1 # tzdb data for South America and environs 2 3 # This file is in the public domain, so clarified as of 4 # 2009-05-17 by Arthur David Olson. 5 6 # This file is by no means authoritative; if you think you know better, 7 # go ahead and edit the file, and please send any changes to 8 # the public mailing list tz (a] iana.org for general use in the future. 9 # For more, please see the file CONTRIBUTING in the tz distribution. 10 11 # From Paul Eggert (2016-12-05): 12 # 13 # Unless otherwise specified, the source for data through 1990 is: 14 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 15 # San Diego: ACS Publications, Inc. (2003). 16 # Unfortunately this book contains many errors and cites no sources. 17 # 18 # Many years ago Gwillim Law wrote that a good source 19 # for time zone data was the International Air Transport 20 # Association's Standard Schedules Information Manual (IATA SSIM), 21 # published semiannually. Law sent in several helpful summaries 22 # of the IATA's data after 1990. Except where otherwise noted, 23 # IATA SSIM is the source for entries after 1990. 24 # 25 # For data circa 1899, a common source is: 26 # Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94. 27 # https://www.jstor.org/stable/1774359 28 # 29 # These tables use numeric abbreviations like -03 and -0330 for 30 # integer hour and minute UT offsets. Although earlier editions used 31 # alphabetic time zone abbreviations, these abbreviations were 32 # invented and did not reflect common practice. 33 34 ############################################################################### 35 36 ############################################################################### 37 38 # Argentina 39 40 # From Bob Devine (1988-01-28): 41 # Argentina: first Sunday in October to first Sunday in April since 1976. 42 # Double Summer time from 1969 to 1974. Switches at midnight. 43 44 # From U. S. Naval Observatory (1988-01-19): 45 # ARGENTINA 3 H BEHIND UTC 46 47 # From Hernan G. Otero (1995-06-26): 48 # I am sending modifications to the Argentine time zone table... 49 # AR was chosen because they are the ISO letters that represent Argentina. 50 51 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S 52 Rule Arg 1930 only - Dec 1 0:00 1:00 - 53 Rule Arg 1931 only - Apr 1 0:00 0 - 54 Rule Arg 1931 only - Oct 15 0:00 1:00 - 55 Rule Arg 1932 1940 - Mar 1 0:00 0 - 56 Rule Arg 1932 1939 - Nov 1 0:00 1:00 - 57 Rule Arg 1940 only - Jul 1 0:00 1:00 - 58 Rule Arg 1941 only - Jun 15 0:00 0 - 59 Rule Arg 1941 only - Oct 15 0:00 1:00 - 60 Rule Arg 1943 only - Aug 1 0:00 0 - 61 Rule Arg 1943 only - Oct 15 0:00 1:00 - 62 Rule Arg 1946 only - Mar 1 0:00 0 - 63 Rule Arg 1946 only - Oct 1 0:00 1:00 - 64 Rule Arg 1963 only - Oct 1 0:00 0 - 65 Rule Arg 1963 only - Dec 15 0:00 1:00 - 66 Rule Arg 1964 1966 - Mar 1 0:00 0 - 67 Rule Arg 1964 1966 - Oct 15 0:00 1:00 - 68 Rule Arg 1967 only - Apr 2 0:00 0 - 69 Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 - 70 Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 - 71 Rule Arg 1974 only - Jan 23 0:00 1:00 - 72 Rule Arg 1974 only - May 1 0:00 0 - 73 Rule Arg 1988 only - Dec 1 0:00 1:00 - 74 # 75 # From Hernan G. Otero (1995-06-26): 76 # These corrections were contributed by InterSoft Argentina S.A., 77 # obtaining the data from the: 78 # Talleres de Hidrografa Naval Argentina 79 # (Argentine Naval Hydrography Institute) 80 Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 - 81 Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 - 82 # 83 # From Hernan G. Otero (1995-06-26): 84 # From this moment on, the law that mandated the daylight saving 85 # time corrections was derogated and no more modifications 86 # to the time zones (for daylight saving) are now made. 87 # 88 # From Rives McDow (2000-01-10): 89 # On October 3, 1999, 0:00 local, Argentina implemented daylight savings time, 90 # which did not result in the switch of a time zone, as they stayed 9 hours 91 # from the International Date Line. 92 Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 - 93 # From Paul Eggert (2007-12-28): 94 # DST was set to expire on March 5, not March 3, but since it was converted 95 # to standard time on March 3 it's more convenient for us to pretend that 96 # it ended on March 3. 97 Rule Arg 2000 only - Mar 3 0:00 0 - 98 # 99 # From Peter Gradelski via Steffen Thorsen (2000-03-01): 100 # We just checked with our So Paulo office and they say the government of 101 # Argentina decided not to become one of the countries that go on or off DST. 102 # So Buenos Aires should be -3 hours from GMT at all times. 103 # 104 # From Fabin L. Arce Jofr (2000-04-04): 105 # The law that claimed DST for Argentina was derogated by President Fernando 106 # de la Ra on March 2, 2000, because it would make people spend more energy 107 # in the winter time, rather than less. The change took effect on March 3. 108 # 109 # From Mariano Absatz (2001-06-06): 110 # one of the major newspapers here in Argentina said that the 1999 111 # Timezone Law (which never was effectively applied) will (would?) be 112 # in effect.... The article is at 113 # http://ar.clarin.com/diario/2001-06-06/e-01701.htm 114 # ... The Law itself is "Ley No. 25155", sanctioned on 1999-08-25, enacted 115 # 1999-09-17, and published 1999-09-21. The official publication is at: 116 # http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF 117 # Regretfully, you have to subscribe (and pay) for the on-line version.... 118 # 119 # (2001-06-12): 120 # the timezone for Argentina will not change next Sunday. 121 # Apparently it will do so on Sunday 24th.... 122 # http://ar.clarin.com/diario/2001-06-12/s-03501.htm 123 # 124 # (2001-06-25): 125 # Last Friday (yes, the last working day before the date of the change), the 126 # Senate annulled the 1999 law that introduced the changes later postponed. 127 # http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm 128 # It remains the vote of the Deputies..., but it will be the same.... 129 # This kind of things had always been done this way in Argentina. 130 # We are still -03:00 all year round in all of the country. 131 # 132 # From Steffen Thorsen (2007-12-21): 133 # A user (Leonardo Chaim) reported that Argentina will adopt DST.... 134 # all of the country (all Zone-entries) are affected. News reports like 135 # http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate 136 # that Argentina will use DST next year as well, from October to 137 # March, although exact rules are not given. 138 # 139 # From Jesper Nrgaard Welen (2007-12-26) 140 # The last hurdle of Argentina DST is over, the proposal was approved in 141 # the lower chamber too (Diputados) with a vote 192 for and 2 against. 142 # By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to 143 # the original scanned proposal, where the dates and the zero hours are 144 # clear and unambiguous...This is the article about final approval: 145 # http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996 146 # 147 # From Paul Eggert (2007-12-22): 148 # For dates after mid-2008, the following rules are my guesses and 149 # are quite possibly wrong, but are more likely than no DST at all. 150 151 # From Alexander Krivenyshev (2008-09-05): 152 # As per message from Carlos Alberto Fonseca Arauz (Nicaragua), 153 # Argentina will start DST on Sunday October 19, 2008. 154 # 155 # http://www.worldtimezone.com/dst_news/dst_news_argentina03.html 156 # http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish) 157 158 # From Juan Manuel Docile in https://bugs.gentoo.org/240339 (2008-10-07) 159 # via Rodrigo Severo: 160 # Argentinian law No. 25.155 is no longer valid. 161 # http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm 162 # The new one is law No. 26.350 163 # http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm 164 # So there is no summer time in Argentina for now. 165 166 # From Mariano Absatz (2008-10-20): 167 # Decree 1693/2008 applies Law 26.350 for the summer 2008/2009 establishing DST 168 # in Argentina from 2008-10-19 until 2009-03-15. 169 # http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01 170 # 171 172 # Decree 1705/2008 excepting 12 Provinces from applying DST in the summer 173 # 2008/2009: Catamarca, La Rioja, Mendoza, Salta, San Juan, San Luis, La 174 # Pampa, Neuqun, Rio Negro, Chubut, Santa Cruz and Tierra del Fuego 175 # http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01 176 # 177 # Press release 235 dated Saturday October 18th, from the Government of the 178 # Province of Jujuy saying it will not apply DST either (even when it was not 179 # included in Decree 1705/2008). 180 # http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc 181 182 # From fullinet (2009-10-18): 183 # As announced in 184 # http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356 185 # (an official .gob.ar) under title: "Sin Cambio de Hora" 186 # (English: "No hour change"). 187 # 188 # "Por el momento, el Gobierno Nacional resolvi no modificar la hora 189 # oficial, decisin que estaba en estudio para su implementacin el 190 # domingo 18 de octubre. Desde el Ministerio de Planificacin se anunci 191 # que la Argentina hoy, en estas condiciones meteorolgicas, no necesita 192 # la modificacin del huso horario, ya que 2009 nos encuentra con 193 # crecimiento en la produccin y distribucin energtica." 194 195 Rule Arg 2007 only - Dec 30 0:00 1:00 - 196 Rule Arg 2008 2009 - Mar Sun>=15 0:00 0 - 197 Rule Arg 2008 only - Oct Sun>=15 0:00 1:00 - 198 199 # From Mariano Absatz (2004-05-21): 200 # Today it was officially published that the Province of Mendoza is changing 201 # its timezone this winter... starting tomorrow night.... 202 # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf 203 # From Paul Eggert (2004-05-24): 204 # It's Law No. 7,210. This change is due to a public power emergency, so for 205 # now we'll assume it's for this year only. 206 # 207 # From Paul Eggert (2018-01-31): 208 # Hora de verano para la Repblica Argentina 209 # http://buenasiembra.com.ar/esoterismo/astrologia/hora-de-verano-de-la-republica-argentina-27.html 210 # says that standard time in Argentina from 1894-10-31 211 # to 1920-05-01 was -4:16:48.25. Go with this more precise value 212 # over Shanks & Pottenger. It is upward compatible with Milne, who 213 # says Crdoba time was -4:16:48.2. 214 215 # 216 # From Mariano Absatz (2004-06-05): 217 # These media articles from a major newspaper mostly cover the current state: 218 # http://www.lanacion.com.ar/04/05/27/de_604825.asp 219 # http://www.lanacion.com.ar/04/05/28/de_605203.asp 220 # 221 # The following eight (8) provinces pulled clocks back to UTC-04:00 at 222 # midnight Monday May 31st. (that is, the night between 05/31 and 06/01). 223 # Apparently, all nine provinces would go back to UTC-03:00 at the same 224 # time in October 17th. 225 # 226 # Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz, 227 # Tierra del Fuego, Tucumn. 228 # 229 # From Mariano Absatz (2004-06-14): 230 # ... this weekend, the Province of Tucumn decided it'd go back to UTC-03:00 231 # yesterday midnight (that is, at 24:00 Saturday 12th), since the people's 232 # annoyance with the change is much higher than the power savings obtained.... 233 # 234 # From Gwillim Law (2004-06-14): 235 # http://www.lanacion.com.ar/04/06/10/de_609078.asp ... 236 # "The time change in Tierra del Fuego was a conflicted decision from 237 # the start. The government had decreed that the measure would take 238 # effect on June 1, but a normative error forced the new time to begin 239 # three days earlier, from a Saturday to a Sunday.... 240 # Our understanding was that the change was originally scheduled to take place 241 # on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other 242 # provinces). Sunday was May 30, only two days earlier. So the article 243 # contains a contradiction. I would give more credence to the Saturday/Sunday 244 # date than the "three days earlier" phrase, and conclude that Tierra del 245 # Fuego set its clocks back at 2004-05-30 00:00. 246 # 247 # From Steffen Thorsen (2004-10-05): 248 # The previous law 7210 which changed the province of Mendoza's time zone 249 # back in May have been modified slightly in a new law 7277, which set the 250 # new end date to 2004-09-26 (original date was 2004-10-17). 