1# This file is in the public domain, so clarified as of
2# 2009-05-17 by Arthur David Olson.
3
4# This file is by no means authoritative; if you think you know better,
5# go ahead and edit the file (and please send any changes to
6# tz@iana.org for general use in the future). For more, please see
7# the file CONTRIBUTING in the tz distribution.
8
9# From Paul Eggert (2014-10-31):
10#
11# Unless otherwise specified, the source for data through 1990 is:
12# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
13# San Diego: ACS Publications, Inc. (2003).
14# Unfortunately this book contains many errors and cites no sources.
15#
16# Gwillim Law writes that a good source
17# for recent time zone data is the International Air Transport
18# Association's Standard Schedules Information Manual (IATA SSIM),
19# published semiannually. Law sent in several helpful summaries
20# of the IATA's data after 1990. Except where otherwise noted,
21# IATA SSIM is the source for entries after 1990.
22#
23# For data circa 1899, a common source is:
24# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94.
25# http://www.jstor.org/stable/1774359
26#
27# Earlier editions of these tables used the North American style (e.g. ARST and
28# ARDT for Argentine Standard and Daylight Time), but the following quote
29# suggests that it's better to use European style (e.g. ART and ARST).
30# I suggest the use of _Summer time_ instead of the more cumbersome
31# _daylight-saving time_. _Summer time_ seems to be in general use
32# in Europe and South America.
33# -- E O Cutler, _New York Times_ (1937-02-14), quoted in
34# H L Mencken, _The American Language: Supplement I_ (1960), p 466
35#
36# Earlier editions of these tables also used the North American style
37# for time zones in Brazil, but this was incorrect, as Brazilians say
38# "summer time". Reinaldo Goulart, a S��o Paulo businessman active in
39# the railroad sector, writes (1999-07-06):
40# The subject of time zones is currently a matter of discussion/debate in
41# Brazil. Let's say that "the Bras��lia time" is considered the
42# "official time" because Bras��lia is the capital city.
43# The other three time zones are called "Bras��lia time "minus one" or
44# "plus one" or "plus two". As far as I know there is no such
45# name/designation as "Eastern Time" or "Central Time".
46# So I invented the following (English-language) abbreviations for now.
47# Corrections are welcome!
48# std dst
49# -2:00 FNT FNST Fernando de Noronha
50# -3:00 BRT BRST Bras��lia
51# -4:00 AMT AMST Amazon
52# -5:00 ACT ACST Acre
53
54###############################################################################
55
56###############################################################################
57
58# Argentina
59
60# From Bob Devine (1988-01-28):
61# Argentina: first Sunday in October to first Sunday in April since 1976.
62# Double Summer time from 1969 to 1974. Switches at midnight.
63
64# From U. S. Naval Observatory (1988-01-19):
65# ARGENTINA 3 H BEHIND UTC
66
67# From Hernan G. Otero (1995-06-26):
68# I am sending modifications to the Argentine time zone table...
69# AR was chosen because they are the ISO letters that represent Argentina.
70
71# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
72Rule Arg 1930 only - Dec 1 0:00 1:00 S
73Rule Arg 1931 only - Apr 1 0:00 0 -
74Rule Arg 1931 only - Oct 15 0:00 1:00 S
75Rule Arg 1932 1940 - Mar 1 0:00 0 -
76Rule Arg 1932 1939 - Nov 1 0:00 1:00 S
77Rule Arg 1940 only - Jul 1 0:00 1:00 S
78Rule Arg 1941 only - Jun 15 0:00 0 -
79Rule Arg 1941 only - Oct 15 0:00 1:00 S
80Rule Arg 1943 only - Aug 1 0:00 0 -
81Rule Arg 1943 only - Oct 15 0:00 1:00 S
82Rule Arg 1946 only - Mar 1 0:00 0 -
83Rule Arg 1946 only - Oct 1 0:00 1:00 S
84Rule Arg 1963 only - Oct 1 0:00 0 -
85Rule Arg 1963 only - Dec 15 0:00 1:00 S
86Rule Arg 1964 1966 - Mar 1 0:00 0 -
87Rule Arg 1964 1966 - Oct 15 0:00 1:00 S
88Rule Arg 1967 only - Apr 2 0:00 0 -
89Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S
90Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 -
91Rule Arg 1974 only - Jan 23 0:00 1:00 S
92Rule Arg 1974 only - May 1 0:00 0 -
93Rule Arg 1988 only - Dec 1 0:00 1:00 S
94#
95# From Hernan G. Otero (1995-06-26):
96# These corrections were contributed by InterSoft Argentina S.A.,
97# obtaining the data from the:
98# Talleres de Hidrograf��a Naval Argentina
99# (Argentine Naval Hydrography Institute)
100Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 -
101Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S
102#
103# From Hernan G. Otero (1995-06-26):
104# From this moment on, the law that mandated the daylight saving
105# time corrections was derogated and no more modifications
106# to the time zones (for daylight saving) are now made.
107#
108# From Rives McDow (2000-01-10):
109# On October 3, 1999, 0:00 local, Argentina implemented daylight savings time,
110# which did not result in the switch of a time zone, as they stayed 9 hours
111# from the International Date Line.
112Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S
113# From Paul Eggert (2007-12-28):
114# DST was set to expire on March 5, not March 3, but since it was converted
115# to standard time on March 3 it's more convenient for us to pretend that
116# it ended on March 3.
117Rule Arg 2000 only - Mar 3 0:00 0 -
118#
119# From Peter Gradelski via Steffen Thorsen (2000-03-01):
120# We just checked with our S��o Paulo office and they say the government of
121# Argentina decided not to become one of the countries that go on or off DST.
122# So Buenos Aires should be -3 hours from GMT at all times.
123#
124# From Fabi��n L. Arce Jofr�� (2000-04-04):
125# The law that claimed DST for Argentina was derogated by President Fernando
126# de la R��a on March 2, 2000, because it would make people spend more energy
127# in the winter time, rather than less. The change took effect on March 3.
128#
129# From Mariano Absatz (2001-06-06):
130# one of the major newspapers here in Argentina said that the 1999
131# Timezone Law (which never was effectively applied) will (would?) be
132# in effect.... The article is at
133# http://ar.clarin.com/diario/2001-06-06/e-01701.htm
134# ... The Law itself is "Ley No. 25155", sanctioned on 1999-08-25, enacted
135# 1999-09-17, and published 1999-09-21. The official publication is at:
136# http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF
137# Regretfully, you have to subscribe (and pay) for the on-line version....
138#
139# (2001-06-12):
140# the timezone for Argentina will not change next Sunday.
141# Apparently it will do so on Sunday 24th....
142# http://ar.clarin.com/diario/2001-06-12/s-03501.htm
143#
144# (2001-06-25):
145# Last Friday (yes, the last working day before the date of the change), the
146# Senate annulled the 1999 law that introduced the changes later postponed.
147# http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm
148# It remains the vote of the Deputies..., but it will be the same....
149# This kind of things had always been done this way in Argentina.
150# We are still -03:00 all year round in all of the country.
151#
152# From Steffen Thorsen (2007-12-21):
153# A user (Leonardo Chaim) reported that Argentina will adopt DST....
154# all of the country (all Zone-entries) are affected. News reports like
155# http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate
156# that Argentina will use DST next year as well, from October to
157# March, although exact rules are not given.
158#
159# From Jesper N��rgaard Welen (2007-12-26)
160# The last hurdle of Argentina DST is over, the proposal was approved in
161# the lower chamber too (Diputados) with a vote 192 for and 2 against.
162# By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to
163# the original scanned proposal, where the dates and the zero hours are
164# clear and unambiguous...This is the article about final approval:
165# http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996
166#
167# From Paul Eggert (2007-12-22):
168# For dates after mid-2008, the following rules are my guesses and
169# are quite possibly wrong, but are more likely than no DST at all.
170
171# From Alexander Krivenyshev (2008-09-05):
172# As per message from Carlos Alberto Fonseca Arauz (Nicaragua),
173# Argentina will start DST on Sunday October 19, 2008.
174#
175# http://www.worldtimezone.com/dst_news/dst_news_argentina03.html
176# http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish)
177
178# From Juan Manuel Docile in https://bugs.gentoo.org/240339 (2008-10-07)
179# via Rodrigo Severo:
180# Argentinian law No. 25.155 is no longer valid.
181# http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm
182# The new one is law No. 26.350
183# http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm
184# So there is no summer time in Argentina for now.
185
186# From Mariano Absatz (2008-10-20):
187# Decree 1693/2008 applies Law 26.350 for the summer 2008/2009 establishing DST
188# in Argentina from 2008-10-19 until 2009-03-15.
189# http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01
190#
191
192# Decree 1705/2008 excepting 12 Provinces from applying DST in the summer
193# 2008/2009: Catamarca, La Rioja, Mendoza, Salta, San Juan, San Luis, La
194# Pampa, Neuqu��n, Rio Negro, Chubut, Santa Cruz and Tierra del Fuego
195# http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01
196#
197# Press release 235 dated Saturday October 18th, from the Government of the
198# Province of Jujuy saying it will not apply DST either (even when it was not
199# included in Decree 1705/2008).
200# http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc
201
202# From fullinet (2009-10-18):
203# As announced in
204# http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356
205# (an official .gob.ar) under title: "Sin Cambio de Hora"
206# (English: "No hour change").
207#
208# "Por el momento, el Gobierno Nacional resolvi�� no modificar la hora
209# oficial, decisi��n que estaba en estudio para su implementaci��n el
210# domingo 18 de octubre. Desde el Ministerio de Planificaci��n se anunci��
211# que la Argentina hoy, en estas condiciones meteorol��gicas, no necesita
212# la modificaci��n del huso horario, ya que 2009 nos encuentra con
213# crecimiento en la producci��n y distribuci��n energ��tica."
214
215Rule Arg 2007 only - Dec 30 0:00 1:00 S
216Rule Arg 2008 2009 - Mar Sun>=15 0:00 0 -
217Rule Arg 2008 only - Oct Sun>=15 0:00 1:00 S
218
219# From Mariano Absatz (2004-05-21):
220# Today it was officially published that the Province of Mendoza is changing
221# its timezone this winter... starting tomorrow night....
222# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf
223# From Paul Eggert (2004-05-24):
224# It's Law No. 7,210. This change is due to a public power emergency, so for
225# now we'll assume it's for this year only.
226#
227# From Paul Eggert (2014-08-09):
228# Hora de verano para la Rep��blica Argentina
229# http://buenasiembra.com.ar/esoterismo/astrologia/hora-de-verano-de-la-republica-argentina-27.html
230# says that standard time in Argentina from 1894-10-31
231# to 1920-05-01 was -4:16:48.25. Go with this more-precise value
232# over Shanks & Pottenger.
233#
234# From Mariano Absatz (2004-06-05):
235# These media articles from a major newspaper mostly cover the current state:
236# http://www.lanacion.com.ar/04/05/27/de_604825.asp
237# http://www.lanacion.com.ar/04/05/28/de_605203.asp
238#
239# The following eight (8) provinces pulled clocks back to UTC-04:00 at
240# midnight Monday May 31st. (that is, the night between 05/31 and 06/01).
241# Apparently, all nine provinces would go back to UTC-03:00 at the same
242# time in October 17th.
