, the 1546 # clock will be set back on the first Sunday of March. 1547 # 1548 Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S 1549 # IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger. 1550 Rule Para 1997 only - Feb lastSun 0:00 0 - 1551 # Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but 1552 # (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27). 1553 Rule Para 1998 2001 - Mar Sun>=1 0:00 0 - 1554 # From Rives McDow (2002-02-28): 1555 # A decree was issued in Paraguay (No. 16350) on 2002-02-26 that changed the 1556 # dst method to be from the first Sunday in September to the first Sunday in 1557 # April. 1558 Rule Para 2002 2004 - Apr Sun>=1 0:00 0 - 1559 Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S 1560 # 1561 # From Jesper Nrgaard Welen (2005-01-02): 1562 # There are several sources that claim that Paraguay made 1563 # a timezone rule change in autumn 2004. 1564 # From Steffen Thorsen (2005-01-05): 1565 # Decree 1,867 (2004-03-05) 1566 # From Carlos Ral Perasso via Jesper Nrgaard Welen (2006-10-13) 1567 # http://www.presidencia.gov.py/decretos/D1867.pdf 1568 Rule Para 2004 2009 - Oct Sun>=15 0:00 1:00 S 1569 Rule Para 2005 2009 - Mar Sun>=8 0:00 0 - 1570 # From Carlos Ral Perasso (2010-02-18): 1571 # By decree number 3958 issued yesterday 1572 # http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf 1573 # Paraguay changes its DST schedule, postponing the March rule to April and 1574 # modifying the October date. The decree reads: 1575 # ... 1576 # Art. 1. It is hereby established that from the second Sunday of the month of 1577 # April of this year (2010), the official time is to be set back 60 minutes, 1578 # and that on the first Sunday of the month of October, it is to be set 1579 # forward 60 minutes, in all the territory of the Paraguayan Republic. 1580 # ... 1581 Rule Para 2010 max - Oct Sun>=1 0:00 1:00 S 1582 Rule Para 2010 2012 - Apr Sun>=8 0:00 0 - 1583 # 1584 # From Steffen Thorsen (2013-03-07): 1585 # Paraguay will end DST on 2013-03-24 00:00.... 1586 # http://www.ande.gov.py/interna.php?id=1075 1587 # 1588 # From Carlos Ral Perasso (2013-03-15): 1589 # The change in Paraguay is now final. Decree number 10780 1590 # http://www.presidencia.gov.py/uploads/pdf/presidencia-3b86ff4b691c79d4f5927ca964922ec74772ce857c02ca054a52a37b49afc7fb.pdf 1591 # From Carlos Ral Perasso (2014-02-28): 1592 # Decree 1264 can be found at: 1593 # http://www.presidencia.gov.py/archivos/documentos/DECRETO1264_ey9r8zai.pdf 1594 Rule Para 2013 max - Mar Sun>=22 0:00 0 - 1595 1596 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1597 Zone America/Asuncion -3:50:40 - LMT 1890 1598 -3:50:40 - AMT 1931 Oct 10 # Asuncin Mean Time 1599 -4:00 - -04 1972 Oct 1600 -3:00 - -03 1974 Apr 1601 -4:00 Para -04/-03 1602 1603 # Peru 1604 # 1605 # From Evelyn C. Leeper via Mark Brader (2003-10-26) 1606 # <news:xrGmb.39935$gA1.13896113 (a] news4.srv.hcvlny.cv.net>: 1607 # When we were in Peru in 1985-1986, they apparently switched over 1608 # sometime between December 29 and January 3 while we were on the Amazon. 1609 # 1610 # From Paul Eggert (2006-03-22): 1611 # Shanks & Pottenger don't have this transition. Assume 1986 was like 1987. 1612 1613 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1614 Rule Peru 1938 only - Jan 1 0:00 1:00 S 1615 Rule Peru 1938 only - Apr 1 0:00 0 - 1616 Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S 1617 Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 - 1618 Rule Peru 1986 1987 - Jan 1 0:00 1:00 S 1619 Rule Peru 1986 1987 - Apr 1 0:00 0 - 1620 Rule Peru 1990 only - Jan 1 0:00 1:00 S 1621 Rule Peru 1990 only - Apr 1 0:00 0 - 1622 # IATA is ambiguous for 1993/1995; go with Shanks & Pottenger. 