251 # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf 252 # 253 # From Mariano Absatz (2004-10-05): 254 # San Juan changed from UTC-03:00 to UTC-04:00 at midnight between 255 # Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00 256 # at midnight between Saturday, July 24th and Sunday, July 25th.... 257 # http://www.sanjuan.gov.ar/prensa/archivo/000329.html 258 # http://www.sanjuan.gov.ar/prensa/archivo/000426.html 259 # http://www.sanjuan.gov.ar/prensa/archivo/000441.html 260 261 # From Alex Krivenyshev (2008-01-17): 262 # Here are articles that Argentina Province San Luis is planning to end DST 263 # as earlier as upcoming Monday January 21, 2008 or February 2008: 264 # 265 # Provincia argentina retrasa reloj y marca diferencia con resto del pas 266 # (Argentine Province delayed clock and mark difference with the rest of the 267 # country) 268 # http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel 269 # 270 # Es inminente que en San Luis atrasen una hora los relojes 271 # (It is imminent in San Luis clocks one hour delay) 272 # https://www.lagaceta.com.ar/nota/253414/Economia/Es-inminente-que-en-San-Luis-atrasen-una-hora-los-relojes.html 273 # http://www.worldtimezone.com/dst_news/dst_news_argentina02.html 274 275 # From Jesper Nrgaard Welen (2008-01-18): 276 # The page of the San Luis provincial government 277 # http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812 278 # confirms what Alex Krivenyshev has earlier sent to the tz 279 # emailing list about that San Luis plans to return to standard 280 # time much earlier than the rest of the country. It also 281 # confirms that upon request the provinces San Juan and Mendoza 282 # refused to follow San Luis in this change. 283 # 284 # The change is supposed to take place Monday the 21st at 0:00 285 # hours. As far as I understand it if this goes ahead, we need 286 # a new timezone for San Luis (although there are also documented 287 # independent changes in the southamerica file of San Luis in 288 # 1990 and 1991 which has not been confirmed). 289 290 # From Jesper Nrgaard Welen (2008-01-25): 291 # Unfortunately the below page has become defunct, about the San Luis 292 # time change. Perhaps because it now is part of a group of pages "Most 293 # important pages of 2008." 294 # 295 # You can use 296 # http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834 297 # instead it seems. Or use "Buscador" from the main page of the San Luis 298 # government, and fill in "huso" and click OK, and you will get 3 pages 299 # from which the first one is identical to the above. 300 301 # From Mariano Absatz (2008-01-28): 302 # I can confirm that the Province of San Luis (and so far only that 303 # province) decided to go back to UTC-3 effective midnight Jan 20th 2008 304 # (that is, Monday 21st at 0:00 is the time the clocks were delayed back 305 # 1 hour), and they intend to keep UTC-3 as their timezone all year round 306 # (that is, unless they change their mind any minute now). 307 # 308 # So we'll have to add yet another city to 'southamerica' (I think San 309 # Luis city is the mos populated city in the Province, so it'd be 310 # America/Argentina/San_Luis... of course I can't remember if San Luis's 311 # history of particular changes goes along with Mendoza or San Juan :-( 312 # (I only remember not being able to collect hard facts about San Luis 313 # back in 2004, when these provinces changed to UTC-4 for a few days, I 314 # mailed them personally and never got an answer). 315 316 # From Paul Eggert (2014-08-12): 317 # Unless otherwise specified, data entries are from Shanks & Pottenger through 318 # 1992, from the IATA otherwise. As noted below, Shanks & Pottenger say that 319 # America/Cordoba split into 6 subregions during 1991/1992, one of which 320 # was America/San_Luis, but we haven't verified this yet so for now we'll 321 # keep America/Cordoba a single region rather than splitting it into the 322 # other 5 subregions. 323 324 # From Mariano Absatz (2009-03-13): 325 # Yesterday (with our usual 2-day notice) the Province of San Luis 326 # decided that next Sunday instead of "staying" @utc-03:00 they will go 327 # to utc-04:00 until the second Saturday in October... 328 # 329 # The press release is at 330 # http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102 331 # (I couldn't find the decree, but www.sanluis.gov.ar 332 # is the official page for the Province Government.) 333 # 334 # There's also a note in only one of the major national papers ... 335 # http://www.lanacion.com.ar/nota.asp?nota_id=1107912 336 # 337 # The press release says [quick and dirty translation]: 338 # ... announced that next Sunday, at 00:00, Puntanos (the San Luis 339 # inhabitants) will have to turn back one hour their clocks 340 # 341 # Since then, San Luis will establish its own Province timezone. Thus, 342 # during 2009, this timezone change will run from 00:00 the third Sunday 343 # in March until 24:00 of the second Saturday in October. 344 345 # From Mariano Absatz (2009-10-16): 346 # ...the Province of San Luis is a case in itself. 347 # 348 # The Law at 349 # http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276 350 # is ambiguous because establishes a calendar from the 2nd Sunday in 351 # October at 0:00 thru the 2nd Saturday in March at 24:00 and the 352 # complement of that starting on the 2nd Sunday of March at 0:00 and 353 # ending on the 2nd Saturday of March at 24:00. 354 # 355 # This clearly breaks every time the 1st of March or October is a Sunday. 356 # 357 # IMHO, the "spirit of the Law" is to make the changes at 0:00 on the 2nd 358 # Sunday of October and March. 359 # 360 # The problem is that the changes in the rest of the Provinces that did 361 # change in 2007/2008, were made according to the Federal Law and Decrees 362 # that did so on the 3rd Sunday of October and March. 363 # 364 # In fact, San Luis actually switched from UTC-4 to UTC-3 last Sunday 365 # (October 11th) at 0:00. 366 # 367 # So I guess a new set of rules, besides "Arg", must be made and the last 368 # America/Argentina/San_Luis entries should change to use these... 369 # ... 370 371 # From Alexander Krivenyshev (2010-04-09): 372 # According to news reports from El Diario de la Repblica Province San 373 # Luis, Argentina (standard time UTC-04) will keep Daylight Saving Time 374 # after April 11, 2010 - will continue to have same time as rest of 375 # Argentina (UTC-3) (no DST). 376 # 377 # Confirmaron la prrroga del huso horario de verano (Spanish) 378 # http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9 379 # or (some English translation): 380 # http://www.worldtimezone.com/dst_news/dst_news_argentina08.html 381 382 # From Mariano Absatz (2010-04-12): 383 # yes...I can confirm this...and given that San Luis keeps calling 384 # UTC-03:00 "summer time", we should't just let San Luis go back to "Arg" 385 # rules...San Luis is still using "Western ARgentina Time" and it got 386 # stuck on Summer daylight savings time even though the summer is over. 387 388 # From Paul Eggert (2018-01-23): 389 # Perhaps San Luis operates on the legal fiction that it is at -04 390 # with perpetual daylight saving time, but ordinary usage typically seems to 391 # just say it's at -03; see, for example, 392 # https://es.wikipedia.org/wiki/Hora_oficial_argentina 393 # We've documented similar situations as being plain changes to 394 # standard time, so let's do that here too. This does not change UTC 395 # offsets, only tm_isdst and the time zone abbreviations. One minor 396 # plus is that this silences a zic complaint that there's no POSIX TZ 397 # setting for timestamps past 2038. 398 399 # Zone NAME STDOFF RULES FORMAT [UNTIL] 400 # 401 # Buenos Aires (BA), Capital Federal (CF), 402 Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31 403 #STDOFF -4:16:48.25 404 -4:16:48 - CMT 1920 May # Crdoba Mean Time 405 -4:00 - %z 1930 Dec 406 -4:00 Arg %z 1969 Oct 5 407 -3:00 Arg %z 1999 Oct 3 408 -4:00 Arg %z 2000 Mar 3 409 -3:00 Arg %z 410 # 411 # Crdoba (CB), Santa Fe (SF), Entre Ros (ER), Corrientes (CN), Misiones (MN), 412 # Chaco (CC), Formosa (FM), Santiago del Estero (SE) 413 # 414 # Shanks & Pottenger also make the following claims, which we haven't verified: 415 # - Formosa switched to -3:00 on 1991-01-07. 416 # - Misiones switched to -3:00 on 1990-12-29. 417 # - Chaco switched to -3:00 on 1991-01-04. 418 # - Santiago del Estero switched to -4:00 on 1991-04-01, 419 # then to -3:00 on 1991-04-26. 420 # 421 #STDOFF -4:16:48.25 422 Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31 423 -4:16:48 - CMT 1920 May 424 -4:00 - %z 1930 Dec 425 -4:00 Arg %z 1969 Oct 5 426 -3:00 Arg %z 1991 Mar 3 427 -4:00 - %z 1991 Oct 20 428 -3:00 Arg %z 1999 Oct 3 429 -4:00 Arg %z 2000 Mar 3 430 -3:00 Arg %z 431 # 432 # Salta (SA), La Pampa (LP), Neuqun (NQ), Rio Negro (RN) 433 Zone America/Argentina/Salta -4:21:40 - LMT 1894 Oct 31 434 #STDOFF -4:16:48.25 435 -4:16:48 - CMT 1920 May 436 -4:00 - %z 1930 Dec 437 -4:00 Arg %z 1969 Oct 5 438 -3:00 Arg %z 1991 Mar 3 439 -4:00 - %z 1991 Oct 20 440 -3:00 Arg %z 1999 Oct 3 441 -4:00 Arg %z 2000 Mar 3 442 -3:00 Arg %z 2008 Oct 18 443 -3:00 - %z 444 # 445 # Tucumn (TM) 446 Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31 447 #STDOFF -4:16:48.25 448 -4:16:48 - CMT 1920 May 449 -4:00 - %z 1930 Dec 450 -4:00 Arg %z 1969 Oct 5 451 -3:00 Arg %z 1991 Mar 3 452 -4:00 - %z 1991 Oct 20 453 -3:00 Arg %z 1999 Oct 3 454 -4:00 Arg %z 2000 Mar 3 455 -3:00 - %z 2004 Jun 1 456 -4:00 - %z 2004 Jun 13 457 -3:00 Arg %z 458 # 459 # La Rioja (LR) 460 Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31 461 #STDOFF -4:16:48.25 462 -4:16:48 - CMT 1920 May 463 -4:00 - %z 1930 Dec 464 -4:00 Arg %z 1969 Oct 5 465 -3:00 Arg %z 1991 Mar 1 466 -4:00 - %z 1991 May 7 467 -3:00 Arg %z 1999 Oct 3 468 -4:00 Arg %z 2000 Mar 3 469 -3:00 - %z 2004 Jun 1 470 -4:00 - %z 2004 Jun 20 471 -3:00 Arg %z 2008 Oct 18 472 -3:00 - %z 473 # 474 # San Juan (SJ) 475 Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31 476 #STDOFF -4:16:48.25 477 -4:16:48 - CMT 1920 May 478 -4:00 - %z 1930 Dec 479 -4:00 Arg %z 1969 Oct 5 480 -3:00 Arg %z 1991 Mar 1 481 -4:00 - %z 1991 May 7 482 -3:00 Arg %z 1999 Oct 3 483 -4:00 Arg %z 2000 Mar 3 484 -3:00 - %z 2004 May 31 485 -4:00 - %z 2004 Jul 25 486 -3:00 Arg %z 2008 Oct 18 487 -3:00 - %z 488 # 489 # Jujuy (JY) 490 Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31 491 #STDOFF -4:16:48.25 492 -4:16:48 - CMT 1920 May 493 -4:00 - %z 1930 Dec 494 -4:00 Arg %z 1969 Oct 5 495 -3:00 Arg %z 1990 Mar 4 496 -4:00 - %z 1990 Oct 28 497 -4:00 1:00 %z 1991 Mar 17 498 -4:00 - %z 1991 Oct 6 499 -3:00 1:00 %z 1992 500 -3:00 Arg %z 1999 Oct 3 501 -4:00 Arg %z 2000 Mar 3 502 -3:00 Arg %z 2008 Oct 18 503 -3:00 - %z 504 # 505 # Catamarca (CT), Chubut (CH) 506 Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31 507 #STDOFF -4:16:48.25 508 -4:16:48 - CMT 1920 May 509 -4:00 - %z 1930 Dec 510 -4:00 Arg %z 1969 Oct 5 511 -3:00 Arg %z 1991 Mar 3 512 -4:00 - %z 1991 Oct 20 513 -3:00 Arg %z 1999 Oct 3 514 -4:00 Arg %z 2000 Mar 3 515 -3:00 - %z 2004 Jun 1 516 -4:00 - %z 2004 Jun 20 517 -3:00 Arg %z 2008 Oct 18 518 -3:00 - %z 519 # 520 # Mendoza (MZ) 521 Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31 522 #STDOFF -4:16:48.25 523 -4:16:48 - CMT 1920 May 524 -4:00 - %z 1930 Dec 525 -4:00 Arg %z 1969 Oct 5 526 -3:00 Arg %z 1990 Mar 4 527 -4:00 - %z 1990 Oct 15 528 -4:00 1:00 %z 1991 Mar 1 529 -4:00 - %z 1991 Oct 15 530 -4:00 1:00 %z 1992 Mar 1 531 -4:00 - %z 1992 Oct 18 532 -3:00 Arg %z 1999 Oct 3 533 -4:00 Arg %z 2000 Mar 3 534 -3:00 - %z 2004 May 23 535 -4:00 - %z 2004 Sep 26 536 -3:00 Arg %z 2008 Oct 18 537 -3:00 - %z 538 # 539 # San Luis (SL) 540 541 Rule SanLuis 2008 2009 - Mar Sun>=8 0:00 0 - 542 Rule SanLuis 2007 2008 - Oct Sun>=8 0:00 1:00 - 543 544 Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31 545 #STDOFF -4:16:48.25 546 -4:16:48 - CMT 1920 May 547 -4:00 - %z 1930 Dec 548 -4:00 Arg %z 1969 Oct 5 549 -3:00 Arg %z 1990 550 -3:00 1:00 %z 1990 Mar 14 551 -4:00 - %z 1990 Oct 15 552 -4:00 1:00 %z 1991 Mar 1 553 -4:00 - %z 1991 Jun 1 554 -3:00 - %z 1999 Oct 3 555 -4:00 1:00 %z 2000 Mar 3 556 -3:00 - %z 2004 May 31 557 -4:00 - %z 2004 Jul 25 558 -3:00 Arg %z 2008 Jan 21 559 -4:00 SanLuis %z 2009 Oct 11 560 -3:00 - %z 561 # 562 # Santa Cruz (SC) 563 Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31 564 #STDOFF -4:16:48.25 565 -4:16:48 - CMT 1920 May 566 -4:00 - %z 1930 Dec 567 -4:00 Arg %z 1969 Oct 5 568 -3:00 Arg %z 1999 Oct 3 569 -4:00 Arg %z 2000 Mar 3 570 -3:00 - %z 2004 Jun 1 571 -4:00 - %z 2004 Jun 20 572 -3:00 Arg %z 2008 Oct 18 573 -3:00 - %z 574 # 575 # Tierra del Fuego, Antrtida e Islas del Atlntico Sur (TF) 576 Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31 577 #STDOFF -4:16:48.25 578 -4:16:48 - CMT 1920 May 579 -4:00 - %z 1930 Dec 580 -4:00 Arg %z 1969 Oct 5 581 -3:00 Arg %z 1999 Oct 3 582 -4:00 Arg %z 2000 Mar 3 583 -3:00 - %z 2004 May 30 584 -4:00 - %z 2004 Jun 20 585 -3:00 Arg %z 2008 Oct 18 586 -3:00 - %z 587 588 # Aruba 589 # Zone NAME STDOFF RULES FORMAT [UNTIL] 590 Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad 591 -4:30 - -0430 1965 592 -4:00 - AST 593 594 # Bolivia 595 # Zone NAME STDOFF RULES FORMAT [UNTIL] 596 Zone America/La_Paz -4:32:36 - LMT 1890 597 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT 598 -4:32:36 1:00 BST 1932 Mar 21 # Bolivia ST 599 -4:00 - %z 600 601 # Brazil 602 603 # From Paul Eggert (1993-11-18): 604 # The mayor of Rio recently attempted to change the time zone rules 605 # just in his city, in order to leave more summer time for the tourist trade. 