243#
244# Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz,
245# Tierra del Fuego, Tucum��n.
246#
247# From Mariano Absatz (2004-06-14):
248# ... this weekend, the Province of Tucum��n decided it'd go back to UTC-03:00
249# yesterday midnight (that is, at 24:00 Saturday 12th), since the people's
250# annoyance with the change is much higher than the power savings obtained....
251#
252# From Gwillim Law (2004-06-14):
253# http://www.lanacion.com.ar/04/06/10/de_609078.asp ...
254# "The time change in Tierra del Fuego was a conflicted decision from
255# the start. The government had decreed that the measure would take
256# effect on June 1, but a normative error forced the new time to begin
257# three days earlier, from a Saturday to a Sunday....
258# Our understanding was that the change was originally scheduled to take place
259# on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other
260# provinces). Sunday was May 30, only two days earlier. So the article
261# contains a contradiction. I would give more credence to the Saturday/Sunday
262# date than the "three days earlier" phrase, and conclude that Tierra del
263# Fuego set its clocks back at 2004-05-30 00:00.
264#
265# From Steffen Thorsen (2004-10-05):
266# The previous law 7210 which changed the province of Mendoza's time zone
267# back in May have been modified slightly in a new law 7277, which set the
268# new end date to 2004-09-26 (original date was 2004-10-17).
269# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf
270#
271# From Mariano Absatz (2004-10-05):
272# San Juan changed from UTC-03:00 to UTC-04:00 at midnight between
273# Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00
274# at midnight between Saturday, July 24th and Sunday, July 25th....
275# http://www.sanjuan.gov.ar/prensa/archivo/000329.html
276# http://www.sanjuan.gov.ar/prensa/archivo/000426.html
277# http://www.sanjuan.gov.ar/prensa/archivo/000441.html
278
279# From Alex Krivenyshev (2008-01-17):
280# Here are articles that Argentina Province San Luis is planning to end DST
281# as earlier as upcoming Monday January 21, 2008 or February 2008:
282#
283# Provincia argentina retrasa reloj y marca diferencia con resto del pa��s
284# (Argentine Province delayed clock and mark difference with the rest of the
285# country)
286# http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel
287#
288# Es inminente que en San Luis atrasen una hora los relojes
289# (It is imminent in San Luis clocks one hour delay)
290# http://www.lagaceta.com.ar/nota/253414/Economia/Es-inminente-que-en-San-Luis-atrasen-una-hora-los-relojes.html
291# http://www.worldtimezone.net/dst_news/dst_news_argentina02.html
292
293# From Jesper N��rgaard Welen (2008-01-18):
294# The page of the San Luis provincial government
295# http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812
296# confirms what Alex Krivenyshev has earlier sent to the tz
297# emailing list about that San Luis plans to return to standard
298# time much earlier than the rest of the country. It also
299# confirms that upon request the provinces San Juan and Mendoza
300# refused to follow San Luis in this change.
301#
302# The change is supposed to take place Monday the 21st at 0:00
303# hours. As far as I understand it if this goes ahead, we need
304# a new timezone for San Luis (although there are also documented
305# independent changes in the southamerica file of San Luis in
306# 1990 and 1991 which has not been confirmed).
307
308# From Jesper N��rgaard Welen (2008-01-25):
309# Unfortunately the below page has become defunct, about the San Luis
310# time change. Perhaps because it now is part of a group of pages "Most
311# important pages of 2008."
312#
313# You can use
314# http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834
315# instead it seems. Or use "Buscador" from the main page of the San Luis
316# government, and fill in "huso" and click OK, and you will get 3 pages
317# from which the first one is identical to the above.
318
319# From Mariano Absatz (2008-01-28):
320# I can confirm that the Province of San Luis (and so far only that
321# province) decided to go back to UTC-3 effective midnight Jan 20th 2008
322# (that is, Monday 21st at 0:00 is the time the clocks were delayed back
323# 1 hour), and they intend to keep UTC-3 as their timezone all year round
324# (that is, unless they change their mind any minute now).
325#
326# So we'll have to add yet another city to 'southamerica' (I think San
327# Luis city is the mos populated city in the Province, so it'd be
328# America/Argentina/San_Luis... of course I can't remember if San Luis's
329# history of particular changes goes along with Mendoza or San Juan :-(
330# (I only remember not being able to collect hard facts about San Luis
331# back in 2004, when these provinces changed to UTC-4 for a few days, I
332# mailed them personally and never got an answer).
333
334# From Paul Eggert (2014-08-12):
335# Unless otherwise specified, data entries are from Shanks & Pottenger through
336# 1992, from the IATA otherwise. As noted below, Shanks & Pottenger say that
337# America/Cordoba split into 6 subregions during 1991/1992, one of which
338# was America/San_Luis, but we haven't verified this yet so for now we'll
339# keep America/Cordoba a single region rather than splitting it into the
340# other 5 subregions.
341
342# From Mariano Absatz (2009-03-13):
343# Yesterday (with our usual 2-day notice) the Province of San Luis
344# decided that next Sunday instead of "staying" @utc-03:00 they will go
345# to utc-04:00 until the second Saturday in October...
346#
347# The press release is at
348# http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102
349# (I couldn't find the decree, but www.sanluis.gov.ar
350# is the official page for the Province Government.)
351#
352# There's also a note in only one of the major national papers ...
353# http://www.lanacion.com.ar/nota.asp?nota_id=1107912
354#
355# The press release says [quick and dirty translation]:
356# ... announced that next Sunday, at 00:00, Puntanos (the San Luis
357# inhabitants) will have to turn back one hour their clocks
358#
359# Since then, San Luis will establish its own Province timezone. Thus,
360# during 2009, this timezone change will run from 00:00 the third Sunday
361# in March until 24:00 of the second Saturday in October.
362
363# From Mariano Absatz (2009-10-16):
364# ...the Province of San Luis is a case in itself.
365#
366# The Law at
367# http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276
368# is ambiguous because establishes a calendar from the 2nd Sunday in
369# October at 0:00 thru the 2nd Saturday in March at 24:00 and the
370# complement of that starting on the 2nd Sunday of March at 0:00 and
371# ending on the 2nd Saturday of March at 24:00.
372#
373# This clearly breaks every time the 1st of March or October is a Sunday.
374#
375# IMHO, the "spirit of the Law" is to make the changes at 0:00 on the 2nd
376# Sunday of October and March.
377#
378# The problem is that the changes in the rest of the Provinces that did
379# change in 2007/2008, were made according to the Federal Law and Decrees
380# that did so on the 3rd Sunday of October and March.
381#
382# In fact, San Luis actually switched from UTC-4 to UTC-3 last Sunday
383# (October 11th) at 0:00.
384#
385# So I guess a new set of rules, besides "Arg", must be made and the last
386# America/Argentina/San_Luis entries should change to use these...
387#
388# I'm enclosing a patch that does what I say... regretfully, the San Luis
389# timezone must be called "WART/WARST" even when most of the time (like,
390# right now) WARST == ART... that is, since last Sunday, all the country
391# is using UTC-3, but in my patch, San Luis calls it "WARST" and the rest
392# of the country calls it "ART".
393# ...
394
395# From Alexander Krivenyshev (2010-04-09):
396# According to news reports from El Diario de la Rep��blica Province San
397# Luis, Argentina (standard time UTC-04) will keep Daylight Saving Time
398# after April 11, 2010 - will continue to have same time as rest of
399# Argentina (UTC-3) (no DST).
400#
401# Confirmaron la pr��rroga del huso horario de verano (Spanish)
402# http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9
403# or (some English translation):
404# http://www.worldtimezone.com/dst_news/dst_news_argentina08.html
405
406# From Mariano Absatz (2010-04-12):
407# yes...I can confirm this...and given that San Luis keeps calling
408# UTC-03:00 "summer time", we should't just let San Luis go back to "Arg"
409# rules...San Luis is still using "Western ARgentina Time" and it got
410# stuck on Summer daylight savings time even though the summer is over.
411
412# From Paul Eggert (2013-09-05):
413# Perhaps San Luis operates on the legal fiction that it is at -04
414# with perpetual summer time, but ordinary usage typically seems to
415# just say it's at -03; see, for example,
416# http://es.wikipedia.org/wiki/Hora_oficial_argentina
417# We've documented similar situations as being plain changes to
418# standard time, so let's do that here too. This does not change UTC
419# offsets, only tm_isdst and the time zone abbreviations. One minor
420# plus is that this silences a zic complaint that there's no POSIX TZ
421# setting for time stamps past 2038.
422
423# From Paul Eggert (2013-02-21):
424# Milne says C��rdoba time was -4:16:48.2. Round to the nearest second.
425
426# Zone NAME GMTOFF RULES FORMAT [UNTIL]
427#
428# Buenos Aires (BA), Capital Federal (CF),
429Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31
430 -4:16:48 - CMT 1920 May # C��rdoba Mean Time
431 -4:00 - ART 1930 Dec
432 -4:00 Arg AR%sT 1969 Oct 5
433 -3:00 Arg AR%sT 1999 Oct 3
434 -4:00 Arg AR%sT 2000 Mar 3
435 -3:00 Arg AR%sT
436#
437# C��rdoba (CB), Santa Fe (SF), Entre R��os (ER), Corrientes (CN), Misiones (MN),
438# Chaco (CC), Formosa (FM), Santiago del Estero (SE)
439#
440# Shanks & Pottenger also make the following claims, which we haven't verified:
441# - Formosa switched to -3:00 on 1991-01-07.
442# - Misiones switched to -3:00 on 1990-12-29.
443# - Chaco switched to -3:00 on 1991-01-04.
444# - Santiago del Estero switched to -4:00 on 1991-04-01,
445# then to -3:00 on 1991-04-26.
