189abb9f8SPhilip Paeps# tzdb data for South America and environs 289abb9f8SPhilip Paeps 31315084cSEdwin Groothuis# This file is in the public domain, so clarified as of 41315084cSEdwin Groothuis# 2009-05-17 by Arthur David Olson. 51315084cSEdwin Groothuis 67ce0f064SEdwin Groothuis# This file is by no means authoritative; if you think you know better, 71315084cSEdwin Groothuis# go ahead and edit the file (and please send any changes to 87ce0f064SEdwin Groothuis# tz@iana.org for general use in the future). For more, please see 97ce0f064SEdwin Groothuis# the file CONTRIBUTING in the tz distribution. 101315084cSEdwin Groothuis 11dc135c6eSBaptiste Daroussin# From Paul Eggert (2016-12-05): 12d61d836cSEdwin Groothuis# 13d61d836cSEdwin Groothuis# Unless otherwise specified, the source for data through 1990 is: 141315084cSEdwin Groothuis# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), 151315084cSEdwin Groothuis# San Diego: ACS Publications, Inc. (2003). 16d61d836cSEdwin Groothuis# Unfortunately this book contains many errors and cites no sources. 17eb185a68SEdwin Groothuis# 18dc135c6eSBaptiste Daroussin# Many years ago Gwillim Law wrote that a good source 19dc135c6eSBaptiste Daroussin# for time zone data was the International Air Transport 201315084cSEdwin Groothuis# Association's Standard Schedules Information Manual (IATA SSIM), 211315084cSEdwin Groothuis# published semiannually. Law sent in several helpful summaries 22d61d836cSEdwin Groothuis# of the IATA's data after 1990. Except where otherwise noted, 23d61d836cSEdwin Groothuis# IATA SSIM is the source for entries after 1990. 241315084cSEdwin Groothuis# 25d61d836cSEdwin Groothuis# For data circa 1899, a common source is: 26d61d836cSEdwin Groothuis# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94. 278d7edd17SPhilip Paeps# https://www.jstor.org/stable/1774359 281315084cSEdwin Groothuis# 29dc135c6eSBaptiste Daroussin# These tables use numeric abbreviations like -03 and -0330 for 30f2fcff28SPhilip Paeps# integer hour and minute UT offsets. Although earlier editions used 31dc135c6eSBaptiste Daroussin# alphabetic time zone abbreviations, these abbreviations were 32dc135c6eSBaptiste Daroussin# invented and did not reflect common practice. 331315084cSEdwin Groothuis 341315084cSEdwin Groothuis############################################################################### 351315084cSEdwin Groothuis 361315084cSEdwin Groothuis############################################################################### 371315084cSEdwin Groothuis 381315084cSEdwin Groothuis# Argentina 391315084cSEdwin Groothuis 401315084cSEdwin Groothuis# From Bob Devine (1988-01-28): 411315084cSEdwin Groothuis# Argentina: first Sunday in October to first Sunday in April since 1976. 421315084cSEdwin Groothuis# Double Summer time from 1969 to 1974. Switches at midnight. 431315084cSEdwin Groothuis 44eb1c1a05SSergey Kandaurov# From U. S. Naval Observatory (1988-01-19): 451315084cSEdwin Groothuis# ARGENTINA 3 H BEHIND UTC 461315084cSEdwin Groothuis 471315084cSEdwin Groothuis# From Hernan G. Otero (1995-06-26): 481315084cSEdwin Groothuis# I am sending modifications to the Argentine time zone table... 491315084cSEdwin Groothuis# AR was chosen because they are the ISO letters that represent Argentina. 501315084cSEdwin Groothuis 5112a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 5246bee4edSPhilip PaepsRule Arg 1930 only - Dec 1 0:00 1:00 - 531315084cSEdwin GroothuisRule Arg 1931 only - Apr 1 0:00 0 - 5446bee4edSPhilip PaepsRule Arg 1931 only - Oct 15 0:00 1:00 - 551315084cSEdwin GroothuisRule Arg 1932 1940 - Mar 1 0:00 0 - 5646bee4edSPhilip PaepsRule Arg 1932 1939 - Nov 1 0:00 1:00 - 5746bee4edSPhilip PaepsRule Arg 1940 only - Jul 1 0:00 1:00 - 581315084cSEdwin GroothuisRule Arg 1941 only - Jun 15 0:00 0 - 5946bee4edSPhilip PaepsRule Arg 1941 only - Oct 15 0:00 1:00 - 601315084cSEdwin GroothuisRule Arg 1943 only - Aug 1 0:00 0 - 6146bee4edSPhilip PaepsRule Arg 1943 only - Oct 15 0:00 1:00 - 621315084cSEdwin GroothuisRule Arg 1946 only - Mar 1 0:00 0 - 6346bee4edSPhilip PaepsRule Arg 1946 only - Oct 1 0:00 1:00 - 641315084cSEdwin GroothuisRule Arg 1963 only - Oct 1 0:00 0 - 6546bee4edSPhilip PaepsRule Arg 1963 only - Dec 15 0:00 1:00 - 661315084cSEdwin GroothuisRule Arg 1964 1966 - Mar 1 0:00 0 - 6746bee4edSPhilip PaepsRule Arg 1964 1966 - Oct 15 0:00 1:00 - 681315084cSEdwin GroothuisRule Arg 1967 only - Apr 2 0:00 0 - 6946bee4edSPhilip PaepsRule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 - 701315084cSEdwin GroothuisRule Arg 1968 1969 - Apr Sun>=1 0:00 0 - 7146bee4edSPhilip PaepsRule Arg 1974 only - Jan 23 0:00 1:00 - 721315084cSEdwin GroothuisRule Arg 1974 only - May 1 0:00 0 - 7346bee4edSPhilip PaepsRule Arg 1988 only - Dec 1 0:00 1:00 - 741315084cSEdwin Groothuis# 751315084cSEdwin Groothuis# From Hernan G. Otero (1995-06-26): 761315084cSEdwin Groothuis# These corrections were contributed by InterSoft Argentina S.A., 771315084cSEdwin Groothuis# obtaining the data from the: 78eb1c1a05SSergey Kandaurov# Talleres de Hidrografía Naval Argentina 791315084cSEdwin Groothuis# (Argentine Naval Hydrography Institute) 801315084cSEdwin GroothuisRule Arg 1989 1993 - Mar Sun>=1 0:00 0 - 8146bee4edSPhilip PaepsRule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 - 821315084cSEdwin Groothuis# 831315084cSEdwin Groothuis# From Hernan G. Otero (1995-06-26): 841315084cSEdwin Groothuis# From this moment on, the law that mandated the daylight saving 851315084cSEdwin Groothuis# time corrections was derogated and no more modifications 861315084cSEdwin Groothuis# to the time zones (for daylight saving) are now made. 871315084cSEdwin Groothuis# 881315084cSEdwin Groothuis# From Rives McDow (2000-01-10): 891315084cSEdwin Groothuis# On October 3, 1999, 0:00 local, Argentina implemented daylight savings time, 901315084cSEdwin Groothuis# which did not result in the switch of a time zone, as they stayed 9 hours 911315084cSEdwin Groothuis# from the International Date Line. 9246bee4edSPhilip PaepsRule Arg 1999 only - Oct Sun>=1 0:00 1:00 - 931315084cSEdwin Groothuis# From Paul Eggert (2007-12-28): 941315084cSEdwin Groothuis# DST was set to expire on March 5, not March 3, but since it was converted 951315084cSEdwin Groothuis# to standard time on March 3 it's more convenient for us to pretend that 961315084cSEdwin Groothuis# it ended on March 3. 971315084cSEdwin GroothuisRule Arg 2000 only - Mar 3 0:00 0 - 981315084cSEdwin Groothuis# 991315084cSEdwin Groothuis# From Peter Gradelski via Steffen Thorsen (2000-03-01): 100eb1c1a05SSergey Kandaurov# We just checked with our São Paulo office and they say the government of 1011315084cSEdwin Groothuis# Argentina decided not to become one of the countries that go on or off DST. 1021315084cSEdwin Groothuis# So Buenos Aires should be -3 hours from GMT at all times. 1031315084cSEdwin Groothuis# 104eb1c1a05SSergey Kandaurov# From Fabián L. Arce Jofré (2000-04-04): 1051315084cSEdwin Groothuis# The law that claimed DST for Argentina was derogated by President Fernando 106eb1c1a05SSergey Kandaurov# de la Rúa on March 2, 2000, because it would make people spend more energy 1071315084cSEdwin Groothuis# in the winter time, rather than less. The change took effect on March 3. 1081315084cSEdwin Groothuis# 1091315084cSEdwin Groothuis# From Mariano Absatz (2001-06-06): 1101315084cSEdwin Groothuis# one of the major newspapers here in Argentina said that the 1999 1111315084cSEdwin Groothuis# Timezone Law (which never was effectively applied) will (would?) be 1121315084cSEdwin Groothuis# in effect.... The article is at 1131315084cSEdwin Groothuis# http://ar.clarin.com/diario/2001-06-06/e-01701.htm 1146790a258SEdwin Groothuis# ... The Law itself is "Ley No. 25155", sanctioned on 1999-08-25, enacted 1151315084cSEdwin Groothuis# 1999-09-17, and published 1999-09-21. The official publication is at: 1161315084cSEdwin Groothuis# http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF 1171315084cSEdwin Groothuis# Regretfully, you have to subscribe (and pay) for the on-line version.... 1181315084cSEdwin Groothuis# 1191315084cSEdwin Groothuis# (2001-06-12): 1201315084cSEdwin Groothuis# the timezone for Argentina will not change next Sunday. 1211315084cSEdwin Groothuis# Apparently it will do so on Sunday 24th.... 1221315084cSEdwin Groothuis# http://ar.clarin.com/diario/2001-06-12/s-03501.htm 1231315084cSEdwin Groothuis# 1241315084cSEdwin Groothuis# (2001-06-25): 1251315084cSEdwin Groothuis# Last Friday (yes, the last working day before the date of the change), the 1261315084cSEdwin Groothuis# Senate annulled the 1999 law that introduced the changes later postponed. 1271315084cSEdwin Groothuis# http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm 1281315084cSEdwin Groothuis# It remains the vote of the Deputies..., but it will be the same.... 1291315084cSEdwin Groothuis# This kind of things had always been done this way in Argentina. 1301315084cSEdwin Groothuis# We are still -03:00 all year round in all of the country. 1311315084cSEdwin Groothuis# 1321315084cSEdwin Groothuis# From Steffen Thorsen (2007-12-21): 1331315084cSEdwin Groothuis# A user (Leonardo Chaim) reported that Argentina will adopt DST.... 1341315084cSEdwin Groothuis# all of the country (all Zone-entries) are affected. News reports like 1351315084cSEdwin Groothuis# http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate 1361315084cSEdwin Groothuis# that Argentina will use DST next year as well, from October to 1371315084cSEdwin Groothuis# March, although exact rules are not given. 1381315084cSEdwin Groothuis# 139eb1c1a05SSergey Kandaurov# From Jesper Nørgaard Welen (2007-12-26) 1401315084cSEdwin Groothuis# The last hurdle of Argentina DST is over, the proposal was approved in 141eb1c1a05SSergey Kandaurov# the lower chamber too (Diputados) with a vote 192 for and 2 against. 1421315084cSEdwin Groothuis# By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to 1431315084cSEdwin Groothuis# the original scanned proposal, where the dates and the zero hours are 1441315084cSEdwin Groothuis# clear and unambiguous...This is the article about final approval: 1451315084cSEdwin Groothuis# http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996 1461315084cSEdwin Groothuis# 1471315084cSEdwin Groothuis# From Paul Eggert (2007-12-22): 1481315084cSEdwin Groothuis# For dates after mid-2008, the following rules are my guesses and 1491315084cSEdwin Groothuis# are quite possibly wrong, but are more likely than no DST at all. 1501315084cSEdwin Groothuis 1511315084cSEdwin Groothuis# From Alexander Krivenyshev (2008-09-05): 1521315084cSEdwin Groothuis# As per message from Carlos Alberto Fonseca Arauz (Nicaragua), 1531315084cSEdwin Groothuis# Argentina will start DST on Sunday October 19, 2008. 1541315084cSEdwin Groothuis# 1551315084cSEdwin Groothuis# http://www.worldtimezone.com/dst_news/dst_news_argentina03.html 1561315084cSEdwin Groothuis# http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish) 1571315084cSEdwin Groothuis 1586790a258SEdwin Groothuis# From Juan Manuel Docile in https://bugs.gentoo.org/240339 (2008-10-07) 1596790a258SEdwin Groothuis# via Rodrigo Severo: 1606790a258SEdwin Groothuis# Argentinian law No. 25.155 is no longer valid. 1611315084cSEdwin Groothuis# http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm 1626790a258SEdwin Groothuis# The new one is law No. 26.350 1631315084cSEdwin Groothuis# http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm 1641315084cSEdwin Groothuis# So there is no summer time in Argentina for now. 1651315084cSEdwin Groothuis 1661315084cSEdwin Groothuis# From Mariano Absatz (2008-10-20): 1677ce0f064SEdwin Groothuis# Decree 1693/2008 applies Law 26.350 for the summer 2008/2009 establishing DST 1687ce0f064SEdwin Groothuis# in Argentina from 2008-10-19 until 2009-03-15. 1691315084cSEdwin Groothuis# http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01 1701315084cSEdwin Groothuis# 171eb1c1a05SSergey Kandaurov 172eb1c1a05SSergey Kandaurov# Decree 1705/2008 excepting 12 Provinces from applying DST in the summer 173eb1c1a05SSergey Kandaurov# 2008/2009: Catamarca, La Rioja, Mendoza, Salta, San Juan, San Luis, La 174eb1c1a05SSergey Kandaurov# Pampa, Neuquén, Rio Negro, Chubut, Santa Cruz and Tierra del Fuego 1751315084cSEdwin Groothuis# http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01 1761315084cSEdwin Groothuis# 1777ce0f064SEdwin Groothuis# Press release 235 dated Saturday October 18th, from the Government of the 1787ce0f064SEdwin Groothuis# Province of Jujuy saying it will not apply DST either (even when it was not 1797ce0f064SEdwin Groothuis# included in Decree 1705/2008). 1801315084cSEdwin Groothuis# http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc 1811315084cSEdwin Groothuis 1821315084cSEdwin Groothuis# From fullinet (2009-10-18): 1831315084cSEdwin Groothuis# As announced in 1841315084cSEdwin Groothuis# http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356 1857ce0f064SEdwin Groothuis# (an official .gob.ar) under title: "Sin Cambio de Hora" 1867ce0f064SEdwin Groothuis# (English: "No hour change"). 1871315084cSEdwin Groothuis# 188eb1c1a05SSergey Kandaurov# "Por el momento, el Gobierno Nacional resolvió no modificar la hora 189eb1c1a05SSergey Kandaurov# oficial, decisión que estaba en estudio para su implementación el 190eb1c1a05SSergey Kandaurov# domingo 18 de octubre. Desde el Ministerio de Planificación se anunció 191eb1c1a05SSergey Kandaurov# que la Argentina hoy, en estas condiciones meteorológicas, no necesita 192eb1c1a05SSergey Kandaurov# la modificación del huso horario, ya que 2009 nos encuentra con 193eb1c1a05SSergey Kandaurov# crecimiento en la producción y distribución energética." 1941315084cSEdwin Groothuis 19546bee4edSPhilip PaepsRule Arg 2007 only - Dec 30 0:00 1:00 - 1961315084cSEdwin GroothuisRule Arg 2008 2009 - Mar Sun>=15 0:00 0 - 19746bee4edSPhilip PaepsRule Arg 2008 only - Oct Sun>=15 0:00 1:00 - 1981315084cSEdwin Groothuis 1991315084cSEdwin Groothuis# From Mariano Absatz (2004-05-21): 2001315084cSEdwin Groothuis# Today it was officially published that the Province of Mendoza is changing 2011315084cSEdwin Groothuis# its timezone this winter... starting tomorrow night.... 2021315084cSEdwin Groothuis# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf 2031315084cSEdwin Groothuis# From Paul Eggert (2004-05-24): 2041315084cSEdwin Groothuis# It's Law No. 7,210. This change is due to a public power emergency, so for 2051315084cSEdwin Groothuis# now we'll assume it's for this year only. 2061315084cSEdwin Groothuis# 20746bee4edSPhilip Paeps# From Paul Eggert (2018-01-31): 2087ce0f064SEdwin Groothuis# Hora de verano para la República Argentina 2097ce0f064SEdwin Groothuis# http://buenasiembra.com.ar/esoterismo/astrologia/hora-de-verano-de-la-republica-argentina-27.html 210eb1c1a05SSergey Kandaurov# says that standard time in Argentina from 1894-10-31 211259e2ad7SPhilip Paeps# to 1920-05-01 was -4:16:48.25. Go with this more precise value 21246bee4edSPhilip Paeps# over Shanks & Pottenger. It is upward compatible with Milne, who 21346bee4edSPhilip Paeps# says Córdoba time was -4:16:48.2. 21446bee4edSPhilip Paeps 2151315084cSEdwin Groothuis# 2161315084cSEdwin Groothuis# From Mariano Absatz (2004-06-05): 2171315084cSEdwin Groothuis# These media articles from a major newspaper mostly cover the current state: 2181315084cSEdwin Groothuis# http://www.lanacion.com.ar/04/05/27/de_604825.asp 2191315084cSEdwin Groothuis# http://www.lanacion.com.ar/04/05/28/de_605203.asp 2201315084cSEdwin Groothuis# 2211315084cSEdwin Groothuis# The following eight (8) provinces pulled clocks back to UTC-04:00 at 2221315084cSEdwin Groothuis# midnight Monday May 31st. (that is, the night between 05/31 and 06/01). 2231315084cSEdwin Groothuis# Apparently, all nine provinces would go back to UTC-03:00 at the same 2241315084cSEdwin Groothuis# time in October 17th. 2251315084cSEdwin Groothuis# 2261315084cSEdwin Groothuis# Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz, 227eb1c1a05SSergey Kandaurov# Tierra del Fuego, Tucumán. 2281315084cSEdwin Groothuis# 2291315084cSEdwin Groothuis# From Mariano Absatz (2004-06-14): 230eb1c1a05SSergey Kandaurov# ... this weekend, the Province of Tucumán decided it'd go back to UTC-03:00 2311315084cSEdwin Groothuis# yesterday midnight (that is, at 24:00 Saturday 12th), since the people's 2321315084cSEdwin Groothuis# annoyance with the change is much higher than the power savings obtained.... 2331315084cSEdwin Groothuis# 2341315084cSEdwin Groothuis# From Gwillim Law (2004-06-14): 2351315084cSEdwin Groothuis# http://www.lanacion.com.ar/04/06/10/de_609078.asp ... 2361315084cSEdwin Groothuis# "The time change in Tierra del Fuego was a conflicted decision from 2371315084cSEdwin Groothuis# the start. The government had decreed that the measure would take 2381315084cSEdwin Groothuis# effect on June 1, but a normative error forced the new time to begin 2391315084cSEdwin Groothuis# three days earlier, from a Saturday to a Sunday.... 2401315084cSEdwin Groothuis# Our understanding was that the change was originally scheduled to take place 2411315084cSEdwin Groothuis# on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other 2421315084cSEdwin Groothuis# provinces). Sunday was May 30, only two days earlier. So the article 2431315084cSEdwin Groothuis# contains a contradiction. I would give more credence to the Saturday/Sunday 2441315084cSEdwin Groothuis# date than the "three days earlier" phrase, and conclude that Tierra del 2451315084cSEdwin Groothuis# Fuego set its clocks back at 2004-05-30 00:00. 2461315084cSEdwin Groothuis# 2471315084cSEdwin Groothuis# From Steffen Thorsen (2004-10-05): 2481315084cSEdwin Groothuis# The previous law 7210 which changed the province of Mendoza's time zone 2491315084cSEdwin Groothuis# back in May have been modified slightly in a new law 7277, which set the 2501315084cSEdwin Groothuis# new end date to 2004-09-26 (original date was 2004-10-17). 