606 # The rule change lasted only part of the day; 607 # the federal government refused to follow the city's rules, and business 608 # was in a chaos, so the mayor backed down that afternoon. 609 610 # From IATA SSIM (1996-02): 611 # _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS), 612 # Santa Catarina (SC), Paran (PR), So Paulo (SP), Rio de Janeiro (RJ), 613 # Esprito Santo (ES), Minas Gerais (MG), Bahia (BA), Gois (GO), 614 # Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL]. 615 # [The last three states are new to this issue of the IATA SSIM.] 616 617 # From Gwillim Law (1996-10-07): 618 # Geography, history (Tocantins was part of Gois until 1989), and other 619 # sources of time zone information lead me to believe that AL, SE, and TO were 620 # always in BR1, and so the only change was whether or not they observed DST.... 621 # The earliest issue of the SSIM I have is 2/91. Each issue from then until 622 # 9/95 says that DST is observed only in the ten states I quoted from 9/95, 623 # along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2 624 # (UTC-4).... The other two time zones given for Brazil are BR3, which is 625 # UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is 626 # UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's 627 # become part of the state of Pernambuco). The boundary between BR1 and BR2 628 # has never been clearly stated. They've simply been called East and West. 629 # However, some conclusions can be drawn from another IATA manual: the Airline 630 # Coding Directory, which lists close to 400 airports in Brazil. For each 631 # airport it gives a time zone which is coded to the SSIM. From that 632 # information, I'm led to conclude that the states of Amap (AP), Cear (CE), 633 # Maranho (MA), Paraba (PR), Pernambuco (PE), Piau (PI), and Rio Grande do 634 # Norte (RN), and the eastern part of Par (PA) are all in BR1 without DST. 635 636 # From Marcos Tadeu (1998-09-27): 637 # Brazilian official page <http://pcdsh01.on.br/verao1.html> 638 639 # From Jesper Nrgaard (2000-11-03): 640 # [For an official list of which regions in Brazil use which time zones, see:] 641 # http://pcdsh01.on.br/Fusbr.htm 642 # http://pcdsh01.on.br/Fusbrhv.htm 643 644 # From Celso Doria via David Madeo (2002-10-09): 645 # The reason for the delay this year has to do with elections in Brazil. 646 # 647 # Unlike in the United States, elections in Brazil are 100% computerized and 648 # the results are known almost immediately. Yesterday, it was the first 649 # round of the elections when 115 million Brazilians voted for President, 650 # Governor, Senators, Federal Deputies, and State Deputies. Nobody is 651 # counting (or re-counting) votes anymore and we know there will be a second 652 # round for the Presidency and also for some Governors. The 2nd round will 653 # take place on October 27th. 654 # 655 # The reason why the DST will only begin November 3rd is that the thousands 656 # of electoral machines used cannot have their time changed, and since the 657 # Constitution says the elections must begin at 8:00 AM and end at 5:00 PM, 658 # the Government decided to postpone DST, instead of changing the Constitution 659 # (maybe, for the next elections, it will be possible to change the clock)... 660 661 # From Rodrigo Severo (2004-10-04): 662 # It's just the biannual change made necessary by the much hyped, supposedly 663 # modern Brazilian ... voting machines which, apparently, can't deal 664 # with a time change between the first and the second rounds of the elections. 665 666 # From Steffen Thorsen (2007-09-20): 667 # Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00: 668 # http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975 669 670 # From Paul Schulze (2008-06-24): 671 # ...by law number 11.662 of April 24, 2008 (published in the "Diario 672 # Oficial da Unio"...) in Brazil there are changes in the timezones, 673 # effective today (00:00am at June 24, 2008) as follows: 674 # 675 # a) The timezone UTC+5 is extinguished, with all the Acre state and the 676 # part of the Amazonas state that had this timezone now being put to the 677 # timezone UTC+4 678 # b) The whole Par state now is put at timezone UTC+3, instead of just 679 # part of it, as was before. 680 # 681 # This change follows a proposal of senator Tiao Viana of Acre state, that 682 # proposed it due to concerns about open television channels displaying 683 # programs inappropriate to youths in the states that had the timezone 684 # UTC+5 too early in the night. In the occasion, some more corrections 685 # were proposed, trying to unify the timezones of any given state. This 686 # change modifies timezone rules defined in decree 2.784 of 18 June, 687 # 1913. 688 689 # From Rodrigo Severo (2008-06-24): 690 # Just correcting the URL: 691 # https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008 692 # 693 # As a result of the above Decree I believe the America/Rio_Branco 694 # timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall 695 # be created to represent the...west side of the Par State. I 696 # suggest this new timezone be called Santarem as the most 697 # important/populated city in the affected area. 698 # 699 # This new timezone would be the same as the Rio_Branco timezone up to 700 # the 2008/06/24 change which would be to UTC-3 instead of UTC-4. 701 702 # From Alex Krivenyshev (2008-06-24): 703 # This is a quick reference page for New and Old Brazil Time Zones map. 704 # http://www.worldtimezone.com/brazil-time-new-old.php 705 # 706 # - 4 time zones replaced by 3 time zones - eliminating time zone UTC-05 707 # (state Acre and the part of the Amazonas will be UTC/GMT-04) - western 708 # part of Par state is moving to one timezone UTC-03 (from UTC-04). 709 710 # From Paul Eggert (2002-10-10): 711 # The official decrees referenced below are mostly taken from 712 # Decretos sobre o Horrio de Vero no Brasil. 713 # http://pcdsh01.on.br/DecHV.html 714 715 # From Steffen Thorsen (2008-08-29): 716 # As announced by the government and many newspapers in Brazil late 717 # yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and 718 # it will end on 2009-02-15 (current rule for Brazil is fine). Based on 719 # past years experience with the elections, there was a good chance that 720 # the start was postponed to November, but it did not happen this year. 721 # 722 # It has not yet been posted to http://pcdsh01.on.br/DecHV.html 723 # 724 # An official page about it: 725 # http://www.mme.gov.br/site/news/detail.do?newsId=16722 726 # Note that this link does not always work directly, but must be accessed 727 # by going to 728 # http://www.mme.gov.br/first 729 # 730 # One example link that works directly: 731 # http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54 732 # (Portuguese) 733 # 734 # We have a written a short article about it as well: 735 # https://www.timeanddate.com/news/time/brazil-dst-2008-2009.html 736 # 737 # From Alexander Krivenyshev (2011-10-04): 738 # State Bahia will return to Daylight savings time this year after 8 years off. 739 # The announcement was made by Governor Jaques Wagner in an interview to a 740 # television station in Salvador. 741 742 # In Portuguese: 743 # http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html 744 # https://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html 745 746 # From Guilherme Bernardes Rodrigues (2011-10-07): 747 # There is news in the media, however there is still no decree about it. 748 # I just send a e-mail to Zulmira Brandao at http://pcdsh01.on.br/ the 749 # official agency about time in Brazil, and she confirmed that the old rule is 750 # still in force. 751 752 # From Guilherme Bernardes Rodrigues (2011-10-14) 753 # It's official, the President signed a decree that includes Bahia in summer 754 # time. 755 # [ and in a second message (same day): ] 756 # I found the decree. 757 # 758 # DECRETO No. 7.584, DE 13 DE OUTUBRO DE 2011 759 # Link : 760 # http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6 761 762 # From Kelley Cook (2012-10-16): 763 # The governor of state of Bahia in Brazil announced on Thursday that 764 # due to public pressure, he is reversing the DST policy they implemented 765 # last year and will not be going to Summer Time on October 21st.... 766 # http://www.correio24horas.com.br/r/artigo/apos-pressoes-wagner-suspende-horario-de-verao-na-bahia 767 768 # From Rodrigo Severo (2012-10-16): 769 # Tocantins state will have DST. 770 # https://noticias.terra.com.br/brasil/noticias/0,,OI6232536-EI306.html 771 772 # From Steffen Thorsen (2013-09-20): 773 # Tocantins in Brazil is very likely not to observe DST from October.... 774 # http://conexaoto.com.br/2013/09/18/ministerio-confirma-que-tocantins-esta-fora-do-horario-de-verao-em-2013-mas-falta-publicacao-de-decreto 775 # We will keep this article updated when this is confirmed: 776 # https://www.timeanddate.com/news/time/brazil-starts-dst-2013.html 777 778 # From Steffen Thorsen (2013-10-17): 779 # https://www.timeanddate.com/news/time/acre-amazonas-change-time-zone.html 780 # Senator Jorge Viana announced that Acre will change time zone on November 10. 781 # He did not specify the time of the change, nor if western parts of Amazonas 782 # will change as well. 783 # 784 # From Paul Eggert (2013-10-17): 785 # For now, assume western Amazonas will change as well. 786 787 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S 788 # Decree 20,466 <http://pcdsh01.on.br/HV20466.htm> (1931-10-01) 789 # Decree 21,896 <http://pcdsh01.on.br/HV21896.htm> (1932-01-10) 790 Rule Brazil 1931 only - Oct 3 11:00 1:00 - 791 Rule Brazil 1932 1933 - Apr 1 0:00 0 - 792 Rule Brazil 1932 only - Oct 3 0:00 1:00 - 793 # Decree 23,195 <http://pcdsh01.on.br/HV23195.htm> (1933-10-10) 794 # revoked DST. 795 # Decree 27,496 <http://pcdsh01.on.br/HV27496.htm> (1949-11-24) 796 # Decree 27,998 <http://pcdsh01.on.br/HV27998.htm> (1950-04-13) 797 Rule Brazil 1949 1952 - Dec 1 0:00 1:00 - 798 Rule Brazil 1950 only - Apr 16 1:00 0 - 799 Rule Brazil 1951 1952 - Apr 1 0:00 0 - 800 # Decree 32,308 <http://pcdsh01.on.br/HV32308.htm> (1953-02-24) 801 Rule Brazil 1953 only - Mar 1 0:00 0 - 802 # Decree 34,724 <http://pcdsh01.on.br/HV34724.htm> (1953-11-30) 803 # revoked DST. 804 # Decree 52,700 <http://pcdsh01.on.br/HV52700.htm> (1963-10-18) 805 # established DST from 1963-10-23 00:00 to 1964-02-29 00:00 806 # in SP, RJ, GB, MG, ES, due to the prolongation of the drought. 807 # Decree 53,071 <http://pcdsh01.on.br/HV53071.htm> (1963-12-03) 808 # extended the above decree to all of the national territory on 12-09. 809 Rule Brazil 1963 only - Dec 9 0:00 1:00 - 810 # Decree 53,604 <http://pcdsh01.on.br/HV53604.htm> (1964-02-25) 811 # extended summer time by one day to 1964-03-01 00:00 (start of school). 812 Rule Brazil 1964 only - Mar 1 0:00 0 - 813 # Decree 55,639 <http://pcdsh01.on.br/HV55639.htm> (1965-01-27) 814 Rule Brazil 1965 only - Jan 31 0:00 1:00 - 815 Rule Brazil 1965 only - Mar 31 0:00 0 - 816 # Decree 57,303 <http://pcdsh01.on.br/HV57303.htm> (1965-11-22) 817 Rule Brazil 1965 only - Dec 1 0:00 1:00 - 818 # Decree 57,843 <http://pcdsh01.on.br/HV57843.htm> (1966-02-18) 819 Rule Brazil 1966 1968 - Mar 1 0:00 0 - 820 Rule Brazil 1966 1967 - Nov 1 0:00 1:00 - 821 # Decree 63,429 <http://pcdsh01.on.br/HV63429.htm> (1968-10-15) 822 # revoked DST. 823 # Decree 91,698 <http://pcdsh01.on.br/HV91698.htm> (1985-09-27) 824 Rule Brazil 1985 only - Nov 2 0:00 1:00 - 825 # Decree 92,310 (1986-01-21) 826 # Decree 92,463 (1986-03-13) 827 Rule Brazil 1986 only - Mar 15 0:00 0 - 828 # Decree 93,316 (1986-10-01) 829 Rule Brazil 1986 only - Oct 25 0:00 1:00 - 830 Rule Brazil 1987 only - Feb 14 0:00 0 - 831 # Decree 94,922 <http://pcdsh01.on.br/HV94922.htm> (1987-09-22) 832 Rule Brazil 1987 only - Oct 25 0:00 1:00 - 833 Rule Brazil 1988 only - Feb 7 0:00 0 - 834 # Decree 96,676 <http://pcdsh01.on.br/HV96676.htm> (1988-09-12) 835 # except for the states of AC, AM, PA, RR, RO, and AP (then a territory) 836 Rule Brazil 1988 only - Oct 16 0:00 1:00 - 837 Rule Brazil 1989 only - Jan 29 0:00 0 - 838 # Decree 98,077 <http://pcdsh01.on.br/HV98077.htm> (1989-08-21) 839 # with the same exceptions 840 Rule Brazil 1989 only - Oct 15 0:00 1:00 - 841 Rule Brazil 1990 only - Feb 11 0:00 0 - 842 # Decree 99,530 <http://pcdsh01.on.br/HV99530.htm> (1990-09-17) 843 # adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF. 844 # Decree 99,629 (1990-10-19) adds BA, MT. 845 Rule Brazil 1990 only - Oct 21 0:00 1:00 - 846 Rule Brazil 1991 only - Feb 17 0:00 0 - 847 # Unnumbered decree <http://pcdsh01.on.br/HV1991.htm> (1991-09-25) 848 # adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF. 849 Rule Brazil 1991 only - Oct 20 0:00 1:00 - 850 Rule Brazil 1992 only - Feb 9 0:00 0 - 851 # Unnumbered decree <http://pcdsh01.on.br/HV1992.htm> (1992-10-16) 852 # adopted by same states. 