446#
447Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31
448 -4:16:48 - CMT 1920 May
449 -4:00 - ART 1930 Dec
450 -4:00 Arg AR%sT 1969 Oct 5
451 -3:00 Arg AR%sT 1991 Mar 3
452 -4:00 - WART 1991 Oct 20
453 -3:00 Arg AR%sT 1999 Oct 3
454 -4:00 Arg AR%sT 2000 Mar 3
455 -3:00 Arg AR%sT
456#
457# Salta (SA), La Pampa (LP), Neuqu��n (NQ), Rio Negro (RN)
458Zone America/Argentina/Salta -4:21:40 - LMT 1894 Oct 31
459 -4:16:48 - CMT 1920 May
460 -4:00 - ART 1930 Dec
461 -4:00 Arg AR%sT 1969 Oct 5
462 -3:00 Arg AR%sT 1991 Mar 3
463 -4:00 - WART 1991 Oct 20
464 -3:00 Arg AR%sT 1999 Oct 3
465 -4:00 Arg AR%sT 2000 Mar 3
466 -3:00 Arg AR%sT 2008 Oct 18
467 -3:00 - ART
468#
469# Tucum��n (TM)
470Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31
471 -4:16:48 - CMT 1920 May
472 -4:00 - ART 1930 Dec
473 -4:00 Arg AR%sT 1969 Oct 5
474 -3:00 Arg AR%sT 1991 Mar 3
475 -4:00 - WART 1991 Oct 20
476 -3:00 Arg AR%sT 1999 Oct 3
477 -4:00 Arg AR%sT 2000 Mar 3
478 -3:00 - ART 2004 Jun 1
479 -4:00 - WART 2004 Jun 13
480 -3:00 Arg AR%sT
481#
482# La Rioja (LR)
483Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31
484 -4:16:48 - CMT 1920 May
485 -4:00 - ART 1930 Dec
486 -4:00 Arg AR%sT 1969 Oct 5
487 -3:00 Arg AR%sT 1991 Mar 1
488 -4:00 - WART 1991 May 7
489 -3:00 Arg AR%sT 1999 Oct 3
490 -4:00 Arg AR%sT 2000 Mar 3
491 -3:00 - ART 2004 Jun 1
492 -4:00 - WART 2004 Jun 20
493 -3:00 Arg AR%sT 2008 Oct 18
494 -3:00 - ART
495#
496# San Juan (SJ)
497Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31
498 -4:16:48 - CMT 1920 May
499 -4:00 - ART 1930 Dec
500 -4:00 Arg AR%sT 1969 Oct 5
501 -3:00 Arg AR%sT 1991 Mar 1
502 -4:00 - WART 1991 May 7
503 -3:00 Arg AR%sT 1999 Oct 3
504 -4:00 Arg AR%sT 2000 Mar 3
505 -3:00 - ART 2004 May 31
506 -4:00 - WART 2004 Jul 25
507 -3:00 Arg AR%sT 2008 Oct 18
508 -3:00 - ART
509#
510# Jujuy (JY)
511Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31
512 -4:16:48 - CMT 1920 May
513 -4:00 - ART 1930 Dec
514 -4:00 Arg AR%sT 1969 Oct 5
515 -3:00 Arg AR%sT 1990 Mar 4
516 -4:00 - WART 1990 Oct 28
517 -4:00 1:00 WARST 1991 Mar 17
518 -4:00 - WART 1991 Oct 6
519 -3:00 1:00 ARST 1992
520 -3:00 Arg AR%sT 1999 Oct 3
521 -4:00 Arg AR%sT 2000 Mar 3
522 -3:00 Arg AR%sT 2008 Oct 18
523 -3:00 - ART
524#
525# Catamarca (CT), Chubut (CH)
526Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31
527 -4:16:48 - CMT 1920 May
528 -4:00 - ART 1930 Dec
529 -4:00 Arg AR%sT 1969 Oct 5
530 -3:00 Arg AR%sT 1991 Mar 3
531 -4:00 - WART 1991 Oct 20
532 -3:00 Arg AR%sT 1999 Oct 3
533 -4:00 Arg AR%sT 2000 Mar 3
534 -3:00 - ART 2004 Jun 1
535 -4:00 - WART 2004 Jun 20
536 -3:00 Arg AR%sT 2008 Oct 18
537 -3:00 - ART
538#
539# Mendoza (MZ)
540Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31
541 -4:16:48 - CMT 1920 May
542 -4:00 - ART 1930 Dec
543 -4:00 Arg AR%sT 1969 Oct 5
544 -3:00 Arg AR%sT 1990 Mar 4
545 -4:00 - WART 1990 Oct 15
546 -4:00 1:00 WARST 1991 Mar 1
547 -4:00 - WART 1991 Oct 15
548 -4:00 1:00 WARST 1992 Mar 1
549 -4:00 - WART 1992 Oct 18
550 -3:00 Arg AR%sT 1999 Oct 3
551 -4:00 Arg AR%sT 2000 Mar 3
552 -3:00 - ART 2004 May 23
553 -4:00 - WART 2004 Sep 26
554 -3:00 Arg AR%sT 2008 Oct 18
555 -3:00 - ART
556#
557# San Luis (SL)
558
559Rule SanLuis 2008 2009 - Mar Sun>=8 0:00 0 -
560Rule SanLuis 2007 2008 - Oct Sun>=8 0:00 1:00 S
561
562Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31
563 -4:16:48 - CMT 1920 May
564 -4:00 - ART 1930 Dec
565 -4:00 Arg AR%sT 1969 Oct 5
566 -3:00 Arg AR%sT 1990
567 -3:00 1:00 ARST 1990 Mar 14
568 -4:00 - WART 1990 Oct 15
569 -4:00 1:00 WARST 1991 Mar 1
570 -4:00 - WART 1991 Jun 1
571 -3:00 - ART 1999 Oct 3
572 -4:00 1:00 WARST 2000 Mar 3
573 -3:00 - ART 2004 May 31
574 -4:00 - WART 2004 Jul 25
575 -3:00 Arg AR%sT 2008 Jan 21
576 -4:00 SanLuis WAR%sT 2009 Oct 11
577 -3:00 - ART
578#
579# Santa Cruz (SC)
580Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31
581 -4:16:48 - CMT 1920 May # C��rdoba Mean Time
582 -4:00 - ART 1930 Dec
583 -4:00 Arg AR%sT 1969 Oct 5
584 -3:00 Arg AR%sT 1999 Oct 3
585 -4:00 Arg AR%sT 2000 Mar 3
586 -3:00 - ART 2004 Jun 1
587 -4:00 - WART 2004 Jun 20
588 -3:00 Arg AR%sT 2008 Oct 18
589 -3:00 - ART
590#
591# Tierra del Fuego, Ant��rtida e Islas del Atl��ntico Sur (TF)
592Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31
593 -4:16:48 - CMT 1920 May # C��rdoba Mean Time
594 -4:00 - ART 1930 Dec
595 -4:00 Arg AR%sT 1969 Oct 5
596 -3:00 Arg AR%sT 1999 Oct 3
597 -4:00 Arg AR%sT 2000 Mar 3
598 -3:00 - ART 2004 May 30
599 -4:00 - WART 2004 Jun 20
600 -3:00 Arg AR%sT 2008 Oct 18
601 -3:00 - ART
602
603# Aruba
604Link America/Curacao America/Aruba
605
606# Bolivia
607# Zone NAME GMTOFF RULES FORMAT [UNTIL]
608Zone America/La_Paz -4:32:36 - LMT 1890
609 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT
610 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST
611 -4:00 - BOT # Bolivia Time
612
613# Brazil
614
615# From Paul Eggert (1993-11-18):
616# The mayor of Rio recently attempted to change the time zone rules
617# just in his city, in order to leave more summer time for the tourist trade.
618# The rule change lasted only part of the day;
619# the federal government refused to follow the city's rules, and business
620# was in a chaos, so the mayor backed down that afternoon.
621
622# From IATA SSIM (1996-02):
623# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS),
624# Santa Catarina (SC), Paran�� (PR), S��o Paulo (SP), Rio de Janeiro (RJ),
625# Esp��rito Santo (ES), Minas Gerais (MG), Bahia (BA), Goi��s (GO),
626# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL].
627# [The last three states are new to this issue of the IATA SSIM.]
628
629# From Gwillim Law (1996-10-07):
630# Geography, history (Tocantins was part of Goi��s until 1989), and other
631# sources of time zone information lead me to believe that AL, SE, and TO were
632# always in BR1, and so the only change was whether or not they observed DST....
633# The earliest issue of the SSIM I have is 2/91. Each issue from then until
634# 9/95 says that DST is observed only in the ten states I quoted from 9/95,
635# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2
636# (UTC-4).... The other two time zones given for Brazil are BR3, which is
637# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is
638# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's
639# become part of the state of Pernambuco). The boundary between BR1 and BR2
640# has never been clearly stated. They've simply been called East and West.
641# However, some conclusions can be drawn from another IATA manual: the Airline
642# Coding Directory, which lists close to 400 airports in Brazil. For each
643# airport it gives a time zone which is coded to the SSIM. From that
644# information, I'm led to conclude that the states of Amap�� (AP), Cear�� (CE),
645# Maranh��o (MA), Para��ba (PR), Pernambuco (PE), Piau�� (PI), and Rio Grande do
646# Norte (RN), and the eastern part of Par�� (PA) are all in BR1 without DST.
647
648# From Marcos Tadeu (1998-09-27):
649# Brazilian official page <http://pcdsh01.on.br/verao1.html>
650
651# From Jesper N��rgaard (2000-11-03):
652# [For an official list of which regions in Brazil use which time zones, see:]
653# http://pcdsh01.on.br/Fusbr.htm
654# http://pcdsh01.on.br/Fusbrhv.htm
655
656# From Celso Doria via David Madeo (2002-10-09):
657# The reason for the delay this year has to do with elections in Brazil.
658#
659# Unlike in the United States, elections in Brazil are 100% computerized and
660# the results are known almost immediately. Yesterday, it was the first
661# round of the elections when 115 million Brazilians voted for President,
662# Governor, Senators, Federal Deputies, and State Deputies. Nobody is
663# counting (or re-counting) votes anymore and we know there will be a second
664# round for the Presidency and also for some Governors. The 2nd round will
665# take place on October 27th.
666#
667# The reason why the DST will only begin November 3rd is that the thousands
668# of electoral machines used cannot have their time changed, and since the
669# Constitution says the elections must begin at 8:00 AM and end at 5:00 PM,
670# the Government decided to postpone DST, instead of changing the Constitution
671# (maybe, for the next elections, it will be possible to change the clock)...
672
673# From Rodrigo Severo (2004-10-04):
674# It's just the biannual change made necessary by the much hyped, supposedly
675# modern Brazilian eletronic voting machines which, apparently, can't deal
676# with a time change between the first and the second rounds of the elections.
677
678# From Steffen Thorsen (2007-09-20):
679# Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00:
680# http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975
681
682# From Paul Schulze (2008-06-24):
683# ...by law number 11.662 of April 24, 2008 (published in the "Diario
684# Oficial da Uni��o"...) in Brazil there are changes in the timezones,
685# effective today (00:00am at June 24, 2008) as follows:
686#
687# a) The timezone UTC+5 is extinguished, with all the Acre state and the
688# part of the Amazonas state that had this timezone now being put to the
689# timezone UTC+4
690# b) The whole Par�� state now is put at timezone UTC+3, instead of just
691# part of it, as was before.
692#
693# This change follows a proposal of senator Tiao Viana of Acre state, that
694# proposed it due to concerns about open television channels displaying
695# programs inappropriate to youths in the states that had the timezone
696# UTC+5 too early in the night. In the occasion, some more corrections
697# were proposed, trying to unify the timezones of any given state. This
698# change modifies timezone rules defined in decree 2.784 of 18 June,
699# 1913.
700
701# From Rodrigo Severo (2008-06-24):
702# Just correcting the URL:
703# https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008
704#
705# As a result of the above Decree I believe the America/Rio_Branco
706# timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall
707# be created to represent the...west side of the Par�� State. I
708# suggest this new timezone be called Santarem as the most
709# important/populated city in the affected area.
710#
711# This new timezone would be the same as the Rio_Branco timezone up to
712# the 2008/06/24 change which would be to UTC-3 instead of UTC-4.
713
714# From Alex Krivenyshev (2008-06-24):
715# This is a quick reference page for New and Old Brazil Time Zones map.
716# http://www.worldtimezone.com/brazil-time-new-old.php
717#
718# - 4 time zones replaced by 3 time zones - eliminating time zone UTC-05
719# (state Acre and the part of the Amazonas will be UTC/GMT-04) - western
720# part of Par state is moving to one timezone UTC-03 (from UTC-04).
721
722# From Paul Eggert (2002-10-10):
723# The official decrees referenced below are mostly taken from
724# Decretos sobre o Hor��rio de Ver��o no Brasil.