2511315084cSEdwin Groothuis# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf 2521315084cSEdwin Groothuis# 2531315084cSEdwin Groothuis# From Mariano Absatz (2004-10-05): 2541315084cSEdwin Groothuis# San Juan changed from UTC-03:00 to UTC-04:00 at midnight between 2551315084cSEdwin Groothuis# Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00 2561315084cSEdwin Groothuis# at midnight between Saturday, July 24th and Sunday, July 25th.... 2571315084cSEdwin Groothuis# http://www.sanjuan.gov.ar/prensa/archivo/000329.html 2581315084cSEdwin Groothuis# http://www.sanjuan.gov.ar/prensa/archivo/000426.html 2591315084cSEdwin Groothuis# http://www.sanjuan.gov.ar/prensa/archivo/000441.html 2601315084cSEdwin Groothuis 2611315084cSEdwin Groothuis# From Alex Krivenyshev (2008-01-17): 2621315084cSEdwin Groothuis# Here are articles that Argentina Province San Luis is planning to end DST 2631315084cSEdwin Groothuis# as earlier as upcoming Monday January 21, 2008 or February 2008: 2641315084cSEdwin Groothuis# 265eb1c1a05SSergey Kandaurov# Provincia argentina retrasa reloj y marca diferencia con resto del país 2661315084cSEdwin Groothuis# (Argentine Province delayed clock and mark difference with the rest of the 2671315084cSEdwin Groothuis# country) 2681315084cSEdwin Groothuis# http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel 2691315084cSEdwin Groothuis# 2701315084cSEdwin Groothuis# Es inminente que en San Luis atrasen una hora los relojes 2711315084cSEdwin Groothuis# (It is imminent in San Luis clocks one hour delay) 2728d7edd17SPhilip Paeps# https://www.lagaceta.com.ar/nota/253414/Economia/Es-inminente-que-en-San-Luis-atrasen-una-hora-los-relojes.html 2738d7edd17SPhilip Paeps# http://www.worldtimezone.com/dst_news/dst_news_argentina02.html 2741315084cSEdwin Groothuis 275eb1c1a05SSergey Kandaurov# From Jesper Nørgaard Welen (2008-01-18): 2761315084cSEdwin Groothuis# The page of the San Luis provincial government 2771315084cSEdwin Groothuis# http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812 2781315084cSEdwin Groothuis# confirms what Alex Krivenyshev has earlier sent to the tz 2791315084cSEdwin Groothuis# emailing list about that San Luis plans to return to standard 2801315084cSEdwin Groothuis# time much earlier than the rest of the country. It also 2811315084cSEdwin Groothuis# confirms that upon request the provinces San Juan and Mendoza 2821315084cSEdwin Groothuis# refused to follow San Luis in this change. 2831315084cSEdwin Groothuis# 2847ce0f064SEdwin Groothuis# The change is supposed to take place Monday the 21st at 0:00 2851315084cSEdwin Groothuis# hours. As far as I understand it if this goes ahead, we need 2861315084cSEdwin Groothuis# a new timezone for San Luis (although there are also documented 2871315084cSEdwin Groothuis# independent changes in the southamerica file of San Luis in 2881315084cSEdwin Groothuis# 1990 and 1991 which has not been confirmed). 2891315084cSEdwin Groothuis 290eb1c1a05SSergey Kandaurov# From Jesper Nørgaard Welen (2008-01-25): 2911315084cSEdwin Groothuis# Unfortunately the below page has become defunct, about the San Luis 2921315084cSEdwin Groothuis# time change. Perhaps because it now is part of a group of pages "Most 2931315084cSEdwin Groothuis# important pages of 2008." 2941315084cSEdwin Groothuis# 2951315084cSEdwin Groothuis# You can use 2961315084cSEdwin Groothuis# http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834 2971315084cSEdwin Groothuis# instead it seems. Or use "Buscador" from the main page of the San Luis 2981315084cSEdwin Groothuis# government, and fill in "huso" and click OK, and you will get 3 pages 2991315084cSEdwin Groothuis# from which the first one is identical to the above. 3001315084cSEdwin Groothuis 3011315084cSEdwin Groothuis# From Mariano Absatz (2008-01-28): 3021315084cSEdwin Groothuis# I can confirm that the Province of San Luis (and so far only that 3031315084cSEdwin Groothuis# province) decided to go back to UTC-3 effective midnight Jan 20th 2008 3041315084cSEdwin Groothuis# (that is, Monday 21st at 0:00 is the time the clocks were delayed back 3051315084cSEdwin Groothuis# 1 hour), and they intend to keep UTC-3 as their timezone all year round 3061315084cSEdwin Groothuis# (that is, unless they change their mind any minute now). 3071315084cSEdwin Groothuis# 3081315084cSEdwin Groothuis# So we'll have to add yet another city to 'southamerica' (I think San 3091315084cSEdwin Groothuis# Luis city is the mos populated city in the Province, so it'd be 3101315084cSEdwin Groothuis# America/Argentina/San_Luis... of course I can't remember if San Luis's 3111315084cSEdwin Groothuis# history of particular changes goes along with Mendoza or San Juan :-( 3121315084cSEdwin Groothuis# (I only remember not being able to collect hard facts about San Luis 3131315084cSEdwin Groothuis# back in 2004, when these provinces changed to UTC-4 for a few days, I 3141315084cSEdwin Groothuis# mailed them personally and never got an answer). 3151315084cSEdwin Groothuis 3167ce0f064SEdwin Groothuis# From Paul Eggert (2014-08-12): 3177ce0f064SEdwin Groothuis# Unless otherwise specified, data entries are from Shanks & Pottenger through 3187ce0f064SEdwin Groothuis# 1992, from the IATA otherwise. As noted below, Shanks & Pottenger say that 3191315084cSEdwin Groothuis# America/Cordoba split into 6 subregions during 1991/1992, one of which 3201315084cSEdwin Groothuis# was America/San_Luis, but we haven't verified this yet so for now we'll 3211315084cSEdwin Groothuis# keep America/Cordoba a single region rather than splitting it into the 3221315084cSEdwin Groothuis# other 5 subregions. 3231315084cSEdwin Groothuis 3241315084cSEdwin Groothuis# From Mariano Absatz (2009-03-13): 3251315084cSEdwin Groothuis# Yesterday (with our usual 2-day notice) the Province of San Luis 3261315084cSEdwin Groothuis# decided that next Sunday instead of "staying" @utc-03:00 they will go 3271315084cSEdwin Groothuis# to utc-04:00 until the second Saturday in October... 3281315084cSEdwin Groothuis# 3291315084cSEdwin Groothuis# The press release is at 3301315084cSEdwin Groothuis# http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102 331eb1c1a05SSergey Kandaurov# (I couldn't find the decree, but www.sanluis.gov.ar 332eb1c1a05SSergey Kandaurov# is the official page for the Province Government.) 3331315084cSEdwin Groothuis# 334eb185a68SEdwin Groothuis# There's also a note in only one of the major national papers ... 3351315084cSEdwin Groothuis# http://www.lanacion.com.ar/nota.asp?nota_id=1107912 3361315084cSEdwin Groothuis# 337eb185a68SEdwin Groothuis# The press release says [quick and dirty translation]: 338eb185a68SEdwin Groothuis# ... announced that next Sunday, at 00:00, Puntanos (the San Luis 3391315084cSEdwin Groothuis# inhabitants) will have to turn back one hour their clocks 3401315084cSEdwin Groothuis# 3411315084cSEdwin Groothuis# Since then, San Luis will establish its own Province timezone. Thus, 3421315084cSEdwin Groothuis# during 2009, this timezone change will run from 00:00 the third Sunday 3431315084cSEdwin Groothuis# in March until 24:00 of the second Saturday in October. 3441315084cSEdwin Groothuis 3451315084cSEdwin Groothuis# From Mariano Absatz (2009-10-16): 3461315084cSEdwin Groothuis# ...the Province of San Luis is a case in itself. 3471315084cSEdwin Groothuis# 3481315084cSEdwin Groothuis# The Law at 3491315084cSEdwin Groothuis# http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276 3501315084cSEdwin Groothuis# is ambiguous because establishes a calendar from the 2nd Sunday in 3511315084cSEdwin Groothuis# October at 0:00 thru the 2nd Saturday in March at 24:00 and the 3521315084cSEdwin Groothuis# complement of that starting on the 2nd Sunday of March at 0:00 and 3531315084cSEdwin Groothuis# ending on the 2nd Saturday of March at 24:00. 3541315084cSEdwin Groothuis# 3551315084cSEdwin Groothuis# This clearly breaks every time the 1st of March or October is a Sunday. 3561315084cSEdwin Groothuis# 3571315084cSEdwin Groothuis# IMHO, the "spirit of the Law" is to make the changes at 0:00 on the 2nd 3581315084cSEdwin Groothuis# Sunday of October and March. 3591315084cSEdwin Groothuis# 3601315084cSEdwin Groothuis# The problem is that the changes in the rest of the Provinces that did 3611315084cSEdwin Groothuis# change in 2007/2008, were made according to the Federal Law and Decrees 3621315084cSEdwin Groothuis# that did so on the 3rd Sunday of October and March. 3631315084cSEdwin Groothuis# 3641315084cSEdwin Groothuis# In fact, San Luis actually switched from UTC-4 to UTC-3 last Sunday 3651315084cSEdwin Groothuis# (October 11th) at 0:00. 3661315084cSEdwin Groothuis# 3671315084cSEdwin Groothuis# So I guess a new set of rules, besides "Arg", must be made and the last 3681315084cSEdwin Groothuis# America/Argentina/San_Luis entries should change to use these... 3691315084cSEdwin Groothuis# ... 3701315084cSEdwin Groothuis 371696dd8f4SEdwin Groothuis# From Alexander Krivenyshev (2010-04-09): 3727ce0f064SEdwin Groothuis# According to news reports from El Diario de la República Province San 373696dd8f4SEdwin Groothuis# Luis, Argentina (standard time UTC-04) will keep Daylight Saving Time 374eb1c1a05SSergey Kandaurov# after April 11, 2010 - will continue to have same time as rest of 375696dd8f4SEdwin Groothuis# Argentina (UTC-3) (no DST). 376696dd8f4SEdwin Groothuis# 377eb1c1a05SSergey Kandaurov# Confirmaron la prórroga del huso horario de verano (Spanish) 378696dd8f4SEdwin Groothuis# http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9 379696dd8f4SEdwin Groothuis# or (some English translation): 380696dd8f4SEdwin Groothuis# http://www.worldtimezone.com/dst_news/dst_news_argentina08.html 381696dd8f4SEdwin Groothuis 382696dd8f4SEdwin Groothuis# From Mariano Absatz (2010-04-12): 383696dd8f4SEdwin Groothuis# yes...I can confirm this...and given that San Luis keeps calling 384696dd8f4SEdwin Groothuis# UTC-03:00 "summer time", we should't just let San Luis go back to "Arg" 385696dd8f4SEdwin Groothuis# rules...San Luis is still using "Western ARgentina Time" and it got 386696dd8f4SEdwin Groothuis# stuck on Summer daylight savings time even though the summer is over. 387696dd8f4SEdwin Groothuis 38846bee4edSPhilip Paeps# From Paul Eggert (2018-01-23): 3898fdf5721SBaptiste Daroussin# Perhaps San Luis operates on the legal fiction that it is at -04 39046bee4edSPhilip Paeps# with perpetual daylight saving time, but ordinary usage typically seems to 3918fdf5721SBaptiste Daroussin# just say it's at -03; see, for example, 3928d7edd17SPhilip Paeps# https://es.wikipedia.org/wiki/Hora_oficial_argentina 393c26a5802SEdwin Groothuis# We've documented similar situations as being plain changes to 394c26a5802SEdwin Groothuis# standard time, so let's do that here too. This does not change UTC 395c26a5802SEdwin Groothuis# offsets, only tm_isdst and the time zone abbreviations. One minor 396c26a5802SEdwin Groothuis# plus is that this silences a zic complaint that there's no POSIX TZ 397c26a5802SEdwin Groothuis# setting for timestamps past 2038. 398c26a5802SEdwin Groothuis 3992865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 4001315084cSEdwin Groothuis# 4011315084cSEdwin Groothuis# Buenos Aires (BA), Capital Federal (CF), 4021315084cSEdwin GroothuisZone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31 4039f9fc6bbSPhilip Paeps #STDOFF -4:16:48.25 404eb1c1a05SSergey Kandaurov -4:16:48 - CMT 1920 May # Córdoba Mean Time 405dc135c6eSBaptiste Daroussin -4:00 - -04 1930 Dec 406dc135c6eSBaptiste Daroussin -4:00 Arg -04/-03 1969 Oct 5 407dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 1999 Oct 3 408dc135c6eSBaptiste Daroussin -4:00 Arg -04/-03 2000 Mar 3 409dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 4101315084cSEdwin Groothuis# 411eb1c1a05SSergey Kandaurov# Córdoba (CB), Santa Fe (SF), Entre Ríos (ER), Corrientes (CN), Misiones (MN), 4121315084cSEdwin Groothuis# Chaco (CC), Formosa (FM), Santiago del Estero (SE) 4131315084cSEdwin Groothuis# 4141315084cSEdwin Groothuis# Shanks & Pottenger also make the following claims, which we haven't verified: 4151315084cSEdwin Groothuis# - Formosa switched to -3:00 on 1991-01-07. 4161315084cSEdwin Groothuis# - Misiones switched to -3:00 on 1990-12-29. 4171315084cSEdwin Groothuis# - Chaco switched to -3:00 on 1991-01-04. 4181315084cSEdwin Groothuis# - Santiago del Estero switched to -4:00 on 1991-04-01, 4191315084cSEdwin Groothuis# then to -3:00 on 1991-04-26. 4201315084cSEdwin Groothuis# 4219f9fc6bbSPhilip Paeps #STDOFF -4:16:48.25 4221315084cSEdwin GroothuisZone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31 4231315084cSEdwin Groothuis -4:16:48 - CMT 1920 May 424dc135c6eSBaptiste Daroussin -4:00 - -04 1930 Dec 425dc135c6eSBaptiste Daroussin -4:00 Arg -04/-03 1969 Oct 5 426dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 1991 Mar 3 427dc135c6eSBaptiste Daroussin -4:00 - -04 1991 Oct 20 428dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 1999 Oct 3 429dc135c6eSBaptiste Daroussin -4:00 Arg -04/-03 2000 Mar 3 430dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 4311315084cSEdwin Groothuis# 432eb1c1a05SSergey Kandaurov# Salta (SA), La Pampa (LP), Neuquén (NQ), Rio Negro (RN) 4331315084cSEdwin GroothuisZone America/Argentina/Salta -4:21:40 - LMT 1894 Oct 31 4349f9fc6bbSPhilip Paeps #STDOFF -4:16:48.25 4351315084cSEdwin Groothuis -4:16:48 - CMT 1920 May 436dc135c6eSBaptiste Daroussin -4:00 - -04 1930 Dec 437dc135c6eSBaptiste Daroussin -4:00 Arg -04/-03 1969 Oct 5 438dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 1991 Mar 3 439dc135c6eSBaptiste Daroussin -4:00 - -04 1991 Oct 20 440dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 1999 Oct 3 441dc135c6eSBaptiste Daroussin -4:00 Arg -04/-03 2000 Mar 3 442dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 2008 Oct 18 443dc135c6eSBaptiste Daroussin -3:00 - -03 4441315084cSEdwin Groothuis# 445eb1c1a05SSergey Kandaurov# Tucumán (TM) 4461315084cSEdwin GroothuisZone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31 4479f9fc6bbSPhilip Paeps #STDOFF -4:16:48.25 4481315084cSEdwin Groothuis -4:16:48 - CMT 1920 May 449dc135c6eSBaptiste Daroussin -4:00 - -04 1930 Dec 450dc135c6eSBaptiste Daroussin -4:00 Arg -04/-03 1969 Oct 5 451dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 1991 Mar 3 452dc135c6eSBaptiste Daroussin -4:00 - -04 1991 Oct 20 453dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 1999 Oct 3 454dc135c6eSBaptiste Daroussin -4:00 Arg -04/-03 2000 Mar 3 455dc135c6eSBaptiste Daroussin -3:00 - -03 2004 Jun 1 456dc135c6eSBaptiste Daroussin -4:00 - -04 2004 Jun 13 457dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 4581315084cSEdwin Groothuis# 4591315084cSEdwin Groothuis# La Rioja (LR) 4601315084cSEdwin GroothuisZone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31 4619f9fc6bbSPhilip Paeps #STDOFF -4:16:48.25 4621315084cSEdwin Groothuis -4:16:48 - CMT 1920 May 463dc135c6eSBaptiste Daroussin -4:00 - -04 1930 Dec 464dc135c6eSBaptiste Daroussin -4:00 Arg -04/-03 1969 Oct 5 465dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 1991 Mar 1 466dc135c6eSBaptiste Daroussin -4:00 - -04 1991 May 7 467dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 1999 Oct 3 468dc135c6eSBaptiste Daroussin -4:00 Arg -04/-03 2000 Mar 3 469dc135c6eSBaptiste Daroussin -3:00 - -03 2004 Jun 1 470dc135c6eSBaptiste Daroussin -4:00 - -04 2004 Jun 20 471dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 2008 Oct 18 472dc135c6eSBaptiste Daroussin -3:00 - -03 4731315084cSEdwin Groothuis# 4741315084cSEdwin Groothuis# San Juan (SJ) 4751315084cSEdwin GroothuisZone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31 4769f9fc6bbSPhilip Paeps #STDOFF -4:16:48.25 4771315084cSEdwin Groothuis -4:16:48 - CMT 1920 May 478dc135c6eSBaptiste Daroussin -4:00 - -04 1930 Dec 479dc135c6eSBaptiste Daroussin -4:00 Arg -04/-03 1969 Oct 5 480dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 1991 Mar 1 481dc135c6eSBaptiste Daroussin -4:00 - -04 1991 May 7 482dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 1999 Oct 3 483dc135c6eSBaptiste Daroussin -4:00 Arg -04/-03 2000 Mar 3 484dc135c6eSBaptiste Daroussin -3:00 - -03 2004 May 31 485dc135c6eSBaptiste Daroussin -4:00 - -04 2004 Jul 25 486dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 2008 Oct 18 487dc135c6eSBaptiste Daroussin -3:00 - -03 4881315084cSEdwin Groothuis# 4891315084cSEdwin Groothuis# Jujuy (JY) 4901315084cSEdwin GroothuisZone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31 4919f9fc6bbSPhilip Paeps #STDOFF -4:16:48.25 4921315084cSEdwin Groothuis -4:16:48 - CMT 1920 May 493dc135c6eSBaptiste Daroussin -4:00 - -04 1930 Dec 494dc135c6eSBaptiste Daroussin -4:00 Arg -04/-03 1969 Oct 5 495dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 1990 Mar 4 496dc135c6eSBaptiste Daroussin -4:00 - -04 1990 Oct 28 497dc135c6eSBaptiste Daroussin -4:00 1:00 -03 1991 Mar 17 498dc135c6eSBaptiste Daroussin -4:00 - -04 1991 Oct 6 499dc135c6eSBaptiste Daroussin -3:00 1:00 -02 1992 500dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 1999 Oct 3 501dc135c6eSBaptiste Daroussin -4:00 Arg -04/-03 2000 Mar 3 502dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 2008 Oct 18 503dc135c6eSBaptiste Daroussin -3:00 - -03 5041315084cSEdwin Groothuis# 5051315084cSEdwin Groothuis# Catamarca (CT), Chubut (CH) 5061315084cSEdwin GroothuisZone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31 5079f9fc6bbSPhilip Paeps #STDOFF -4:16:48.25 5081315084cSEdwin Groothuis -4:16:48 - CMT 1920 May 509dc135c6eSBaptiste Daroussin -4:00 - -04 1930 Dec 510dc135c6eSBaptiste Daroussin -4:00 Arg -04/-03 1969 Oct 5 511dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 1991 Mar 3 512dc135c6eSBaptiste Daroussin -4:00 - -04 1991 Oct 20 513dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 1999 Oct 3 514dc135c6eSBaptiste Daroussin -4:00 Arg -04/-03 2000 Mar 3 515dc135c6eSBaptiste Daroussin -3:00 - -03 2004 Jun 1 516dc135c6eSBaptiste Daroussin -4:00 - -04 2004 Jun 20 517dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 2008 Oct 18 518dc135c6eSBaptiste Daroussin -3:00 - -03 5191315084cSEdwin Groothuis# 5201315084cSEdwin Groothuis# Mendoza (MZ) 5211315084cSEdwin