853 Rule Brazil 1992 only - Oct 25 0:00 1:00 - 854 Rule Brazil 1993 only - Jan 31 0:00 0 - 855 # Decree 942 <http://pcdsh01.on.br/HV942.htm> (1993-09-28) 856 # adopted by same states, plus AM. 857 # Decree 1,252 <http://pcdsh01.on.br/HV1252.htm> (1994-09-22; 858 # web page corrected 2004-01-07) adopted by same states, minus AM. 859 # Decree 1,636 <http://pcdsh01.on.br/HV1636.htm> (1995-09-14) 860 # adopted by same states, plus MT and TO. 861 # Decree 1,674 <http://pcdsh01.on.br/HV1674.htm> (1995-10-13) 862 # adds AL, SE. 863 Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 - 864 Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 - 865 Rule Brazil 1996 only - Feb 11 0:00 0 - 866 # Decree 2,000 <http://pcdsh01.on.br/HV2000.htm> (1996-09-04) 867 # adopted by same states, minus AL, SE. 868 Rule Brazil 1996 only - Oct 6 0:00 1:00 - 869 Rule Brazil 1997 only - Feb 16 0:00 0 - 870 # From Daniel C. Sobral (1998-02-12): 871 # In 1997, the DS began on October 6. The stated reason was that 872 # because international television networks ignored Brazil's policy on DS, 873 # they bought the wrong times on satellite for coverage of Pope's visit. 874 # This year, the ending date of DS was postponed to March 1 875 # to help dealing with the shortages of electric power. 876 # 877 # Decree 2,317 (1997-09-04), adopted by same states. 878 Rule Brazil 1997 only - Oct 6 0:00 1:00 - 879 # Decree 2,495 <http://pcdsh01.on.br/figuras/HV2495.JPG> 880 # (1998-02-10) 881 Rule Brazil 1998 only - Mar 1 0:00 0 - 882 # Decree 2,780 <http://pcdsh01.on.br/figuras/Hv98.jpg> (1998-09-11) 883 # adopted by the same states as before. 884 Rule Brazil 1998 only - Oct 11 0:00 1:00 - 885 Rule Brazil 1999 only - Feb 21 0:00 0 - 886 # Decree 3,150 <http://pcdsh01.on.br/figuras/HV3150.gif> 887 # (1999-08-23) adopted by same states. 888 # Decree 3,188 <http://pcdsh01.on.br/DecHV99.gif> (1999-09-30) 889 # adds SE, AL, PB, PE, RN, CE, PI, MA and RR. 890 Rule Brazil 1999 only - Oct 3 0:00 1:00 - 891 Rule Brazil 2000 only - Feb 27 0:00 0 - 892 # Decree 3,592 <http://pcdsh01.on.br/DEC3592.htm> (2000-09-06) 893 # adopted by the same states as before. 894 # Decree 3,630 <http://pcdsh01.on.br/Dec3630.jpg> (2000-10-13) 895 # repeals DST in PE and RR, effective 2000-10-15 00:00. 896 # Decree 3,632 <http://pcdsh01.on.br/Dec3632.jpg> (2000-10-17) 897 # repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00. 898 # Decree 3,916 <http://pcdsh01.on.br/figuras/HV3916.gif> 899 # (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE. 900 Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 - 901 Rule Brazil 2001 2006 - Feb Sun>=15 0:00 0 - 902 # Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE. 903 # 4,399 <http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm> 904 Rule Brazil 2002 only - Nov 3 0:00 1:00 - 905 # Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO. 906 # 4,844 <http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm> 907 Rule Brazil 2003 only - Oct 19 0:00 1:00 - 908 # Decree 5,223 (2004-10-01) reestablishes DST in MT. 909 # 5,223 <http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm> 910 Rule Brazil 2004 only - Nov 2 0:00 1:00 - 911 # Decree 5,539 <http://pcdsh01.on.br/DecHV5539.gif> (2005-09-19), 912 # adopted by the same states as before. 913 Rule Brazil 2005 only - Oct 16 0:00 1:00 - 914 # Decree 5,920 <http://pcdsh01.on.br/DecHV5920.gif> (2006-10-03), 915 # adopted by the same states as before. 916 Rule Brazil 2006 only - Nov 5 0:00 1:00 - 917 Rule Brazil 2007 only - Feb 25 0:00 0 - 918 # Decree 6,212 <http://pcdsh01.on.br/DecHV6212.gif> (2007-09-26), 919 # adopted by the same states as before. 920 Rule Brazil 2007 only - Oct Sun>=8 0:00 1:00 - 921 # From Frederico A. C. Neves (2008-09-10): 922 # According to this decree 923 # http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm 924 # [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the 925 # 3rd Feb Sunday. There is an exception on the return date when this is 926 # the Carnival Sunday then the return date will be the next Sunday... 927 Rule Brazil 2008 2017 - Oct Sun>=15 0:00 1:00 - 928 Rule Brazil 2008 2011 - Feb Sun>=15 0:00 0 - 929 # Decree 7,584 <http://pcdsh01.on.br/HVdecreto7584_20111013.jpg> (2011-10-13) 930 # added Bahia. 931 Rule Brazil 2012 only - Feb Sun>=22 0:00 0 - 932 # Decree 7,826 <http://pcdsh01.on.br/HVdecreto7826_20121015.jpg> (2012-10-15) 933 # removed Bahia and added Tocantins. 934 # Decree 8,112 <http://pcdsh01.on.br/HVdecreto8112_20130930.JPG> (2013-09-30) 935 # removed Tocantins. 936 Rule Brazil 2013 2014 - Feb Sun>=15 0:00 0 - 937 Rule Brazil 2015 only - Feb Sun>=22 0:00 0 - 938 Rule Brazil 2016 2019 - Feb Sun>=15 0:00 0 - 939 # From Steffen Thorsen (2017-12-18): 940 # According to many media sources, next year's DST start in Brazil will move to 941 # the first Sunday of November 942 # ... https://www.timeanddate.com/news/time/brazil-delays-dst-2018.html 943 # From Steffen Thorsen (2017-12-20): 944 # http://www.planalto.gov.br/ccivil_03/_ato2015-2018/2017/decreto/D9242.htm 945 # From Fbio Gomes (2018-10-04): 946 # The Brazilian president just announced a new change on this year DST. 947 # It was scheduled to start on November 4th and it was changed to November 18th. 948 # From Rodrigo Brning Wessler (2018-10-15): 949 # The Brazilian government just announced that the change in DST was 950 # canceled.... Maybe the president Michel Temer also woke up one hour 951 # earlier today. :) 952 Rule Brazil 2018 only - Nov Sun>=1 0:00 1:00 - 953 # The last ruleset listed above says that the following states observed DST: 954 # DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP. 955 # 956 # From Steffen Thorsen (2019-04-05): 957 # According to multiple sources the Brazilian president wants to get rid of DST. 958 # https://gmconline.com.br/noticias/politica/bolsonaro-horario-de-verao-deve-acabar-este-ano 959 # https://g1.globo.com/economia/noticia/2019/04/05/governo-anuncia-fim-do-horario-de-verao.ghtml 960 # From Marcus Diniz (2019-04-25): 961 # Brazil no longer has DST changes - decree signed today 962 # https://g1.globo.com/politica/noticia/2019/04/25/bolsonaro-assina-decreto-que-acaba-com-o-horario-de-verao.ghtml 963 # From Daniel Soares de Oliveira (2019-04-26): 964 # http://www.planalto.gov.br/ccivil_03/_Ato2019-2022/2019/Decreto/D9772.htm 965 966 # Zone NAME STDOFF RULES FORMAT [UNTIL] 967 # 968 # Fernando de Noronha (administratively part of PE) 969 Zone America/Noronha -2:09:40 - LMT 1914 970 -2:00 Brazil %z 1990 Sep 17 971 -2:00 - %z 1999 Sep 30 972 -2:00 Brazil %z 2000 Oct 15 973 -2:00 - %z 2001 Sep 13 974 -2:00 Brazil %z 2002 Oct 1 975 -2:00 - %z 976 # Other Atlantic islands have no permanent settlement. 977 # These include Trindade and Martim Vaz (administratively part of ES), 978 # Rocas Atoll (RN), and the St Peter and St Paul Archipelago (PE). 979 # Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01; 980 # it also included the Penedos. 981 # 982 # Amap (AP), east Par (PA) 983 # East Par includes Belm, Marab, Serra Norte, and So Flix do Xingu. 984 # The division between east and west Par is the river Xingu. 985 # In the north a very small part from the river Javary (now Jari I guess, 986 # the border with Amap) to the Amazon, then to the Xingu. 987 Zone America/Belem -3:13:56 - LMT 1914 988 -3:00 Brazil %z 1988 Sep 12 989 -3:00 - %z 990 # 991 # west Par (PA) 992 # West Par includes Altamira, bidos, Prainha, Oriximin, and Santarm. 993 Zone America/Santarem -3:38:48 - LMT 1914 994 -4:00 Brazil %z 1988 Sep 12 995 -4:00 - %z 2008 Jun 24 0:00 996 -3:00 - %z 997 # 998 # Maranho (MA), Piau (PI), Cear (CE), Rio Grande do Norte (RN), 999 # Paraba (PB) 1000 Zone America/Fortaleza -2:34:00 - LMT 1914 1001 -3:00 Brazil %z 1990 Sep 17 1002 -3:00 - %z 1999 Sep 30 1003 -3:00 Brazil %z 2000 Oct 22 1004 -3:00 - %z 2001 Sep 13 1005 -3:00 Brazil %z 2002 Oct 1 1006 -3:00 - %z 1007 # 1008 # Pernambuco (PE) (except Atlantic islands) 1009 Zone America/Recife -2:19:36 - LMT 1914 1010 -3:00 Brazil %z 1990 Sep 17 1011 -3:00 - %z 1999 Sep 30 1012 -3:00 Brazil %z 2000 Oct 15 1013 -3:00 - %z 2001 Sep 13 1014 -3:00 Brazil %z 2002 Oct 1 1015 -3:00 - %z 1016 # 1017 # Tocantins (TO) 1018 Zone America/Araguaina -3:12:48 - LMT 1914 1019 -3:00 Brazil %z 1990 Sep 17 1020 -3:00 - %z 1995 Sep 14 1021 -3:00 Brazil %z 2003 Sep 24 1022 -3:00 - %z 2012 Oct 21 1023 -3:00 Brazil %z 2013 Sep 1024 -3:00 - %z 1025 # 1026 # Alagoas (AL), Sergipe (SE) 1027 Zone America/Maceio -2:22:52 - LMT 1914 1028 -3:00 Brazil %z 1990 Sep 17 1029 -3:00 - %z 1995 Oct 13 1030 -3:00 Brazil %z 1996 Sep 4 1031 -3:00 - %z 1999 Sep 30 1032 -3:00 Brazil %z 2000 Oct 22 1033 -3:00 - %z 2001 Sep 13 1034 -3:00 Brazil %z 2002 Oct 1 1035 -3:00 - %z 1036 # 1037 # Bahia (BA) 1038 # There are too many Salvadors elsewhere, so use America/Bahia instead 1039 # of America/Salvador. 1040 Zone America/Bahia -2:34:04 - LMT 1914 1041 -3:00 Brazil %z 2003 Sep 24 1042 -3:00 - %z 2011 Oct 16 1043 -3:00 Brazil %z 2012 Oct 21 1044 -3:00 - %z 1045 # 1046 # Gois (GO), Distrito Federal (DF), Minas Gerais (MG), 1047 # Esprito Santo (ES), Rio de Janeiro (RJ), So Paulo (SP), Paran (PR), 1048 # Santa Catarina (SC), Rio Grande do Sul (RS) 1049 Zone America/Sao_Paulo -3:06:28 - LMT 1914 1050 -3:00 Brazil %z 1963 Oct 23 0:00 1051 -3:00 1:00 %z 1964 1052 -3:00 Brazil %z 1053 # 1054 # Mato Grosso do Sul (MS) 1055 Zone America/Campo_Grande -3:38:28 - LMT 1914 1056 -4:00 Brazil %z 1057 # 1058 # Mato Grosso (MT) 1059 Zone America/Cuiaba -3:44:20 - LMT 1914 1060 -4:00 Brazil %z 2003 Sep 24 1061 -4:00 - %z 2004 Oct 1 1062 -4:00 Brazil %z 1063 # 1064 # Rondnia (RO) 1065 Zone America/Porto_Velho -4:15:36 - LMT 1914 1066 -4:00 Brazil %z 1988 Sep 12 1067 -4:00 - %z 1068 # 1069 # Roraima (RR) 1070 Zone America/Boa_Vista -4:02:40 - LMT 1914 1071 -4:00 Brazil %z 1988 Sep 12 1072 -4:00 - %z 1999 Sep 30 1073 -4:00 Brazil %z 2000 Oct 15 1074 -4:00 - %z 1075 # 1076 # east Amazonas (AM): Boca do Acre, Juta, Manaus, Floriano Peixoto 1077 # The great circle line from Tabatinga to Porto Acre divides 1078 # east from west Amazonas. 1079 Zone America/Manaus -4:00:04 - LMT 1914 1080 -4:00 Brazil %z 1988 Sep 12 1081 -4:00 - %z 1993 Sep 28 1082 -4:00 Brazil %z 1994 Sep 22 1083 -4:00 - %z 1084 # 1085 # west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant, 1086 # Eirunep, Envira, Ipixuna 1087 Zone America/Eirunepe -4:39:28 - LMT 1914 1088 -5:00 Brazil %z 1988 Sep 12 1089 -5:00 - %z 1993 Sep 28 1090 -5:00 Brazil %z 1994 Sep 22 1091 -5:00 - %z 2008 Jun 24 0:00 1092 -4:00 - %z 2013 Nov 10 1093 -5:00 - %z 1094 # 1095 # Acre (AC) 1096 Zone America/Rio_Branco -4:31:12 - LMT 1914 1097 -5:00 Brazil %z 1988 Sep 12 1098 -5:00 - %z 2008 Jun 24 0:00 1099 -4:00 - %z 2013 Nov 10 1100 -5:00 - %z 1101 1102 # Chile 1103 1104 # From Paul Eggert (2022-03-15): 1105 # Shanks & Pottenger says America/Santiago introduced standard time in 1106 # 1890 and rounds its UT offset to 70W40; guess that in practice this 1107 # was the same offset as in 1916-1919. It also says Pacific/Easter 1108 # standardized on 109W22 in 1890; assume this didn't change the clocks. 1109 # 1110 # Dates for America/Santiago from 1910 to 2004 are primarily from 1111 # the following source, cited by Oscar van Vlijmen (2006-10-08): 1112 # [1] Chile Law 1113 # http://www.webexhibits.org/daylightsaving/chile.html 1114 # This contains a copy of this official table: 1115 # Cambios en la hora oficial de Chile desde 1900 (retrieved 2008-03-30) 1116 # https://web.archive.org/web/20080330200901/http://www.horaoficial.cl/cambio.htm 1117 # [1] needs several corrections, though. 1118 # 1119 # The first set of corrections is from: 1120 # [2] History of the Official Time of Chile 1121 # http://www.horaoficial.cl/ing/horaof_ing.html (retrieved 2012-03-06). See: 1122 # https://web.archive.org/web/20120306042032/http://www.horaoficial.cl/ing/horaof_ing.html 1123 # This is an English translation of: 1124 # Historia de la hora oficial de Chile (retrieved 2012-10-24). See: 1125 # https://web.archive.org/web/20121024234627/http://www.horaoficial.cl/horaof.htm 1126 # A fancier Spanish version (requiring mouse-clicking) is at: 1127 # http://www.horaoficial.cl/historia_hora.php 1128 # Conflicts between [1] and [2] were resolved as follows: 1129 # 1130 # - [1] says the 1910 transition was Jan 1, [2] says Jan 10 and cites 1131 # Boletn No. 1, Aviso No. 1 (1910). Go with [2]. 