725# http://pcdsh01.on.br/DecHV.html
726
727# From Steffen Thorsen (2008-08-29):
728# As announced by the government and many newspapers in Brazil late
729# yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and
730# it will end on 2009-02-15 (current rule for Brazil is fine). Based on
731# past years experience with the elections, there was a good chance that
732# the start was postponed to November, but it did not happen this year.
733#
734# It has not yet been posted to http://pcdsh01.on.br/DecHV.html
735#
736# An official page about it:
737# http://www.mme.gov.br/site/news/detail.do?newsId=16722
738# Note that this link does not always work directly, but must be accessed
739# by going to
740# http://www.mme.gov.br/first
741#
742# One example link that works directly:
743# http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54
744# (Portuguese)
745#
746# We have a written a short article about it as well:
747# http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html
748#
749# From Alexander Krivenyshev (2011-10-04):
750# State Bahia will return to Daylight savings time this year after 8 years off.
751# The announcement was made by Governor Jaques Wagner in an interview to a
752# television station in Salvador.
753
754# In Portuguese:
755# http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html
756# http://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html
757
758# From Guilherme Bernardes Rodrigues (2011-10-07):
759# There is news in the media, however there is still no decree about it.
760# I just send a e-mail to Zulmira Brandao at http://pcdsh01.on.br/ the
761# official agency about time in Brazil, and she confirmed that the old rule is
762# still in force.
763
764# From Guilherme Bernardes Rodrigues (2011-10-14)
765# It's official, the President signed a decree that includes Bahia in summer
766# time.
767# [ and in a second message (same day): ]
768# I found the decree.
769#
770# DECRETO No. 7.584, DE 13 DE OUTUBRO DE 2011
771# Link :
772# http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6
773
774# From Kelley Cook (2012-10-16):
775# The governor of state of Bahia in Brazil announced on Thursday that
776# due to public pressure, he is reversing the DST policy they implemented
777# last year and will not be going to Summer Time on October 21st....
778# http://www.correio24horas.com.br/r/artigo/apos-pressoes-wagner-suspende-horario-de-verao-na-bahia
779
780# From Rodrigo Severo (2012-10-16):
781# Tocantins state will have DST.
782# http://noticias.terra.com.br/brasil/noticias/0,,OI6232536-EI306.html
783
784# From Steffen Thorsen (2013-09-20):
785# Tocantins in Brazil is very likely not to observe DST from October....
786# http://conexaoto.com.br/2013/09/18/ministerio-confirma-que-tocantins-esta-fora-do-horario-de-verao-em-2013-mas-falta-publicacao-de-decreto
787# We will keep this article updated when this is confirmed:
788# http://www.timeanddate.com/news/time/brazil-starts-dst-2013.html
789
790# From Steffen Thorsen (2013-10-17):
791# http://www.timeanddate.com/news/time/acre-amazonas-change-time-zone.html
792# Senator Jorge Viana announced that Acre will change time zone on November 10.
793# He did not specify the time of the change, nor if western parts of Amazonas
794# will change as well.
795#
796# From Paul Eggert (2013-10-17):
797# For now, assume western Amazonas will change as well.
798
799# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
800# Decree 20,466 <http://pcdsh01.on.br/HV20466.htm> (1931-10-01)
801# Decree 21,896 <http://pcdsh01.on.br/HV21896.htm> (1932-01-10)
802Rule Brazil 1931 only - Oct 3 11:00 1:00 S
803Rule Brazil 1932 1933 - Apr 1 0:00 0 -
804Rule Brazil 1932 only - Oct 3 0:00 1:00 S
805# Decree 23,195 <http://pcdsh01.on.br/HV23195.htm> (1933-10-10)
806# revoked DST.
807# Decree 27,496 <http://pcdsh01.on.br/HV27496.htm> (1949-11-24)
808# Decree 27,998 <http://pcdsh01.on.br/HV27998.htm> (1950-04-13)
809Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S
810Rule Brazil 1950 only - Apr 16 1:00 0 -
811Rule Brazil 1951 1952 - Apr 1 0:00 0 -
812# Decree 32,308 <http://pcdsh01.on.br/HV32308.htm> (1953-02-24)
813Rule Brazil 1953 only - Mar 1 0:00 0 -
814# Decree 34,724 <http://pcdsh01.on.br/HV34724.htm> (1953-11-30)
815# revoked DST.
816# Decree 52,700 <http://pcdsh01.on.br/HV52700.htm> (1963-10-18)
817# established DST from 1963-10-23 00:00 to 1964-02-29 00:00
818# in SP, RJ, GB, MG, ES, due to the prolongation of the drought.
819# Decree 53,071 <http://pcdsh01.on.br/HV53071.htm> (1963-12-03)
820# extended the above decree to all of the national territory on 12-09.
821Rule Brazil 1963 only - Dec 9 0:00 1:00 S
822# Decree 53,604 <http://pcdsh01.on.br/HV53604.htm> (1964-02-25)
823# extended summer time by one day to 1964-03-01 00:00 (start of school).
824Rule Brazil 1964 only - Mar 1 0:00 0 -
825# Decree 55,639 <http://pcdsh01.on.br/HV55639.htm> (1965-01-27)
826Rule Brazil 1965 only - Jan 31 0:00 1:00 S
827Rule Brazil 1965 only - Mar 31 0:00 0 -
828# Decree 57,303 <http://pcdsh01.on.br/HV57303.htm> (1965-11-22)
829Rule Brazil 1965 only - Dec 1 0:00 1:00 S
830# Decree 57,843 <http://pcdsh01.on.br/HV57843.htm> (1966-02-18)
831Rule Brazil 1966 1968 - Mar 1 0:00 0 -
832Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S
833# Decree 63,429 <http://pcdsh01.on.br/HV63429.htm> (1968-10-15)
834# revoked DST.
835# Decree 91,698 <http://pcdsh01.on.br/HV91698.htm> (1985-09-27)
836Rule Brazil 1985 only - Nov 2 0:00 1:00 S
837# Decree 92,310 (1986-01-21)
838# Decree 92,463 (1986-03-13)
839Rule Brazil 1986 only - Mar 15 0:00 0 -
840# Decree 93,316 (1986-10-01)
841Rule Brazil 1986 only - Oct 25 0:00 1:00 S
842Rule Brazil 1987 only - Feb 14 0:00 0 -
843# Decree 94,922 <http://pcdsh01.on.br/HV94922.htm> (1987-09-22)
844Rule Brazil 1987 only - Oct 25 0:00 1:00 S
845Rule Brazil 1988 only - Feb 7 0:00 0 -
846# Decree 96,676 <http://pcdsh01.on.br/HV96676.htm> (1988-09-12)
847# except for the states of AC, AM, PA, RR, RO, and AP (then a territory)
848Rule Brazil 1988 only - Oct 16 0:00 1:00 S
849Rule Brazil 1989 only - Jan 29 0:00 0 -
850# Decree 98,077 <http://pcdsh01.on.br/HV98077.htm> (1989-08-21)
851# with the same exceptions
852Rule Brazil 1989 only - Oct 15 0:00 1:00 S
853Rule Brazil 1990 only - Feb 11 0:00 0 -
854# Decree 99,530 <http://pcdsh01.on.br/HV99530.htm> (1990-09-17)
855# adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF.
856# Decree 99,629 (1990-10-19) adds BA, MT.
857Rule Brazil 1990 only - Oct 21 0:00 1:00 S
858Rule Brazil 1991 only - Feb 17 0:00 0 -
859# Unnumbered decree <http://pcdsh01.on.br/HV1991.htm> (1991-09-25)
860# adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF.
861Rule Brazil 1991 only - Oct 20 0:00 1:00 S
862Rule Brazil 1992 only - Feb 9 0:00 0 -
863# Unnumbered decree <http://pcdsh01.on.br/HV1992.htm> (1992-10-16)
864# adopted by same states.
865Rule Brazil 1992 only - Oct 25 0:00 1:00 S
866Rule Brazil 1993 only - Jan 31 0:00 0 -
867# Decree 942 <http://pcdsh01.on.br/HV942.htm> (1993-09-28)
868# adopted by same states, plus AM.
869# Decree 1,252 <http://pcdsh01.on.br/HV1252.htm> (1994-09-22;
870# web page corrected 2004-01-07) adopted by same states, minus AM.
871# Decree 1,636 <http://pcdsh01.on.br/HV1636.htm> (1995-09-14)
872# adopted by same states, plus MT and TO.
873# Decree 1,674 <http://pcdsh01.on.br/HV1674.htm> (1995-10-13)
874# adds AL, SE.
875Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S
876Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 -
877Rule Brazil 1996 only - Feb 11 0:00 0 -
878# Decree 2,000 <http://pcdsh01.on.br/HV2000.htm> (1996-09-04)
879# adopted by same states, minus AL, SE.
880Rule Brazil 1996 only - Oct 6 0:00 1:00 S
881Rule Brazil 1997 only - Feb 16 0:00 0 -
882# From Daniel C. Sobral (1998-02-12):
883# In 1997, the DS began on October 6. The stated reason was that
884# because international television networks ignored Brazil's policy on DS,
885# they bought the wrong times on satellite for coverage of Pope's visit.
886# This year, the ending date of DS was postponed to March 1
887# to help dealing with the shortages of electric power.
888#
889# Decree 2,317 (1997-09-04), adopted by same states.
890Rule Brazil 1997 only - Oct 6 0:00 1:00 S
891# Decree 2,495 <http://pcdsh01.on.br/figuras/HV2495.JPG>
892# (1998-02-10)
893Rule Brazil 1998 only - Mar 1 0:00 0 -
894# Decree 2,780 <http://pcdsh01.on.br/figuras/Hv98.jpg> (1998-09-11)
895# adopted by the same states as before.
896Rule Brazil 1998 only - Oct 11 0:00 1:00 S
897Rule Brazil 1999 only - Feb 21 0:00 0 -
898# Decree 3,150 <http://pcdsh01.on.br/figuras/HV3150.gif>
899# (1999-08-23) adopted by same states.
900# Decree 3,188 <http://pcdsh01.on.br/DecHV99.gif> (1999-09-30)
901# adds SE, AL, PB, PE, RN, CE, PI, MA and RR.
902Rule Brazil 1999 only - Oct 3 0:00 1:00 S
903Rule Brazil 2000 only - Feb 27 0:00 0 -
904# Decree 3,592 <http://pcdsh01.on.br/DEC3592.htm> (2000-09-06)
905# adopted by the same states as before.
906# Decree 3,630 <http://pcdsh01.on.br/Dec3630.jpg> (2000-10-13)
907# repeals DST in PE and RR, effective 2000-10-15 00:00.
908# Decree 3,632 <http://pcdsh01.on.br/Dec3632.jpg> (2000-10-17)
909# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
910# Decree 3,916 <http://pcdsh01.on.br/figuras/HV3916.gif>
911# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE.
912Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S
913Rule Brazil 2001 2006 - Feb Sun>=15 0:00 0 -
914# Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE.
915# 4,399 <http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm>
916Rule Brazil 2002 only - Nov 3 0:00 1:00 S
917# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
918# 4,844 <http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm>
919Rule Brazil 2003 only - Oct 19 0:00 1:00 S
920# Decree 5,223 (2004-10-01) reestablishes DST in MT.