GroothuisZone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31 5229f9fc6bbSPhilip Paeps #STDOFF -4:16:48.25 5231315084cSEdwin Groothuis -4:16:48 - CMT 1920 May 524dc135c6eSBaptiste Daroussin -4:00 - -04 1930 Dec 525dc135c6eSBaptiste Daroussin -4:00 Arg -04/-03 1969 Oct 5 526dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 1990 Mar 4 527dc135c6eSBaptiste Daroussin -4:00 - -04 1990 Oct 15 528dc135c6eSBaptiste Daroussin -4:00 1:00 -03 1991 Mar 1 529dc135c6eSBaptiste Daroussin -4:00 - -04 1991 Oct 15 530dc135c6eSBaptiste Daroussin -4:00 1:00 -03 1992 Mar 1 531dc135c6eSBaptiste Daroussin -4:00 - -04 1992 Oct 18 532dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 1999 Oct 3 533dc135c6eSBaptiste Daroussin -4:00 Arg -04/-03 2000 Mar 3 534dc135c6eSBaptiste Daroussin -3:00 - -03 2004 May 23 535dc135c6eSBaptiste Daroussin -4:00 - -04 2004 Sep 26 536dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 2008 Oct 18 537dc135c6eSBaptiste Daroussin -3:00 - -03 5381315084cSEdwin Groothuis# 5391315084cSEdwin Groothuis# San Luis (SL) 5401315084cSEdwin Groothuis 541696dd8f4SEdwin GroothuisRule SanLuis 2008 2009 - Mar Sun>=8 0:00 0 - 54246bee4edSPhilip PaepsRule SanLuis 2007 2008 - Oct Sun>=8 0:00 1:00 - 5431315084cSEdwin Groothuis 5441315084cSEdwin GroothuisZone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31 5459f9fc6bbSPhilip Paeps #STDOFF -4:16:48.25 5461315084cSEdwin Groothuis -4:16:48 - CMT 1920 May 547dc135c6eSBaptiste Daroussin -4:00 - -04 1930 Dec 548dc135c6eSBaptiste Daroussin -4:00 Arg -04/-03 1969 Oct 5 549dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 1990 550dc135c6eSBaptiste Daroussin -3:00 1:00 -02 1990 Mar 14 551dc135c6eSBaptiste Daroussin -4:00 - -04 1990 Oct 15 552dc135c6eSBaptiste Daroussin -4:00 1:00 -03 1991 Mar 1 553dc135c6eSBaptiste Daroussin -4:00 - -04 1991 Jun 1 554dc135c6eSBaptiste Daroussin -3:00 - -03 1999 Oct 3 555dc135c6eSBaptiste Daroussin -4:00 1:00 -03 2000 Mar 3 556dc135c6eSBaptiste Daroussin -3:00 - -03 2004 May 31 557dc135c6eSBaptiste Daroussin -4:00 - -04 2004 Jul 25 558dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 2008 Jan 21 559dc135c6eSBaptiste Daroussin -4:00 SanLuis -04/-03 2009 Oct 11 560dc135c6eSBaptiste Daroussin -3:00 - -03 5611315084cSEdwin Groothuis# 5621315084cSEdwin Groothuis# Santa Cruz (SC) 5631315084cSEdwin GroothuisZone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31 5649f9fc6bbSPhilip Paeps #STDOFF -4:16:48.25 565dc135c6eSBaptiste Daroussin -4:16:48 - CMT 1920 May 566dc135c6eSBaptiste Daroussin -4:00 - -04 1930 Dec 567dc135c6eSBaptiste Daroussin -4:00 Arg -04/-03 1969 Oct 5 568dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 1999 Oct 3 569dc135c6eSBaptiste Daroussin -4:00 Arg -04/-03 2000 Mar 3 570dc135c6eSBaptiste Daroussin -3:00 - -03 2004 Jun 1 571dc135c6eSBaptiste Daroussin -4:00 - -04 2004 Jun 20 572dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 2008 Oct 18 573dc135c6eSBaptiste Daroussin -3:00 - -03 5741315084cSEdwin Groothuis# 575eb1c1a05SSergey Kandaurov# Tierra del Fuego, Antártida e Islas del Atlántico Sur (TF) 5761315084cSEdwin GroothuisZone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31 5779f9fc6bbSPhilip Paeps #STDOFF -4:16:48.25 578dc135c6eSBaptiste Daroussin -4:16:48 - CMT 1920 May 579dc135c6eSBaptiste Daroussin -4:00 - -04 1930 Dec 580dc135c6eSBaptiste Daroussin -4:00 Arg -04/-03 1969 Oct 5 581dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 1999 Oct 3 582dc135c6eSBaptiste Daroussin -4:00 Arg -04/-03 2000 Mar 3 583dc135c6eSBaptiste Daroussin -3:00 - -03 2004 May 30 584dc135c6eSBaptiste Daroussin -4:00 - -04 2004 Jun 20 585dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 2008 Oct 18 586dc135c6eSBaptiste Daroussin -3:00 - -03 5871315084cSEdwin Groothuis 5881315084cSEdwin Groothuis# Bolivia 5892865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 5901315084cSEdwin GroothuisZone America/La_Paz -4:32:36 - LMT 1890 5911315084cSEdwin Groothuis -4:32:36 - CMT 1931 Oct 15 # Calamarca MT 592f2fcff28SPhilip Paeps -4:32:36 1:00 BST 1932 Mar 21 # Bolivia ST 593dc135c6eSBaptiste Daroussin -4:00 - -04 5941315084cSEdwin Groothuis 5951315084cSEdwin Groothuis# Brazil 5961315084cSEdwin Groothuis 5971315084cSEdwin Groothuis# From Paul Eggert (1993-11-18): 5981315084cSEdwin Groothuis# The mayor of Rio recently attempted to change the time zone rules 5991315084cSEdwin Groothuis# just in his city, in order to leave more summer time for the tourist trade. 6001315084cSEdwin Groothuis# The rule change lasted only part of the day; 6011315084cSEdwin Groothuis# the federal government refused to follow the city's rules, and business 6021315084cSEdwin Groothuis# was in a chaos, so the mayor backed down that afternoon. 6031315084cSEdwin Groothuis 6041315084cSEdwin Groothuis# From IATA SSIM (1996-02): 6051315084cSEdwin Groothuis# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS), 606eb1c1a05SSergey Kandaurov# Santa Catarina (SC), Paraná (PR), São Paulo (SP), Rio de Janeiro (RJ), 607eb1c1a05SSergey Kandaurov# Espírito Santo (ES), Minas Gerais (MG), Bahia (BA), Goiás (GO), 6081315084cSEdwin Groothuis# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL]. 6091315084cSEdwin Groothuis# [The last three states are new to this issue of the IATA SSIM.] 6101315084cSEdwin Groothuis 6111315084cSEdwin Groothuis# From Gwillim Law (1996-10-07): 612eb1c1a05SSergey Kandaurov# Geography, history (Tocantins was part of Goiás until 1989), and other 6131315084cSEdwin Groothuis# sources of time zone information lead me to believe that AL, SE, and TO were 6141315084cSEdwin Groothuis# always in BR1, and so the only change was whether or not they observed DST.... 6151315084cSEdwin Groothuis# The earliest issue of the SSIM I have is 2/91. Each issue from then until 6161315084cSEdwin Groothuis# 9/95 says that DST is observed only in the ten states I quoted from 9/95, 6171315084cSEdwin Groothuis# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2 6181315084cSEdwin Groothuis# (UTC-4).... The other two time zones given for Brazil are BR3, which is 6191315084cSEdwin Groothuis# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is 6201315084cSEdwin Groothuis# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's 6211315084cSEdwin Groothuis# become part of the state of Pernambuco). The boundary between BR1 and BR2 6221315084cSEdwin Groothuis# has never been clearly stated. They've simply been called East and West. 6231315084cSEdwin Groothuis# However, some conclusions can be drawn from another IATA manual: the Airline 6241315084cSEdwin Groothuis# Coding Directory, which lists close to 400 airports in Brazil. For each 6251315084cSEdwin Groothuis# airport it gives a time zone which is coded to the SSIM. From that 626eb1c1a05SSergey Kandaurov# information, I'm led to conclude that the states of Amapá (AP), Ceará (CE), 627eb1c1a05SSergey Kandaurov# Maranhão (MA), Paraíba (PR), Pernambuco (PE), Piauí (PI), and Rio Grande do 628eb1c1a05SSergey Kandaurov# Norte (RN), and the eastern part of Pará (PA) are all in BR1 without DST. 6291315084cSEdwin Groothuis 6301315084cSEdwin Groothuis# From Marcos Tadeu (1998-09-27): 631eb1c1a05SSergey Kandaurov# Brazilian official page <http://pcdsh01.on.br/verao1.html> 6321315084cSEdwin Groothuis 633eb1c1a05SSergey Kandaurov# From Jesper Nørgaard (2000-11-03): 6341315084cSEdwin Groothuis# [For an official list of which regions in Brazil use which time zones, see:] 6351315084cSEdwin Groothuis# http://pcdsh01.on.br/Fusbr.htm 6361315084cSEdwin Groothuis# http://pcdsh01.on.br/Fusbrhv.htm 6371315084cSEdwin Groothuis 6381315084cSEdwin Groothuis# From Celso Doria via David Madeo (2002-10-09): 6391315084cSEdwin Groothuis# The reason for the delay this year has to do with elections in Brazil. 6401315084cSEdwin Groothuis# 6411315084cSEdwin Groothuis# Unlike in the United States, elections in Brazil are 100% computerized and 6421315084cSEdwin Groothuis# the results are known almost immediately. Yesterday, it was the first 6431315084cSEdwin Groothuis# round of the elections when 115 million Brazilians voted for President, 6441315084cSEdwin Groothuis# Governor, Senators, Federal Deputies, and State Deputies. Nobody is 6451315084cSEdwin Groothuis# counting (or re-counting) votes anymore and we know there will be a second 6461315084cSEdwin Groothuis# round for the Presidency and also for some Governors. The 2nd round will 6471315084cSEdwin Groothuis# take place on October 27th. 6481315084cSEdwin Groothuis# 6491315084cSEdwin Groothuis# The reason why the DST will only begin November 3rd is that the thousands 6501315084cSEdwin Groothuis# of electoral machines used cannot have their time changed, and since the 6511315084cSEdwin Groothuis# Constitution says the elections must begin at 8:00 AM and end at 5:00 PM, 6521315084cSEdwin Groothuis# the Government decided to postpone DST, instead of changing the Constitution 6531315084cSEdwin Groothuis# (maybe, for the next elections, it will be possible to change the clock)... 6541315084cSEdwin Groothuis 6551315084cSEdwin Groothuis# From Rodrigo Severo (2004-10-04): 6561315084cSEdwin Groothuis# It's just the biannual change made necessary by the much hyped, supposedly 6579f9fc6bbSPhilip Paeps# modern Brazilian ... voting machines which, apparently, can't deal 6581315084cSEdwin Groothuis# with a time change between the first and the second rounds of the elections. 6591315084cSEdwin Groothuis 6601315084cSEdwin Groothuis# From Steffen Thorsen (2007-09-20): 6611315084cSEdwin Groothuis# Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00: 6621315084cSEdwin Groothuis# http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975 6631315084cSEdwin Groothuis 6641315084cSEdwin Groothuis# From Paul Schulze (2008-06-24): 6651315084cSEdwin Groothuis# ...by law number 11.662 of April 24, 2008 (published in the "Diario 666eb1c1a05SSergey Kandaurov# Oficial da União"...) in Brazil there are changes in the timezones, 6671315084cSEdwin Groothuis# effective today (00:00am at June 24, 2008) as follows: 6681315084cSEdwin Groothuis# 6697ce0f064SEdwin Groothuis# a) The timezone UTC+5 is extinguished, with all the Acre state and the 6701315084cSEdwin Groothuis# part of the Amazonas state that had this timezone now being put to the 6711315084cSEdwin Groothuis# timezone UTC+4 672eb1c1a05SSergey Kandaurov# b) The whole Pará state now is put at timezone UTC+3, instead of just 6731315084cSEdwin Groothuis# part of it, as was before. 6741315084cSEdwin Groothuis# 6751315084cSEdwin Groothuis# This change follows a proposal of senator Tiao Viana of Acre state, that 6761315084cSEdwin Groothuis# proposed it due to concerns about open television channels displaying 6771315084cSEdwin Groothuis# programs inappropriate to youths in the states that had the timezone 6781315084cSEdwin Groothuis# UTC+5 too early in the night. In the occasion, some more corrections 6791315084cSEdwin Groothuis# were proposed, trying to unify the timezones of any given state. This 6801315084cSEdwin Groothuis# change modifies timezone rules defined in decree 2.784 of 18 June, 6811315084cSEdwin Groothuis# 1913. 6821315084cSEdwin Groothuis 6831315084cSEdwin Groothuis# From Rodrigo Severo (2008-06-24): 6841315084cSEdwin Groothuis# Just correcting the URL: 6851315084cSEdwin Groothuis# https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008 6861315084cSEdwin Groothuis# 6871315084cSEdwin Groothuis# As a result of the above Decree I believe the America/Rio_Branco 6881315084cSEdwin Groothuis# timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall 689eb1c1a05SSergey Kandaurov# be created to represent the...west side of the Pará State. I 6901315084cSEdwin Groothuis# suggest this new timezone be called Santarem as the most 6911315084cSEdwin Groothuis# important/populated city in the affected area. 6921315084cSEdwin Groothuis# 6931315084cSEdwin Groothuis# This new timezone would be the same as the Rio_Branco timezone up to 6941315084cSEdwin Groothuis# the 2008/06/24 change which would be to UTC-3 instead of UTC-4. 6951315084cSEdwin Groothuis 6961315084cSEdwin Groothuis# From Alex Krivenyshev (2008-06-24): 6971315084cSEdwin Groothuis# This is a quick reference page for New and Old Brazil Time Zones map. 6981315084cSEdwin Groothuis# http://www.worldtimezone.com/brazil-time-new-old.php 6991315084cSEdwin Groothuis# 7001315084cSEdwin Groothuis# - 4 time zones replaced by 3 time zones - eliminating time zone UTC-05 7011315084cSEdwin Groothuis# (state Acre and the part of the Amazonas will be UTC/GMT-04) - western 7021315084cSEdwin Groothuis# part of Par state is moving to one timezone UTC-03 (from UTC-04). 7031315084cSEdwin Groothuis 7041315084cSEdwin Groothuis# From Paul Eggert (2002-10-10): 7051315084cSEdwin Groothuis# The official decrees referenced below are mostly taken from 7067ce0f064SEdwin Groothuis# Decretos sobre o Horário de Verão no Brasil. 7077ce0f064SEdwin Groothuis# http://pcdsh01.on.br/DecHV.html 7081315084cSEdwin Groothuis 7091315084cSEdwin Groothuis# From Steffen Thorsen (2008-08-29): 7101315084cSEdwin Groothuis# As announced by the government and many newspapers in Brazil late 7111315084cSEdwin Groothuis# yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and 7121315084cSEdwin Groothuis# it will end on 2009-02-15 (current rule for Brazil is fine). Based on 7131315084cSEdwin Groothuis# past years experience with the elections, there was a good chance that 7141315084cSEdwin Groothuis# the start was postponed to November, but it did not happen this year. 7151315084cSEdwin Groothuis# 7161315084cSEdwin Groothuis# It has not yet been posted to http://pcdsh01.on.br/DecHV.html 7171315084cSEdwin Groothuis# 7181315084cSEdwin Groothuis# An official page about it: 7191315084cSEdwin Groothuis# http://www.mme.gov.br/site/news/detail.do?newsId=16722 7201315084cSEdwin Groothuis# Note that this link does not always work directly, but must be accessed 7211315084cSEdwin Groothuis# by going to 7221315084cSEdwin Groothuis# http://www.mme.gov.br/first 7231315084cSEdwin Groothuis# 7241315084cSEdwin Groothuis# One example link that works directly: 7251315084cSEdwin Groothuis# http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54 7261315084cSEdwin Groothuis# (Portuguese) 7271315084cSEdwin Groothuis# 7281315084cSEdwin Groothuis# We have a written a short article about it as well: 7298d7edd17SPhilip Paeps# https://www.timeanddate.com/news/time/brazil-dst-2008-2009.html 730958890b7SEdwin Groothuis# 731958890b7SEdwin Groothuis# From Alexander Krivenyshev (2011-10-04): 732958890b7SEdwin Groothuis# State Bahia will return to Daylight savings time this year after 8 years off. 733958890b7SEdwin Groothuis# The announcement was made by Governor Jaques Wagner in an interview to a 734958890b7SEdwin Groothuis# television station in Salvador. 735958890b7SEdwin Groothuis 736958890b7SEdwin Groothuis# In Portuguese: 737958890b7SEdwin Groothuis# http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html 7388d7edd17SPhilip Paeps# https://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html 739958890b7SEdwin Groothuis 740958890b7SEdwin Groothuis# From Guilherme Bernardes Rodrigues (2011-10-07): 741958890b7SEdwin Groothuis# There is news in the media, however there is still no decree about it. 742eb1c1a05SSergey Kandaurov# I just send a e-mail to Zulmira Brandao at http://pcdsh01.on.br/ the 743eb185a68SEdwin Groothuis# official agency about time in Brazil, and she confirmed that the old rule is 744958890b7SEdwin Groothuis# still in force. 7451315084cSEdwin Groothuis 746d6dddab8SEdwin Groothuis# From Guilherme Bernardes Rodrigues (2011-10-14) 747d6dddab8SEdwin Groothuis# It's official, the President signed a decree that includes Bahia in summer 748d6dddab8SEdwin Groothuis# time. 749d6dddab8SEdwin Groothuis# [ and in a second message (same day): ] 750d6dddab8SEdwin Groothuis# I found the decree. 751d6dddab8SEdwin Groothuis# 7526790a258SEdwin Groothuis# DECRETO No. 7.584, DE 13 DE OUTUBRO DE 2011 753d6dddab8SEdwin Groothuis# Link : 754d6dddab8SEdwin Groothuis# http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6 755d6dddab8SEdwin Groothuis 7562029f589SEdwin Groothuis# From Kelley Cook (2012-10-16): 7572029f589SEdwin Groothuis# The governor of state of Bahia in Brazil announced on Thursday that 7582029f589SEdwin Groothuis# due to public pressure, he is reversing the DST policy they implemented 7592029f589SEdwin Groothuis# last year and will not be going to Summer Time on October 21st.... 7602029f589SEdwin Groothuis# http://www.correio24horas.com.br/r/artigo/apos-pressoes-wagner-suspende-horario-de-verao-na-bahia 7612029f589SEdwin Groothuis 7622029f589SEdwin Groothuis# From Rodrigo Severo (2012-10-16): 7632029f589SEdwin Groothuis# Tocantins state will have DST. 7648d7edd17SPhilip Paeps# https://noticias.terra.com.br/brasil/noticias/0,,OI6232536-EI306.html 765d6dddab8SEdwin Groothuis 766c26a5802SEdwin Groothuis# From Steffen Thorsen (2013-09-20): 767c26a5802SEdwin Groothuis# Tocantins in Brazil is very likely not to observe DST from October.... 768c26a5802SEdwin Groothuis# http://conexaoto.com.br/2013/09/18/ministerio-confirma-que-tocantins-esta-fora-do-horario-de-verao-em-2013-mas-falta-publicacao-de-decreto 769c26a5802SEdwin Groothuis# We will keep this article updated when this is confirmed: 7708d7edd17SPhilip Paeps# https://www.timeanddate.com/news/time/brazil-starts-dst-2013.html 771c26a5802SEdwin Groothuis 772c26a5802SEdwin Groothuis# From Steffen Thorsen (2013-10-17): 7738d7edd17SPhilip Paeps# https://www.timeanddate.com/news/time/acre-amazonas-change-time-zone.html 774c26a5802SEdwin Groothuis# Senator Jorge Viana announced that Acre will change time zone on November 10. 