1132 # 1133 # - [1] says SMT was -4:42:45, [2] says Chile's official time from 1134 # 1916 to 1919 was -4:42:46.3, the meridian of Chile's National 1135 # Astronomical Observatory (OAN), then located in what is now 1136 # Quinta Normal in Santiago. Go with [1], as this matches the meridian 1137 # referred to by the relevant Chilean laws to this day. 1138 # 1139 # - [1] says the 1918 transition was Sep 1, [2] says Sep 10 and cites 1140 # Boletn 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 Nrgaard 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 Tim Parenti (2022-07-06): 1160 # For a brief period of roughly six weeks in 1946, DST was only observed on an 1161 # emergency basis in specific regions of central Chile; namely, "the national 1162 # territory between the provinces of Coquimbo and Concepcin, inclusive". 1163 # This was enacted by Decree 3,891, dated 1946-07-13, and took effect 1164 # 1946-07-14 24:00, advancing these central regions to -03. 1165 # https://www.diariooficial.interior.gob.cl/versiones-anteriores/do-h/19460715/#page/1 1166 # The decree contemplated "[t]hat this advancement of the Official Time, even 1167 # though it has been proposed for the cities of Santiago and Valparaso only, 1168 # must be agreed with that of other cities, due to the connection of various 1169 # activities that require it, such as, for example, the operation of rail 1170 # services". It was originally set to expire after 30 days but was extended 1171 # through 1946-08-31 by Decree 4,506, dated 1946-08-13. 1172 # https://www.diariooficial.interior.gob.cl/versiones-anteriores/do-h/19460814/#page/1 1173 # 1174 # Law Number 8,522, promulgated 1946-08-27, reunified Chilean clocks at their 1175 # new "Summer Time" of -04, reckoned as that of "the meridian of the 1176 # Astronomical Observatory of Lo Espejo, advanced by 42 minutes and 45 1177 # seconds". Although this law specified the new Summer Time to start on 1 1178 # September each year, a special "transitional article" started it a few days 1179 # early, as soon as the law took effect. As the law was to take force "from 1180 # the date of its publication in the 'Diario Oficial', which happened the 1181 # following day, presume the change took place in Santiago and its environs 1182 # from 24:00 -03 to 23:00 -04 on Wednesday 1946-08-28. Although this was a 1183 # no-op for wall clocks in the north and south of the country, put their formal 1184 # start to DST an hour later when they reached 24:00 -04. 1185 # https://www.diariooficial.interior.gob.cl/versiones-anteriores/do-h/19460828/#page/1 1186 # After a brief "Winter Time" stint at -05 beginning 1947-04-01, Law Number 1187 # 8,777, promulgated 1947-05-17, established year-round -04 "from 23:00 on the 1188 # second day after it is published in the 'Diario Oficial'." It was published 1189 # on Monday 1947-05-19 and so took effect from Wednesday 1947-05-21 23:00. 1190 # https://www.diariooficial.interior.gob.cl/versiones-anteriores/do-h/19470519/#page/1 1191 1192 # From Eduardo Krell (1995-10-19): 1193 # The law says to switch to DST at midnight [24:00] on the second SATURDAY 1194 # of October.... The law is the same for March and October. 1195 # (1998-09-29): 1196 # Because of the drought this year, the government decided to go into 1197 # DST earlier (saturday 9/26 at 24:00). This is a one-time change only ... 1198 # (unless there's another dry season next year, I guess). 1199 1200 # From Julio I. Pacheco Troncoso (1999-03-18): 1201 # Because of the same drought, the government decided to end DST later, 1202 # on April 3, (one-time change). 1203 1204 # From Germn Poo-Caamao (2008-03-03): 1205 # Due to drought, Chile extends Daylight Time in three weeks. This 1206 # is one-time change (Saturday 3/29 at 24:00 for America/Santiago 1207 # and Saturday 3/29 at 22:00 for Pacific/Easter) 1208 # The Supreme Decree is located at 1209 # http://www.shoa.cl/servicios/supremo316.pdf 1210 # 1211 # From Jos Miguel Garrido (2008-03-05): 1212 # http://www.shoa.cl/noticias/2008/04hora/hora.htm 1213 1214 # From Angel Chiang (2010-03-04): 1215 # Subject: DST in Chile exceptionally extended to 3 April due to earthquake 1216 # http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098 1217 # 1218 # From Arthur David Olson (2010-03-06): 1219 # Angel Chiang's message confirmed by Julio Pacheco; Julio provided a patch. 1220 1221 # From Glenn Eychaner (2011-03-28): 1222 # http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E} 1223 # In English: 1224 # Chile's clocks will go back an hour this year on the 7th of May instead 1225 # of this Saturday. They will go forward again the 3rd Saturday in 1226 # August, not in October as they have since 1968. 1227 1228 # From Mauricio Parada (2012-02-22), translated by Glenn Eychaner (2012-02-23): 1229 # As stated in the website of the Chilean Energy Ministry 1230 # http://www.minenergia.cl/ministerio/noticias/generales/gobierno-anuncia-fechas-de-cambio-de.html 1231 # The Chilean Government has decided to postpone the entrance into winter time 1232 # (to leave DST) from March 11 2012 to April 28th 2012.... 1233 # Quote from the website communication: 1234 # 1235 # 6. For the year 2012, the dates of entry into winter time will be as follows: 1236 # a. Saturday April 28, 2012, clocks should go back 60 minutes; that is, at 1237 # 23:59:59, instead of passing to 0:00, the time should be adjusted to be 23:00 1238 # of the same day. 1239 # b. Saturday, September 1, 2012, clocks should go forward 60 minutes; that is, 1240 # at 23:59:59, instead of passing to 0:00, the time should be adjusted to be 1241 # 01:00 on September 2. 1242 1243 # From Steffen Thorsen (2013-02-15): 1244 # According to several news sources, Chile has extended DST this year, 1245 # they will end DST later and start DST earlier than planned. They 1246 # hope to save energy. The new end date is 2013-04-28 00:00 and new 1247 # start date is 2013-09-08 00:00.... 1248 # http://www.gob.cl/informa/2013/02/15/gobierno-anuncia-fechas-de-cambio-de-hora-para-el-ano-2013.htm 1249 1250 # From Jos Miguel Garrido (2014-02-19): 1251 # Today appeared in the Diario Oficial a decree amending the time change 1252 # dates to 2014. 1253 # DST End: last Saturday of April 2014 (Sun 27 Apr 2014 03:00 UTC) 1254 # DST Start: first Saturday of September 2014 (Sun 07 Sep 2014 04:00 UTC) 1255 # From Tim Parenti (2025-03-22): 1256 # Decreto 307 of 2014 of the Ministry of the Interior and Public Security, 1257 # promulgated 2014-01-30 and published 2014-02-19: 1258 # https://www.diariooficial.interior.gob.cl/media/2014/02/19/do-20140219.pdf#page=1 1259 # https://www.bcn.cl/leychile/navegar?idNorma=1059557 1260 1261 # From Eduardo Romero Urra (2015-03-03): 1262 # Today has been published officially that Chile will use the DST time 1263 # permanently until March 25 of 2017 1264 # From Tim Parenti (2025-03-22): 1265 # Decreto 106 of 2015 of the Ministry of the Interior and Public Security, 1266 # promulgated 2015-01-27 and published 2015-03-03: 1267 # https://www.diariooficial.interior.gob.cl/media/2015/03/03/do-20150303.pdf#page=1 1268 # https://www.bcn.cl/leychile/navegar?idNorma=1075157 1269 1270 # From Juan Correa (2016-03-18): 1271 # The decree regarding DST has been published in today's Official Gazette... 1272 # It does consider the second Saturday of May and August as the dates 1273 # for the transition; and it lists DST dates until 2019, but I think 1274 # this scheme will stick. 1275 # From Paul Eggert (2016-03-18): 1276 # The decree says transitions occur at 24:00; in practice this appears 1277 # to mean 24:00 mainland time, not 24:00 local time, so that Easter 1278 # Island is always two hours behind the mainland. 1279 # From Tim Parenti (2025-03-22): 1280 # Decreto 253 of 2016 of the Ministry of the Interior and Public Security, 1281 # promulgated 2016-03-16 and published 2016-03-18. 1282 # https://www.diariooficial.interior.gob.cl/media/2016/03/18/do-20160318.pdf#page=1 1283 # https://www.bcn.cl/leychile/navegar?idNorma=1088502 1284 1285 # From Juan Correa (2016-12-04): 1286 # Magallanes region ... will keep DST (UTC -3) all year round.... 1287 # 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 1288 # From Tim Parenti (2025-03-22), via Deborah Goldsmith (2017-01-19): 1289 # Decreto 1820 of 2016 of the Ministry of the Interior and Public Security, 1290 # promulgated 2016-12-02 and published 2017-01-17: 1291 # https://www.diariooficial.interior.gob.cl/publicaciones/2017/01/17/41660/01/1169626.pdf 1292 # https://www.bcn.cl/leychile/Navegar?idNorma=1099217 1293 # Model this as a change to standard offset effective 2016-12-04. 1294 1295 # From Juan Correa (2018-08-13): 1296 # As of moments ago, the Ministry of Energy in Chile has announced the new 1297 # schema for DST. ... Announcement in video (in Spanish): 1298 # https://twitter.com/MinEnergia/status/1029000399129374720 1299 # From Yonathan Dossow (2018-08-13): 1300 # The video says "first Saturday of September", we all know it means Sunday at 1301 # midnight. 1302 # From Tim Parenti (2018-08-13): 1303 # Translating the captions on the video at 0:44-0:55, "We want to announce as 1304 # Government that from 2019, Winter Time will be increased to 5 months, between 1305 # the first Saturday of April and the first Saturday of September." 1306 # At 2:08-2:20, "The Magallanes region will maintain its current time, as 1307 # decided by the citizens during 2017, but our Government will promote a 1308 # regional dialogue table to gather their opinion on this matter." 1309 # https://twitter.com/MinEnergia/status/1029009354001973248 1310 # "We will keep the new time policy unchanged for at least the next 4 years." 1311 # So we extend the new rules on Saturdays at 24:00 mainland time indefinitely. 1312 # From Tim Parenti (2025-03-22), via Juan Correa (2019-02-04): 1313 # Decreto 1286 of 2018 of the Ministry of the Interior and Public Security, 1314 # promulgated 2018-09-21 and published 2018-11-23: 1315 # https://www.diariooficial.interior.gob.cl/publicaciones/2018/11/23/42212/01/1498738.pdf 1316 # https://www.bcn.cl/leychile/Navegar?idNorma=1125760 1317 1318 # From Juan Correa (2022-04-02): 1319 # I found there was a decree published last Thursday that will keep 1320 # Magallanes region to UTC -3 "indefinitely". 1321 # From Tim Parenti (2025-03-22): 1322 # Decreto 143 of 2022 of the Ministry of the Interior and Public Security, 1323 # promulgated 2022-03-29 and published 2022-03-31: 1324 # https://www.diariooficial.interior.gob.cl/publicaciones/2022/03/31/43217-B/01/2108910.pdf 1325 # https://www.bcn.cl/leychile/Navegar?idNorma=1174342 1326 1327 # From Juan Correa (2022-08-09): 1328 # the Internal Affairs Ministry (Ministerio del Interior) informed DST 1329 # for America/Santiago will start on midnight of September 11th; 1330 # and will end on April 1st, 2023. Magallanes region (America/Punta_Arenas) 1331 # will keep UTC -3 "indefinitely"... This is because on September 4th 1332 # we will have a voting whether to approve a new Constitution. 1333 # 1334 # From Tim Parenti (2025-03-22), via Eduardo Romero Urra (2022-08-17): 1335 # Decreto 224 of 2022 of the Ministry of the Interior and Public Security, 1336 # promulgated 2022-07-14 and published 2022-08-13: 1337 # https://www.diariooficial.interior.gob.cl/publicaciones/2022/08/13/43327/01/2172567.pdf 1338 # https://www.bcn.cl/leychile/navegar?idNorma=1179983 1339 # 1340 # From Paul Eggert (2022-08-17): 1341 # Although the presidential decree stops at fall 2026, assume that 1342 # similar DST rules will continue thereafter. 1343 1344 # From Paul Eggert (2025-01-15): 1345 # Diario Regional Aysn's Sebastin Martel reports that 94% of Aysn 1346 # citizens polled in November favored changing the rules from 1347 # -04/-03-with-DST to -03 all year... 1348 # https://www.diarioregionalaysen.cl/noticia/actualidad/2024/12/presentan-decision-que-gano-la-votacion-sobre-el-cambio-del-huso-horario-en-aysen 1349 # 1350 # From Yonathan Dossow (2025-03-20): 1351 # [T]oday we have more confirmation of the change. [Aysn] region will keep 1352 # UTC-3 all year... 1353 # https://www.cnnchile.com/pais/region-de-aysen-mantendra-horario-de-verano-todo-el-ano_20250320/ 1354 # https://www.latercera.com/nacional/noticia/tras-consulta-ciudadana-region-de-aysen-mantendra-el-horario-de-verano-durante-todo-el-ano/ 1355 # https://x.com/min_interior/status/1902692504270672098 1356 # 1357 # From Tim Parenti (2025-03-22), via Eduardo Romero Urra (2025-03-20): 1358 # Decreto 93 of 2025 of the Ministry of the Interior and Public Security, 1359 # promulgated 2025-03-11 and published 2025-03-20: 1360 # https://www.diariooficial.interior.gob.cl/publicaciones/2025/03/20/44104/01/2624263.pdf 1361 # https://www.bcn.cl/leychile/Navegar?idNorma=1211955 1362 # Model this as a change to standard offset effective 2025-03-20. 