921# 5,223 <http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm>
922Rule Brazil 2004 only - Nov 2 0:00 1:00 S
923# Decree 5,539 <http://pcdsh01.on.br/DecHV5539.gif> (2005-09-19),
924# adopted by the same states as before.
925Rule Brazil 2005 only - Oct 16 0:00 1:00 S
926# Decree 5,920 <http://pcdsh01.on.br/DecHV5920.gif> (2006-10-03),
927# adopted by the same states as before.
928Rule Brazil 2006 only - Nov 5 0:00 1:00 S
929Rule Brazil 2007 only - Feb 25 0:00 0 -
930# Decree 6,212 <http://pcdsh01.on.br/DecHV6212.gif> (2007-09-26),
931# adopted by the same states as before.
932Rule Brazil 2007 only - Oct Sun>=8 0:00 1:00 S
933# From Frederico A. C. Neves (2008-09-10):
934# According to this decree
935# http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm
936# [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the
937# 3rd Feb Sunday. There is an exception on the return date when this is
938# the Carnival Sunday then the return date will be the next Sunday...
939Rule Brazil 2008 max - Oct Sun>=15 0:00 1:00 S
940Rule Brazil 2008 2011 - Feb Sun>=15 0:00 0 -
941Rule Brazil 2012 only - Feb Sun>=22 0:00 0 -
942Rule Brazil 2013 2014 - Feb Sun>=15 0:00 0 -
943Rule Brazil 2015 only - Feb Sun>=22 0:00 0 -
944Rule Brazil 2016 2022 - Feb Sun>=15 0:00 0 -
945Rule Brazil 2023 only - Feb Sun>=22 0:00 0 -
946Rule Brazil 2024 2025 - Feb Sun>=15 0:00 0 -
947Rule Brazil 2026 only - Feb Sun>=22 0:00 0 -
948Rule Brazil 2027 2033 - Feb Sun>=15 0:00 0 -
949Rule Brazil 2034 only - Feb Sun>=22 0:00 0 -
950Rule Brazil 2035 2036 - Feb Sun>=15 0:00 0 -
951Rule Brazil 2037 only - Feb Sun>=22 0:00 0 -
952# From Arthur David Olson (2008-09-29):
953# The next is wrong in some years but is better than nothing.
954Rule Brazil 2038 max - Feb Sun>=15 0:00 0 -
955
956# The latest ruleset listed above says that the following states observe DST:
957# DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP.
958
959# Zone NAME GMTOFF RULES FORMAT [UNTIL]
960#
961# Fernando de Noronha (administratively part of PE)
962Zone America/Noronha -2:09:40 - LMT 1914
963 -2:00 Brazil FN%sT 1990 Sep 17
964 -2:00 - FNT 1999 Sep 30
965 -2:00 Brazil FN%sT 2000 Oct 15
966 -2:00 - FNT 2001 Sep 13
967 -2:00 Brazil FN%sT 2002 Oct 1
968 -2:00 - FNT
969# Other Atlantic islands have no permanent settlement.
970# These include Trindade and Martim Vaz (administratively part of ES),
971# Rocas Atoll (RN), and the St Peter and St Paul Archipelago (PE).
972# Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01;
973# it also included the Penedos.
974#
975# Amap�� (AP), east Par�� (PA)
976# East Par�� includes Bel��m, Marab��, Serra Norte, and S��o F��lix do Xingu.
977# The division between east and west Par�� is the river Xingu.
978# In the north a very small part from the river Javary (now Jari I guess,
979# the border with Amap��) to the Amazon, then to the Xingu.
980Zone America/Belem -3:13:56 - LMT 1914
981 -3:00 Brazil BR%sT 1988 Sep 12
982 -3:00 - BRT
983#
984# west Par�� (PA)
985# West Par�� includes Altamira, ��bidos, Prainha, Oriximin��, and Santar��m.
986Zone America/Santarem -3:38:48 - LMT 1914
987 -4:00 Brazil AM%sT 1988 Sep 12
988 -4:00 - AMT 2008 Jun 24 0:00
989 -3:00 - BRT
990#
991# Maranh��o (MA), Piau�� (PI), Cear�� (CE), Rio Grande do Norte (RN),
992# Para��ba (PB)
993Zone America/Fortaleza -2:34:00 - LMT 1914
994 -3:00 Brazil BR%sT 1990 Sep 17
995 -3:00 - BRT 1999 Sep 30
996 -3:00 Brazil BR%sT 2000 Oct 22
997 -3:00 - BRT 2001 Sep 13
998 -3:00 Brazil BR%sT 2002 Oct 1
999 -3:00 - BRT
1000#
1001# Pernambuco (PE) (except Atlantic islands)
1002Zone America/Recife -2:19:36 - LMT 1914
1003 -3:00 Brazil BR%sT 1990 Sep 17
1004 -3:00 - BRT 1999 Sep 30
1005 -3:00 Brazil BR%sT 2000 Oct 15
1006 -3:00 - BRT 2001 Sep 13
1007 -3:00 Brazil BR%sT 2002 Oct 1
1008 -3:00 - BRT
1009#
1010# Tocantins (TO)
1011Zone America/Araguaina -3:12:48 - LMT 1914
1012 -3:00 Brazil BR%sT 1990 Sep 17
1013 -3:00 - BRT 1995 Sep 14
1014 -3:00 Brazil BR%sT 2003 Sep 24
1015 -3:00 - BRT 2012 Oct 21
1016 -3:00 Brazil BR%sT 2013 Sep
1017 -3:00 - BRT
1018#
1019# Alagoas (AL), Sergipe (SE)
1020Zone America/Maceio -2:22:52 - LMT 1914
1021 -3:00 Brazil BR%sT 1990 Sep 17
1022 -3:00 - BRT 1995 Oct 13
1023 -3:00 Brazil BR%sT 1996 Sep 4
1024 -3:00 - BRT 1999 Sep 30
1025 -3:00 Brazil BR%sT 2000 Oct 22
1026 -3:00 - BRT 2001 Sep 13
1027 -3:00 Brazil BR%sT 2002 Oct 1
1028 -3:00 - BRT
1029#
1030# Bahia (BA)
1031# There are too many Salvadors elsewhere, so use America/Bahia instead
1032# of America/Salvador.
1033Zone America/Bahia -2:34:04 - LMT 1914
1034 -3:00 Brazil BR%sT 2003 Sep 24
1035 -3:00 - BRT 2011 Oct 16
1036 -3:00 Brazil BR%sT 2012 Oct 21
1037 -3:00 - BRT
1038#
1039# Goi��s (GO), Distrito Federal (DF), Minas Gerais (MG),
1040# Esp��rito Santo (ES), Rio de Janeiro (RJ), S��o Paulo (SP), Paran�� (PR),
1041# Santa Catarina (SC), Rio Grande do Sul (RS)
1042Zone America/Sao_Paulo -3:06:28 - LMT 1914
1043 -3:00 Brazil BR%sT 1963 Oct 23 0:00
1044 -3:00 1:00 BRST 1964
1045 -3:00 Brazil BR%sT
1046#
1047# Mato Grosso do Sul (MS)
1048Zone America/Campo_Grande -3:38:28 - LMT 1914
1049 -4:00 Brazil AM%sT
1050#
1051# Mato Grosso (MT)
1052Zone America/Cuiaba -3:44:20 - LMT 1914
1053 -4:00 Brazil AM%sT 2003 Sep 24
1054 -4:00 - AMT 2004 Oct 1
1055 -4:00 Brazil AM%sT
1056#
1057# Rond��nia (RO)
1058Zone America/Porto_Velho -4:15:36 - LMT 1914
1059 -4:00 Brazil AM%sT 1988 Sep 12
1060 -4:00 - AMT
1061#
1062# Roraima (RR)
1063Zone America/Boa_Vista -4:02:40 - LMT 1914
1064 -4:00 Brazil AM%sT 1988 Sep 12
1065 -4:00 - AMT 1999 Sep 30
1066 -4:00 Brazil AM%sT 2000 Oct 15
1067 -4:00 - AMT
1068#
1069# east Amazonas (AM): Boca do Acre, Juta��, Manaus, Floriano Peixoto
1070# The great circle line from Tabatinga to Porto Acre divides
1071# east from west Amazonas.
1072Zone America/Manaus -4:00:04 - LMT 1914
1073 -4:00 Brazil AM%sT 1988 Sep 12
1074 -4:00 - AMT 1993 Sep 28
1075 -4:00 Brazil AM%sT 1994 Sep 22
1076 -4:00 - AMT
1077#
1078# west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant,
1079# Eirunep��, Envira, Ipixuna
1080Zone America/Eirunepe -4:39:28 - LMT 1914
1081 -5:00 Brazil AC%sT 1988 Sep 12
1082 -5:00 - ACT 1993 Sep 28
1083 -5:00 Brazil AC%sT 1994 Sep 22
1084 -5:00 - ACT 2008 Jun 24 0:00
1085 -4:00 - AMT 2013 Nov 10
1086 -5:00 - ACT
1087#
1088# Acre (AC)
1089Zone America/Rio_Branco -4:31:12 - LMT 1914
1090 -5:00 Brazil AC%sT 1988 Sep 12
1091 -5:00 - ACT 2008 Jun 24 0:00
1092 -4:00 - AMT 2013 Nov 10
1093 -5:00 - ACT
1094
1095# Chile
1096
1097# From Paul Eggert (2015-04-03):
1098# Shanks & Pottenger says America/Santiago introduced standard time in
1099# 1890 and rounds its UTC offset to 70W40; guess that in practice this
1100# was the same offset as in 1916-1919. It also says Pacific/Easter
1101# standardized on 109W22 in 1890; assume this didn't change the clocks.
1102#
1103# Dates for America/Santiago from 1910 to 2004 are primarily from
1104# the following source, cited by Oscar van Vlijmen (2006-10-08):
1105# [1] Chile Law
1106# http://www.webexhibits.org/daylightsaving/chile.html
1107# This contains a copy of a this official table:
1108# Cambios en la hora oficial de Chile desde 1900 (retrieved 2008-03-30)
1109# http://web.archive.org/web/20080330200901/http://www.horaoficial.cl/cambio.htm
1110# [1] needs several corrections, though.
1111#
1112# The first set of corrections is from:
1113# [2] History of the Official Time of Chile
1114# http://www.horaoficial.cl/ing/horaof_ing.html (retrieved 2012-03-06). See:
1115# http://web.archive.org/web/20120306042032/http://www.horaoficial.cl/ing/horaof_ing.html
1116# This is an English translation of:
1117# Historia de la hora oficial de Chile (retrieved 2012-10-24). See:
1118# http://web.archive.org/web/20121024234627/http://www.horaoficial.cl/horaof.htm
1119# A fancier Spanish version (requiring mouse-clicking) is at:
1120# http://www.horaoficial.cl/historia_hora.html
1121# Conflicts between [1] and [2] were resolved as follows:
1122#
1123# - [1] says the 1910 transition was Jan 1, [2] says Jan 10 and cites
1124# Bolet��n No. 1, Aviso No. 1 (1910). Go with [2].
1125#
1126# - [1] says SMT was -4:42:45, [2] says Chile's official time from
1127# 1916 to 1919 was -4:42:46.3, the meridian of Chile's National
1128# Astronomical Observatory (OAN), then located in what is now
1129# Quinta Normal in Santiago. Go with [2], rounding it to -4:42:46.