775c26a5802SEdwin Groothuis# He did not specify the time of the change, nor if western parts of Amazonas 776c26a5802SEdwin Groothuis# will change as well. 777c26a5802SEdwin Groothuis# 778c26a5802SEdwin Groothuis# From Paul Eggert (2013-10-17): 779c26a5802SEdwin Groothuis# For now, assume western Amazonas will change as well. 780c26a5802SEdwin Groothuis 78112a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 782eb1c1a05SSergey Kandaurov# Decree 20,466 <http://pcdsh01.on.br/HV20466.htm> (1931-10-01) 783eb1c1a05SSergey Kandaurov# Decree 21,896 <http://pcdsh01.on.br/HV21896.htm> (1932-01-10) 78446bee4edSPhilip PaepsRule Brazil 1931 only - Oct 3 11:00 1:00 - 7851315084cSEdwin GroothuisRule Brazil 1932 1933 - Apr 1 0:00 0 - 78646bee4edSPhilip PaepsRule Brazil 1932 only - Oct 3 0:00 1:00 - 787eb1c1a05SSergey Kandaurov# Decree 23,195 <http://pcdsh01.on.br/HV23195.htm> (1933-10-10) 7881315084cSEdwin Groothuis# revoked DST. 789eb1c1a05SSergey Kandaurov# Decree 27,496 <http://pcdsh01.on.br/HV27496.htm> (1949-11-24) 790eb1c1a05SSergey Kandaurov# Decree 27,998 <http://pcdsh01.on.br/HV27998.htm> (1950-04-13) 79146bee4edSPhilip PaepsRule Brazil 1949 1952 - Dec 1 0:00 1:00 - 7921315084cSEdwin GroothuisRule Brazil 1950 only - Apr 16 1:00 0 - 7931315084cSEdwin GroothuisRule Brazil 1951 1952 - Apr 1 0:00 0 - 794eb1c1a05SSergey Kandaurov# Decree 32,308 <http://pcdsh01.on.br/HV32308.htm> (1953-02-24) 7951315084cSEdwin GroothuisRule Brazil 1953 only - Mar 1 0:00 0 - 796eb1c1a05SSergey Kandaurov# Decree 34,724 <http://pcdsh01.on.br/HV34724.htm> (1953-11-30) 7971315084cSEdwin Groothuis# revoked DST. 798eb1c1a05SSergey Kandaurov# Decree 52,700 <http://pcdsh01.on.br/HV52700.htm> (1963-10-18) 7991315084cSEdwin Groothuis# established DST from 1963-10-23 00:00 to 1964-02-29 00:00 8001315084cSEdwin Groothuis# in SP, RJ, GB, MG, ES, due to the prolongation of the drought. 801eb1c1a05SSergey Kandaurov# Decree 53,071 <http://pcdsh01.on.br/HV53071.htm> (1963-12-03) 8021315084cSEdwin Groothuis# extended the above decree to all of the national territory on 12-09. 80346bee4edSPhilip PaepsRule Brazil 1963 only - Dec 9 0:00 1:00 - 804eb1c1a05SSergey Kandaurov# Decree 53,604 <http://pcdsh01.on.br/HV53604.htm> (1964-02-25) 8051315084cSEdwin Groothuis# extended summer time by one day to 1964-03-01 00:00 (start of school). 8061315084cSEdwin GroothuisRule Brazil 1964 only - Mar 1 0:00 0 - 807eb1c1a05SSergey Kandaurov# Decree 55,639 <http://pcdsh01.on.br/HV55639.htm> (1965-01-27) 80846bee4edSPhilip PaepsRule Brazil 1965 only - Jan 31 0:00 1:00 - 8091315084cSEdwin GroothuisRule Brazil 1965 only - Mar 31 0:00 0 - 810eb1c1a05SSergey Kandaurov# Decree 57,303 <http://pcdsh01.on.br/HV57303.htm> (1965-11-22) 81146bee4edSPhilip PaepsRule Brazil 1965 only - Dec 1 0:00 1:00 - 812eb1c1a05SSergey Kandaurov# Decree 57,843 <http://pcdsh01.on.br/HV57843.htm> (1966-02-18) 8131315084cSEdwin GroothuisRule Brazil 1966 1968 - Mar 1 0:00 0 - 81446bee4edSPhilip PaepsRule Brazil 1966 1967 - Nov 1 0:00 1:00 - 815eb1c1a05SSergey Kandaurov# Decree 63,429 <http://pcdsh01.on.br/HV63429.htm> (1968-10-15) 8161315084cSEdwin Groothuis# revoked DST. 817eb1c1a05SSergey Kandaurov# Decree 91,698 <http://pcdsh01.on.br/HV91698.htm> (1985-09-27) 81846bee4edSPhilip PaepsRule Brazil 1985 only - Nov 2 0:00 1:00 - 8191315084cSEdwin Groothuis# Decree 92,310 (1986-01-21) 8201315084cSEdwin Groothuis# Decree 92,463 (1986-03-13) 8211315084cSEdwin GroothuisRule Brazil 1986 only - Mar 15 0:00 0 - 8221315084cSEdwin Groothuis# Decree 93,316 (1986-10-01) 82346bee4edSPhilip PaepsRule Brazil 1986 only - Oct 25 0:00 1:00 - 8241315084cSEdwin GroothuisRule Brazil 1987 only - Feb 14 0:00 0 - 825eb1c1a05SSergey Kandaurov# Decree 94,922 <http://pcdsh01.on.br/HV94922.htm> (1987-09-22) 82646bee4edSPhilip PaepsRule Brazil 1987 only - Oct 25 0:00 1:00 - 8271315084cSEdwin GroothuisRule Brazil 1988 only - Feb 7 0:00 0 - 828eb1c1a05SSergey Kandaurov# Decree 96,676 <http://pcdsh01.on.br/HV96676.htm> (1988-09-12) 8291315084cSEdwin Groothuis# except for the states of AC, AM, PA, RR, RO, and AP (then a territory) 83046bee4edSPhilip PaepsRule Brazil 1988 only - Oct 16 0:00 1:00 - 8311315084cSEdwin GroothuisRule Brazil 1989 only - Jan 29 0:00 0 - 832eb1c1a05SSergey Kandaurov# Decree 98,077 <http://pcdsh01.on.br/HV98077.htm> (1989-08-21) 8331315084cSEdwin Groothuis# with the same exceptions 83446bee4edSPhilip PaepsRule Brazil 1989 only - Oct 15 0:00 1:00 - 8351315084cSEdwin GroothuisRule Brazil 1990 only - Feb 11 0:00 0 - 836eb1c1a05SSergey Kandaurov# Decree 99,530 <http://pcdsh01.on.br/HV99530.htm> (1990-09-17) 8371315084cSEdwin Groothuis# adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF. 8381315084cSEdwin Groothuis# Decree 99,629 (1990-10-19) adds BA, MT. 83946bee4edSPhilip PaepsRule Brazil 1990 only - Oct 21 0:00 1:00 - 8401315084cSEdwin GroothuisRule Brazil 1991 only - Feb 17 0:00 0 - 841eb1c1a05SSergey Kandaurov# Unnumbered decree <http://pcdsh01.on.br/HV1991.htm> (1991-09-25) 8421315084cSEdwin Groothuis# adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF. 84346bee4edSPhilip PaepsRule Brazil 1991 only - Oct 20 0:00 1:00 - 8441315084cSEdwin GroothuisRule Brazil 1992 only - Feb 9 0:00 0 - 845eb1c1a05SSergey Kandaurov# Unnumbered decree <http://pcdsh01.on.br/HV1992.htm> (1992-10-16) 8461315084cSEdwin Groothuis# adopted by same states. 84746bee4edSPhilip PaepsRule Brazil 1992 only - Oct 25 0:00 1:00 - 8481315084cSEdwin GroothuisRule Brazil 1993 only - Jan 31 0:00 0 - 849eb1c1a05SSergey Kandaurov# Decree 942 <http://pcdsh01.on.br/HV942.htm> (1993-09-28) 8501315084cSEdwin Groothuis# adopted by same states, plus AM. 851eb1c1a05SSergey Kandaurov# Decree 1,252 <http://pcdsh01.on.br/HV1252.htm> (1994-09-22; 8521315084cSEdwin Groothuis# web page corrected 2004-01-07) adopted by same states, minus AM. 853eb1c1a05SSergey Kandaurov# Decree 1,636 <http://pcdsh01.on.br/HV1636.htm> (1995-09-14) 8541315084cSEdwin Groothuis# adopted by same states, plus MT and TO. 855eb1c1a05SSergey Kandaurov# Decree 1,674 <http://pcdsh01.on.br/HV1674.htm> (1995-10-13) 8561315084cSEdwin Groothuis# adds AL, SE. 85746bee4edSPhilip PaepsRule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 - 8581315084cSEdwin GroothuisRule Brazil 1994 1995 - Feb Sun>=15 0:00 0 - 8591315084cSEdwin GroothuisRule Brazil 1996 only - Feb 11 0:00 0 - 860eb1c1a05SSergey Kandaurov# Decree 2,000 <http://pcdsh01.on.br/HV2000.htm> (1996-09-04) 8611315084cSEdwin Groothuis# adopted by same states, minus AL, SE. 86246bee4edSPhilip PaepsRule Brazil 1996 only - Oct 6 0:00 1:00 - 8631315084cSEdwin GroothuisRule Brazil 1997 only - Feb 16 0:00 0 - 8641315084cSEdwin Groothuis# From Daniel C. Sobral (1998-02-12): 8651315084cSEdwin Groothuis# In 1997, the DS began on October 6. The stated reason was that 8661315084cSEdwin Groothuis# because international television networks ignored Brazil's policy on DS, 8671315084cSEdwin Groothuis# they bought the wrong times on satellite for coverage of Pope's visit. 8681315084cSEdwin Groothuis# This year, the ending date of DS was postponed to March 1 8691315084cSEdwin Groothuis# to help dealing with the shortages of electric power. 8701315084cSEdwin Groothuis# 8711315084cSEdwin Groothuis# Decree 2,317 (1997-09-04), adopted by same states. 87246bee4edSPhilip PaepsRule Brazil 1997 only - Oct 6 0:00 1:00 - 873eb1c1a05SSergey Kandaurov# Decree 2,495 <http://pcdsh01.on.br/figuras/HV2495.JPG> 8741315084cSEdwin Groothuis# (1998-02-10) 8751315084cSEdwin GroothuisRule Brazil 1998 only - Mar 1 0:00 0 - 876eb1c1a05SSergey Kandaurov# Decree 2,780 <http://pcdsh01.on.br/figuras/Hv98.jpg> (1998-09-11) 8771315084cSEdwin Groothuis# adopted by the same states as before. 87846bee4edSPhilip PaepsRule Brazil 1998 only - Oct 11 0:00 1:00 - 8791315084cSEdwin GroothuisRule Brazil 1999 only - Feb 21 0:00 0 - 880eb1c1a05SSergey Kandaurov# Decree 3,150 <http://pcdsh01.on.br/figuras/HV3150.gif> 8811315084cSEdwin Groothuis# (1999-08-23) adopted by same states. 882eb1c1a05SSergey Kandaurov# Decree 3,188 <http://pcdsh01.on.br/DecHV99.gif> (1999-09-30) 8831315084cSEdwin Groothuis# adds SE, AL, PB, PE, RN, CE, PI, MA and RR. 88446bee4edSPhilip PaepsRule Brazil 1999 only - Oct 3 0:00 1:00 - 8851315084cSEdwin GroothuisRule Brazil 2000 only - Feb 27 0:00 0 - 886eb1c1a05SSergey Kandaurov# Decree 3,592 <http://pcdsh01.on.br/DEC3592.htm> (2000-09-06) 8871315084cSEdwin Groothuis# adopted by the same states as before. 888eb1c1a05SSergey Kandaurov# Decree 3,630 <http://pcdsh01.on.br/Dec3630.jpg> (2000-10-13) 8891315084cSEdwin Groothuis# repeals DST in PE and RR, effective 2000-10-15 00:00. 890eb1c1a05SSergey Kandaurov# Decree 3,632 <http://pcdsh01.on.br/Dec3632.jpg> (2000-10-17) 8911315084cSEdwin Groothuis# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00. 892eb1c1a05SSergey Kandaurov# Decree 3,916 <http://pcdsh01.on.br/figuras/HV3916.gif> 8931315084cSEdwin Groothuis# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE. 89446bee4edSPhilip PaepsRule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 - 8951315084cSEdwin GroothuisRule Brazil 2001 2006 - Feb Sun>=15 0:00 0 - 8961315084cSEdwin Groothuis# Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE. 897eb1c1a05SSergey Kandaurov# 4,399 <http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm> 89846bee4edSPhilip PaepsRule Brazil 2002 only - Nov 3 0:00 1:00 - 8991315084cSEdwin Groothuis# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO. 900eb1c1a05SSergey Kandaurov# 4,844 <http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm> 90146bee4edSPhilip PaepsRule Brazil 2003 only - Oct 19 0:00 1:00 - 9021315084cSEdwin Groothuis# Decree 5,223 (2004-10-01) reestablishes DST in MT. 903eb1c1a05SSergey Kandaurov# 5,223 <http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm> 90446bee4edSPhilip PaepsRule Brazil 2004 only - Nov 2 0:00 1:00 - 905eb1c1a05SSergey Kandaurov# Decree 5,539 <http://pcdsh01.on.br/DecHV5539.gif> (2005-09-19), 9061315084cSEdwin Groothuis# adopted by the same states as before. 90746bee4edSPhilip PaepsRule Brazil 2005 only - Oct 16 0:00 1:00 - 908eb1c1a05SSergey Kandaurov# Decree 5,920 <http://pcdsh01.on.br/DecHV5920.gif> (2006-10-03), 9091315084cSEdwin Groothuis# adopted by the same states as before. 91046bee4edSPhilip PaepsRule Brazil 2006 only - Nov 5 0:00 1:00 - 9111315084cSEdwin GroothuisRule Brazil 2007 only - Feb 25 0:00 0 - 912eb1c1a05SSergey Kandaurov# Decree 6,212 <http://pcdsh01.on.br/DecHV6212.gif> (2007-09-26), 9131315084cSEdwin Groothuis# adopted by the same states as before. 91446bee4edSPhilip PaepsRule Brazil 2007 only - Oct Sun>=8 0:00 1:00 - 9151315084cSEdwin Groothuis# From Frederico A. C. Neves (2008-09-10): 916875f3108SEdwin Groothuis# According to this decree 9171315084cSEdwin Groothuis# http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm 9181315084cSEdwin Groothuis# [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the 9191315084cSEdwin Groothuis# 3rd Feb Sunday. There is an exception on the return date when this is 9201315084cSEdwin Groothuis# the Carnival Sunday then the return date will be the next Sunday... 92146bee4edSPhilip PaepsRule Brazil 2008 2017 - Oct Sun>=15 0:00 1:00 - 9221315084cSEdwin GroothuisRule Brazil 2008 2011 - Feb Sun>=15 0:00 0 - 923f2fcff28SPhilip Paeps# Decree 7,584 <http://pcdsh01.on.br/HVdecreto7584_20111013.jpg> (2011-10-13) 924f2fcff28SPhilip Paeps# added Bahia. 9251315084cSEdwin GroothuisRule Brazil 2012 only - Feb Sun>=22 0:00 0 - 926f2fcff28SPhilip Paeps# Decree 7,826 <http://pcdsh01.on.br/HVdecreto7826_20121015.jpg> (2012-10-15) 927f2fcff28SPhilip Paeps# removed Bahia and added Tocantins. 928f2fcff28SPhilip Paeps# Decree 8,112 <http://pcdsh01.on.br/HVdecreto8112_20130930.JPG> (2013-09-30) 929f2fcff28SPhilip Paeps# removed Tocantins. 9301315084cSEdwin GroothuisRule Brazil 2013 2014 - Feb Sun>=15 0:00 0 - 9311315084cSEdwin GroothuisRule Brazil 2015 only - Feb Sun>=22 0:00 0 - 9322865ab3fSPhilip PaepsRule Brazil 2016 2019 - Feb Sun>=15 0:00 0 - 933f2fcff28SPhilip Paeps# From Steffen Thorsen (2017-12-18): 934f2fcff28SPhilip Paeps# According to many media sources, next year's DST start in Brazil will move to 9352865ab3fSPhilip Paeps# the first Sunday of November 936f2fcff28SPhilip Paeps# ... https://www.timeanddate.com/news/time/brazil-delays-dst-2018.html 937f2fcff28SPhilip Paeps# From Steffen Thorsen (2017-12-20): 938f2fcff28SPhilip Paeps# http://www.planalto.gov.br/ccivil_03/_ato2015-2018/2017/decreto/D9242.htm 93989abb9f8SPhilip Paeps# From Fábio Gomes (2018-10-04): 94089abb9f8SPhilip Paeps# The Brazilian president just announced a new change on this year DST. 94189abb9f8SPhilip Paeps# It was scheduled to start on November 4th and it was changed to November 18th. 94289abb9f8SPhilip Paeps# From Rodrigo Brüning Wessler (2018-10-15): 94389abb9f8SPhilip Paeps# The Brazilian government just announced that the change in DST was 94489abb9f8SPhilip Paeps# canceled.... Maybe the president Michel Temer also woke up one hour 94589abb9f8SPhilip Paeps# earlier today. :) 9462865ab3fSPhilip PaepsRule Brazil 2018 only - Nov Sun>=1 0:00 1:00 - 9472865ab3fSPhilip Paeps# The last ruleset listed above says that the following states observed DST: 9481315084cSEdwin Groothuis# DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP. 9492865ab3fSPhilip Paeps# 9502865ab3fSPhilip Paeps# From Steffen Thorsen (2019-04-05): 9512865ab3fSPhilip Paeps# According to multiple sources the Brazilian president wants to get rid of DST. 9522865ab3fSPhilip Paeps# https://gmconline.com.br/noticias/politica/bolsonaro-horario-de-verao-deve-acabar-este-ano 9532865ab3fSPhilip Paeps# https://g1.globo.com/economia/noticia/2019/04/05/governo-anuncia-fim-do-horario-de-verao.ghtml 9542865ab3fSPhilip Paeps# From Marcus Diniz (2019-04-25): 9552865ab3fSPhilip Paeps# Brazil no longer has DST changes - decree signed today 9562865ab3fSPhilip Paeps# https://g1.globo.com/politica/noticia/2019/04/25/bolsonaro-assina-decreto-que-acaba-com-o-horario-de-verao.ghtml 9572865ab3fSPhilip Paeps# From Daniel Soares de Oliveira (2019-04-26): 9582865ab3fSPhilip Paeps# http://www.planalto.gov.br/ccivil_03/_Ato2019-2022/2019/Decreto/D9772.htm 9591315084cSEdwin Groothuis 9602865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 9611315084cSEdwin Groothuis# 9621315084cSEdwin Groothuis# Fernando de Noronha (administratively part of PE) 9631315084cSEdwin GroothuisZone America/Noronha -2:09:40 - LMT 1914 964dc135c6eSBaptiste Daroussin -2:00 Brazil -02/-01 1990 Sep 17 965dc135c6eSBaptiste Daroussin -2:00 - -02 1999 Sep 30 966dc135c6eSBaptiste Daroussin -2:00 Brazil -02/-01 2000 Oct 15 967dc135c6eSBaptiste Daroussin -2:00 - -02 2001 Sep 13 968dc135c6eSBaptiste Daroussin -2:00 Brazil -02/-01 2002 Oct 1 969dc135c6eSBaptiste Daroussin -2:00 - -02 9701315084cSEdwin Groothuis# Other Atlantic islands have no permanent settlement. 971eb1c1a05SSergey Kandaurov# These include Trindade and Martim Vaz (administratively part of ES), 972eb1c1a05SSergey Kandaurov# Rocas Atoll (RN), and the St Peter and St Paul Archipelago (PE). 9731315084cSEdwin Groothuis# Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01; 9741315084cSEdwin Groothuis# it also included the Penedos. 9751315084cSEdwin Groothuis# 976eb1c1a05SSergey Kandaurov# Amapá (AP), east Pará (PA) 977eb1c1a05SSergey Kandaurov# East Pará includes Belém, Marabá, Serra Norte, and São Félix do Xingu. 978eb1c1a05SSergey Kandaurov# The division between east and west Pará is the river Xingu. 9791315084cSEdwin Groothuis# In the north a very small part from the river Javary (now Jari I guess, 980eb1c1a05SSergey Kandaurov# the border with Amapá) to the Amazon, then to the Xingu. 9811315084cSEdwin GroothuisZone America/Belem -3:13:56 - LMT 1914 982dc135c6eSBaptiste Daroussin -3:00 Brazil -03/-02 1988 Sep 12 983dc135c6eSBaptiste Daroussin -3:00 - -03 9841315084cSEdwin Groothuis# 985eb1c1a05SSergey Kandaurov# west Pará (PA) 986eb1c1a05SSergey Kandaurov# West Pará includes Altamira, Óbidos, Prainha, Oriximiná, and Santarém. 9871315084cSEdwin GroothuisZone America/Santarem -3:38:48 - LMT 1914 988dc135c6eSBaptiste Daroussin -4:00 Brazil -04/-03 1988 Sep 12 989dc135c6eSBaptiste Daroussin -4:00 - -04 2008 Jun 24 0:00 990dc135c6eSBaptiste Daroussin -3:00 - -03 9911315084cSEdwin Groothuis# 992eb1c1a05SSergey Kandaurov# Maranhão (MA), Piauí (PI), Ceará (CE), Rio Grande do Norte (RN), 993eb1c1a05SSergey Kandaurov# Paraíba (PB) 9941315084cSEdwin GroothuisZone America/Fortaleza -2:34:00 - LMT 1914 995dc135c6eSBaptiste Daroussin -3:00 Brazil -03/-02 1990 Sep 17 996dc135c6eSBaptiste Daroussin -3:00 - -03 1999 Sep 30 997dc135c6eSBaptiste Daroussin -3:00 Brazil -03/-02 2000 Oct 22 998dc135c6eSBaptiste Daroussin -3:00 - -03 2001 Sep 13 999dc135c6eSBaptiste Daroussin -3:00 Brazil -03/-02 2002 Oct 1 1000dc135c6eSBaptiste Daroussin -3:00 - -03 10011315084cSEdwin Groothuis# 10021315084cSEdwin Groothuis# Pernambuco (PE) (except Atlantic islands) 10031315084cSEdwin GroothuisZone America/Recife -2:19:36 - LMT 1914 1004dc135c6eSBaptiste Daroussin -3:00 Brazil -03/-02 1990 Sep 17 1005dc135c6eSBaptiste Daroussin -3:00 - -03 1999 Sep 30 1006dc135c6eSBaptiste Daroussin -3:00 Brazil -03/-02 2000 Oct 15 1007dc135c6eSBaptiste Daroussin -3:00 - -03 2001 Sep 13 1008dc135c6eSBaptiste Daroussin -3:00 Brazil -03/-02 2002 Oct 1 1009dc135c6eSBaptiste Daroussin -3:00 - -03 10101315084cSEdwin Groothuis# 10111315084cSEdwin Groothuis# Tocantins (TO) 10121315084cSEdwin GroothuisZone America/Araguaina -3:12:48 - LMT 1914 1013dc135c6eSBaptiste Daroussin -3:00 Brazil -03/-02 1990 Sep 17 1014dc135c6eSBaptiste Daroussin -3:00 - -03 1995 Sep 14 1015dc135c6eSBaptiste Daroussin -3:00 Brazil -03/-02 2003 Sep 24 1016dc135c6eSBaptiste Daroussin -3:00 - -03 2012 Oct 21 1017dc135c6eSBaptiste Daroussin -3:00 Brazil -03/-02 2013 Sep 1018dc135c6eSBaptiste Daroussin -3:00 - -03 10191315084cSEdwin Groothuis# 10201315084cSEdwin Groothuis# Alagoas (AL), Sergipe (SE) 10211315084cSEdwin GroothuisZone America/Maceio -2:22:52 - LMT 1914 1022dc135c6eSBaptiste Daroussin -3:00 Brazil -03/-02 1990 Sep 17 1023dc135c6eSBaptiste Daroussin -3:00 - -03 1995 Oct 13 1024dc135c6eSBaptiste Daroussin -3:00 Brazil -03/-02 1996 Sep 4 1025dc135c6eSBaptiste Daroussin -3:00 - -03 1999 Sep 30 1026dc135c6eSBaptiste Daroussin -3:00 Brazil -03/-02 2000 Oct 22 1027dc135c6eSBaptiste Daroussin -3:00 - -03 2001 Sep 13 1028dc135c6eSBaptiste Daroussin -3:00 Brazil -03/-02 2002 Oct 1 1029dc135c6eSBaptiste Daroussin -3:00 - -03 10301315084cSEdwin Groothuis# 10311315084cSEdwin Groothuis# Bahia (BA) 10321315084cSEdwin Groothuis# There are too many Salvadors elsewhere, so use America/Bahia instead 10331315084cSEdwin Groothuis# of America/Salvador. 