1363 1364 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S 1365 Rule Chile 1927 1931 - Sep 1 0:00 1:00 - 1366 Rule Chile 1928 1932 - Apr 1 0:00 0 - 1367 Rule Chile 1968 only - Nov 3 4:00u 1:00 - 1368 Rule Chile 1969 only - Mar 30 3:00u 0 - 1369 Rule Chile 1969 only - Nov 23 4:00u 1:00 - 1370 Rule Chile 1970 only - Mar 29 3:00u 0 - 1371 Rule Chile 1971 only - Mar 14 3:00u 0 - 1372 Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 - 1373 Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 - 1374 Rule Chile 1973 only - Sep 30 4:00u 1:00 - 1375 Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 - 1376 Rule Chile 1987 only - Apr 12 3:00u 0 - 1377 Rule Chile 1988 1990 - Mar Sun>=9 3:00u 0 - 1378 Rule Chile 1988 1989 - Oct Sun>=9 4:00u 1:00 - 1379 Rule Chile 1990 only - Sep 16 4:00u 1:00 - 1380 Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 - 1381 Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 - 1382 Rule Chile 1997 only - Mar 30 3:00u 0 - 1383 Rule Chile 1998 only - Mar Sun>=9 3:00u 0 - 1384 Rule Chile 1998 only - Sep 27 4:00u 1:00 - 1385 Rule Chile 1999 only - Apr 4 3:00u 0 - 1386 Rule Chile 1999 2010 - Oct Sun>=9 4:00u 1:00 - 1387 Rule Chile 2000 2007 - Mar Sun>=9 3:00u 0 - 1388 # N.B.: the end of March 29 in Chile is March 30 in Universal time, 1389 # which is used below in specifying the transition. 1390 Rule Chile 2008 only - Mar 30 3:00u 0 - 1391 Rule Chile 2009 only - Mar Sun>=9 3:00u 0 - 1392 Rule Chile 2010 only - Apr Sun>=1 3:00u 0 - 1393 Rule Chile 2011 only - May Sun>=2 3:00u 0 - 1394 Rule Chile 2011 only - Aug Sun>=16 4:00u 1:00 - 1395 Rule Chile 2012 2014 - Apr Sun>=23 3:00u 0 - 1396 Rule Chile 2012 2014 - Sep Sun>=2 4:00u 1:00 - 1397 Rule Chile 2016 2018 - May Sun>=9 3:00u 0 - 1398 Rule Chile 2016 2018 - Aug Sun>=9 4:00u 1:00 - 1399 Rule Chile 2019 max - Apr Sun>=2 3:00u 0 - 1400 Rule Chile 2019 2021 - Sep Sun>=2 4:00u 1:00 - 1401 Rule Chile 2022 only - Sep Sun>=9 4:00u 1:00 - 1402 Rule Chile 2023 max - Sep Sun>=2 4:00u 1:00 - 1403 # IATA SSIM anomalies: (1992-02) says 1992-03-14; 1404 # (1996-09) says 1998-03-08. Ignore these. 1405 # Zone NAME STDOFF RULES FORMAT [UNTIL] 1406 Zone America/Santiago -4:42:45 - LMT 1890 1407 -4:42:45 - SMT 1910 Jan 10 # Santiago Mean Time 1408 -5:00 - %z 1916 Jul 1 1409 -4:42:45 - SMT 1918 Sep 10 1410 -4:00 - %z 1919 Jul 1 1411 -4:42:45 - SMT 1927 Sep 1 1412 -5:00 Chile %z 1932 Sep 1 1413 -4:00 - %z 1942 Jun 1 1414 -5:00 - %z 1942 Aug 1 1415 -4:00 - %z 1946 Jul 14 24:00 1416 -4:00 1:00 %z 1946 Aug 28 24:00 # central CL 1417 -5:00 1:00 %z 1947 Mar 31 24:00 1418 -5:00 - %z 1947 May 21 23:00 1419 -4:00 Chile %z 1420 Zone America/Coyhaique -4:48:16 - LMT 1890 1421 -4:42:45 - SMT 1910 Jan 10 1422 -5:00 - %z 1916 Jul 1 1423 -4:42:45 - SMT 1918 Sep 10 1424 -4:00 - %z 1919 Jul 1 1425 -4:42:45 - SMT 1927 Sep 1 1426 -5:00 Chile %z 1932 Sep 1 1427 -4:00 - %z 1942 Jun 1 1428 -5:00 - %z 1942 Aug 1 1429 -4:00 - %z 1946 Aug 28 24:00 1430 -5:00 1:00 %z 1947 Mar 31 24:00 1431 -5:00 - %z 1947 May 21 23:00 1432 -4:00 Chile %z 2025 Mar 20 1433 -3:00 - %z 1434 Zone America/Punta_Arenas -4:43:40 - LMT 1890 1435 -4:42:45 - SMT 1910 Jan 10 1436 -5:00 - %z 1916 Jul 1 1437 -4:42:45 - SMT 1918 Sep 10 1438 -4:00 - %z 1919 Jul 1 1439 -4:42:45 - SMT 1927 Sep 1 1440 -5:00 Chile %z 1932 Sep 1 1441 -4:00 - %z 1942 Jun 1 1442 -5:00 - %z 1942 Aug 1 1443 -4:00 - %z 1946 Aug 28 24:00 1444 -5:00 1:00 %z 1947 Mar 31 24:00 1445 -5:00 - %z 1947 May 21 23:00 1446 -4:00 Chile %z 2016 Dec 4 1447 -3:00 - %z 1448 Zone Pacific/Easter -7:17:28 - LMT 1890 1449 -7:17:28 - EMT 1932 Sep # Easter Mean Time 1450 -7:00 Chile %z 1982 Mar 14 3:00u # Easter Time 1451 -6:00 Chile %z 1452 # 1453 # Salas y Gmez Island is uninhabited. 1454 # Other Chilean locations, including Juan Fernndez Is, Desventuradas Is, 1455 # and Antarctic bases, are like America/Santiago. 1456 1457 # Antarctic base using South American rules 1458 # (See the file 'antarctica' for more.) 1459 # 1460 # Palmer, Anvers Island, since 1965 (moved 2 miles in 1968) 1461 # 1462 # From Ethan Dicks (1996-10-06): 1463 # It keeps the same time as Punta Arenas, Chile, because, just like us 1464 # and the South Pole, that's the other end of their supply line.... 1465 # I verified with someone who was there that since 1980, 1466 # Palmer has followed Chile. Prior to that, before the Falklands War, 1467 # Palmer used to be supplied from Argentina. 1468 # 1469 # Zone NAME STDOFF RULES FORMAT [UNTIL] 1470 Zone Antarctica/Palmer 0 - -00 1965 1471 -4:00 Arg %z 1969 Oct 5 1472 -3:00 Arg %z 1982 May 1473 -4:00 Chile %z 2016 Dec 4 1474 -3:00 - %z 1475 1476 # Colombia 1477 1478 # Milne gives 4:56:16.4 for Bogot time in 1899. He writes, 1479 # "A variation of fifteen minutes in the public clocks of Bogota is not rare." 1480 1481 # From Alois Treindl (2022-11-10): 1482 # End of time change in Colombia 1993 ... should be 6 February 24h ... 1483 # DECRETO 267 DE 1993 1484 # https://www.suin-juriscol.gov.co/viewDocument.asp?ruta=Decretos/1061335 1485 1486 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S 1487 Rule CO 1992 only - May 3 0:00 1:00 - 1488 Rule CO 1993 only - Feb 6 24:00 0 - 1489 # Zone NAME STDOFF RULES FORMAT [UNTIL] 1490 #STDOFF -4:56:16.4 1491 Zone America/Bogota -4:56:16 - LMT 1884 Mar 13 1492 -4:56:16 - BMT 1914 Nov 23 # Bogot Mean Time 1493 -5:00 CO %z 1494 # Malpelo, Providencia, San Andres 1495 # no information; probably like America/Bogota 1496 1497 # Curaao 1498 # Zone NAME STDOFF RULES FORMAT [UNTIL] 1499 Zone America/Curacao -4:35:47 - LMT 1912 Feb 12 # Willemstad 1500 -4:30 - -0430 1965 1501 -4:00 - AST 1502 1503 Link America/Curacao America/Kralendijk 1504 Link America/Curacao America/Lower_Princes 1505 # Ecuador 1506 # 1507 # Milne says the Central and South American Telegraph Company used -5:24:15. 1508 # 1509 # From Alois Treindl (2016-12-15): 1510 # https://www.elcomercio.com/actualidad/hora-sixto-1993.html 1511 # ... Whether the law applied also to Galpagos, I do not know. 1512 # From Paul Eggert (2016-12-15): 1513 # https://www.elcomercio.com/afull/modificacion-husohorario-ecuador-presidentes-decreto.html 1514 # This says President Sixto Durn Balln signed decree No. 285, which 1515 # established DST from 1992-11-28 to 1993-02-05; it does not give transition 1516 # times. The people called it "hora de Sixto" ("Sixto hour"). The change did 1517 # not go over well; a popular song "Qu hora es" by Jaime Guevara had lyrics 1518 # that included "Amaneca en mitad de la noche, los guaguas iban a clase sin 1519 # sol" ("It was dawning in the middle of the night, the buses went to class 1520 # without sun"). Although Balln's campaign slogan was "Ni un paso atrs" 1521 # (Not one step back), the clocks went back in 1993 and the experiment was not 1522 # repeated. For now, assume transitions were at 00:00 local time country-wide. 1523 # 1524 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S 1525 Rule Ecuador 1992 only - Nov 28 0:00 1:00 - 1526 Rule Ecuador 1993 only - Feb 5 0:00 0 - 1527 # 1528 # Zone NAME STDOFF RULES FORMAT [UNTIL] 1529 Zone America/Guayaquil -5:19:20 - LMT 1890 1530 -5:14:00 - QMT 1931 # Quito Mean Time 1531 -5:00 Ecuador %z 1532 Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno 1533 -5:00 - %z 1986 1534 -6:00 Ecuador %z 1535 1536 # Falklands 1537 1538 # From Paul Eggert (2006-03-22): 1539 # Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except 1540 # the IATA gives 1996-09-08. Go with Shanks & Pottenger. 1541 1542 # From Falkland Islands Government Office, London (2001-01-22) 1543 # via Jesper Nrgaard: 1544 # ... the clocks revert back to Local Mean Time at 2 am on Sunday 15 1545 # April 2001 and advance one hour to summer time at 2 am on Sunday 2 1546 # September. It is anticipated that the clocks will revert back at 2 1547 # am on Sunday 21 April 2002 and advance to summer time at 2 am on 1548 # Sunday 1 September. 1549 1550 # From Rives McDow (2001-02-13): 1551 # 1552 # I have communicated several times with people there, and the last 1553 # time I had communications that was helpful was in 1998. Here is 1554 # what was said then: 1555 # 1556 # "The general rule was that Stanley used daylight saving and the Camp 1557 # did not. However for various reasons many people in the Camp have 1558 # started to use daylight saving (known locally as 'Stanley Time') 1559 # There is no rule as to who uses daylight saving - it is a matter of 1560 # personal choice and so it is impossible to draw a map showing who 1561 # uses it and who does not. Any list would be out of date as soon as 1562 # it was produced. This year daylight saving ended on April 18/19th 1563 # and started again on September 12/13th. I do not know what the rule 1564 # is, but can find out if you like. We do not change at the same time 1565 # as UK or Chile." 1566 # 1567 # I did have in my notes that the rule was "Second Saturday in Sep at 1568 # 0:00 until third Saturday in Apr at 0:00". I think that this does 1569 # not agree in some cases with Shanks; is this true? 1570 # 1571 # Also, there is no mention in the list that some areas in the 1572 # Falklands do not use DST. I have found in my communications there 1573 # that these areas are on the western half of East Falkland and all of 1574 # West Falkland. Stanley is the only place that consistently observes 1575 # DST. Again, as in other places in the world, the farmers don't like 1576 # it. West Falkland is almost entirely sheep farmers. 1577 # 1578 # I know one lady there that keeps a list of which farm keeps DST and 1579 # which doesn't each year. She runs a shop in Stanley, and says that 1580 # the list changes each year. She uses it to communicate to her 1581 # customers, catching them when they are home for lunch or dinner. 1582 1583 # From Paul Eggert (2001-03-05): 1584 # For now, we'll just record the time in Stanley, since we have no 1585 # better info. 1586 1587 # From Steffen Thorsen (2011-04-01): 1588 # The Falkland Islands will not turn back clocks this winter, but stay on 1589 # daylight saving time. 1590 # 1591 # One source: 1592 # http://www.falklandnews.com/public/story.cfm?get=5914&source=3 1593 # 1594 # We have gotten this confirmed by a clerk of the legislative assembly: 1595 # Normally the clocks revert to Local Mean Time (UTC/GMT -4 hours) on the 1596 # third Sunday of April at 0200hrs and advance to Summer Time (UTC/GMT -3 1597 # hours) on the first Sunday of September at 0200hrs. 1598 # 1599 # IMPORTANT NOTE: During 2011, on a trial basis, the Falkland Islands 1600 # will not revert to local mean time, but clocks will remain on Summer 1601 # time (UTC/GMT - 3 hours) throughout the whole of 2011. Any long term 1602 # change to local time following the trial period will be notified. 1603 # 1604 # From Andrew Newman (2012-02-24) 1605 # A letter from Justin McPhee, Chief Executive, 1606 # Cable & Wireless Falkland Islands (dated 2012-02-22) 1607 # states... 1608 # The current Atlantic/Stanley entry under South America expects the 1609 # clocks to go back to standard Falklands Time (FKT) on the 15th April. 1610 # The database entry states that in 2011 Stanley was staying on fixed 1611 # summer time on a trial basis only. FIG need to contact IANA and/or 1612 # the maintainers of the database to inform them we're adopting 1613 # the same policy this year and suggest recommendations for future years. 1614 # 1615 # For now we will assume permanent -03 for the Falklands 1616 # until advised differently (to apply for 2012 and beyond, after the 2011 1617 # experiment was apparently successful.) 