1130#
1131# - [1] says the 1918 transition was Sep 1, [2] says Sep 10 and cites
1132# Bolet��n No. 22, Aviso No. 129/1918 (1918-08-23). Go with [2].
1133#
1134# - [1] does not give times for transitions; assume they occur
1135# at midnight mainland time, the current common practice. However,
1136# go with [2]'s specification of 23:00 for the 1947-05-21 transition.
1137#
1138# Another correction to [1] is from Jesper N��rgaard Welen, who
1139# wrote (2006-10-08), "I think that there are some obvious mistakes in
1140# the suggested link from Oscar van Vlijmen,... for instance entry 66
1141# says that GMT-4 ended 1990-09-12 while entry 67 only begins GMT-3 at
1142# 1990-09-15 (they should have been 1990-09-15 and 1990-09-16
1143# respectively), but anyhow it clears up some doubts too."
1144#
1145# Data for Pacific/Easter from 1910 through 1967 come from Shanks &
1146# Pottenger. After that, for lack of better info assume
1147# Pacific/Easter is always two hours behind America/Santiago;
1148# this is known to work for DST transitions starting in 2008 and
1149# may well be true for earlier transitions.
1150
1151# From Eduardo Krell (1995-10-19):
1152# The law says to switch to DST at midnight [24:00] on the second SATURDAY
1153# of October.... The law is the same for March and October.
1154# (1998-09-29):
1155# Because of the drought this year, the government decided to go into
1156# DST earlier (saturday 9/26 at 24:00). This is a one-time change only ...
1157# (unless there's another dry season next year, I guess).
1158
1159# From Julio I. Pacheco Troncoso (1999-03-18):
1160# Because of the same drought, the government decided to end DST later,
1161# on April 3, (one-time change).
1162
1163# From Germ��n Poo-Caama��o (2008-03-03):
1164# Due to drought, Chile extends Daylight Time in three weeks. This
1165# is one-time change (Saturday 3/29 at 24:00 for America/Santiago
1166# and Saturday 3/29 at 22:00 for Pacific/Easter)
1167# The Supreme Decree is located at
1168# http://www.shoa.cl/servicios/supremo316.pdf
1169#
1170# From Jos�� Miguel Garrido (2008-03-05):
1171# http://www.shoa.cl/noticias/2008/04hora/hora.htm
1172
1173# From Angel Chiang (2010-03-04):
1174# Subject: DST in Chile exceptionally extended to 3 April due to earthquake
1175# http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098
1176#
1177# From Arthur David Olson (2010-03-06):
1178# Angel Chiang's message confirmed by Julio Pacheco; Julio provided a patch.
1179
1180# From Glenn Eychaner (2011-03-28):
1181# http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E}
1182# In English:
1183# Chile's clocks will go back an hour this year on the 7th of May instead
1184# of this Saturday. They will go forward again the 3rd Saturday in
1185# August, not in October as they have since 1968.
1186
1187# From Mauricio Parada (2012-02-22), translated by Glenn Eychaner (2012-02-23):
1188# As stated in the website of the Chilean Energy Ministry
1189# http://www.minenergia.cl/ministerio/noticias/generales/gobierno-anuncia-fechas-de-cambio-de.html
1190# The Chilean Government has decided to postpone the entrance into winter time
1191# (to leave DST) from March 11 2012 to April 28th 2012....
1192# Quote from the website communication:
1193#
1194# 6. For the year 2012, the dates of entry into winter time will be as follows:
1195# a. Saturday April 28, 2012, clocks should go back 60 minutes; that is, at
1196# 23:59:59, instead of passing to 0:00, the time should be adjusted to be 23:00
1197# of the same day.
1198# b. Saturday, September 1, 2012, clocks should go forward 60 minutes; that is,
1199# at 23:59:59, instead of passing to 0:00, the time should be adjusted to be
1200# 01:00 on September 2.
1201
1202# From Steffen Thorsen (2013-02-15):
1203# According to several news sources, Chile has extended DST this year,
1204# they will end DST later and start DST earlier than planned. They
1205# hope to save energy. The new end date is 2013-04-28 00:00 and new
1206# start date is 2013-09-08 00:00....
1207# http://www.gob.cl/informa/2013/02/15/gobierno-anuncia-fechas-de-cambio-de-hora-para-el-ano-2013.htm
1208
1209# From Jos�� Miguel Garrido (2014-02-19):
1210# Today appeared in the Diario Oficial a decree amending the time change
1211# dates to 2014.
1212# DST End: last Saturday of April 2014 (Sun 27 Apr 2014 03:00 UTC)
1213# DST Start: first Saturday of September 2014 (Sun 07 Sep 2014 04:00 UTC)
1214# http://www.diariooficial.interior.gob.cl//media/2014/02/19/do-20140219.pdf
1215
1216# From Eduardo Romero Urra (2015-03-03):
1217# Today has been published officially that Chile will use the DST time
1218# permanently until March 25 of 2017
1219# http://www.diariooficial.interior.gob.cl/media/2015/03/03/1-large.jpg
1220#
1221# From Paul Eggert (2015-03-03):
1222# For now, assume that the extension will persist indefinitely.
1223
1224# From Juan Correa (2016-03-18):
1225# The decree regarding DST has been published in today's Official Gazette:
1226# http://www.diariooficial.interior.gob.cl/versiones-anteriores/do/20160318/
1227# http://www.leychile.cl/Navegar?idNorma=1088502
1228# It does consider the second Saturday of May and August as the dates
1229# for the transition; and it lists DST dates until 2019, but I think
1230# this scheme will stick.
1231#
1232# From Paul Eggert (2016-03-18):
1233# For now, assume the pattern holds for the indefinite future.
1234# The decree says transitions occur at 24:00; in practice this appears
1235# to mean 24:00 mainland time, not 24:00 local time, so that Easter
1236# Island is always two hours behind the mainland.
1237
1238# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1239Rule Chile 1927 1931 - Sep 1 0:00 1:00 S
1240Rule Chile 1928 1932 - Apr 1 0:00 0 -
1241Rule Chile 1968 only - Nov 3 4:00u 1:00 S
1242Rule Chile 1969 only - Mar 30 3:00u 0 -
1243Rule Chile 1969 only - Nov 23 4:00u 1:00 S
1244Rule Chile 1970 only - Mar 29 3:00u 0 -
1245Rule Chile 1971 only - Mar 14 3:00u 0 -
1246Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S
1247Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 -
1248Rule Chile 1973 only - Sep 30 4:00u 1:00 S
1249Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S
1250Rule Chile 1987 only - Apr 12 3:00u 0 -
1251Rule Chile 1988 1990 - Mar Sun>=9 3:00u 0 -
1252Rule Chile 1988 1989 - Oct Sun>=9 4:00u 1:00 S
1253Rule Chile 1990 only - Sep 16 4:00u 1:00 S
1254Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 -
1255Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S
1256Rule Chile 1997 only - Mar 30 3:00u 0 -
1257Rule Chile 1998 only - Mar Sun>=9 3:00u 0 -
1258Rule Chile 1998 only - Sep 27 4:00u 1:00 S
1259Rule Chile 1999 only - Apr 4 3:00u 0 -
1260Rule Chile 1999 2010 - Oct Sun>=9 4:00u 1:00 S
1261Rule Chile 2000 2007 - Mar Sun>=9 3:00u 0 -
1262# N.B.: the end of March 29 in Chile is March 30 in Universal time,
1263# which is used below in specifying the transition.
1264Rule Chile 2008 only - Mar 30 3:00u 0 -
1265Rule Chile 2009 only - Mar Sun>=9 3:00u 0 -
1266Rule Chile 2010 only - Apr Sun>=1 3:00u 0 -
1267Rule Chile 2011 only - May Sun>=2 3:00u 0 -
1268Rule Chile 2011 only - Aug Sun>=16 4:00u 1:00 S
1269Rule Chile 2012 2014 - Apr Sun>=23 3:00u 0 -
1270Rule Chile 2012 2014 - Sep Sun>=2 4:00u 1:00 S
1271Rule Chile 2016 max - May Sun>=9 3:00u 0 -
1272Rule Chile 2016 max - Aug Sun>=9 4:00u 1:00 S
1273# IATA SSIM anomalies: (1992-02) says 1992-03-14;
1274# (1996-09) says 1998-03-08. Ignore these.
1275# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1276Zone America/Santiago -4:42:46 - LMT 1890
1277 -4:42:46 - SMT 1910 Jan 10 # Santiago Mean Time
1278 -5:00 - CLT 1916 Jul 1 # Chile Time
1279 -4:42:46 - SMT 1918 Sep 10
1280 -4:00 - CLT 1919 Jul 1
1281 -4:42:46 - SMT 1927 Sep 1
1282 -5:00 Chile CL%sT 1932 Sep 1
1283 -4:00 - CLT 1942 Jun 1
1284 -5:00 - CLT 1942 Aug 1
1285 -4:00 - CLT 1946 Jul 15
1286 -4:00 1:00 CLST 1946 Sep 1 # central Chile
1287 -4:00 - CLT 1947 Apr 1
1288 -5:00 - CLT 1947 May 21 23:00
1289 -4:00 Chile CL%sT
1290Zone Pacific/Easter -7:17:28 - LMT 1890
1291 -7:17:28 - EMT 1932 Sep # Easter Mean Time
1292 -7:00 Chile EAS%sT 1982 Mar 14 3:00u # Easter Time
1293 -6:00 Chile EAS%sT
1294#
1295# Salas y G��mez Island is uninhabited.
1296# Other Chilean locations, including Juan Fern��ndez Is, Desventuradas Is,
1297# and Antarctic bases, are like America/Santiago.
1298
1299# Antarctic base using South American rules
1300# (See the file 'antarctica' for more.)
1301#
1302# Palmer, Anvers Island, since 1965 (moved 2 miles in 1968)
1303#
1304# From Ethan Dicks (1996-10-06):
1305# It keeps the same time as Punta Arenas, Chile, because, just like us
1306# and the South Pole, that's the other end of their supply line....
1307# I verified with someone who was there that since 1980,
1308# Palmer has followed Chile. Prior to that, before the Falklands War,
1309# Palmer used to be supplied from Argentina.
1310#
1311# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1312Zone Antarctica/Palmer 0 - -00 1965
1313 -4:00 Arg AR%sT 1969 Oct 5
1314 -3:00 Arg AR%sT 1982 May
1315 -4:00 Chile CL%sT
1316
1317# Colombia
1318
1319# Milne gives 4:56:16.4 for Bogot�� time in 1899; round to nearest. He writes,
1320# "A variation of fifteen minutes in the public clocks of Bogota is not rare."
1321
1322# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1323Rule CO 1992 only - May 3 0:00 1:00 S
1324Rule CO 1993 only - Apr 4 0:00 0 -
1325# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1326Zone America/Bogota -4:56:16 - LMT 1884 Mar 13
1327 -4:56:16 - BMT 1914 Nov 23 # Bogot�� Mean Time
1328 -5:00 CO CO%sT # Colombia Time
1329# Malpelo, Providencia, San Andres
1330# no information; probably like America/Bogota
1331
1332# Cura��ao
1333
1334# Milne gives 4:35:46.9 for Cura��ao mean time; round to nearest.