10341315084cSEdwin GroothuisZone America/Bahia -2:34:04 - LMT 1914 1035dc135c6eSBaptiste Daroussin -3:00 Brazil -03/-02 2003 Sep 24 1036dc135c6eSBaptiste Daroussin -3:00 - -03 2011 Oct 16 1037dc135c6eSBaptiste Daroussin -3:00 Brazil -03/-02 2012 Oct 21 1038dc135c6eSBaptiste Daroussin -3:00 - -03 10391315084cSEdwin Groothuis# 1040eb1c1a05SSergey Kandaurov# Goiás (GO), Distrito Federal (DF), Minas Gerais (MG), 1041eb1c1a05SSergey Kandaurov# Espírito Santo (ES), Rio de Janeiro (RJ), São Paulo (SP), Paraná (PR), 10421315084cSEdwin Groothuis# Santa Catarina (SC), Rio Grande do Sul (RS) 10431315084cSEdwin GroothuisZone America/Sao_Paulo -3:06:28 - LMT 1914 1044dc135c6eSBaptiste Daroussin -3:00 Brazil -03/-02 1963 Oct 23 0:00 1045dc135c6eSBaptiste Daroussin -3:00 1:00 -02 1964 1046dc135c6eSBaptiste Daroussin -3:00 Brazil -03/-02 10471315084cSEdwin Groothuis# 10481315084cSEdwin Groothuis# Mato Grosso do Sul (MS) 10491315084cSEdwin GroothuisZone America/Campo_Grande -3:38:28 - LMT 1914 1050dc135c6eSBaptiste Daroussin -4:00 Brazil -04/-03 10511315084cSEdwin Groothuis# 10521315084cSEdwin Groothuis# Mato Grosso (MT) 10531315084cSEdwin GroothuisZone America/Cuiaba -3:44:20 - LMT 1914 1054dc135c6eSBaptiste Daroussin -4:00 Brazil -04/-03 2003 Sep 24 1055dc135c6eSBaptiste Daroussin -4:00 - -04 2004 Oct 1 1056dc135c6eSBaptiste Daroussin -4:00 Brazil -04/-03 10571315084cSEdwin Groothuis# 1058eb1c1a05SSergey Kandaurov# Rondônia (RO) 10591315084cSEdwin GroothuisZone America/Porto_Velho -4:15:36 - LMT 1914 1060dc135c6eSBaptiste Daroussin -4:00 Brazil -04/-03 1988 Sep 12 1061dc135c6eSBaptiste Daroussin -4:00 - -04 10621315084cSEdwin Groothuis# 10631315084cSEdwin Groothuis# Roraima (RR) 10641315084cSEdwin GroothuisZone America/Boa_Vista -4:02:40 - LMT 1914 1065dc135c6eSBaptiste Daroussin -4:00 Brazil -04/-03 1988 Sep 12 1066dc135c6eSBaptiste Daroussin -4:00 - -04 1999 Sep 30 1067dc135c6eSBaptiste Daroussin -4:00 Brazil -04/-03 2000 Oct 15 1068dc135c6eSBaptiste Daroussin -4:00 - -04 10691315084cSEdwin Groothuis# 1070eb1c1a05SSergey Kandaurov# east Amazonas (AM): Boca do Acre, Jutaí, Manaus, Floriano Peixoto 10711315084cSEdwin Groothuis# The great circle line from Tabatinga to Porto Acre divides 10721315084cSEdwin Groothuis# east from west Amazonas. 10731315084cSEdwin GroothuisZone America/Manaus -4:00:04 - LMT 1914 1074dc135c6eSBaptiste Daroussin -4:00 Brazil -04/-03 1988 Sep 12 1075dc135c6eSBaptiste Daroussin -4:00 - -04 1993 Sep 28 1076dc135c6eSBaptiste Daroussin -4:00 Brazil -04/-03 1994 Sep 22 1077dc135c6eSBaptiste Daroussin -4:00 - -04 10781315084cSEdwin Groothuis# 10791315084cSEdwin Groothuis# west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant, 1080eb1c1a05SSergey Kandaurov# Eirunepé, Envira, Ipixuna 10811315084cSEdwin GroothuisZone America/Eirunepe -4:39:28 - LMT 1914 1082dc135c6eSBaptiste Daroussin -5:00 Brazil -05/-04 1988 Sep 12 1083dc135c6eSBaptiste Daroussin -5:00 - -05 1993 Sep 28 1084dc135c6eSBaptiste Daroussin -5:00 Brazil -05/-04 1994 Sep 22 1085dc135c6eSBaptiste Daroussin -5:00 - -05 2008 Jun 24 0:00 1086dc135c6eSBaptiste Daroussin -4:00 - -04 2013 Nov 10 1087dc135c6eSBaptiste Daroussin -5:00 - -05 10881315084cSEdwin Groothuis# 10891315084cSEdwin Groothuis# Acre (AC) 10901315084cSEdwin GroothuisZone America/Rio_Branco -4:31:12 - LMT 1914 1091dc135c6eSBaptiste Daroussin -5:00 Brazil -05/-04 1988 Sep 12 1092dc135c6eSBaptiste Daroussin -5:00 - -05 2008 Jun 24 0:00 1093dc135c6eSBaptiste Daroussin -4:00 - -04 2013 Nov 10 1094dc135c6eSBaptiste Daroussin -5:00 - -05 10951315084cSEdwin Groothuis 10961315084cSEdwin Groothuis# Chile 10971315084cSEdwin Groothuis 10988ea5af2bSPhilip Paeps# From Paul Eggert (2022-03-15): 10999f23d940SEdwin Groothuis# Shanks & Pottenger says America/Santiago introduced standard time in 1100f2fcff28SPhilip Paeps# 1890 and rounds its UT offset to 70W40; guess that in practice this 11019f23d940SEdwin Groothuis# was the same offset as in 1916-1919. It also says Pacific/Easter 11029f23d940SEdwin Groothuis# standardized on 109W22 in 1890; assume this didn't change the clocks. 11039f23d940SEdwin Groothuis# 11049f23d940SEdwin Groothuis# Dates for America/Santiago from 1910 to 2004 are primarily from 11059f23d940SEdwin Groothuis# the following source, cited by Oscar van Vlijmen (2006-10-08): 11069f23d940SEdwin Groothuis# [1] Chile Law 11079f23d940SEdwin Groothuis# http://www.webexhibits.org/daylightsaving/chile.html 11088d7edd17SPhilip Paeps# This contains a copy of this official table: 11099f23d940SEdwin Groothuis# Cambios en la hora oficial de Chile desde 1900 (retrieved 2008-03-30) 11108d7edd17SPhilip Paeps# https://web.archive.org/web/20080330200901/http://www.horaoficial.cl/cambio.htm 11119f23d940SEdwin Groothuis# [1] needs several corrections, though. 11129f23d940SEdwin Groothuis# 11139f23d940SEdwin Groothuis# The first set of corrections is from: 11149f23d940SEdwin Groothuis# [2] History of the Official Time of Chile 11159f23d940SEdwin Groothuis# http://www.horaoficial.cl/ing/horaof_ing.html (retrieved 2012-03-06). See: 11168d7edd17SPhilip Paeps# https://web.archive.org/web/20120306042032/http://www.horaoficial.cl/ing/horaof_ing.html 11179f23d940SEdwin Groothuis# This is an English translation of: 11189f23d940SEdwin Groothuis# Historia de la hora oficial de Chile (retrieved 2012-10-24). See: 11198d7edd17SPhilip Paeps# https://web.archive.org/web/20121024234627/http://www.horaoficial.cl/horaof.htm 11209f23d940SEdwin Groothuis# A fancier Spanish version (requiring mouse-clicking) is at: 11218ea5af2bSPhilip Paeps# http://www.horaoficial.cl/historia_hora.php 11229f23d940SEdwin Groothuis# Conflicts between [1] and [2] were resolved as follows: 11239f23d940SEdwin Groothuis# 11249f23d940SEdwin Groothuis# - [1] says the 1910 transition was Jan 1, [2] says Jan 10 and cites 11256790a258SEdwin Groothuis# Boletín No. 1, Aviso No. 1 (1910). Go with [2]. 11269f23d940SEdwin Groothuis# 11279f23d940SEdwin Groothuis# - [1] says SMT was -4:42:45, [2] says Chile's official time from 11289f23d940SEdwin Groothuis# 1916 to 1919 was -4:42:46.3, the meridian of Chile's National 11299f23d940SEdwin Groothuis# Astronomical Observatory (OAN), then located in what is now 11308ea5af2bSPhilip Paeps# Quinta Normal in Santiago. Go with [1], as this matches the meridian 11318ea5af2bSPhilip Paeps# referred to by the relevant Chilean laws to this day. 11329f23d940SEdwin Groothuis# 11339f23d940SEdwin Groothuis# - [1] says the 1918 transition was Sep 1, [2] says Sep 10 and cites 11346790a258SEdwin Groothuis# Boletín No. 22, Aviso No. 129/1918 (1918-08-23). Go with [2]. 11359f23d940SEdwin Groothuis# 11369f23d940SEdwin Groothuis# - [1] does not give times for transitions; assume they occur 11379f23d940SEdwin Groothuis# at midnight mainland time, the current common practice. However, 11389f23d940SEdwin Groothuis# go with [2]'s specification of 23:00 for the 1947-05-21 transition. 11399f23d940SEdwin Groothuis# 11409f23d940SEdwin Groothuis# Another correction to [1] is from Jesper Nørgaard Welen, who 11419f23d940SEdwin Groothuis# wrote (2006-10-08), "I think that there are some obvious mistakes in 11429f23d940SEdwin Groothuis# the suggested link from Oscar van Vlijmen,... for instance entry 66 11439f23d940SEdwin Groothuis# says that GMT-4 ended 1990-09-12 while entry 67 only begins GMT-3 at 11449f23d940SEdwin Groothuis# 1990-09-15 (they should have been 1990-09-15 and 1990-09-16 11459f23d940SEdwin Groothuis# respectively), but anyhow it clears up some doubts too." 11469f23d940SEdwin Groothuis# 11479f23d940SEdwin Groothuis# Data for Pacific/Easter from 1910 through 1967 come from Shanks & 11489f23d940SEdwin Groothuis# Pottenger. After that, for lack of better info assume 11499f23d940SEdwin Groothuis# Pacific/Easter is always two hours behind America/Santiago; 11509f23d940SEdwin Groothuis# this is known to work for DST transitions starting in 2008 and 11519f23d940SEdwin Groothuis# may well be true for earlier transitions. 11529f23d940SEdwin Groothuis 11539f9fc6bbSPhilip Paeps# From Tim Parenti (2022-07-06): 11548ea5af2bSPhilip Paeps# For a brief period of roughly six weeks in 1946, DST was only observed on an 11558ea5af2bSPhilip Paeps# emergency basis in specific regions of central Chile; namely, "the national 11568ea5af2bSPhilip Paeps# territory between the provinces of Coquimbo and Concepción, inclusive". 11578ea5af2bSPhilip Paeps# This was enacted by Decree 3,891, dated 1946-07-13, and took effect 11588ea5af2bSPhilip Paeps# 1946-07-14 24:00, advancing these central regions to -03. 11598ea5af2bSPhilip Paeps# https://www.diariooficial.interior.gob.cl/versiones-anteriores/do-h/19460715/#page/1 11608ea5af2bSPhilip Paeps# The decree contemplated "[t]hat this advancement of the Official Time, even 11618ea5af2bSPhilip Paeps# though it has been proposed for the cities of Santiago and Valparaíso only, 11628ea5af2bSPhilip Paeps# must be agreed with that of other cities, due to the connection of various 11638ea5af2bSPhilip Paeps# activities that require it, such as, for example, the operation of rail 11648ea5af2bSPhilip Paeps# services". It was originally set to expire after 30 days but was extended 11658ea5af2bSPhilip Paeps# through 1946-08-31 by Decree 4,506, dated 1946-08-13. 11668ea5af2bSPhilip Paeps# https://www.diariooficial.interior.gob.cl/versiones-anteriores/do-h/19460814/#page/1 11678ea5af2bSPhilip Paeps# 11688ea5af2bSPhilip Paeps# Law Number 8,522, promulgated 1946-08-27, reunified Chilean clocks at their 11698ea5af2bSPhilip Paeps# new "Summer Time" of -04, reckoned as that of "the meridian of the 11708ea5af2bSPhilip Paeps# Astronomical Observatory of Lo Espejo, advanced by 42 minutes and 45 11719f9fc6bbSPhilip Paeps# seconds". Although this law specified the new Summer Time to start on 1 11729f9fc6bbSPhilip Paeps# September each year, a special "transitional article" started it a few days 11739f9fc6bbSPhilip Paeps# early, as soon as the law took effect. As the law was to take force "from 11749f9fc6bbSPhilip Paeps# the date of its publication in the 'Diario Oficial', which happened the 11759f9fc6bbSPhilip Paeps# following day, presume the change took place in Santiago and its environs 11769f9fc6bbSPhilip Paeps# from 24:00 -03 to 23:00 -04 on Wednesday 1946-08-28. Although this was a 11779f9fc6bbSPhilip Paeps# no-op for wall clocks in the north and south of the country, put their formal 11789f9fc6bbSPhilip Paeps# start to DST an hour later when they reached 24:00 -04. 11798ea5af2bSPhilip Paeps# https://www.diariooficial.interior.gob.cl/versiones-anteriores/do-h/19460828/#page/1 11808ea5af2bSPhilip Paeps# After a brief "Winter Time" stint at -05 beginning 1947-04-01, Law Number 11818ea5af2bSPhilip Paeps# 8,777, promulgated 1947-05-17, established year-round -04 "from 23:00 on the 11828ea5af2bSPhilip Paeps# second day after it is published in the 'Diario Oficial'." It was published 11838ea5af2bSPhilip Paeps# on Monday 1947-05-19 and so took effect from Wednesday 1947-05-21 23:00. 11848ea5af2bSPhilip Paeps# https://www.diariooficial.interior.gob.cl/versiones-anteriores/do-h/19470519/#page/1 11858ea5af2bSPhilip Paeps 11861315084cSEdwin Groothuis# From Eduardo Krell (1995-10-19): 11871315084cSEdwin Groothuis# The law says to switch to DST at midnight [24:00] on the second SATURDAY 11881315084cSEdwin Groothuis# of October.... The law is the same for March and October. 11891315084cSEdwin Groothuis# (1998-09-29): 11901315084cSEdwin Groothuis# Because of the drought this year, the government decided to go into 11911315084cSEdwin Groothuis# DST earlier (saturday 9/26 at 24:00). This is a one-time change only ... 11921315084cSEdwin Groothuis# (unless there's another dry season next year, I guess). 11931315084cSEdwin Groothuis 11941315084cSEdwin Groothuis# From Julio I. Pacheco Troncoso (1999-03-18): 11951315084cSEdwin Groothuis# Because of the same drought, the government decided to end DST later, 11961315084cSEdwin Groothuis# on April 3, (one-time change). 11971315084cSEdwin Groothuis 1198eb1c1a05SSergey Kandaurov# From Germán Poo-Caamaño (2008-03-03): 11991315084cSEdwin Groothuis# Due to drought, Chile extends Daylight Time in three weeks. This 12001315084cSEdwin Groothuis# is one-time change (Saturday 3/29 at 24:00 for America/Santiago 12011315084cSEdwin Groothuis# and Saturday 3/29 at 22:00 for Pacific/Easter) 12021315084cSEdwin Groothuis# The Supreme Decree is located at 12031315084cSEdwin Groothuis# http://www.shoa.cl/servicios/supremo316.pdf 12049f23d940SEdwin Groothuis# 1205eb1c1a05SSergey Kandaurov# From José Miguel Garrido (2008-03-05): 12061315084cSEdwin Groothuis# http://www.shoa.cl/noticias/2008/04hora/hora.htm 12071315084cSEdwin Groothuis 1208157fb21cSEdwin Groothuis# From Angel Chiang (2010-03-04): 1209157fb21cSEdwin Groothuis# Subject: DST in Chile exceptionally extended to 3 April due to earthquake 1210157fb21cSEdwin Groothuis# http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098 1211157fb21cSEdwin Groothuis# 12127ce0f064SEdwin Groothuis# From Arthur David Olson (2010-03-06): 1213157fb21cSEdwin Groothuis# Angel Chiang's message confirmed by Julio Pacheco; Julio provided a patch. 1214157fb21cSEdwin Groothuis 1215d58b52acSEdwin Groothuis# From Glenn Eychaner (2011-03-28): 1216d58b52acSEdwin Groothuis# http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E} 1217d58b52acSEdwin Groothuis# In English: 1218d58b52acSEdwin Groothuis# Chile's clocks will go back an hour this year on the 7th of May instead 1219d58b52acSEdwin Groothuis# of this Saturday. They will go forward again the 3rd Saturday in 12209f23d940SEdwin Groothuis# August, not in October as they have since 1968. 1221d58b52acSEdwin Groothuis 1222aad8a35cSEdwin Groothuis# From Mauricio Parada (2012-02-22), translated by Glenn Eychaner (2012-02-23): 1223aad8a35cSEdwin Groothuis# As stated in the website of the Chilean Energy Ministry 1224aad8a35cSEdwin Groothuis# http://www.minenergia.cl/ministerio/noticias/generales/gobierno-anuncia-fechas-de-cambio-de.html 1225aad8a35cSEdwin Groothuis# The Chilean Government has decided to postpone the entrance into winter time 12269f23d940SEdwin Groothuis# (to leave DST) from March 11 2012 to April 28th 2012.... 1227aad8a35cSEdwin Groothuis# Quote from the website communication: 1228aad8a35cSEdwin Groothuis# 1229aad8a35cSEdwin Groothuis# 6. For the year 2012, the dates of entry into winter time will be as follows: 1230aad8a35cSEdwin Groothuis# a. Saturday April 28, 2012, clocks should go back 60 minutes; that is, at 1231aad8a35cSEdwin Groothuis# 23:59:59, instead of passing to 0:00, the time should be adjusted to be 23:00 1232aad8a35cSEdwin Groothuis# of the same day. 1233aad8a35cSEdwin Groothuis# b. Saturday, September 1, 2012, clocks should go forward 60 minutes; that is, 1234aad8a35cSEdwin Groothuis# at 23:59:59, instead of passing to 0:00, the time should be adjusted to be 1235aad8a35cSEdwin Groothuis# 01:00 on September 2. 1236eb185a68SEdwin Groothuis 1237eb185a68SEdwin Groothuis# From Steffen Thorsen (2013-02-15): 1238eb185a68SEdwin Groothuis# According to several news sources, Chile has extended DST this year, 1239eb185a68SEdwin Groothuis# they will end DST later and start DST earlier than planned. They 1240eb185a68SEdwin Groothuis# hope to save energy. The new end date is 2013-04-28 00:00 and new 1241eb185a68SEdwin Groothuis# start date is 2013-09-08 00:00.... 1242eb185a68SEdwin Groothuis# http://www.gob.cl/informa/2013/02/15/gobierno-anuncia-fechas-de-cambio-de-hora-para-el-ano-2013.htm 1243aad8a35cSEdwin Groothuis 1244eb1c1a05SSergey Kandaurov# From José Miguel Garrido (2014-02-19): 1245890859c7SEdwin Groothuis# Today appeared in the Diario Oficial a decree amending the time change 1246890859c7SEdwin Groothuis# dates to 2014. 1247890859c7SEdwin Groothuis# DST End: last Saturday of April 2014 (Sun 27 Apr 2014 03:00 UTC) 1248890859c7SEdwin Groothuis# DST Start: first Saturday of September 2014 (Sun 07 Sep 2014 04:00 UTC) 1249890859c7SEdwin Groothuis# http://www.diariooficial.interior.gob.cl//media/2014/02/19/do-20140219.pdf 1250890859c7SEdwin Groothuis 125174d26aa7SEdwin Groothuis# From Eduardo Romero Urra (2015-03-03): 125274d26aa7SEdwin Groothuis# Today has been published officially that Chile will use the DST time 125374d26aa7SEdwin Groothuis# permanently until March 25 of 2017 125474d26aa7SEdwin Groothuis# http://www.diariooficial.interior.gob.cl/media/2015/03/03/1-large.jpg 125574d26aa7SEdwin Groothuis# 125674d26aa7SEdwin Groothuis# From Paul Eggert (2015-03-03): 125774d26aa7SEdwin Groothuis# For now, assume that the extension will persist indefinitely. 12582627f31fSEdwin Groothuis 12598fdf5721SBaptiste Daroussin# From Juan Correa (2016-03-18): 12608fdf5721SBaptiste Daroussin# The decree regarding DST has been published in today's Official Gazette: 12618fdf5721SBaptiste Daroussin# http://www.diariooficial.interior.gob.cl/versiones-anteriores/do/20160318/ 12628fdf5721SBaptiste Daroussin# http://www.leychile.cl/Navegar?idNorma=1088502 12638fdf5721SBaptiste Daroussin# It does consider the second Saturday of May and August as the dates 12648fdf5721SBaptiste Daroussin# for the transition; and it lists DST dates until 2019, but I think 12658fdf5721SBaptiste Daroussin# this scheme will stick. 12668fdf5721SBaptiste Daroussin# 12678fdf5721SBaptiste Daroussin# From Paul Eggert (2016-03-18): 12688fdf5721SBaptiste Daroussin# For now, assume the pattern holds for the indefinite future. 12698fdf5721SBaptiste Daroussin# The decree says transitions occur at 24:00; in practice this appears 12708fdf5721SBaptiste Daroussin# to mean 24:00 mainland time, not 24:00 local time, so that Easter 12718fdf5721SBaptiste Daroussin# Island is always two hours behind the mainland. 12728fdf5721SBaptiste Daroussin 1273dc135c6eSBaptiste Daroussin# From Juan Correa (2016-12-04): 1274dc135c6eSBaptiste Daroussin# Magallanes region ... will keep DST (UTC -3) all year round.... 