1623 Rule Peru 1994 only - Jan 1 0:00 1:00 S 1624 Rule Peru 1994 only - Apr 1 0:00 0 - 1625 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1626 Zone America/Lima -5:08:12 - LMT 1890 1627 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time? 1628 -5:00 Peru -05/-04 1629 1630 # South Georgia 1631 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1632 Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken 1633 -2:00 - -02 1634 1635 # South Sandwich Is 1636 # uninhabited; scientific personnel have wintered 1637 1638 # Suriname 1639 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1640 Zone America/Paramaribo -3:40:40 - LMT 1911 1641 -3:40:52 - PMT 1935 # Paramaribo Mean Time 1642 -3:40:36 - PMT 1945 Oct # The capital moved? 1643 -3:30 - -0330 1984 Oct 1644 -3:00 - -03 1645 1646 # Trinidad and Tobago 1647 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1648 Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2 1649 -4:00 - AST 1650 1651 # These all agree with Trinidad and Tobago since 1970. 1652 Link America/Port_of_Spain America/Anguilla 1653 Link America/Port_of_Spain America/Antigua 1654 Link America/Port_of_Spain America/Dominica 1655 Link America/Port_of_Spain America/Grenada 1656 Link America/Port_of_Spain America/Guadeloupe 1657 Link America/Port_of_Spain America/Marigot # St Martin (French part) 1658 Link America/Port_of_Spain America/Montserrat 1659 Link America/Port_of_Spain America/St_Barthelemy # St Barthlemy 1660 Link America/Port_of_Spain America/St_Kitts # St Kitts & Nevis 1661 Link America/Port_of_Spain America/St_Lucia 1662 Link America/Port_of_Spain America/St_Thomas # Virgin Islands (US) 1663 Link America/Port_of_Spain America/St_Vincent 1664 Link America/Port_of_Spain America/Tortola # Virgin Islands (UK) 1665 1666 # Uruguay 1667 # From Paul Eggert (1993-11-18): 1668 # Uruguay wins the prize for the strangest peacetime manipulation of the rules. 1669 # From Shanks & Pottenger: 1670 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1671 # Whitman gives 1923 Oct 1; go with Shanks & Pottenger. 1672 Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS 1673 Rule Uruguay 1924 1926 - Apr 1 0:00 0 - 1674 Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS 1675 Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS 1676 # Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman. 1677 Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 - 1678 Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS 1679 Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 - 1680 # Whitman gives 1937 Oct 3; go with Shanks & Pottenger. 1681 Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS 1682 # Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13, 1683 # and 1943 Apr 13 "to present time"; go with Shanks & Pottenger. 1684 Rule Uruguay 1941 only - Aug 1 0:00 0:30 HS 1685 Rule Uruguay 1942 only - Jan 1 0:00 0 - 1686 Rule Uruguay 1942 only - Dec 14 0:00 1:00 S 1687 Rule Uruguay 1943 only - Mar 14 0:00 0 - 1688 Rule Uruguay 1959 only - May 24 0:00 1:00 S 1689 Rule Uruguay 1959 only - Nov 15 0:00 0 - 1690 Rule Uruguay 1960 only - Jan 17 0:00 1:00 S 1691 Rule Uruguay 1960 only - Mar 6 0:00 0 - 1692 Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S 1693 Rule Uruguay 1965 only - Sep 26 0:00 0 - 1694 Rule Uruguay 1966 1967 - Oct 31 0:00 0 - 1695 Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS 1696 Rule Uruguay 1968 1970 - Dec 2 0:00 0 - 1697 Rule Uruguay 1972 only - Apr 24 0:00 1:00 S 1698 Rule Uruguay 1972 only - Aug 15 0:00 0 - 1699 Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS 1700 Rule Uruguay 1974 only - Dec 22 0:00 1:00 S 1701 Rule Uruguay 1976 only - Oct 1 0:00 0 - 1702 Rule Uruguay 1977 only - Dec 4 0:00 1:00 S 1703 Rule Uruguay 1978 only - Apr 1 0:00 0 - 1704 Rule Uruguay 1979 only - Oct 1 0:00 1:00 S 1705 Rule Uruguay 1980 only - May 1 0:00 0 - 1706 Rule Uruguay 1987 only - Dec 14 0:00 1:00 S 1707 Rule Uruguay 1988 only - Mar 14 0:00 0 - 1708 Rule Uruguay 1988 only - Dec 11 0:00 1:00 S 1709 Rule Uruguay 1989 only - Mar 12 0:00 0 - 1710 Rule Uruguay 1989 only - Oct 29 0:00 1:00 S 1711 # Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2, 1712 # and that 1992/3's DST was from 10-25 to 03-01. Go with IATA. 1713 Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 - 1714 Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S 1715 Rule Uruguay 1992 only - Oct 18 0:00 1:00 S 1716 Rule Uruguay 1993 only - Feb 28 0:00 0 - 1717 # From Eduardo Cota (2004-09-20): 1718 # The Uruguayan government has decreed a change in the local time.... 1719 # http://www.presidencia.gub.uy/decretos/2004091502.htm 1720 Rule Uruguay 2004 only - Sep 19 0:00 1:00 S 1721 # From Steffen Thorsen (2005-03-11): 1722 # Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to 1723 # save energy ... it was postponed two weeks.... 