1335#
1336# From Paul Eggert (2006-03-22):
1337# Shanks & Pottenger say that The Bottom and Philipsburg have been at
1338# -4:00 since standard time was introduced on 1912-03-02; and that
1339# Kralendijk and Rincon used Kralendijk Mean Time (-4:33:08) from
1340# 1912-02-02 to 1965-01-01. The former is dubious, since S&P also say
1341# Saba Island has been like Cura��ao.
1342# This all predates our 1970 cutoff, though.
1343#
1344# By July 2007 Cura��ao and St Maarten are planned to become
1345# associated states within the Netherlands, much like Aruba;
1346# Bonaire, Saba and St Eustatius would become directly part of the
1347# Netherlands as Kingdom Islands. This won't affect their time zones
1348# though, as far as we know.
1349#
1350# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1351Zone America/Curacao -4:35:47 - LMT 1912 Feb 12 # Willemstad
1352 -4:30 - ANT 1965 # Netherlands Antilles Time
1353 -4:00 - AST
1354
1355# From Arthur David Olson (2011-06-15):
1356# use links for places with new iso3166 codes.
1357# The name "Lower Prince's Quarter" is both longer than fourteen characters
1358# and contains an apostrophe; use "Lower_Princes" below.
1359
1360Link America/Curacao America/Lower_Princes # Sint Maarten
1361Link America/Curacao America/Kralendijk # Caribbean Netherlands
1362
1363# Ecuador
1364#
1365# Milne says the Central and South American Telegraph Company used -5:24:15.
1366#
1367# From Paul Eggert (2007-03-04):
1368# Apparently Ecuador had a failed experiment with DST in 1992.
1369# <http://midena.gov.ec/content/view/1261/208/> (2007-02-27) and
1370# <http://www.hoy.com.ec/NoticiaNue.asp?row_id=249856> (2006-11-06) both
1371# talk about "hora Sixto". Leave this alone for now, as we have no data.
1372#
1373# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1374Zone America/Guayaquil -5:19:20 - LMT 1890
1375 -5:14:00 - QMT 1931 # Quito Mean Time
1376 -5:00 - ECT # Ecuador Time
1377Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno
1378 -5:00 - ECT 1986
1379 -6:00 - GALT # Gal��pagos Time
1380
1381# Falklands
1382
1383# From Paul Eggert (2006-03-22):
1384# Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except
1385# the IATA gives 1996-09-08. Go with Shanks & Pottenger.
1386
1387# From Falkland Islands Government Office, London (2001-01-22)
1388# via Jesper N��rgaard:
1389# ... the clocks revert back to Local Mean Time at 2 am on Sunday 15
1390# April 2001 and advance one hour to summer time at 2 am on Sunday 2
1391# September. It is anticipated that the clocks will revert back at 2
1392# am on Sunday 21 April 2002 and advance to summer time at 2 am on
1393# Sunday 1 September.
1394
1395# From Rives McDow (2001-02-13):
1396#
1397# I have communicated several times with people there, and the last
1398# time I had communications that was helpful was in 1998. Here is
1399# what was said then:
1400#
1401# "The general rule was that Stanley used daylight saving and the Camp
1402# did not. However for various reasons many people in the Camp have
1403# started to use daylight saving (known locally as 'Stanley Time')
1404# There is no rule as to who uses daylight saving - it is a matter of
1405# personal choice and so it is impossible to draw a map showing who
1406# uses it and who does not. Any list would be out of date as soon as
1407# it was produced. This year daylight saving ended on April 18/19th
1408# and started again on September 12/13th. I do not know what the rule
1409# is, but can find out if you like. We do not change at the same time
1410# as UK or Chile."
1411#
1412# I did have in my notes that the rule was "Second Saturday in Sep at
1413# 0:00 until third Saturday in Apr at 0:00". I think that this does
1414# not agree in some cases with Shanks; is this true?
1415#
1416# Also, there is no mention in the list that some areas in the
1417# Falklands do not use DST. I have found in my communications there
1418# that these areas are on the western half of East Falkland and all of
1419# West Falkland. Stanley is the only place that consistently observes
1420# DST. Again, as in other places in the world, the farmers don't like
1421# it. West Falkland is almost entirely sheep farmers.
1422#
1423# I know one lady there that keeps a list of which farm keeps DST and
1424# which doesn't each year. She runs a shop in Stanley, and says that
1425# the list changes each year. She uses it to communicate to her
1426# customers, catching them when they are home for lunch or dinner.
1427
1428# From Paul Eggert (2001-03-05):
1429# For now, we'll just record the time in Stanley, since we have no
1430# better info.
1431
1432# From Steffen Thorsen (2011-04-01):
1433# The Falkland Islands will not turn back clocks this winter, but stay on
1434# daylight saving time.
1435#
1436# One source:
1437# http://www.falklandnews.com/public/story.cfm?get=5914&source=3
1438#
1439# We have gotten this confirmed by a clerk of the legislative assembly:
1440# Normally the clocks revert to Local Mean Time (UTC/GMT -4 hours) on the
1441# third Sunday of April at 0200hrs and advance to Summer Time (UTC/GMT -3
1442# hours) on the first Sunday of September at 0200hrs.
1443#
1444# IMPORTANT NOTE: During 2011, on a trial basis, the Falkland Islands
1445# will not revert to local mean time, but clocks will remain on Summer
1446# time (UTC/GMT - 3 hours) throughout the whole of 2011. Any long term
1447# change to local time following the trial period will be notified.
1448#
1449# From Andrew Newman (2012-02-24)
1450# A letter from Justin McPhee, Chief Executive,
1451# Cable & Wireless Falkland Islands (dated 2012-02-22)
1452# states...
1453# The current Atlantic/Stanley entry under South America expects the
1454# clocks to go back to standard Falklands Time (FKT) on the 15th April.
1455# The database entry states that in 2011 Stanley was staying on fixed
1456# summer time on a trial basis only. FIG need to contact IANA and/or
1457# the maintainers of the database to inform them we're adopting
1458# the same policy this year and suggest recommendations for future years.
1459#
1460# For now we will assume permanent summer time for the Falklands
1461# until advised differently (to apply for 2012 and beyond, after the 2011
1462# experiment was apparently successful.)
1463# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1464Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S
1465Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 -
1466Rule Falk 1939 only - Oct 1 0:00 1:00 S
1467Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S
1468Rule Falk 1943 only - Jan 1 0:00 0 -
1469Rule Falk 1983 only - Sep lastSun 0:00 1:00 S
1470Rule Falk 1984 1985 - Apr lastSun 0:00 0 -
1471Rule Falk 1984 only - Sep 16 0:00 1:00 S
1472Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S
1473Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 -
1474Rule Falk 2001 2010 - Apr Sun>=15 2:00 0 -
1475Rule Falk 2001 2010 - Sep Sun>=1 2:00 1:00 S
1476# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1477Zone Atlantic/Stanley -3:51:24 - LMT 1890
1478 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time
1479 -4:00 Falk FK%sT 1983 May # Falkland Is Time
1480 -3:00 Falk FK%sT 1985 Sep 15
1481 -4:00 Falk FK%sT 2010 Sep 5 2:00
1482 -3:00 - FKST
1483
1484# French Guiana
1485# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1486Zone America/Cayenne -3:29:20 - LMT 1911 Jul
1487 -4:00 - GFT 1967 Oct # French Guiana Time
1488 -3:00 - GFT
1489
1490# Guyana
1491# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1492Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown
1493 -3:45 - GBGT 1966 May 26 # Br Guiana Time
1494 -3:45 - GYT 1975 Jul 31 # Guyana Time
1495 -3:00 - GYT 1991
1496# IATA SSIM (1996-06) says -4:00. Assume a 1991 switch.
1497 -4:00 - GYT
1498
1499# Paraguay
1500#
1501# From Paul Eggert (2006-03-22):
1502# Shanks & Pottenger say that spring transitions are 01:00 -> 02:00,
1503# and autumn transitions are 00:00 -> 23:00. Go with pre-1999
1504# editions of Shanks, and with the IATA, who say transitions occur at 00:00.
1505#
1506# From Waldemar Villamayor-Venialbo (2013-09-20):
1507# No time of the day is established for the adjustment, so people normally
1508# adjust their clocks at 0 hour of the given dates.
1509#
1510# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1511Rule Para 1975 1988 - Oct 1 0:00 1:00 S
1512Rule Para 1975 1978 - Mar 1 0:00 0 -
1513Rule Para 1979 1991 - Apr 1 0:00 0 -
1514Rule Para 1989 only - Oct 22 0:00 1:00 S
1515Rule Para 1990 only - Oct 1 0:00 1:00 S
1516Rule Para 1991 only - Oct 6 0:00 1:00 S
1517Rule Para 1992 only - Mar 1 0:00 0 -
1518Rule Para 1992 only - Oct 5 0:00 1:00 S
1519Rule Para 1993 only - Mar 31 0:00 0 -
1520Rule Para 1993 1995 - Oct 1 0:00 1:00 S
1521Rule Para 1994 1995 - Feb lastSun 0:00 0 -
1522Rule Para 1996 only - Mar 1 0:00 0 -
1523# IATA SSIM (2000-02) says 1999-10-10; ignore this for now.
1524# From Steffen Thorsen (2000-10-02):
1525# I have three independent reports that Paraguay changed to DST this Sunday
1526# (10-01).
1527#
1528# Translated by Gwillim Law (2001-02-27) from
1529# Noticias, a daily paper in Asunci��n, Paraguay (2000-10-01):
1530# http://www.diarionoticias.com.py/011000/nacional/naciona1.htm
1531# Starting at 0:00 today, the clock will be set forward 60 minutes, in
1532# fulfillment of Decree No. 7,273 of the Executive Power.... The time change
1533# system has been operating for several years. Formerly there was a separate
1534# decree each year; the new law has the same effect, but permanently. Every
1535# year, the time will change on the first Sunday of October; likewise, the
1536# clock will be set back on the first Sunday of March.
1537#
1538Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S
1539# IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger.
1540Rule Para 1997 only - Feb lastSun 0:00 0 -
1541# Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but
1542# (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27).
1543Rule Para 1998 2001 - Mar Sun>=1 0:00 0 -
1544# From Rives McDow (2002-02-28):
1545# A decree was issued in Paraguay (No. 16350) on 2002-02-26 that changed the
1546# dst method to be from the first Sunday in September to the first Sunday in
1547# April.
1548Rule Para 2002 2004 - Apr Sun>=1 0:00 0 -
1549Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S
1550#
1551# From Jesper N��rgaard Welen (2005-01-02):
1552# There are several sources that claim that Paraguay made
1553# a timezone rule change in autumn 2004.
1554# From Steffen Thorsen (2005-01-05):
1555# Decree 1,867 (2004-03-05)
1556# From Carlos Ra��l Perasso via Jesper N��rgaard Welen (2006-10-13)
1557# http://www.presidencia.gov.py/decretos/D1867.pdf
1558Rule Para 2004 2009 - Oct Sun>=15 0:00 1:00 S
1559Rule Para 2005 2009 - Mar Sun>=8 0:00 0 -
1560# From Carlos Ra��l Perasso (2010-02-18):
1561# By decree number 3958 issued yesterday
1562# http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf
1563# Paraguay changes its DST schedule, postponing the March rule to April and
1564# modifying the October date. The decree reads:
1565# ...