1275dc135c6eSBaptiste Daroussin# 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 1276dc135c6eSBaptiste Daroussin# From Deborah Goldsmith (2017-01-19): 1277dc135c6eSBaptiste Daroussin# http://www.diariooficial.interior.gob.cl/publicaciones/2017/01/17/41660/01/1169626.pdf 1278dc135c6eSBaptiste Daroussin 127989abb9f8SPhilip Paeps# From Juan Correa (2018-08-13): 128089abb9f8SPhilip Paeps# As of moments ago, the Ministry of Energy in Chile has announced the new 128189abb9f8SPhilip Paeps# schema for DST. ... Announcement in video (in Spanish): 128289abb9f8SPhilip Paeps# https://twitter.com/MinEnergia/status/1029000399129374720 128389abb9f8SPhilip Paeps# From Yonathan Dossow (2018-08-13): 128489abb9f8SPhilip Paeps# The video says "first Saturday of September", we all know it means Sunday at 128589abb9f8SPhilip Paeps# midnight. 128689abb9f8SPhilip Paeps# From Tim Parenti (2018-08-13): 128789abb9f8SPhilip Paeps# Translating the captions on the video at 0:44-0:55, "We want to announce as 128889abb9f8SPhilip Paeps# Government that from 2019, Winter Time will be increased to 5 months, between 128989abb9f8SPhilip Paeps# the first Saturday of April and the first Saturday of September." 129089abb9f8SPhilip Paeps# At 2:08-2:20, "The Magallanes region will maintain its current time, as 129189abb9f8SPhilip Paeps# decided by the citizens during 2017, but our Government will promote a 129289abb9f8SPhilip Paeps# regional dialogue table to gather their opinion on this matter." 129389abb9f8SPhilip Paeps# https://twitter.com/MinEnergia/status/1029009354001973248 129489abb9f8SPhilip Paeps# "We will keep the new time policy unchanged for at least the next 4 years." 129589abb9f8SPhilip Paeps# So we extend the new rules on Saturdays at 24:00 mainland time indefinitely. 12962865ab3fSPhilip Paeps# From Juan Correa (2019-02-04): 12972865ab3fSPhilip Paeps# http://www.diariooficial.interior.gob.cl/publicaciones/2018/11/23/42212/01/1498738.pdf 12989f9fc6bbSPhilip Paeps 12999f9fc6bbSPhilip Paeps# From Juan Correa (2022-04-02): 13009f9fc6bbSPhilip Paeps# I found there was a decree published last Thursday that will keep 13019f9fc6bbSPhilip Paeps# Magallanes region to UTC -3 "indefinitely". The decree is available at 13029f9fc6bbSPhilip Paeps# https://www.diariooficial.interior.gob.cl/publicaciones/2022/03/31/43217-B/01/2108910.pdf 13039f9fc6bbSPhilip Paeps 13049f9fc6bbSPhilip Paeps# From Juan Correa (2022-08-09): 13059f9fc6bbSPhilip Paeps# the Internal Affairs Ministry (Ministerio del Interior) informed DST 13069f9fc6bbSPhilip Paeps# for America/Santiago will start on midnight of September 11th; 13079f9fc6bbSPhilip Paeps# and will end on April 1st, 2023. Magallanes region (America/Punta_Arenas) 13089f9fc6bbSPhilip Paeps# will keep UTC -3 "indefinitely"... This is because on September 4th 13091576451aSPhilip Paeps# we will have a voting whether to approve a new Constitution. 13101576451aSPhilip Paeps# 13111576451aSPhilip Paeps# From Eduardo Romero Urra (2022-08-17): 13121576451aSPhilip Paeps# https://www.diariooficial.interior.gob.cl/publicaciones/2022/08/13/43327/01/2172567.pdf 13131576451aSPhilip Paeps# 13141576451aSPhilip Paeps# From Paul Eggert (2022-08-17): 13151576451aSPhilip Paeps# Although the presidential decree stops at fall 2026, assume that 13161576451aSPhilip Paeps# similar DST rules will continue thereafter. 131789abb9f8SPhilip Paeps 131812a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 131946bee4edSPhilip PaepsRule Chile 1927 1931 - Sep 1 0:00 1:00 - 13201315084cSEdwin GroothuisRule Chile 1928 1932 - Apr 1 0:00 0 - 132146bee4edSPhilip PaepsRule Chile 1968 only - Nov 3 4:00u 1:00 - 13221315084cSEdwin GroothuisRule Chile 1969 only - Mar 30 3:00u 0 - 132346bee4edSPhilip PaepsRule Chile 1969 only - Nov 23 4:00u 1:00 - 13241315084cSEdwin GroothuisRule Chile 1970 only - Mar 29 3:00u 0 - 13251315084cSEdwin GroothuisRule Chile 1971 only - Mar 14 3:00u 0 - 132646bee4edSPhilip PaepsRule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 - 13271315084cSEdwin GroothuisRule Chile 1972 1986 - Mar Sun>=9 3:00u 0 - 132846bee4edSPhilip PaepsRule Chile 1973 only - Sep 30 4:00u 1:00 - 132946bee4edSPhilip PaepsRule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 - 13301315084cSEdwin GroothuisRule Chile 1987 only - Apr 12 3:00u 0 - 13319f23d940SEdwin GroothuisRule Chile 1988 1990 - Mar Sun>=9 3:00u 0 - 133246bee4edSPhilip PaepsRule Chile 1988 1989 - Oct Sun>=9 4:00u 1:00 - 133346bee4edSPhilip PaepsRule Chile 1990 only - Sep 16 4:00u 1:00 - 13341315084cSEdwin GroothuisRule Chile 1991 1996 - Mar Sun>=9 3:00u 0 - 133546bee4edSPhilip PaepsRule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 - 13361315084cSEdwin GroothuisRule Chile 1997 only - Mar 30 3:00u 0 - 13371315084cSEdwin GroothuisRule Chile 1998 only - Mar Sun>=9 3:00u 0 - 133846bee4edSPhilip PaepsRule Chile 1998 only - Sep 27 4:00u 1:00 - 13391315084cSEdwin GroothuisRule Chile 1999 only - Apr 4 3:00u 0 - 134046bee4edSPhilip PaepsRule Chile 1999 2010 - Oct Sun>=9 4:00u 1:00 - 13411315084cSEdwin GroothuisRule Chile 2000 2007 - Mar Sun>=9 3:00u 0 - 13421315084cSEdwin Groothuis# N.B.: the end of March 29 in Chile is March 30 in Universal time, 13431315084cSEdwin Groothuis# which is used below in specifying the transition. 13441315084cSEdwin GroothuisRule Chile 2008 only - Mar 30 3:00u 0 - 1345157fb21cSEdwin GroothuisRule Chile 2009 only - Mar Sun>=9 3:00u 0 - 1346d58b52acSEdwin GroothuisRule Chile 2010 only - Apr Sun>=1 3:00u 0 - 1347d58b52acSEdwin GroothuisRule Chile 2011 only - May Sun>=2 3:00u 0 - 134846bee4edSPhilip PaepsRule Chile 2011 only - Aug Sun>=16 4:00u 1:00 - 13498fdf5721SBaptiste DaroussinRule Chile 2012 2014 - Apr Sun>=23 3:00u 0 - 135046bee4edSPhilip PaepsRule Chile 2012 2014 - Sep Sun>=2 4:00u 1:00 - 135189abb9f8SPhilip PaepsRule Chile 2016 2018 - May Sun>=9 3:00u 0 - 135289abb9f8SPhilip PaepsRule Chile 2016 2018 - Aug Sun>=9 4:00u 1:00 - 135389abb9f8SPhilip PaepsRule Chile 2019 max - Apr Sun>=2 3:00u 0 - 13549f9fc6bbSPhilip PaepsRule Chile 2019 2021 - Sep Sun>=2 4:00u 1:00 - 13559f9fc6bbSPhilip PaepsRule Chile 2022 only - Sep Sun>=9 4:00u 1:00 - 13569f9fc6bbSPhilip PaepsRule Chile 2023 max - Sep Sun>=2 4:00u 1:00 - 13571315084cSEdwin Groothuis# IATA SSIM anomalies: (1992-02) says 1992-03-14; 13581315084cSEdwin Groothuis# (1996-09) says 1998-03-08. Ignore these. 13592865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 13608ea5af2bSPhilip PaepsZone America/Santiago -4:42:45 - LMT 1890 13618ea5af2bSPhilip Paeps -4:42:45 - SMT 1910 Jan 10 # Santiago Mean Time 1362dc135c6eSBaptiste Daroussin -5:00 - -05 1916 Jul 1 13638ea5af2bSPhilip Paeps -4:42:45 - SMT 1918 Sep 10 1364dc135c6eSBaptiste Daroussin -4:00 - -04 1919 Jul 1 13658ea5af2bSPhilip Paeps -4:42:45 - SMT 1927 Sep 1 1366dc135c6eSBaptiste Daroussin -5:00 Chile -05/-04 1932 Sep 1 1367dc135c6eSBaptiste Daroussin -4:00 - -04 1942 Jun 1 1368dc135c6eSBaptiste Daroussin -5:00 - -05 1942 Aug 1 13699f9fc6bbSPhilip Paeps -4:00 - -04 1946 Jul 14 24:00 13709f9fc6bbSPhilip Paeps -4:00 1:00 -03 1946 Aug 28 24:00 # central CL 13719f9fc6bbSPhilip Paeps -5:00 1:00 -04 1947 Mar 31 24:00 1372dc135c6eSBaptiste Daroussin -5:00 - -05 1947 May 21 23:00 1373dc135c6eSBaptiste Daroussin -4:00 Chile -04/-03 1374dc135c6eSBaptiste DaroussinZone America/Punta_Arenas -4:43:40 - LMT 1890 13758ea5af2bSPhilip Paeps -4:42:45 - SMT 1910 Jan 10 1376dc135c6eSBaptiste Daroussin -5:00 - -05 1916 Jul 1 13778ea5af2bSPhilip Paeps -4:42:45 - SMT 1918 Sep 10 1378dc135c6eSBaptiste Daroussin -4:00 - -04 1919 Jul 1 13798ea5af2bSPhilip Paeps -4:42:45 - SMT 1927 Sep 1 1380dc135c6eSBaptiste Daroussin -5:00 Chile -05/-04 1932 Sep 1 1381dc135c6eSBaptiste Daroussin -4:00 - -04 1942 Jun 1 1382dc135c6eSBaptiste Daroussin -5:00 - -05 1942 Aug 1 13839f9fc6bbSPhilip Paeps -4:00 - -04 1946 Aug 28 24:00 13849f9fc6bbSPhilip Paeps -5:00 1:00 -04 1947 Mar 31 24:00 1385dc135c6eSBaptiste Daroussin -5:00 - -05 1947 May 21 23:00 1386dc135c6eSBaptiste Daroussin -4:00 Chile -04/-03 2016 Dec 4 1387dc135c6eSBaptiste Daroussin -3:00 - -03 13889f23d940SEdwin GroothuisZone Pacific/Easter -7:17:28 - LMT 1890 13891315084cSEdwin Groothuis -7:17:28 - EMT 1932 Sep # Easter Mean Time 1390dc135c6eSBaptiste Daroussin -7:00 Chile -07/-06 1982 Mar 14 3:00u # Easter Time 1391dc135c6eSBaptiste Daroussin -6:00 Chile -06/-05 13921315084cSEdwin Groothuis# 1393eb1c1a05SSergey Kandaurov# Salas y Gómez Island is uninhabited. 1394eb1c1a05SSergey Kandaurov# Other Chilean locations, including Juan Fernández Is, Desventuradas Is, 1395eb1c1a05SSergey Kandaurov# and Antarctic bases, are like America/Santiago. 13961315084cSEdwin Groothuis 13979f23d940SEdwin Groothuis# Antarctic base using South American rules 13989f23d940SEdwin Groothuis# (See the file 'antarctica' for more.) 13999f23d940SEdwin Groothuis# 14009f23d940SEdwin Groothuis# Palmer, Anvers Island, since 1965 (moved 2 miles in 1968) 14019f23d940SEdwin Groothuis# 14029f23d940SEdwin Groothuis# From Ethan Dicks (1996-10-06): 14039f23d940SEdwin Groothuis# It keeps the same time as Punta Arenas, Chile, because, just like us 14049f23d940SEdwin Groothuis# and the South Pole, that's the other end of their supply line.... 14059f23d940SEdwin Groothuis# I verified with someone who was there that since 1980, 14069f23d940SEdwin Groothuis# Palmer has followed Chile. Prior to that, before the Falklands War, 14079f23d940SEdwin Groothuis# Palmer used to be supplied from Argentina. 14089f23d940SEdwin Groothuis# 14092865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 14108fdf5721SBaptiste DaroussinZone Antarctica/Palmer 0 - -00 1965 1411dc135c6eSBaptiste Daroussin -4:00 Arg -04/-03 1969 Oct 5 1412dc135c6eSBaptiste Daroussin -3:00 Arg -03/-02 1982 May 1413dc135c6eSBaptiste Daroussin -4:00 Chile -04/-03 2016 Dec 4 1414dc135c6eSBaptiste Daroussin -3:00 - -03 14159f23d940SEdwin Groothuis 14161315084cSEdwin Groothuis# Colombia 1417eb185a68SEdwin Groothuis 14189f9fc6bbSPhilip Paeps# Milne gives 4:56:16.4 for Bogotá time in 1899. He writes, 1419eb185a68SEdwin Groothuis# "A variation of fifteen minutes in the public clocks of Bogota is not rare." 1420eb185a68SEdwin Groothuis 1421cf1ad535SPhilip Paeps# From Alois Treindl (2022-11-10): 1422cf1ad535SPhilip Paeps# End of time change in Colombia 1993 ... should be 6 February 24h ... 1423cf1ad535SPhilip Paeps# DECRETO 267 DE 1993 1424cf1ad535SPhilip Paeps# https://www.suin-juriscol.gov.co/viewDocument.asp?ruta=Decretos/1061335 1425cf1ad535SPhilip Paeps 142612a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 142746bee4edSPhilip PaepsRule CO 1992 only - May 3 0:00 1:00 - 1428cf1ad535SPhilip PaepsRule CO 1993 only - Feb 6 24:00 0 - 14292865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 14309f9fc6bbSPhilip Paeps #STDOFF -4:56:16.4 1431eb185a68SEdwin GroothuisZone America/Bogota -4:56:16 - LMT 1884 Mar 13 1432eb1c1a05SSergey Kandaurov -4:56:16 - BMT 1914 Nov 23 # Bogotá Mean Time 1433dc135c6eSBaptiste Daroussin -5:00 CO -05/-04 14341315084cSEdwin Groothuis# Malpelo, Providencia, San Andres 14351315084cSEdwin Groothuis# no information; probably like America/Bogota 14361315084cSEdwin Groothuis 143714808f13SEdwin Groothuis 14381315084cSEdwin Groothuis# Ecuador 14391315084cSEdwin Groothuis# 1440eb1c1a05SSergey Kandaurov# Milne says the Central and South American Telegraph Company used -5:24:15. 1441eb185a68SEdwin Groothuis# 1442dc135c6eSBaptiste Daroussin# From Alois Treindl (2016-12-15): 14438d7edd17SPhilip Paeps# https://www.elcomercio.com/actualidad/hora-sixto-1993.html 1444dc135c6eSBaptiste Daroussin# ... Whether the law applied also to Galápagos, I do not know. 1445dc135c6eSBaptiste Daroussin# From Paul Eggert (2016-12-15): 14468d7edd17SPhilip Paeps# https://www.elcomercio.com/afull/modificacion-husohorario-ecuador-presidentes-decreto.html 1447dc135c6eSBaptiste Daroussin# This says President Sixto Durán Ballén signed decree No. 285, which 1448dc135c6eSBaptiste Daroussin# established DST from 1992-11-28 to 1993-02-05; it does not give transition 1449dc135c6eSBaptiste Daroussin# times. The people called it "hora de Sixto" ("Sixto hour"). The change did 1450dc135c6eSBaptiste Daroussin# not go over well; a popular song "Qué hora es" by Jaime Guevara had lyrics 1451dc135c6eSBaptiste Daroussin# that included "Amanecía en mitad de la noche, los guaguas iban a clase sin 1452dc135c6eSBaptiste Daroussin# sol" ("It was dawning in the middle of the night, the buses went to class 1453dc135c6eSBaptiste Daroussin# without sun"). Although Ballén's campaign slogan was "Ni un paso atrás" 1454dc135c6eSBaptiste Daroussin# (Not one step back), the clocks went back in 1993 and the experiment was not 1455dc135c6eSBaptiste Daroussin# repeated. For now, assume transitions were at 00:00 local time country-wide. 1456dc135c6eSBaptiste Daroussin# 145712a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 145846bee4edSPhilip PaepsRule Ecuador 1992 only - Nov 28 0:00 1:00 - 1459dc135c6eSBaptiste DaroussinRule Ecuador 1993 only - Feb 5 0:00 0 - 14601315084cSEdwin Groothuis# 14612865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 14621315084cSEdwin GroothuisZone America/Guayaquil -5:19:20 - LMT 1890 14631315084cSEdwin Groothuis -5:14:00 - QMT 1931 # Quito Mean Time 1464dc135c6eSBaptiste Daroussin -5:00 Ecuador -05/-04 14651315084cSEdwin GroothuisZone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno 1466dc135c6eSBaptiste Daroussin -5:00 - -05 1986 1467dc135c6eSBaptiste Daroussin -6:00 Ecuador -06/-05 14681315084cSEdwin Groothuis 14691315084cSEdwin Groothuis# Falklands 14701315084cSEdwin Groothuis 14711315084cSEdwin Groothuis# From Paul Eggert (2006-03-22): 14721315084cSEdwin Groothuis# Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except 14731315084cSEdwin Groothuis# the IATA gives 1996-09-08. Go with Shanks & Pottenger. 14741315084cSEdwin Groothuis 14751315084cSEdwin Groothuis# From Falkland Islands Government Office, London (2001-01-22) 1476eb1c1a05SSergey Kandaurov# via Jesper Nørgaard: 14771315084cSEdwin Groothuis# ... the clocks revert back to Local Mean Time at 2 am on Sunday 15 14781315084cSEdwin Groothuis# April 2001 and advance one hour to summer time at 2 am on Sunday 2 14791315084cSEdwin Groothuis# September. It is anticipated that the clocks will revert back at 2 14801315084cSEdwin Groothuis# am on Sunday 21 April 2002 and advance to summer time at 2 am on 14811315084cSEdwin Groothuis# Sunday 1 September. 14821315084cSEdwin Groothuis 14831315084cSEdwin Groothuis# From Rives McDow (2001-02-13): 14841315084cSEdwin Groothuis# 14851315084cSEdwin Groothuis# I have communicated several times with people there, and the last 14861315084cSEdwin Groothuis# time I had communications that was helpful was in 1998. Here is 14871315084cSEdwin Groothuis# what was said then: 14881315084cSEdwin Groothuis# 14891315084cSEdwin Groothuis# "The general rule was that Stanley used daylight saving and the Camp 14901315084cSEdwin Groothuis# did not. However for various reasons many people in the Camp have 14911315084cSEdwin Groothuis# started to use daylight saving (known locally as 'Stanley Time') 14921315084cSEdwin Groothuis# There is no rule as to who uses daylight saving - it is a matter of 14931315084cSEdwin Groothuis# personal choice and so it is impossible to draw a map showing who 14941315084cSEdwin Groothuis# uses it and who does not. Any list would be out of date as soon as 14951315084cSEdwin Groothuis# it was produced. This year daylight saving ended on April 18/19th 14961315084cSEdwin Groothuis# and started again on September 12/13th. I do not know what the rule 14971315084cSEdwin Groothuis# is, but can find out if you like. We do not change at the same time 14981315084cSEdwin Groothuis# as UK or Chile." 14991315084cSEdwin Groothuis# 15001315084cSEdwin Groothuis# I did have in my notes that the rule was "Second Saturday in Sep at 15011315084cSEdwin Groothuis# 0:00 until third Saturday in Apr at 0:00". I think that this does 15021315084cSEdwin Groothuis# not agree in some cases with Shanks; is this true? 15031315084cSEdwin Groothuis# 15041315084cSEdwin Groothuis# Also, there is no mention in the list that some areas in the 15051315084cSEdwin Groothuis# Falklands do not use DST. I have found in my communications there 15061315084cSEdwin Groothuis# that these areas are on the western half of East Falkland and all of 15071315084cSEdwin Groothuis# West Falkland. Stanley is the only place that consistently observes 15081315084cSEdwin Groothuis# DST. Again, as in other places in the world, the farmers don't like 15091315084cSEdwin Groothuis# it. West Falkland is almost entirely sheep farmers. 15101315084cSEdwin Groothuis# 15111315084cSEdwin Groothuis# I know one lady there that keeps a list of which farm keeps DST and 15121315084cSEdwin Groothuis# which doesn't each year. She runs a shop in Stanley, and says that 15131315084cSEdwin Groothuis# the list changes each year. She uses it to communicate to her 15141315084cSEdwin Groothuis# customers, catching them when they are home for lunch or dinner. 15151315084cSEdwin Groothuis 15161315084cSEdwin Groothuis# From Paul Eggert (2001-03-05): 15171315084cSEdwin Groothuis# For now, we'll just record the time in Stanley, since we have no 15181315084cSEdwin Groothuis# better info. 15191315084cSEdwin Groothuis 152010f603b0SEdwin Groothuis# From Steffen Thorsen (2011-04-01): 152110f603b0SEdwin Groothuis# The Falkland Islands will not turn back clocks this winter, but stay on 152210f603b0SEdwin Groothuis# daylight saving time. 152310f603b0SEdwin Groothuis# 152410f603b0SEdwin Groothuis# One source: 152510f603b0SEdwin Groothuis# http://www.falklandnews.com/public/story.cfm?get=5914&source=3 152610f603b0SEdwin Groothuis# 152710f603b0SEdwin Groothuis# We have gotten this confirmed by a clerk of the legislative assembly: 152810f603b0SEdwin Groothuis# Normally the clocks revert to Local Mean Time (UTC/GMT -4 hours) on the 152910f603b0SEdwin Groothuis# third Sunday of April at 0200hrs and advance to Summer Time (UTC/GMT -3 153010f603b0SEdwin Groothuis# hours) on the first Sunday of September at 0200hrs. 153110f603b0SEdwin Groothuis# 153210f603b0SEdwin Groothuis# IMPORTANT NOTE: During 2011, on a trial basis, the Falkland Islands 153310f603b0SEdwin Groothuis# will not revert to local mean time, but clocks will remain on Summer 153410f603b0SEdwin Groothuis# time (UTC/GMT - 3 hours) throughout the whole of 2011. Any long term 153510f603b0SEdwin Groothuis# change to local time following the trial period will be notified. 