1618 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S 1619 Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 - 1620 Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 - 1621 Rule Falk 1939 only - Oct 1 0:00 1:00 - 1622 Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 - 1623 Rule Falk 1943 only - Jan 1 0:00 0 - 1624 Rule Falk 1983 only - Sep lastSun 0:00 1:00 - 1625 Rule Falk 1984 1985 - Apr lastSun 0:00 0 - 1626 Rule Falk 1984 only - Sep 16 0:00 1:00 - 1627 Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 - 1628 Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 - 1629 Rule Falk 2001 2010 - Apr Sun>=15 2:00 0 - 1630 Rule Falk 2001 2010 - Sep Sun>=1 2:00 1:00 - 1631 # Zone NAME STDOFF RULES FORMAT [UNTIL] 1632 Zone Atlantic/Stanley -3:51:24 - LMT 1890 1633 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time 1634 -4:00 Falk %z 1983 May 1635 -3:00 Falk %z 1985 Sep 15 1636 -4:00 Falk %z 2010 Sep 5 2:00 1637 -3:00 - %z 1638 1639 # French Guiana 1640 # For the 1911/1912 establishment of standard time in French possessions, see: 1641 # Socit Franaise de Physique, Recueil de constantes physiques (1913), 1642 # page 752, 18b. 1643 # Zone NAME STDOFF RULES FORMAT [UNTIL] 1644 Zone America/Cayenne -3:29:20 - LMT 1911 Jul 1 1645 -4:00 - %z 1967 Oct 1646 -3:00 - %z 1647 1648 # Guyana 1649 1650 # From P Chan (2020-11-27): 1651 # https://books.google.com/books?id=5-5CAQAAMAAJ&pg=SA1-PA547 1652 # The Official Gazette of British Guiana. (New Series.) Vol. XL. July to 1653 # December, 1915, p 1547, lists as several notes: 1654 # "Local Mean Time 3 hours 52 mins. 39 secs. slow of Greenwich Mean Time 1655 # (Georgetown.) From 1st August, 1911, British Guiana Standard Mean Time 4 1656 # hours slow of Greenwich Mean Time, by notice in Official Gazette on 1st July, 1657 # 1911. From 1st March, 1915, British Guiana Standard Mean Time 3 hours 45 1658 # mins. 0 secs. slow of Greenwich Mean Time, by notice in Official Gazette on 1659 # 23rd January, 1915." 1660 # 1661 # https://parliament.gov.gy/documents/acts/10923-act_no._27_of_1975_-_interpretation_and_general_clauses_(amendment)_act_1975.pdf 1662 # Interpretation and general clauses (Amendment) Act 1975 (Act No. 27 of 1975) 1663 # [dated 1975-07-31] 1664 # "This Act...shall come into operation on 1st August, 1975." 1665 # "...where any expression of time occurs...the time referred to shall signify 1666 # the standard time of Guyana which shall be three hours behind Greenwich Mean 1667 # Time." 1668 # 1669 # Circular No. 10/1992 dated 1992-03-20 1670 # https://dps.gov.gy/wp-content/uploads/2018/12/1992-03-20-Circular-010.pdf 1671 # "...cabinet has decided that with effect from Sunday 29th March, 1992, Guyana 1672 # Standard Time would be re-established at 01:00 hours by adjusting the hands 1673 # of the clock back to 24:00 hours." 1674 # Legislated in the Interpretation and general clauses (Amendment) Act 1992 1675 # (Act No. 6 of 1992) [passed 1992-03-27, published 1992-04-18] 1676 # https://parliament.gov.gy/documents/acts/5885-6_of_1992_interpretation_and_general_clauses_(amendment)_act_1992.pdf 1677 1678 # Zone NAME STDOFF RULES FORMAT [UNTIL] 1679 Zone America/Guyana -3:52:39 - LMT 1911 Aug 1 # Georgetown 1680 -4:00 - %z 1915 Mar 1 1681 -3:45 - %z 1975 Aug 1 1682 -3:00 - %z 1992 Mar 29 1:00 1683 -4:00 - %z 1684 1685 # Paraguay 1686 # 1687 # From Paul Eggert (2006-03-22): 1688 # Shanks & Pottenger say that spring transitions are 01:00 -> 02:00, 1689 # and autumn transitions are 00:00 -> 23:00. Go with pre-1999 1690 # editions of Shanks, and with the IATA, who say transitions occur at 00:00. 1691 # 1692 # From Waldemar Villamayor-Venialbo (2013-09-20): 1693 # No time of the day is established for the adjustment, so people normally 1694 # adjust their clocks at 0 hour of the given dates. 1695 # 1696 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S 1697 Rule Para 1975 1988 - Oct 1 0:00 1:00 - 1698 Rule Para 1975 1978 - Mar 1 0:00 0 - 1699 Rule Para 1979 1991 - Apr 1 0:00 0 - 1700 Rule Para 1989 only - Oct 22 0:00 1:00 - 1701 Rule Para 1990 only - Oct 1 0:00 1:00 - 1702 Rule Para 1991 only - Oct 6 0:00 1:00 - 1703 Rule Para 1992 only - Mar 1 0:00 0 - 1704 Rule Para 1992 only - Oct 5 0:00 1:00 - 1705 Rule Para 1993 only - Mar 31 0:00 0 - 1706 Rule Para 1993 1995 - Oct 1 0:00 1:00 - 1707 Rule Para 1994 1995 - Feb lastSun 0:00 0 - 1708 Rule Para 1996 only - Mar 1 0:00 0 - 1709 # IATA SSIM (2000-02) says 1999-10-10; ignore this for now. 1710 # From Steffen Thorsen (2000-10-02): 1711 # I have three independent reports that Paraguay changed to DST this Sunday 1712 # (10-01). 1713 # 1714 # Translated by Gwillim Law (2001-02-27) from 1715 # Noticias, a daily paper in Asuncin, Paraguay (2000-10-01): 1716 # http://www.diarionoticias.com.py/011000/nacional/naciona1.htm 1717 # Starting at 0:00 today, the clock will be set forward 60 minutes, in 1718 # fulfillment of Decree No. 7,273 of the Executive Power.... The time change 1719 # system has been operating for several years. Formerly there was a separate 1720 # decree each year; the new law has the same effect, but permanently. Every 1721 # year, the time will change on the first Sunday of October; likewise, the 1722 # clock will be set back on the first Sunday of March. 1723 # 1724 Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 - 1725 # IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger. 1726 Rule Para 1997 only - Feb lastSun 0:00 0 - 1727 # Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but 1728 # (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27). 1729 Rule Para 1998 2001 - Mar Sun>=1 0:00 0 - 1730 # From Rives McDow (2002-02-28): 1731 # A decree was issued in Paraguay (No. 16350) on 2002-02-26 that changed the 1732 # dst method to be from the first Sunday in September to the first Sunday in 1733 # April. 1734 Rule Para 2002 2004 - Apr Sun>=1 0:00 0 - 1735 Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 - 1736 # 1737 # From Jesper Nrgaard Welen (2005-01-02): 1738 # There are several sources that claim that Paraguay made 1739 # a timezone rule change in autumn 2004. 1740 # From Steffen Thorsen (2005-01-05): 1741 # Decree 1,867 (2004-03-05) 1742 # From Carlos Ral Perasso via Jesper Nrgaard Welen (2006-10-13) 1743 # http://www.presidencia.gov.py/decretos/D1867.pdf 1744 Rule Para 2004 2009 - Oct Sun>=15 0:00 1:00 - 1745 Rule Para 2005 2009 - Mar Sun>=8 0:00 0 - 1746 # From Carlos Ral Perasso (2010-02-18): 1747 # By decree number 3958 issued yesterday 1748 # http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf 1749 # Paraguay changes its DST schedule, postponing the March rule to April and 1750 # modifying the October date. The decree reads: 1751 # ... 1752 # Art. 1. It is hereby established that from the second Sunday of the month of 1753 # April of this year (2010), the official time is to be set back 60 minutes, 1754 # and that on the first Sunday of the month of October, it is to be set 1755 # forward 60 minutes, in all the territory of the Paraguayan Republic. 1756 # ... 1757 Rule Para 2010 2024 - Oct Sun>=1 0:00 1:00 - 1758 Rule Para 2010 2012 - Apr Sun>=8 0:00 0 - 1759 # 1760 # From Steffen Thorsen (2013-03-07): 1761 # Paraguay will end DST on 2013-03-24 00:00.... 1762 # http://www.ande.gov.py/interna.php?id=1075 1763 # 1764 # From Carlos Ral Perasso (2013-03-15): 1765 # The change in Paraguay is now final. Decree number 10780 1766 # http://www.presidencia.gov.py/uploads/pdf/presidencia-3b86ff4b691c79d4f5927ca964922ec74772ce857c02ca054a52a37b49afc7fb.pdf 1767 # From Carlos Ral Perasso (2014-02-28): 1768 # Decree 1264 can be found at: 1769 # http://www.presidencia.gov.py/archivos/documentos/DECRETO1264_ey9r8zai.pdf 1770 # 1771 # From Paul Eggert (2023-07-26): 1772 # Transition dates are now set by Law No. 7115, not by presidential decree. 1773 # https://www.abc.com.py/politica/2023/07/12/promulgacion-el-cambio-de-hora-sera-por-ley/ 1774 # From Carlos Ral Perasso (2023-07-27): 1775 # http://silpy.congreso.gov.py/descarga/ley-144138 1776 Rule Para 2013 2024 - Mar Sun>=22 0:00 0 - 1777 # 1778 # From Heitor David Pinto (2024-09-24): 1779 # Today the Congress of Paraguay passed a bill to observe UTC-3 permanently.... 1780 # The text of the bill says that it would enter into force on the first 1781 # Sunday in October 2024, the same date currently scheduled to start DST.... 1782 # https://silpy.congreso.gov.py/web/expediente/132531 1783 # (2024-10-14): 1784 # The president approved the law on 11 October 2024, 1785 # and it was officially published on 14 October 2024. 1786 # https://www.gacetaoficial.gov.py/index/detalle_publicacion/89723 1787 # The text of the law says that it enters into force on the first 1788 # Sunday in October 2024 (6 October 2024). But the constitution 1789 # prohibits retroactive effect, and the civil code says that laws 1790 # enter into force on the day after their publication or on the day 1791 # that they specify, and it also says that they don't have retroactive 1792 # effect. So I think that the time change on 6 October 2024 should 1793 # still be considered as DST according to the previous law, and 1794 # permanently UTC-3 from 15 October 2024 according to the new law.... 1795 # https://www.constituteproject.org/constitution/Paraguay_2011 1796 # https://www.oas.org/dil/esp/codigo_civil_paraguay.pdf 1797 1798 # Zone NAME STDOFF RULES FORMAT [UNTIL] 1799 Zone America/Asuncion -3:50:40 - LMT 1890 1800 -3:50:40 - AMT 1931 Oct 10 # Asuncin Mean Time 1801 -4:00 - %z 1972 Oct 1802 -3:00 - %z 1974 Apr 1803 -4:00 Para %z 2024 Oct 15 1804 -3:00 - %z 1805 1806 # Peru 1807 # 1808 # From Evelyn C. Leeper via Mark Brader (2003-10-26) 1809 # <news:xrGmb.39935$gA1.13896113 (a] news4.srv.hcvlny.cv.net>: 1810 # When we were in Peru in 1985-1986, they apparently switched over 1811 # sometime between December 29 and January 3 while we were on the Amazon. 1812 # 1813 # From Paul Eggert (2006-03-22): 1814 # Shanks & Pottenger don't have this transition. Assume 1986 was like 1987. 1815 1816 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S 1817 Rule Peru 1938 only - Jan 1 0:00 1:00 - 1818 Rule Peru 1938 only - Apr 1 0:00 0 - 1819 Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 - 1820 Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 - 1821 Rule Peru 1986 1987 - Jan 1 0:00 1:00 - 1822 Rule Peru 1986 1987 - Apr 1 0:00 0 - 1823 Rule Peru 1990 only - Jan 1 0:00 1:00 - 1824 Rule Peru 1990 only - Apr 1 0:00 0 - 1825 # IATA is ambiguous for 1993/1995; go with Shanks & Pottenger. 1826 Rule Peru 1994 only - Jan 1 0:00 1:00 - 1827 Rule Peru 1994 only - Apr 1 0:00 0 - 1828 # Zone NAME STDOFF RULES FORMAT [UNTIL] 1829 Zone America/Lima -5:08:12 - LMT 1890 1830 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time? 1831 -5:00 Peru %z 1832 1833 # South Georgia 1834 # Zone NAME STDOFF RULES FORMAT [UNTIL] 1835 Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken 1836 -2:00 - %z 1837 1838 # South Sandwich Is 1839 # uninhabited; scientific personnel have wintered 1840 1841 # Suriname 1842 # Zone NAME STDOFF RULES FORMAT [UNTIL] 1843 Zone America/Paramaribo -3:40:40 - LMT 1911 1844 -3:40:52 - PMT 1935 # Paramaribo Mean Time 1845 -3:40:36 - PMT 1945 Oct # The capital moved? 1846 -3:30 - %z 1984 Oct 1847 -3:00 - %z 1848 1849 # Trinidad and Tobago 1850 # Zone NAME STDOFF RULES FORMAT [UNTIL] 1851 Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2 1852 -4:00 - AST 1853 1854 Link America/Port_of_Spain America/Marigot 1855 Link America/Port_of_Spain America/St_Barthelemy 1856 # Uruguay 1857 # From Paul Eggert (1993-11-18): 1858 # Uruguay wins the prize for the strangest peacetime manipulation of the rules. 1859 # 1860 # From Tim Parenti (2018-02-20), per Jeremie Bonjour (2018-01-31) and Michael 1861 # Deckers (2018-02-20): 1862 # ... At least they kept good records... 1863 # 1864 # http://www.armada.mil.uy/ContenidosPDFs/sohma/web/almanaque/almanaque_2018.pdf#page=36 1865 # Page 36 of Almanaque 2018, published by the Oceanography, Hydrography, and 1866 # Meteorology Service of the Uruguayan Navy, seems to give many transitions 1867 # with greater clarity than we've had before. It directly references many laws 1868 # and decrees which are, in turn, referenced below. They can be viewed in the 1869 # public archives of the Diario Oficial (in Spanish) at 1870 # http://www.impo.com.uy/diariooficial/ 1871 # 1872 # Ley No. 3920 of 1908-06-10 placed the determination of legal time under the 1873 # auspices of the National Institute for the Prediction of Time. It is unclear 1874 # exactly what offset was used during this period, though Ley No. 7200 of 1875 # 1920-04-23 used the Observatory of the National Meteorological Institute in 1876 # Montevideo (34 54' 33" S, 56 12' 45" W) as its reference meridian, 1877 # retarding legal time by 15 minutes 9 seconds from 1920-04-30 24:00, 1878 # resulting in UT-04. Assume the corresponding LMT of UT-03:44:51 (given on 1879 # page 725 of the Proceedings of the Second Pan-American Scientific Congress, 1880 # 1915-1916) was in use, and merely became official from 1908-06-10. 