1724 # http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm 1725 Rule Uruguay 2005 only - Mar 27 2:00 0 - 1726 # From Eduardo Cota (2005-09-27): 1727 # http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF 1728 # This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at 1729 # 02:00 local time, official time in Uruguay will be at GMT -2. 1730 Rule Uruguay 2005 only - Oct 9 2:00 1:00 S 1731 Rule Uruguay 2006 only - Mar 12 2:00 0 - 1732 # From Jesper Nrgaard Welen (2006-09-06): 1733 # http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF 1734 # 1735 # From Steffen Thorsen (2015-06-30): 1736 # ... it looks like they will not be using DST the coming summer: 1737 # http://www.elobservador.com.uy/gobierno-resolvio-que-no-habra-cambio-horario-verano-n656787 1738 # http://www.republica.com.uy/este-ano-no-se-modificara-el-huso-horario-en-uruguay/523760/ 1739 # From Paul Eggert (2015-06-30): 1740 # Apparently restaurateurs complained that DST caused people to go to the beach 1741 # instead of out to dinner. 1742 # From Pablo Camargo (2015-07-13): 1743 # http://archivo.presidencia.gub.uy/sci/decretos/2015/06/cons_min_201.pdf 1744 # [dated 2015-06-29; repeals Decree 311/006 dated 2006-09-04] 1745 Rule Uruguay 2006 2014 - Oct Sun>=1 2:00 1:00 S 1746 Rule Uruguay 2007 2015 - Mar Sun>=8 2:00 0 - 1747 1748 # This Zone can be simplified once we assume zic %z. 1749 Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28 1750 -3:44:44 - MMT 1920 May 1 # Montevideo MT 1751 -3:30 Uruguay -0330/-03 1942 Dec 14 1752 -3:00 Uruguay -03/-02 1968 1753 -3:00 Uruguay -03/-0230 1971 1754 -3:00 Uruguay -03/-02 1974 1755 -3:00 Uruguay -03/-0230 1974 Dec 22 1756 -3:00 Uruguay -03/-02 1757 1758 # Venezuela 1759 # 1760 # From Paul Eggert (2015-07-28): 1761 # For the 1965 transition see Gaceta Oficial No. 27.619 (1964-12-15), p 205.533 1762 # http://www.pgr.gob.ve/dmdocuments/1964/27619.pdf 1763 # 1764 # From John Stainforth (2007-11-28): 1765 # ... the change for Venezuela originally expected for 2007-12-31 has 1766 # been brought forward to 2007-12-09. The official announcement was 1767 # published today in the "Gaceta Oficial de la Repblica Bolivariana 1768 # de Venezuela, nmero 38.819" (official document for all laws or 1769 # resolution publication) 1770 # http://www.globovision.com/news.php?nid=72208 1771 1772 # From Alexander Krivenyshev (2016-04-15): 1773 # https://actualidad.rt.com/actualidad/204758-venezuela-modificar-huso-horario-sequia-elnino 1774 # 1775 # From Paul Eggert (2016-04-15): 1776 # Clocks advance 30 minutes on 2016-05-01 at 02:30.... 1777 # "'Venezuela's new time-zone: hours without light, hours without water, 1778 # hours of presidential broadcasts, hours of lines,' quipped comedian 1779 # Jean Mary Curr ...". See: Cawthorne A, Kai D. Venezuela scraps 1780 # half-hour time difference set by Chavez. Reuters 2016-04-15 14:50 -0400 1781 # https://www.reuters.com/article/us-venezuela-timezone-idUSKCN0XC2BE 1782 # 1783 # From Matt Johnson (2016-04-20): 1784 # ... published in the official Gazette [2016-04-18], here: 1785 # http://historico.tsj.gob.ve/gaceta_ext/abril/1842016/E-1842016-4551.pdf 1786 1787 # Zone NAME GMTOFF RULES FORMAT [UNTIL] 1788 Zone America/Caracas -4:27:44 - LMT 1890 1789 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time? 1790 -4:30 - -0430 1965 Jan 1 0:00 1791 -4:00 - -04 2007 Dec 9 3:00 1792 -4:30 - -0430 2016 May 1 2:30 1793 -4:00 - -04 1794
Indexes created Mon May 04 00:23:20 UTC 2026