1536aad8a35cSEdwin Groothuis# 1537aad8a35cSEdwin Groothuis# From Andrew Newman (2012-02-24) 1538aad8a35cSEdwin Groothuis# A letter from Justin McPhee, Chief Executive, 1539aad8a35cSEdwin Groothuis# Cable & Wireless Falkland Islands (dated 2012-02-22) 1540aad8a35cSEdwin Groothuis# states... 1541aad8a35cSEdwin Groothuis# The current Atlantic/Stanley entry under South America expects the 1542aad8a35cSEdwin Groothuis# clocks to go back to standard Falklands Time (FKT) on the 15th April. 1543aad8a35cSEdwin Groothuis# The database entry states that in 2011 Stanley was staying on fixed 1544aad8a35cSEdwin Groothuis# summer time on a trial basis only. FIG need to contact IANA and/or 1545aad8a35cSEdwin Groothuis# the maintainers of the database to inform them we're adopting 1546aad8a35cSEdwin Groothuis# the same policy this year and suggest recommendations for future years. 1547aad8a35cSEdwin Groothuis# 154846bee4edSPhilip Paeps# For now we will assume permanent -03 for the Falklands 1549aad8a35cSEdwin Groothuis# until advised differently (to apply for 2012 and beyond, after the 2011 1550aad8a35cSEdwin Groothuis# experiment was apparently successful.) 155112a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 155246bee4edSPhilip PaepsRule Falk 1937 1938 - Sep lastSun 0:00 1:00 - 15531315084cSEdwin GroothuisRule Falk 1938 1942 - Mar Sun>=19 0:00 0 - 155446bee4edSPhilip PaepsRule Falk 1939 only - Oct 1 0:00 1:00 - 155546bee4edSPhilip PaepsRule Falk 1940 1942 - Sep lastSun 0:00 1:00 - 15561315084cSEdwin GroothuisRule Falk 1943 only - Jan 1 0:00 0 - 155746bee4edSPhilip PaepsRule Falk 1983 only - Sep lastSun 0:00 1:00 - 15581315084cSEdwin GroothuisRule Falk 1984 1985 - Apr lastSun 0:00 0 - 155946bee4edSPhilip PaepsRule Falk 1984 only - Sep 16 0:00 1:00 - 156046bee4edSPhilip PaepsRule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 - 15611315084cSEdwin GroothuisRule Falk 1986 2000 - Apr Sun>=16 0:00 0 - 156210f603b0SEdwin GroothuisRule Falk 2001 2010 - Apr Sun>=15 2:00 0 - 156346bee4edSPhilip PaepsRule Falk 2001 2010 - Sep Sun>=1 2:00 1:00 - 15642865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 15651315084cSEdwin GroothuisZone Atlantic/Stanley -3:51:24 - LMT 1890 15661315084cSEdwin Groothuis -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time 1567dc135c6eSBaptiste Daroussin -4:00 Falk -04/-03 1983 May 1568dc135c6eSBaptiste Daroussin -3:00 Falk -03/-02 1985 Sep 15 1569dc135c6eSBaptiste Daroussin -4:00 Falk -04/-03 2010 Sep 5 2:00 1570dc135c6eSBaptiste Daroussin -3:00 - -03 15711315084cSEdwin Groothuis 15721315084cSEdwin Groothuis# French Guiana 15732723c7ffSPhilip Paeps# For the 1911/1912 establishment of standard time in French possessions, see: 15742723c7ffSPhilip Paeps# Société Française de Physique, Recueil de constantes physiques (1913), 15752723c7ffSPhilip Paeps# page 752, 18b. 15762865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 15772723c7ffSPhilip PaepsZone America/Cayenne -3:29:20 - LMT 1911 Jul 1 1578dc135c6eSBaptiste Daroussin -4:00 - -04 1967 Oct 1579dc135c6eSBaptiste Daroussin -3:00 - -03 15801315084cSEdwin Groothuis 15811315084cSEdwin Groothuis# Guyana 158294c2d487SPhilip Paeps 158394c2d487SPhilip Paeps# From P Chan (2020-11-27): 158494c2d487SPhilip Paeps# https://books.google.com/books?id=5-5CAQAAMAAJ&pg=SA1-PA547 158594c2d487SPhilip Paeps# The Official Gazette of British Guiana. (New Series.) Vol. XL. July to 158694c2d487SPhilip Paeps# December, 1915, p 1547, lists as several notes: 158794c2d487SPhilip Paeps# "Local Mean Time 3 hours 52 mins. 39 secs. slow of Greenwich Mean Time 158894c2d487SPhilip Paeps# (Georgetown.) From 1st August, 1911, British Guiana Standard Mean Time 4 158994c2d487SPhilip Paeps# hours slow of Greenwich Mean Time, by notice in Official Gazette on 1st July, 159094c2d487SPhilip Paeps# 1911. From 1st March, 1915, British Guiana Standard Mean Time 3 hours 45 159194c2d487SPhilip Paeps# mins. 0 secs. slow of Greenwich Mean Time, by notice in Official Gazette on 159294c2d487SPhilip Paeps# 23rd January, 1915." 159394c2d487SPhilip Paeps# 159494c2d487SPhilip Paeps# https://parliament.gov.gy/documents/acts/10923-act_no._27_of_1975_-_interpretation_and_general_clauses_(amendment)_act_1975.pdf 159594c2d487SPhilip Paeps# Interpretation and general clauses (Amendment) Act 1975 (Act No. 27 of 1975) 159694c2d487SPhilip Paeps# [dated 1975-07-31] 159794c2d487SPhilip Paeps# "This Act...shall come into operation on 1st August, 1975." 159894c2d487SPhilip Paeps# "...where any expression of time occurs...the time referred to shall signify 159994c2d487SPhilip Paeps# the standard time of Guyana which shall be three hours behind Greenwich Mean 160094c2d487SPhilip Paeps# Time." 160194c2d487SPhilip Paeps# 160294c2d487SPhilip Paeps# Circular No. 10/1992 dated 1992-03-20 160394c2d487SPhilip Paeps# https://dps.gov.gy/wp-content/uploads/2018/12/1992-03-20-Circular-010.pdf 160494c2d487SPhilip Paeps# "...cabinet has decided that with effect from Sunday 29th March, 1992, Guyana 160594c2d487SPhilip Paeps# Standard Time would be re-established at 01:00 hours by adjusting the hands 160694c2d487SPhilip Paeps# of the clock back to 24:00 hours." 160794c2d487SPhilip Paeps# Legislated in the Interpretation and general clauses (Amendment) Act 1992 160894c2d487SPhilip Paeps# (Act No. 6 of 1992) [passed 1992-03-27, published 1992-04-18] 160994c2d487SPhilip Paeps# https://parliament.gov.gy/documents/acts/5885-6_of_1992_interpretation_and_general_clauses_(amendment)_act_1992.pdf 161094c2d487SPhilip Paeps 16112865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 161294c2d487SPhilip PaepsZone America/Guyana -3:52:39 - LMT 1911 Aug 1 # Georgetown 161394c2d487SPhilip Paeps -4:00 - -04 1915 Mar 1 161494c2d487SPhilip Paeps -3:45 - -0345 1975 Aug 1 161594c2d487SPhilip Paeps -3:00 - -03 1992 Mar 29 1:00 1616dc135c6eSBaptiste Daroussin -4:00 - -04 16171315084cSEdwin Groothuis 16181315084cSEdwin Groothuis# Paraguay 1619c26a5802SEdwin Groothuis# 16201315084cSEdwin Groothuis# From Paul Eggert (2006-03-22): 1621eb1c1a05SSergey Kandaurov# Shanks & Pottenger say that spring transitions are 01:00 -> 02:00, 1622eb1c1a05SSergey Kandaurov# and autumn transitions are 00:00 -> 23:00. Go with pre-1999 16231315084cSEdwin Groothuis# editions of Shanks, and with the IATA, who say transitions occur at 00:00. 1624c26a5802SEdwin Groothuis# 1625c26a5802SEdwin Groothuis# From Waldemar Villamayor-Venialbo (2013-09-20): 1626c26a5802SEdwin Groothuis# No time of the day is established for the adjustment, so people normally 1627c26a5802SEdwin Groothuis# adjust their clocks at 0 hour of the given dates. 1628c26a5802SEdwin Groothuis# 162912a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 163046bee4edSPhilip PaepsRule Para 1975 1988 - Oct 1 0:00 1:00 - 16311315084cSEdwin GroothuisRule Para 1975 1978 - Mar 1 0:00 0 - 16321315084cSEdwin GroothuisRule Para 1979 1991 - Apr 1 0:00 0 - 163346bee4edSPhilip PaepsRule Para 1989 only - Oct 22 0:00 1:00 - 163446bee4edSPhilip PaepsRule Para 1990 only - Oct 1 0:00 1:00 - 163546bee4edSPhilip PaepsRule Para 1991 only - Oct 6 0:00 1:00 - 16361315084cSEdwin GroothuisRule Para 1992 only - Mar 1 0:00 0 - 163746bee4edSPhilip PaepsRule Para 1992 only - Oct 5 0:00 1:00 - 16381315084cSEdwin GroothuisRule Para 1993 only - Mar 31 0:00 0 - 163946bee4edSPhilip PaepsRule Para 1993 1995 - Oct 1 0:00 1:00 - 16401315084cSEdwin GroothuisRule Para 1994 1995 - Feb lastSun 0:00 0 - 16411315084cSEdwin GroothuisRule Para 1996 only - Mar 1 0:00 0 - 16421315084cSEdwin Groothuis# IATA SSIM (2000-02) says 1999-10-10; ignore this for now. 16431315084cSEdwin Groothuis# From Steffen Thorsen (2000-10-02): 16441315084cSEdwin Groothuis# I have three independent reports that Paraguay changed to DST this Sunday 16451315084cSEdwin Groothuis# (10-01). 16461315084cSEdwin Groothuis# 16471315084cSEdwin Groothuis# Translated by Gwillim Law (2001-02-27) from 16487ce0f064SEdwin Groothuis# Noticias, a daily paper in Asunción, Paraguay (2000-10-01): 16497ce0f064SEdwin Groothuis# http://www.diarionoticias.com.py/011000/nacional/naciona1.htm 16501315084cSEdwin Groothuis# Starting at 0:00 today, the clock will be set forward 60 minutes, in 16511315084cSEdwin Groothuis# fulfillment of Decree No. 7,273 of the Executive Power.... The time change 16521315084cSEdwin Groothuis# system has been operating for several years. Formerly there was a separate 16531315084cSEdwin Groothuis# decree each year; the new law has the same effect, but permanently. Every 16541315084cSEdwin Groothuis# year, the time will change on the first Sunday of October; likewise, the 16551315084cSEdwin Groothuis# clock will be set back on the first Sunday of March. 16561315084cSEdwin Groothuis# 165746bee4edSPhilip PaepsRule Para 1996 2001 - Oct Sun>=1 0:00 1:00 - 16581315084cSEdwin Groothuis# IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger. 16591315084cSEdwin GroothuisRule Para 1997 only - Feb lastSun 0:00 0 - 16601315084cSEdwin Groothuis# Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but 16611315084cSEdwin Groothuis# (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27). 16621315084cSEdwin GroothuisRule Para 1998 2001 - Mar Sun>=1 0:00 0 - 16631315084cSEdwin Groothuis# From Rives McDow (2002-02-28): 16646790a258SEdwin Groothuis# A decree was issued in Paraguay (No. 16350) on 2002-02-26 that changed the 16651315084cSEdwin Groothuis# dst method to be from the first Sunday in September to the first Sunday in 16661315084cSEdwin Groothuis# April. 16671315084cSEdwin GroothuisRule Para 2002 2004 - Apr Sun>=1 0:00 0 - 166846bee4edSPhilip PaepsRule Para 2002 2003 - Sep Sun>=1 0:00 1:00 - 16691315084cSEdwin Groothuis# 1670eb1c1a05SSergey Kandaurov# From Jesper Nørgaard Welen (2005-01-02): 16711315084cSEdwin Groothuis# There are several sources that claim that Paraguay made 16721315084cSEdwin Groothuis# a timezone rule change in autumn 2004. 16731315084cSEdwin Groothuis# From Steffen Thorsen (2005-01-05): 16741315084cSEdwin Groothuis# Decree 1,867 (2004-03-05) 1675eb1c1a05SSergey Kandaurov# From Carlos Raúl Perasso via Jesper Nørgaard Welen (2006-10-13) 16767ce0f064SEdwin Groothuis# http://www.presidencia.gov.py/decretos/D1867.pdf 167746bee4edSPhilip PaepsRule Para 2004 2009 - Oct Sun>=15 0:00 1:00 - 16784426713aSEdwin GroothuisRule Para 2005 2009 - Mar Sun>=8 0:00 0 - 1679eb1c1a05SSergey Kandaurov# From Carlos Raúl Perasso (2010-02-18): 1680eb1c1a05SSergey Kandaurov# By decree number 3958 issued yesterday 16814426713aSEdwin Groothuis# http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf 16824426713aSEdwin Groothuis# Paraguay changes its DST schedule, postponing the March rule to April and 16834426713aSEdwin Groothuis# modifying the October date. The decree reads: 16844426713aSEdwin Groothuis# ... 16854426713aSEdwin Groothuis# Art. 1. It is hereby established that from the second Sunday of the month of 16864426713aSEdwin Groothuis# April of this year (2010), the official time is to be set back 60 minutes, 16874426713aSEdwin Groothuis# and that on the first Sunday of the month of October, it is to be set 16884426713aSEdwin Groothuis# forward 60 minutes, in all the territory of the Paraguayan Republic. 16894426713aSEdwin Groothuis# ... 169046bee4edSPhilip PaepsRule Para 2010 max - Oct Sun>=1 0:00 1:00 - 1691b1fd06c7SEdwin GroothuisRule Para 2010 2012 - Apr Sun>=8 0:00 0 - 1692eb185a68SEdwin Groothuis# 1693eb185a68SEdwin Groothuis# From Steffen Thorsen (2013-03-07): 1694eb185a68SEdwin Groothuis# Paraguay will end DST on 2013-03-24 00:00.... 1695eb185a68SEdwin Groothuis# http://www.ande.gov.py/interna.php?id=1075 1696eb185a68SEdwin Groothuis# 1697eb1c1a05SSergey Kandaurov# From Carlos Raúl Perasso (2013-03-15): 1698b1fd06c7SEdwin Groothuis# The change in Paraguay is now final. Decree number 10780 1699b1fd06c7SEdwin Groothuis# http://www.presidencia.gov.py/uploads/pdf/presidencia-3b86ff4b691c79d4f5927ca964922ec74772ce857c02ca054a52a37b49afc7fb.pdf 1700eb1c1a05SSergey Kandaurov# From Carlos Raúl Perasso (2014-02-28): 1701890859c7SEdwin Groothuis# Decree 1264 can be found at: 1702890859c7SEdwin Groothuis# http://www.presidencia.gov.py/archivos/documentos/DECRETO1264_ey9r8zai.pdf 1703eebb9c2cSPhilip Paeps# 1704eebb9c2cSPhilip Paeps# From Paul Eggert (2023-07-26): 1705eebb9c2cSPhilip Paeps# Transition dates are now set by Law No. 7115, not by presidential decree. 1706eebb9c2cSPhilip Paeps# https://www.abc.com.py/politica/2023/07/12/promulgacion-el-cambio-de-hora-sera-por-ley/ 1707eebb9c2cSPhilip Paeps# From Carlos Raúl Perasso (2023-07-27): 1708eebb9c2cSPhilip Paeps# http://silpy.congreso.gov.py/descarga/ley-144138 1709b1fd06c7SEdwin GroothuisRule Para 2013 max - Mar Sun>=22 0:00 0 - 17101315084cSEdwin Groothuis 17112865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 17121315084cSEdwin GroothuisZone America/Asuncion -3:50:40 - LMT 1890 1713eb1c1a05SSergey Kandaurov -3:50:40 - AMT 1931 Oct 10 # Asunción Mean Time 1714dc135c6eSBaptiste Daroussin -4:00 - -04 1972 Oct 1715dc135c6eSBaptiste Daroussin -3:00 - -03 1974 Apr 1716dc135c6eSBaptiste Daroussin -4:00 Para -04/-03 17171315084cSEdwin Groothuis 17181315084cSEdwin Groothuis# Peru 17191315084cSEdwin Groothuis# 1720eb1c1a05SSergey Kandaurov# From Evelyn C. Leeper via Mark Brader (2003-10-26) 1721eb1c1a05SSergey Kandaurov# <news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net>: 17221315084cSEdwin Groothuis# When we were in Peru in 1985-1986, they apparently switched over 17231315084cSEdwin Groothuis# sometime between December 29 and January 3 while we were on the Amazon. 17241315084cSEdwin Groothuis# 17251315084cSEdwin Groothuis# From Paul Eggert (2006-03-22): 17261315084cSEdwin Groothuis# Shanks & Pottenger don't have this transition. Assume 1986 was like 1987. 17271315084cSEdwin Groothuis 172812a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 172946bee4edSPhilip PaepsRule Peru 1938 only - Jan 1 0:00 1:00 - 17301315084cSEdwin GroothuisRule Peru 1938 only - Apr 1 0:00 0 - 173146bee4edSPhilip PaepsRule Peru 1938 1939 - Sep lastSun 0:00 1:00 - 17321315084cSEdwin GroothuisRule Peru 1939 1940 - Mar Sun>=24 0:00 0 - 173346bee4edSPhilip PaepsRule Peru 1986 1987 - Jan 1 0:00 1:00 - 17341315084cSEdwin GroothuisRule Peru 1986 1987 - Apr 1 0:00 0 - 173546bee4edSPhilip PaepsRule Peru 1990 only - Jan 1 0:00 1:00 - 17361315084cSEdwin GroothuisRule Peru 1990 only - Apr 1 0:00 0 - 17371315084cSEdwin Groothuis# IATA is ambiguous for 1993/1995; go with Shanks & Pottenger. 173846bee4edSPhilip PaepsRule Peru 1994 only - Jan 1 0:00 1:00 - 17391315084cSEdwin GroothuisRule Peru 1994 only - Apr 1 0:00 0 - 17402865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 17411315084cSEdwin GroothuisZone America/Lima -5:08:12 - LMT 1890 17421315084cSEdwin Groothuis -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time? 1743dc135c6eSBaptiste Daroussin -5:00 Peru -05/-04 17441315084cSEdwin Groothuis 17451315084cSEdwin Groothuis# South Georgia 17462865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 17471315084cSEdwin GroothuisZone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken 1748dc135c6eSBaptiste Daroussin -2:00 - -02 17491315084cSEdwin Groothuis 17501315084cSEdwin Groothuis# South Sandwich Is 17511315084cSEdwin Groothuis# uninhabited; scientific personnel have wintered 17521315084cSEdwin Groothuis 17531315084cSEdwin Groothuis# Suriname 17542865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 17551315084cSEdwin GroothuisZone America/Paramaribo -3:40:40 - LMT 1911 17561315084cSEdwin Groothuis -3:40:52 - PMT 1935 # Paramaribo Mean Time 17571315084cSEdwin Groothuis -3:40:36 - PMT 1945 Oct # The capital moved? 1758dc135c6eSBaptiste Daroussin -3:30 - -0330 1984 Oct 1759dc135c6eSBaptiste Daroussin -3:00 - -03 17601315084cSEdwin Groothuis 17611315084cSEdwin Groothuis# Uruguay 17621315084cSEdwin Groothuis# From Paul Eggert (1993-11-18): 17631315084cSEdwin Groothuis# Uruguay wins the prize for the strangest peacetime manipulation of the rules. 176446bee4edSPhilip Paeps# 176546bee4edSPhilip Paeps# From Tim Parenti (2018-02-20), per Jeremie Bonjour (2018-01-31) and Michael 176646bee4edSPhilip Paeps# Deckers (2018-02-20): 176746bee4edSPhilip Paeps# ... At least they kept good records... 176846bee4edSPhilip Paeps# 176946bee4edSPhilip Paeps# http://www.armada.mil.uy/ContenidosPDFs/sohma/web/almanaque/almanaque_2018.pdf#page=36 177046bee4edSPhilip Paeps# Page 36 of Almanaque 2018, published by the Oceanography, Hydrography, and 177146bee4edSPhilip Paeps# Meteorology Service of the Uruguayan Navy, seems to give many transitions 177246bee4edSPhilip Paeps# with greater clarity than we've had before. It directly references many laws 177346bee4edSPhilip Paeps# and decrees which are, in turn, referenced below. They can be viewed in the 177446bee4edSPhilip Paeps# public archives of the Diario Oficial (in Spanish) at 177546bee4edSPhilip Paeps# http://www.impo.com.uy/diariooficial/ 177646bee4edSPhilip Paeps# 177746bee4edSPhilip Paeps# Ley No. 3920 of 1908-06-10 placed the determination of legal time under the 177846bee4edSPhilip Paeps# auspices of the National Institute for the Prediction of Time. It is unclear 177946bee4edSPhilip Paeps# exactly what offset was used during this period, though Ley No. 7200 of 178046bee4edSPhilip Paeps# 1920-04-23 used the Observatory of the National Meteorological Institute in 178146bee4edSPhilip Paeps# Montevideo (34° 54' 33" S, 56° 12' 45" W) as its reference meridian, 178246bee4edSPhilip Paeps# retarding legal time by 15 minutes 9 seconds from 1920-04-30 24:00, 178346bee4edSPhilip Paeps# resulting in UT-04. Assume the corresponding LMT of UT-03:44:51 (given on 178446bee4edSPhilip Paeps# page 725 of the Proceedings of the Second Pan-American Scientific Congress, 178546bee4edSPhilip Paeps# 1915-1916) was in use, and merely became official from 1908-06-10. 