1881 # https://www.impo.com.uy/diariooficial/1908/06/18/12 1882 # https://www.impo.com.uy/diariooficial/1920/04/27/9 1883 # 1884 # Ley No. 7594 of 1923-06-28 specified legal time as Observatory time advanced 1885 # by 44 minutes 51 seconds (UT-03) "from 30 September to 31 March", and by 14 1886 # minutes 51 seconds (UT-03:30) "the rest of the year"; a message from the 1887 # National Council of Administration the same day, published directly below the 1888 # law in the Diario Oficial, specified the first transition to be 1923-09-30 1889 # 24:00. This effectively established standard time at UT-03:30 with 30 1890 # minutes DST. Assume transitions at 24:00 on the specified days until Ley No. 1891 # 7919 of 1926-03-05 ended this arrangement, repealing all "laws and other 1892 # provisions which oppose" it, resulting in year-round UT-03:30; a Resolucin 1893 # of 1926-03-11 puts the final transition at 1926-03-31 24:00, the same as it 1894 # would have been under the previous law. 1895 # https://www.impo.com.uy/diariooficial/1923/07/02/2 1896 # https://www.impo.com.uy/diariooficial/1926/03/10/2 1897 # https://www.impo.com.uy/diariooficial/1926/03/18/2 1898 # 1899 # Rule NAME FROM TO - IN ON AT SAVE LETTER/S 1900 Rule Uruguay 1923 1925 - Oct 1 0:00 0:30 - 1901 Rule Uruguay 1924 1926 - Apr 1 0:00 0 - 1902 # From Tim Parenti (2018-02-15): 1903 # http://www.impo.com.uy/diariooficial/1933/10/27/6 1904 # 1905 # It appears Ley No. 9122 of 1933 was never published as such in the Diario 1906 # Oficial, but instead appeared as Document 26 in the Diario on Friday 1907 # 1933-10-27 as a decree made Monday 1933-10-23 and filed under the Ministry of 1908 # National Defense. It reinstituted a DST of 30 minutes (to UT-03) "from the 1909 # last Sunday of October...until the last Saturday of March." In accordance 1910 # with this provision, the first transition was explicitly specified in Article 1911 # 2 of the decree as Saturday 1933-10-28 at 24:00; that is, Sunday 1933-10-29 1912 # at 00:00. Assume transitions at 00:00 Sunday throughout. 1913 # 1914 # Departing from the matter-of-fact nature of previous timekeeping laws, the 1915 # 1933 decree "consider[s] the advantages of...the advance of legal time": 1916 # 1917 # "Whereas: The measure adopted by almost all nations at the time of the last 1918 # World War still persists in North America and Europe, precisely because of 1919 # the economic, hygienic, and social advantages derived from such an 1920 # emergency measure... 1921 # 1922 # Whereas: The advance of the legal time during the summer seasons, by 1923 # displacing social activity near sunrise, favors the citizen populations 1924 # and especially the society that creates and works..." 1925 # 1926 # It further specified that "necessary measures" be taken to ensure that 1927 # "public spectacles finish, in general, before [01:00]." 1928 Rule Uruguay 1933 1938 - Oct lastSun 0:00 0:30 - 1929 Rule Uruguay 1934 1941 - Mar lastSat 24:00 0 - 1930 # From Tim Parenti (2018-02-15): 1931 # Most of the Rules below, and their contemporaneous Zone lines, have been 1932 # updated simply to match the Almanaque 2018. Although the document does not 1933 # list exact transition times, midnight transitions were already present in our 1934 # data here for all transitions through 2004-09, and this is both consistent 1935 # with prior transitions and verified in several decrees marked below between 1936 # 1939-09 and 2004-09, wherein the relevant text was typically of the form: 1937 # 1938 # "From 0 hours on [date], the legal time of the entire Republic will be... 1939 # 1940 # In accordance with [the preceding], on [previous date] at 24 hours, all 1941 # clocks throughout the Republic will be [advanced/retarded] by..." 1942 # 1943 # It is possible that there is greater specificity to be found for the Rules 1944 # below, but it is buried in no fewer than 40 different decrees individually 1945 # referenced by the Almanaque for the period from 1939-09 to 2014-09. 1946 # Four-fifths of these were promulgated less than two weeks before taking 1947 # effect; more than half within a week and none more than 5 weeks. Only the 1948 # handful with comments below have been checked with any thoroughness. 1949 Rule Uruguay 1939 only - Oct 1 0:00 0:30 - 1950 Rule Uruguay 1940 only - Oct 27 0:00 0:30 - 1951 # From Tim Parenti (2018-02-15): 1952 # Decreto 1145 of the Ministry of National Defense, dated 1941-07-26, specified 1953 # UT-03 from Friday 1941-08-01 00:00, citing an "urgent...need to save fuel". 1954 # http://www.impo.com.uy/diariooficial/1941/08/04/1 1955 Rule Uruguay 1941 only - Aug 1 0:00 0:30 - 1956 # From Tim Parenti (2018-02-15): 1957 # Decreto 1866 of the Ministry of National Defense, dated 1942-12-09, specified 1958 # further advancement (to UT-02:30) from Sunday 1942-12-13 24:00. Since clocks 1959 # never went back to UT-03:30 thereafter, this is modeled as advancing standard 1960 # time by 30 minutes to UT-03, while retaining 30 minutes of DST. 1961 # http://www.impo.com.uy/diariooficial/1942/12/16/3 1962 Rule Uruguay 1942 only - Dec 14 0:00 0:30 - 1963 Rule Uruguay 1943 only - Mar 14 0:00 0 - 1964 Rule Uruguay 1959 only - May 24 0:00 0:30 - 1965 Rule Uruguay 1959 only - Nov 15 0:00 0 - 1966 Rule Uruguay 1960 only - Jan 17 0:00 1:00 - 1967 Rule Uruguay 1960 only - Mar 6 0:00 0 - 1968 Rule Uruguay 1965 only - Apr 4 0:00 1:00 - 1969 Rule Uruguay 1965 only - Sep 26 0:00 0 - 1970 # From Tim Parenti (2018-02-15): 1971 # Decreto 321/968 of 1968-05-25, citing emergency drought measures decreed the 1972 # day before, brought clocks forward 30 minutes from Monday 1968-05-27 00:00. 1973 # http://www.impo.com.uy/diariooficial/1968/05/30/5 1974 Rule Uruguay 1968 only - May 27 0:00 0:30 - 1975 Rule Uruguay 1968 only - Dec 1 0:00 0 - 1976 # From Tim Parenti (2018-02-15): 1977 # Decreto 188/970 of 1970-04-23 instituted restrictions on electricity 1978 # consumption "as a consequence of the current rainfall regime in the country". 1979 # Articles 13 and 14 advanced clocks by an hour from Saturday 1970-04-25 00:00. 1980 # http://www.impo.com.uy/diariooficial/1970/04/29/4 1981 Rule Uruguay 1970 only - Apr 25 0:00 1:00 - 1982 Rule Uruguay 1970 only - Jun 14 0:00 0 - 1983 Rule Uruguay 1972 only - Apr 23 0:00 1:00 - 1984 Rule Uruguay 1972 only - Jul 16 0:00 0 - 1985 # From Tim Parenti (2018-02-15): 1986 # Decreto 29/974 of 1974-01-11, citing "the international rise in the price of 1987 # oil", advanced clocks by 90 minutes (to UT-01:30). Decreto 163/974 of 1988 # 1974-03-04 returned 60 of those minutes (to UT-02:30), and the remaining 30 1989 # minutes followed in Decreto 679/974 of 1974-08-29. 1990 # http://www.impo.com.uy/diariooficial/1974/01/22/11 1991 # http://www.impo.com.uy/diariooficial/1974/03/14/3 1992 # http://www.impo.com.uy/diariooficial/1974/09/04/6 1993 Rule Uruguay 1974 only - Jan 13 0:00 1:30 - 1994 Rule Uruguay 1974 only - Mar 10 0:00 0:30 - 1995 Rule Uruguay 1974 only - Sep 1 0:00 0 - 1996 Rule Uruguay 1974 only - Dec 22 0:00 1:00 - 1997 Rule Uruguay 1975 only - Mar 30 0:00 0 - 1998 Rule Uruguay 1976 only - Dec 19 0:00 1:00 - 1999 Rule Uruguay 1977 only - Mar 6 0:00 0 - 2000 Rule Uruguay 1977 only - Dec 4 0:00 1:00 - 2001 Rule Uruguay 1978 1979 - Mar Sun>=1 0:00 0 - 2002 Rule Uruguay 1978 only - Dec 17 0:00 1:00 - 2003 Rule Uruguay 1979 only - Apr 29 0:00 1:00 - 2004 Rule Uruguay 1980 only - Mar 16 0:00 0 - 2005 # From Tim Parenti (2018-02-15): 2006 # Decreto 725/987 of 1987-12-04 cited "better use of national tourist 2007 # attractions" to advance clocks one hour from Monday 1987-12-14 00:00. 2008 # http://www.impo.com.uy/diariooficial/1988/01/25/1 2009 Rule Uruguay 1987 only - Dec 14 0:00 1:00 - 2010 Rule Uruguay 1988 only - Feb 28 0:00 0 - 2011 Rule Uruguay 1988 only - Dec 11 0:00 1:00 - 2012 Rule Uruguay 1989 only - Mar 5 0:00 0 - 2013 Rule Uruguay 1989 only - Oct 29 0:00 1:00 - 2014 Rule Uruguay 1990 only - Feb 25 0:00 0 - 2015 # From Tim Parenti (2018-02-15), per Paul Eggert (1999-11-04): 2016 # IATA agrees as below for 1990-10 through 1993-02. Per Almanaque 2018, the 2017 # 1992/1993 season appears to be the first in over half a century where DST 2018 # both began and ended pursuant to the same decree. 2019 Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 - 2020 Rule Uruguay 1991 1992 - Mar Sun>=1 0:00 0 - 2021 Rule Uruguay 1992 only - Oct 18 0:00 1:00 - 2022 Rule Uruguay 1993 only - Feb 28 0:00 0 - 2023 # From Eduardo Cota (2004-09-20): 2024 # The Uruguayan government has decreed a change in the local time.... 2025 # From Tim Parenti (2018-02-15): 2026 # Decreto 328/004 of 2004-09-15. 2027 # http://www.impo.com.uy/diariooficial/2004/09/23/documentos.pdf#page=1 2028 Rule Uruguay 2004 only - Sep 19 0:00 1:00 - 2029 # From Steffen Thorsen (2005-03-11): 2030 # Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to 2031 # save energy ... it was postponed two weeks.... 2032 # From Tim Parenti (2018-02-15): 2033 # This 2005 postponement is not in Almanaque 2018. Go with the contemporaneous 2034 # reporting, which is confirmed by Decreto 107/005 of 2005-03-10 amending 2035 # Decreto 328/004: 2036 # http://www.impo.com.uy/diariooficial/2005/03/15/documentos.pdf#page=1 2037 # The original decree specified a transition of 2005-03-12 24:00, but the new 2038 # one specified 2005-03-27 02:00. 2039 Rule Uruguay 2005 only - Mar 27 2:00 0 - 2040 # From Eduardo Cota (2005-09-27): 2041 # ...from 2005-10-09 at 02:00 local time, until 2006-03-12 at 02:00 local time, 2042 # official time in Uruguay will be at GMT -2. 2043 # From Tim Parenti (2018-02-15): 2044 # Decreto 318/005 of 2005-09-19. 2045 # http://www.impo.com.uy/diariooficial/2005/09/23/documentos.pdf#page=1 2046 Rule Uruguay 2005 only - Oct 9 2:00 1:00 - 2047 Rule Uruguay 2006 2015 - Mar Sun>=8 2:00 0 - 2048 # From Tim Parenti (2018-02-15), per Jesper Nrgaard Welen (2006-09-06): 2049 # Decreto 311/006 of 2006-09-04 established regular DST from the first Sunday 2050 # of October at 02:00 through the second Sunday of March at 02:00. Almanaque 2051 # 2018 appears to have a few typoed dates through this period; ignore them. 2052 # http://www.impo.com.uy/diariooficial/2006/09/08/documentos.pdf#page=1 2053 Rule Uruguay 2006 2014 - Oct Sun>=1 2:00 1:00 - 2054 # From Steffen Thorsen (2015-06-30): 2055 # ... it looks like they will not be using DST the coming summer: 2056 # http://www.elobservador.com.uy/gobierno-resolvio-que-no-habra-cambio-horario-verano-n656787 2057 # http://www.republica.com.uy/este-ano-no-se-modificara-el-huso-horario-en-uruguay/523760/ 2058 # From Paul Eggert (2015-06-30): 2059 # Apparently restaurateurs complained that DST caused people to go to the beach 2060 # instead of out to dinner. 2061 # From Pablo Camargo (2015-07-13): 2062 # http://archivo.presidencia.gub.uy/sci/decretos/2015/06/cons_min_201.pdf 2063 # From Tim Parenti (2018-02-15): 2064 # Decreto 178/015 of 2015-06-29; repeals Decreto 311/006. 2065 2066 # This Zone can be simplified once we assume zic %z. 2067 Zone America/Montevideo -3:44:51 - LMT 1908 Jun 10 2068 -3:44:51 - MMT 1920 May 1 # Montevideo MT 2069 -4:00 - %z 1923 Oct 1 2070 -3:30 Uruguay %z 1942 Dec 14 2071 -3:00 Uruguay %z 1960 2072 -3:00 Uruguay %z 1968 2073 -3:00 Uruguay %z 1970 2074 -3:00 Uruguay %z 1974 2075 -3:00 Uruguay %z 1974 Mar 10 2076 -3:00 Uruguay %z 1974 Dec 22 2077 -3:00 Uruguay %z 2078 2079 # Venezuela 2080 # 2081 # From Paul Eggert (2015-07-28): 2082 # For the 1965 transition see Gaceta Oficial No. 27.619 (1964-12-15), p 205.533 2083 # http://www.pgr.gob.ve/dmdocuments/1964/27619.pdf 2084 # 2085 # From John Stainforth (2007-11-28): 2086 # ... the change for Venezuela originally expected for 2007-12-31 has 2087 # been brought forward to 2007-12-09. The official announcement was 2088 # published today in the "Gaceta Oficial de la Repblica Bolivariana 2089 # de Venezuela, nmero 38.819" (official document for all laws or 2090 # resolution publication) 2091 # http://www.globovision.com/news.php?nid=72208 2092 2093 # From Alexander Krivenyshev (2016-04-15): 2094 # https://actualidad.rt.com/actualidad/204758-venezuela-modificar-huso-horario-sequia-elnino 2095 # 2096 # From Paul Eggert (2016-04-15): 2097 # Clocks advance 30 minutes on 2016-05-01 at 02:30.... 2098 # "'Venezuela's new time-zone: hours without light, hours without water, 2099 # hours of presidential broadcasts, hours of lines,' quipped comedian 2100 # Jean Mary Curr ...". See: Cawthorne A, Kai D. Venezuela scraps 2101 # half-hour time difference set by Chavez. Reuters 2016-04-15 14:50 -0400 2102 # https://www.reuters.com/article/us-venezuela-timezone-idUSKCN0XC2BE 2103 # 2104 # From Matt Johnson (2016-04-20): 2105 # ... published in the official Gazette [2016-04-18], here: 2106 # http://historico.tsj.gob.ve/gaceta_ext/abril/1842016/E-1842016-4551.pdf 2107 2108 # Zone NAME STDOFF RULES FORMAT [UNTIL] 2109 Zone America/Caracas -4:27:44 - LMT 1890 2110 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time? 2111 -4:30 - %z 1965 Jan 1 0:00 2112 -4:00 - %z 2007 Dec 9 3:00 2113 -4:30 - %z 2016 May 1 2:30 2114 -4:00 - %z 2115
Indexes created Sat Apr 25 00:22:52 UTC 2026