1566# Art. 1. It is hereby established that from the second Sunday of the month of
1567# April of this year (2010), the official time is to be set back 60 minutes,
1568# and that on the first Sunday of the month of October, it is to be set
1569# forward 60 minutes, in all the territory of the Paraguayan Republic.
1570# ...
1571Rule Para 2010 max - Oct Sun>=1 0:00 1:00 S
1572Rule Para 2010 2012 - Apr Sun>=8 0:00 0 -
1573#
1574# From Steffen Thorsen (2013-03-07):
1575# Paraguay will end DST on 2013-03-24 00:00....
1576# http://www.ande.gov.py/interna.php?id=1075
1577#
1578# From Carlos Ra��l Perasso (2013-03-15):
1579# The change in Paraguay is now final. Decree number 10780
1580# http://www.presidencia.gov.py/uploads/pdf/presidencia-3b86ff4b691c79d4f5927ca964922ec74772ce857c02ca054a52a37b49afc7fb.pdf
1581# From Carlos Ra��l Perasso (2014-02-28):
1582# Decree 1264 can be found at:
1583# http://www.presidencia.gov.py/archivos/documentos/DECRETO1264_ey9r8zai.pdf
1584Rule Para 2013 max - Mar Sun>=22 0:00 0 -
1585
1586# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1587Zone America/Asuncion -3:50:40 - LMT 1890
1588 -3:50:40 - AMT 1931 Oct 10 # Asunci��n Mean Time
1589 -4:00 - PYT 1972 Oct # Paraguay Time
1590 -3:00 - PYT 1974 Apr
1591 -4:00 Para PY%sT
1592
1593# Peru
1594#
1595# From Evelyn C. Leeper via Mark Brader (2003-10-26)
1596# <news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net>:
1597# When we were in Peru in 1985-1986, they apparently switched over
1598# sometime between December 29 and January 3 while we were on the Amazon.
1599#
1600# From Paul Eggert (2006-03-22):
1601# Shanks & Pottenger don't have this transition. Assume 1986 was like 1987.
1602
1603# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1604Rule Peru 1938 only - Jan 1 0:00 1:00 S
1605Rule Peru 1938 only - Apr 1 0:00 0 -
1606Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S
1607Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 -
1608Rule Peru 1986 1987 - Jan 1 0:00 1:00 S
1609Rule Peru 1986 1987 - Apr 1 0:00 0 -
1610Rule Peru 1990 only - Jan 1 0:00 1:00 S
1611Rule Peru 1990 only - Apr 1 0:00 0 -
1612# IATA is ambiguous for 1993/1995; go with Shanks & Pottenger.
1613Rule Peru 1994 only - Jan 1 0:00 1:00 S
1614Rule Peru 1994 only - Apr 1 0:00 0 -
1615# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1616Zone America/Lima -5:08:12 - LMT 1890
1617 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time?
1618 -5:00 Peru PE%sT # Peru Time
1619
1620# South Georgia
1621# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1622Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken
1623 -2:00 - GST # South Georgia Time
1624
1625# South Sandwich Is
1626# uninhabited; scientific personnel have wintered
1627
1628# Suriname
1629# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1630Zone America/Paramaribo -3:40:40 - LMT 1911
1631 -3:40:52 - PMT 1935 # Paramaribo Mean Time
1632 -3:40:36 - PMT 1945 Oct # The capital moved?
1633 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time
1634 -3:30 - SRT 1984 Oct # Suriname Time
1635 -3:00 - SRT
1636
1637# Trinidad and Tobago
1638# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1639Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2
1640 -4:00 - AST
1641
1642# These all agree with Trinidad and Tobago since 1970.
1643Link America/Port_of_Spain America/Anguilla
1644Link America/Port_of_Spain America/Antigua
1645Link America/Port_of_Spain America/Dominica
1646Link America/Port_of_Spain America/Grenada
1647Link America/Port_of_Spain America/Guadeloupe
1648Link America/Port_of_Spain America/Marigot # St Martin (French part)
1649Link America/Port_of_Spain America/Montserrat
1650Link America/Port_of_Spain America/St_Barthelemy # St Barth��lemy
1651Link America/Port_of_Spain America/St_Kitts # St Kitts & Nevis
1652Link America/Port_of_Spain America/St_Lucia
1653Link America/Port_of_Spain America/St_Thomas # Virgin Islands (US)
1654Link America/Port_of_Spain America/St_Vincent
1655Link America/Port_of_Spain America/Tortola # Virgin Islands (UK)
1656
1657# Uruguay
1658# From Paul Eggert (1993-11-18):
1659# Uruguay wins the prize for the strangest peacetime manipulation of the rules.
1660# From Shanks & Pottenger:
1661# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1662# Whitman gives 1923 Oct 1; go with Shanks & Pottenger.
1663Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS
1664Rule Uruguay 1924 1926 - Apr 1 0:00 0 -
1665Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS
1666Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS
1667# Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman.
1668Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 -
1669Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS
1670Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 -
1671# Whitman gives 1937 Oct 3; go with Shanks & Pottenger.
1672Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS
1673# Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13,
1674# and 1943 Apr 13 "to present time"; go with Shanks & Pottenger.
1675Rule Uruguay 1941 only - Aug 1 0:00 0:30 HS
1676Rule Uruguay 1942 only - Jan 1 0:00 0 -
1677Rule Uruguay 1942 only - Dec 14 0:00 1:00 S
1678Rule Uruguay 1943 only - Mar 14 0:00 0 -
1679Rule Uruguay 1959 only - May 24 0:00 1:00 S
1680Rule Uruguay 1959 only - Nov 15 0:00 0 -
1681Rule Uruguay 1960 only - Jan 17 0:00 1:00 S
1682Rule Uruguay 1960 only - Mar 6 0:00 0 -
1683Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S
1684Rule Uruguay 1965 only - Sep 26 0:00 0 -
1685Rule Uruguay 1966 1967 - Oct 31 0:00 0 -
1686Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS
1687Rule Uruguay 1968 1970 - Dec 2 0:00 0 -
1688Rule Uruguay 1972 only - Apr 24 0:00 1:00 S
1689Rule Uruguay 1972 only - Aug 15 0:00 0 -
1690Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS
1691Rule Uruguay 1974 only - Dec 22 0:00 1:00 S
1692Rule Uruguay 1976 only - Oct 1 0:00 0 -
1693Rule Uruguay 1977 only - Dec 4 0:00 1:00 S
1694Rule Uruguay 1978 only - Apr 1 0:00 0 -
1695Rule Uruguay 1979 only - Oct 1 0:00 1:00 S
1696Rule Uruguay 1980 only - May 1 0:00 0 -
1697Rule Uruguay 1987 only - Dec 14 0:00 1:00 S
1698Rule Uruguay 1988 only - Mar 14 0:00 0 -
1699Rule Uruguay 1988 only - Dec 11 0:00 1:00 S
1700Rule Uruguay 1989 only - Mar 12 0:00 0 -
1701Rule Uruguay 1989 only - Oct 29 0:00 1:00 S
1702# Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2,
1703# and that 1992/3's DST was from 10-25 to 03-01. Go with IATA.
1704Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 -
1705Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S
1706Rule Uruguay 1992 only - Oct 18 0:00 1:00 S
1707Rule Uruguay 1993 only - Feb 28 0:00 0 -
1708# From Eduardo Cota (2004-09-20):
1709# The Uruguayan government has decreed a change in the local time....
1710# http://www.presidencia.gub.uy/decretos/2004091502.htm
1711Rule Uruguay 2004 only - Sep 19 0:00 1:00 S
1712# From Steffen Thorsen (2005-03-11):
1713# Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to
1714# save energy ... it was postponed two weeks....
1715# http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm
1716Rule Uruguay 2005 only - Mar 27 2:00 0 -
1717# From Eduardo Cota (2005-09-27):
1718# http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF
1719# This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at
1720# 02:00 local time, official time in Uruguay will be at GMT -2.
1721Rule Uruguay 2005 only - Oct 9 2:00 1:00 S
1722Rule Uruguay 2006 only - Mar 12 2:00 0 -
1723# From Jesper N��rgaard Welen (2006-09-06):
1724# http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF
1725#
1726# From Steffen Thorsen (2015-06-30):
1727# ... it looks like they will not be using DST the coming summer:
1728# http://www.elobservador.com.uy/gobierno-resolvio-que-no-habra-cambio-horario-verano-n656787
1729# http://www.republica.com.uy/este-ano-no-se-modificara-el-huso-horario-en-uruguay/523760/
1730# From Paul Eggert (2015-06-30):
1731# Apparently restaurateurs complained that DST caused people to go to the beach
1732# instead of out to dinner.
1733# From Pablo Camargo (2015-07-13):
1734# http://archivo.presidencia.gub.uy/sci/decretos/2015/06/cons_min_201.pdf
1735# [dated 2015-06-29; repeals Decree 311/006 dated 2006-09-04]
1736Rule Uruguay 2006 2014 - Oct Sun>=1 2:00 1:00 S
1737Rule Uruguay 2007 2015 - Mar Sun>=8 2:00 0 -
1738# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1739Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28
1740 -3:44:44 - MMT 1920 May 1 # Montevideo MT
1741 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time
1742 -3:00 Uruguay UY%sT
1743
1744# Venezuela
1745#
1746# From Paul Eggert (2015-07-28):
1747# For the 1965 transition see Gaceta Oficial No. 27.619 (1964-12-15), p 205.533
1748# http://www.pgr.gob.ve/dmdocuments/1964/27619.pdf
1749#
1750# From John Stainforth (2007-11-28):
1751# ... the change for Venezuela originally expected for 2007-12-31 has
1752# been brought forward to 2007-12-09. The official announcement was
1753# published today in the "Gaceta Oficial de la Rep��blica Bolivariana
1754# de Venezuela, n��mero 38.819" (official document for all laws or
1755# resolution publication)
1756# http://www.globovision.com/news.php?nid=72208
1757
1758# From Alexander Krivenyshev (2016-04-15):
1759# https://actualidad.rt.com/actualidad/204758-venezuela-modificar-huso-horario-sequia-elnino
1760#
1761# From Paul Eggert (2016-04-15):
1762# Clocks advance 30 minutes on 2016-05-01 at 02:30....
1763# "'Venezuela's new time-zone: hours without light, hours without water,
1764# hours of presidential broadcasts, hours of lines,' quipped comedian
1765# Jean Mary Curr�� ...". See: Cawthorne A, Kai D. Venezuela scraps
1766# half-hour time difference set by Chavez. Reuters 2016-04-15 14:50 -0400
1767# http://www.reuters.com/article/us-venezuela-timezone-idUSKCN0XC2BE
1768#
1769# From Matt Johnson (2016-04-20):
1770# ... published in the official Gazette [2016-04-18], here:
1771# http://historico.tsj.gob.ve/gaceta_ext/abril/1842016/E-1842016-4551.pdf
1772
1773# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1774Zone America/Caracas -4:27:44 - LMT 1890
1775 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time?
1776 -4:30 - VET 1965 Jan 1 0:00 # Venezuela T.
1777 -4:00 - VET 2007 Dec 9 3:00
1778 -4:30 - VET 2016 May 1 2:30
1779 -4:00 - VET