178646bee4edSPhilip Paeps# https://www.impo.com.uy/diariooficial/1908/06/18/12 178746bee4edSPhilip Paeps# https://www.impo.com.uy/diariooficial/1920/04/27/9 178846bee4edSPhilip Paeps# 178946bee4edSPhilip Paeps# Ley No. 7594 of 1923-06-28 specified legal time as Observatory time advanced 179046bee4edSPhilip Paeps# by 44 minutes 51 seconds (UT-03) "from 30 September to 31 March", and by 14 179146bee4edSPhilip Paeps# minutes 51 seconds (UT-03:30) "the rest of the year"; a message from the 179246bee4edSPhilip Paeps# National Council of Administration the same day, published directly below the 179346bee4edSPhilip Paeps# law in the Diario Oficial, specified the first transition to be 1923-09-30 179446bee4edSPhilip Paeps# 24:00. This effectively established standard time at UT-03:30 with 30 179546bee4edSPhilip Paeps# minutes DST. Assume transitions at 24:00 on the specified days until Ley No. 179646bee4edSPhilip Paeps# 7919 of 1926-03-05 ended this arrangement, repealing all "laws and other 179746bee4edSPhilip Paeps# provisions which oppose" it, resulting in year-round UT-03:30; a Resolución 179846bee4edSPhilip Paeps# of 1926-03-11 puts the final transition at 1926-03-31 24:00, the same as it 179946bee4edSPhilip Paeps# would have been under the previous law. 180046bee4edSPhilip Paeps# https://www.impo.com.uy/diariooficial/1923/07/02/2 180146bee4edSPhilip Paeps# https://www.impo.com.uy/diariooficial/1926/03/10/2 180246bee4edSPhilip Paeps# https://www.impo.com.uy/diariooficial/1926/03/18/2 180346bee4edSPhilip Paeps# 180412a899b6SPhilip Paeps# Rule NAME FROM TO - IN ON AT SAVE LETTER/S 180546bee4edSPhilip PaepsRule Uruguay 1923 1925 - Oct 1 0:00 0:30 - 18061315084cSEdwin GroothuisRule Uruguay 1924 1926 - Apr 1 0:00 0 - 180746bee4edSPhilip Paeps# From Tim Parenti (2018-02-15): 180846bee4edSPhilip Paeps# http://www.impo.com.uy/diariooficial/1933/10/27/6 180946bee4edSPhilip Paeps# 181046bee4edSPhilip Paeps# It appears Ley No. 9122 of 1933 was never published as such in the Diario 181146bee4edSPhilip Paeps# Oficial, but instead appeared as Document 26 in the Diario on Friday 181246bee4edSPhilip Paeps# 1933-10-27 as a decree made Monday 1933-10-23 and filed under the Ministry of 181346bee4edSPhilip Paeps# National Defense. It reinstituted a DST of 30 minutes (to UT-03) "from the 181446bee4edSPhilip Paeps# last Sunday of October...until the last Saturday of March." In accordance 181546bee4edSPhilip Paeps# with this provision, the first transition was explicitly specified in Article 181646bee4edSPhilip Paeps# 2 of the decree as Saturday 1933-10-28 at 24:00; that is, Sunday 1933-10-29 181746bee4edSPhilip Paeps# at 00:00. Assume transitions at 00:00 Sunday throughout. 181846bee4edSPhilip Paeps# 181946bee4edSPhilip Paeps# Departing from the matter-of-fact nature of previous timekeeping laws, the 182046bee4edSPhilip Paeps# 1933 decree "consider[s] the advantages of...the advance of legal time": 182146bee4edSPhilip Paeps# 182246bee4edSPhilip Paeps# "Whereas: The measure adopted by almost all nations at the time of the last 182346bee4edSPhilip Paeps# World War still persists in North America and Europe, precisely because of 182446bee4edSPhilip Paeps# the economic, hygienic, and social advantages derived from such an 182546bee4edSPhilip Paeps# emergency measure... 182646bee4edSPhilip Paeps# 182746bee4edSPhilip Paeps# Whereas: The advance of the legal time during the summer seasons, by 182846bee4edSPhilip Paeps# displacing social activity near sunrise, favors the citizen populations 182946bee4edSPhilip Paeps# and especially the society that creates and works..." 183046bee4edSPhilip Paeps# 183146bee4edSPhilip Paeps# It further specified that "necessary measures" be taken to ensure that 183246bee4edSPhilip Paeps# "public spectacles finish, in general, before [01:00]." 183346bee4edSPhilip PaepsRule Uruguay 1933 1938 - Oct lastSun 0:00 0:30 - 183446bee4edSPhilip PaepsRule Uruguay 1934 1941 - Mar lastSat 24:00 0 - 183546bee4edSPhilip Paeps# From Tim Parenti (2018-02-15): 183646bee4edSPhilip Paeps# Most of the Rules below, and their contemporaneous Zone lines, have been 183746bee4edSPhilip Paeps# updated simply to match the Almanaque 2018. Although the document does not 183846bee4edSPhilip Paeps# list exact transition times, midnight transitions were already present in our 183946bee4edSPhilip Paeps# data here for all transitions through 2004-09, and this is both consistent 184046bee4edSPhilip Paeps# with prior transitions and verified in several decrees marked below between 184146bee4edSPhilip Paeps# 1939-09 and 2004-09, wherein the relevant text was typically of the form: 184246bee4edSPhilip Paeps# 184346bee4edSPhilip Paeps# "From 0 hours on [date], the legal time of the entire Republic will be... 184446bee4edSPhilip Paeps# 184546bee4edSPhilip Paeps# In accordance with [the preceding], on [previous date] at 24 hours, all 184646bee4edSPhilip Paeps# clocks throughout the Republic will be [advanced/retarded] by..." 184746bee4edSPhilip Paeps# 184846bee4edSPhilip Paeps# It is possible that there is greater specificity to be found for the Rules 184946bee4edSPhilip Paeps# below, but it is buried in no fewer than 40 different decrees individually 185046bee4edSPhilip Paeps# referenced by the Almanaque for the period from 1939-09 to 2014-09. 185146bee4edSPhilip Paeps# Four-fifths of these were promulgated less than two weeks before taking 185246bee4edSPhilip Paeps# effect; more than half within a week and none more than 5 weeks. Only the 185346bee4edSPhilip Paeps# handful with comments below have been checked with any thoroughness. 185446bee4edSPhilip PaepsRule Uruguay 1939 only - Oct 1 0:00 0:30 - 185546bee4edSPhilip PaepsRule Uruguay 1940 only - Oct 27 0:00 0:30 - 185646bee4edSPhilip Paeps# From Tim Parenti (2018-02-15): 185746bee4edSPhilip Paeps# Decreto 1145 of the Ministry of National Defense, dated 1941-07-26, specified 185846bee4edSPhilip Paeps# UT-03 from Friday 1941-08-01 00:00, citing an "urgent...need to save fuel". 185946bee4edSPhilip Paeps# http://www.impo.com.uy/diariooficial/1941/08/04/1 186046bee4edSPhilip PaepsRule Uruguay 1941 only - Aug 1 0:00 0:30 - 186146bee4edSPhilip Paeps# From Tim Parenti (2018-02-15): 186246bee4edSPhilip Paeps# Decreto 1866 of the Ministry of National Defense, dated 1942-12-09, specified 186346bee4edSPhilip Paeps# further advancement (to UT-02:30) from Sunday 1942-12-13 24:00. Since clocks 186446bee4edSPhilip Paeps# never went back to UT-03:30 thereafter, this is modeled as advancing standard 186546bee4edSPhilip Paeps# time by 30 minutes to UT-03, while retaining 30 minutes of DST. 186646bee4edSPhilip Paeps# http://www.impo.com.uy/diariooficial/1942/12/16/3 186746bee4edSPhilip PaepsRule Uruguay 1942 only - Dec 14 0:00 0:30 - 18681315084cSEdwin GroothuisRule Uruguay 1943 only - Mar 14 0:00 0 - 186946bee4edSPhilip PaepsRule Uruguay 1959 only - May 24 0:00 0:30 - 18701315084cSEdwin GroothuisRule Uruguay 1959 only - Nov 15 0:00 0 - 187146bee4edSPhilip PaepsRule Uruguay 1960 only - Jan 17 0:00 1:00 - 18721315084cSEdwin GroothuisRule Uruguay 1960 only - Mar 6 0:00 0 - 187346bee4edSPhilip PaepsRule Uruguay 1965 only - Apr 4 0:00 1:00 - 18741315084cSEdwin GroothuisRule Uruguay 1965 only - Sep 26 0:00 0 - 187546bee4edSPhilip Paeps# From Tim Parenti (2018-02-15): 187646bee4edSPhilip Paeps# Decreto 321/968 of 1968-05-25, citing emergency drought measures decreed the 187746bee4edSPhilip Paeps# day before, brought clocks forward 30 minutes from Monday 1968-05-27 00:00. 187846bee4edSPhilip Paeps# http://www.impo.com.uy/diariooficial/1968/05/30/5 187946bee4edSPhilip PaepsRule Uruguay 1968 only - May 27 0:00 0:30 - 188046bee4edSPhilip PaepsRule Uruguay 1968 only - Dec 1 0:00 0 - 188146bee4edSPhilip Paeps# From Tim Parenti (2018-02-15): 188246bee4edSPhilip Paeps# Decreto 188/970 of 1970-04-23 instituted restrictions on electricity 188346bee4edSPhilip Paeps# consumption "as a consequence of the current rainfall regime in the country". 188446bee4edSPhilip Paeps# Articles 13 and 14 advanced clocks by an hour from Saturday 1970-04-25 00:00. 188546bee4edSPhilip Paeps# http://www.impo.com.uy/diariooficial/1970/04/29/4 188646bee4edSPhilip PaepsRule Uruguay 1970 only - Apr 25 0:00 1:00 - 188746bee4edSPhilip PaepsRule Uruguay 1970 only - Jun 14 0:00 0 - 188846bee4edSPhilip PaepsRule Uruguay 1972 only - Apr 23 0:00 1:00 - 188946bee4edSPhilip PaepsRule Uruguay 1972 only - Jul 16 0:00 0 - 189046bee4edSPhilip Paeps# From Tim Parenti (2018-02-15): 189146bee4edSPhilip Paeps# Decreto 29/974 of 1974-01-11, citing "the international rise in the price of 189246bee4edSPhilip Paeps# oil", advanced clocks by 90 minutes (to UT-01:30). Decreto 163/974 of 189346bee4edSPhilip Paeps# 1974-03-04 returned 60 of those minutes (to UT-02:30), and the remaining 30 189446bee4edSPhilip Paeps# minutes followed in Decreto 679/974 of 1974-08-29. 189546bee4edSPhilip Paeps# http://www.impo.com.uy/diariooficial/1974/01/22/11 189646bee4edSPhilip Paeps# http://www.impo.com.uy/diariooficial/1974/03/14/3 189746bee4edSPhilip Paeps# http://www.impo.com.uy/diariooficial/1974/09/04/6 189846bee4edSPhilip PaepsRule Uruguay 1974 only - Jan 13 0:00 1:30 - 189946bee4edSPhilip PaepsRule Uruguay 1974 only - Mar 10 0:00 0:30 - 190046bee4edSPhilip PaepsRule Uruguay 1974 only - Sep 1 0:00 0 - 190146bee4edSPhilip PaepsRule Uruguay 1974 only - Dec 22 0:00 1:00 - 190246bee4edSPhilip PaepsRule Uruguay 1975 only - Mar 30 0:00 0 - 190346bee4edSPhilip PaepsRule Uruguay 1976 only - Dec 19 0:00 1:00 - 190446bee4edSPhilip PaepsRule Uruguay 1977 only - Mar 6 0:00 0 - 190546bee4edSPhilip PaepsRule Uruguay 1977 only - Dec 4 0:00 1:00 - 190646bee4edSPhilip PaepsRule Uruguay 1978 1979 - Mar Sun>=1 0:00 0 - 190746bee4edSPhilip PaepsRule Uruguay 1978 only - Dec 17 0:00 1:00 - 190846bee4edSPhilip PaepsRule Uruguay 1979 only - Apr 29 0:00 1:00 - 190946bee4edSPhilip PaepsRule Uruguay 1980 only - Mar 16 0:00 0 - 191046bee4edSPhilip Paeps# From Tim Parenti (2018-02-15): 191146bee4edSPhilip Paeps# Decreto 725/987 of 1987-12-04 cited "better use of national tourist 191246bee4edSPhilip Paeps# attractions" to advance clocks one hour from Monday 1987-12-14 00:00. 191346bee4edSPhilip Paeps# http://www.impo.com.uy/diariooficial/1988/01/25/1 191446bee4edSPhilip PaepsRule Uruguay 1987 only - Dec 14 0:00 1:00 - 191546bee4edSPhilip PaepsRule Uruguay 1988 only - Feb 28 0:00 0 - 191646bee4edSPhilip PaepsRule Uruguay 1988 only - Dec 11 0:00 1:00 - 191746bee4edSPhilip PaepsRule Uruguay 1989 only - Mar 5 0:00 0 - 191846bee4edSPhilip PaepsRule Uruguay 1989 only - Oct 29 0:00 1:00 - 191946bee4edSPhilip PaepsRule Uruguay 1990 only - Feb 25 0:00 0 - 192046bee4edSPhilip Paeps# From Tim Parenti (2018-02-15), per Paul Eggert (1999-11-04): 192146bee4edSPhilip Paeps# IATA agrees as below for 1990-10 through 1993-02. Per Almanaque 2018, the 192246bee4edSPhilip Paeps# 1992/1993 season appears to be the first in over half a century where DST 192346bee4edSPhilip Paeps# both began and ended pursuant to the same decree. 192446bee4edSPhilip PaepsRule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 - 192546bee4edSPhilip PaepsRule Uruguay 1991 1992 - Mar Sun>=1 0:00 0 - 192646bee4edSPhilip PaepsRule Uruguay 1992 only - Oct 18 0:00 1:00 - 19271315084cSEdwin GroothuisRule Uruguay 1993 only - Feb 28 0:00 0 - 19281315084cSEdwin Groothuis# From Eduardo Cota (2004-09-20): 19297ce0f064SEdwin Groothuis# The Uruguayan government has decreed a change in the local time.... 193046bee4edSPhilip Paeps# From Tim Parenti (2018-02-15): 193146bee4edSPhilip Paeps# Decreto 328/004 of 2004-09-15. 193246bee4edSPhilip Paeps# http://www.impo.com.uy/diariooficial/2004/09/23/documentos.pdf#page=1 193346bee4edSPhilip PaepsRule Uruguay 2004 only - Sep 19 0:00 1:00 - 19341315084cSEdwin Groothuis# From Steffen Thorsen (2005-03-11): 19351315084cSEdwin Groothuis# Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to 19361315084cSEdwin Groothuis# save energy ... it was postponed two weeks.... 193746bee4edSPhilip Paeps# From Tim Parenti (2018-02-15): 193846bee4edSPhilip Paeps# This 2005 postponement is not in Almanaque 2018. Go with the contemporaneous 193946bee4edSPhilip Paeps# reporting, which is confirmed by Decreto 107/005 of 2005-03-10 amending 194046bee4edSPhilip Paeps# Decreto 328/004: 194146bee4edSPhilip Paeps# http://www.impo.com.uy/diariooficial/2005/03/15/documentos.pdf#page=1 194246bee4edSPhilip Paeps# The original decree specified a transition of 2005-03-12 24:00, but the new 194346bee4edSPhilip Paeps# one specified 2005-03-27 02:00. 19441315084cSEdwin GroothuisRule Uruguay 2005 only - Mar 27 2:00 0 - 19451315084cSEdwin Groothuis# From Eduardo Cota (2005-09-27): 194646bee4edSPhilip Paeps# ...from 2005-10-09 at 02:00 local time, until 2006-03-12 at 02:00 local time, 194746bee4edSPhilip Paeps# official time in Uruguay will be at GMT -2. 194846bee4edSPhilip Paeps# From Tim Parenti (2018-02-15): 194946bee4edSPhilip Paeps# Decreto 318/005 of 2005-09-19. 195046bee4edSPhilip Paeps# http://www.impo.com.uy/diariooficial/2005/09/23/documentos.pdf#page=1 195146bee4edSPhilip PaepsRule Uruguay 2005 only - Oct 9 2:00 1:00 - 195246bee4edSPhilip PaepsRule Uruguay 2006 2015 - Mar Sun>=8 2:00 0 - 195346bee4edSPhilip Paeps# From Tim Parenti (2018-02-15), per Jesper Nørgaard Welen (2006-09-06): 195446bee4edSPhilip Paeps# Decreto 311/006 of 2006-09-04 established regular DST from the first Sunday 195546bee4edSPhilip Paeps# of October at 02:00 through the second Sunday of March at 02:00. Almanaque 195646bee4edSPhilip Paeps# 2018 appears to have a few typoed dates through this period; ignore them. 195746bee4edSPhilip Paeps# http://www.impo.com.uy/diariooficial/2006/09/08/documentos.pdf#page=1 195846bee4edSPhilip PaepsRule Uruguay 2006 2014 - Oct Sun>=1 2:00 1:00 - 19596790a258SEdwin Groothuis# From Steffen Thorsen (2015-06-30): 19606790a258SEdwin Groothuis# ... it looks like they will not be using DST the coming summer: 19616790a258SEdwin Groothuis# http://www.elobservador.com.uy/gobierno-resolvio-que-no-habra-cambio-horario-verano-n656787 19626790a258SEdwin Groothuis# http://www.republica.com.uy/este-ano-no-se-modificara-el-huso-horario-en-uruguay/523760/ 19636790a258SEdwin Groothuis# From Paul Eggert (2015-06-30): 19646790a258SEdwin Groothuis# Apparently restaurateurs complained that DST caused people to go to the beach 19656790a258SEdwin Groothuis# instead of out to dinner. 19666790a258SEdwin Groothuis# From Pablo Camargo (2015-07-13): 19676790a258SEdwin Groothuis# http://archivo.presidencia.gub.uy/sci/decretos/2015/06/cons_min_201.pdf 196846bee4edSPhilip Paeps# From Tim Parenti (2018-02-15): 196946bee4edSPhilip Paeps# Decreto 178/015 of 2015-06-29; repeals Decreto 311/006. 1970dc135c6eSBaptiste Daroussin 1971dc135c6eSBaptiste Daroussin# This Zone can be simplified once we assume zic %z. 197246bee4edSPhilip PaepsZone America/Montevideo -3:44:51 - LMT 1908 Jun 10 197346bee4edSPhilip Paeps -3:44:51 - MMT 1920 May 1 # Montevideo MT 197446bee4edSPhilip Paeps -4:00 - -04 1923 Oct 1 1975dc135c6eSBaptiste Daroussin -3:30 Uruguay -0330/-03 1942 Dec 14 197646bee4edSPhilip Paeps -3:00 Uruguay -03/-0230 1960 1977dc135c6eSBaptiste Daroussin -3:00 Uruguay -03/-02 1968 197846bee4edSPhilip Paeps -3:00 Uruguay -03/-0230 1970 1979dc135c6eSBaptiste Daroussin -3:00 Uruguay -03/-02 1974 198046bee4edSPhilip Paeps -3:00 Uruguay -03/-0130 1974 Mar 10 1981dc135c6eSBaptiste Daroussin -3:00 Uruguay -03/-0230 1974 Dec 22 1982dc135c6eSBaptiste Daroussin -3:00 Uruguay -03/-02 19831315084cSEdwin Groothuis 19841315084cSEdwin Groothuis# Venezuela 19851315084cSEdwin Groothuis# 19866790a258SEdwin Groothuis# From Paul Eggert (2015-07-28): 19876790a258SEdwin Groothuis# For the 1965 transition see Gaceta Oficial No. 27.619 (1964-12-15), p 205.533 19886790a258SEdwin Groothuis# http://www.pgr.gob.ve/dmdocuments/1964/27619.pdf 19896790a258SEdwin Groothuis# 19901315084cSEdwin Groothuis# From John Stainforth (2007-11-28): 19911315084cSEdwin Groothuis# ... the change for Venezuela originally expected for 2007-12-31 has 19921315084cSEdwin Groothuis# been brought forward to 2007-12-09. The official announcement was 1993eb1c1a05SSergey Kandaurov# published today in the "Gaceta Oficial de la República Bolivariana 1994eb1c1a05SSergey Kandaurov# de Venezuela, número 38.819" (official document for all laws or 19951315084cSEdwin Groothuis# resolution publication) 19961315084cSEdwin Groothuis# http://www.globovision.com/news.php?nid=72208 19971315084cSEdwin Groothuis 19988fdf5721SBaptiste Daroussin# From Alexander Krivenyshev (2016-04-15): 19998fdf5721SBaptiste Daroussin# https://actualidad.rt.com/actualidad/204758-venezuela-modificar-huso-horario-sequia-elnino 20008fdf5721SBaptiste Daroussin# 20018fdf5721SBaptiste Daroussin# From Paul Eggert (2016-04-15): 20028fdf5721SBaptiste Daroussin# Clocks advance 30 minutes on 2016-05-01 at 02:30.... 20038fdf5721SBaptiste Daroussin# "'Venezuela's new time-zone: hours without light, hours without water, 20048fdf5721SBaptiste Daroussin# hours of presidential broadcasts, hours of lines,' quipped comedian 20058fdf5721SBaptiste Daroussin# Jean Mary Curró ...". See: Cawthorne A, Kai D. Venezuela scraps 20068fdf5721SBaptiste Daroussin# half-hour time difference set by Chavez. Reuters 2016-04-15 14:50 -0400 20078d7edd17SPhilip Paeps# https://www.reuters.com/article/us-venezuela-timezone-idUSKCN0XC2BE 20088fdf5721SBaptiste Daroussin# 20098fdf5721SBaptiste Daroussin# From Matt Johnson (2016-04-20): 20108fdf5721SBaptiste Daroussin# ... published in the official Gazette [2016-04-18], here: 20118fdf5721SBaptiste Daroussin# http://historico.tsj.gob.ve/gaceta_ext/abril/1842016/E-1842016-4551.pdf 20128fdf5721SBaptiste Daroussin 20132865ab3fSPhilip Paeps# Zone NAME STDOFF RULES FORMAT [UNTIL] 20141315084cSEdwin GroothuisZone America/Caracas -4:27:44 - LMT 1890 20151315084cSEdwin Groothuis -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time? 2016dc135c6eSBaptiste Daroussin -4:30 - -0430 1965 Jan 1 0:00 2017dc135c6eSBaptiste Daroussin -4:00 - -04 2007 Dec 9 3:00 2018dc135c6eSBaptiste Daroussin -4:30 - -0430 2016 May 1 2:30 2019dc135c6eSBaptiste Daroussin -4:00 - -04 2020