Sync zoneinfo database with tzdata2008h from elsie.
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0fbb2fac 1# @(#)southamerica 8.30
34850bd5 2# <pre>
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3
4# This data 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@elsie.nci.nih.gov for general use in the future).
7
bd7414aa 8# From Paul Eggert (2006-03-22):
984263bc 9# A good source for time zone historical data outside the U.S. is
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10# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
11# San Diego: ACS Publications, Inc. (2003).
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12#
13# Gwillim Law writes that a good source
14# for recent time zone data is the International Air Transport
15# Association's Standard Schedules Information Manual (IATA SSIM),
16# published semiannually. Law sent in several helpful summaries
17# of the IATA's data after 1990.
18#
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19# Except where otherwise noted, Shanks & Pottenger is the source for
20# entries through 1990, and IATA SSIM is the source for entries afterwards.
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21#
22# Earlier editions of these tables used the North American style (e.g. ARST and
23# ARDT for Argentine Standard and Daylight Time), but the following quote
24# suggests that it's better to use European style (e.g. ART and ARST).
25# I suggest the use of _Summer time_ instead of the more cumbersome
26# _daylight-saving time_. _Summer time_ seems to be in general use
27# in Europe and South America.
28# -- E O Cutler, _New York Times_ (1937-02-14), quoted in
29# H L Mencken, _The American Language: Supplement I_ (1960), p 466
30#
31# Earlier editions of these tables also used the North American style
32# for time zones in Brazil, but this was incorrect, as Brazilians say
33# "summer time". Reinaldo Goulart, a Sao Paulo businessman active in
34# the railroad sector, writes (1999-07-06):
35# The subject of time zones is currently a matter of discussion/debate in
36# Brazil. Let's say that "the Brasilia time" is considered the
37# "official time" because Brasilia is the capital city.
38# The other three time zones are called "Brasilia time "minus one" or
39# "plus one" or "plus two". As far as I know there is no such
40# name/designation as "Eastern Time" or "Central Time".
41# So I invented the following (English-language) abbreviations for now.
42# Corrections are welcome!
43# std dst
44# -2:00 FNT FNST Fernando de Noronha
45# -3:00 BRT BRST Brasilia
46# -4:00 AMT AMST Amazon
47# -5:00 ACT ACST Acre
48
49###############################################################################
50
51###############################################################################
52
53# Argentina
54
55# From Bob Devine (1988-01-28):
56# Argentina: first Sunday in October to first Sunday in April since 1976.
57# Double Summer time from 1969 to 1974. Switches at midnight.
58
59# From U. S. Naval Observatory (1988-01-199):
60# ARGENTINA 3 H BEHIND UTC
61
9ffe4b14 62# From Hernan G. Otero (1995-06-26):
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63# I am sending modifications to the Argentine time zone table...
64# AR was chosen because they are the ISO letters that represent Argentina.
65
66# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
67Rule Arg 1930 only - Dec 1 0:00 1:00 S
68Rule Arg 1931 only - Apr 1 0:00 0 -
69Rule Arg 1931 only - Oct 15 0:00 1:00 S
70Rule Arg 1932 1940 - Mar 1 0:00 0 -
71Rule Arg 1932 1939 - Nov 1 0:00 1:00 S
72Rule Arg 1940 only - Jul 1 0:00 1:00 S
73Rule Arg 1941 only - Jun 15 0:00 0 -
74Rule Arg 1941 only - Oct 15 0:00 1:00 S
75Rule Arg 1943 only - Aug 1 0:00 0 -
76Rule Arg 1943 only - Oct 15 0:00 1:00 S
77Rule Arg 1946 only - Mar 1 0:00 0 -
78Rule Arg 1946 only - Oct 1 0:00 1:00 S
79Rule Arg 1963 only - Oct 1 0:00 0 -
80Rule Arg 1963 only - Dec 15 0:00 1:00 S
81Rule Arg 1964 1966 - Mar 1 0:00 0 -
82Rule Arg 1964 1966 - Oct 15 0:00 1:00 S
83Rule Arg 1967 only - Apr 2 0:00 0 -
84Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S
85Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 -
86Rule Arg 1974 only - Jan 23 0:00 1:00 S
87Rule Arg 1974 only - May 1 0:00 0 -
88Rule Arg 1988 only - Dec 1 0:00 1:00 S
89#
9ffe4b14 90# From Hernan G. Otero (1995-06-26):
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91# These corrections were contributed by InterSoft Argentina S.A.,
92# obtaining the data from the:
93# Talleres de Hidrografia Naval Argentina
94# (Argentine Naval Hydrography Institute)
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95Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 -
96Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S
97#
9ffe4b14 98# From Hernan G. Otero (1995-06-26):
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99# From this moment on, the law that mandated the daylight saving
100# time corrections was derogated and no more modifications
101# to the time zones (for daylight saving) are now made.
102#
103# From Rives McDow (2000-01-10):
104# On October 3, 1999, 0:00 local, Argentina implemented daylight savings time,
105# which did not result in the switch of a time zone, as they stayed 9 hours
106# from the International Date Line.
107Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S
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108# From Paul Eggert (2007-12-28):
109# DST was set to expire on March 5, not March 3, but since it was converted
110# to standard time on March 3 it's more convenient for us to pretend that
111# it ended on March 3.
112Rule Arg 2000 only - Mar 3 0:00 0 -
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113#
114# From Peter Gradelski via Steffen Thorsen (2000-03-01):
115# We just checked with our Sao Paulo office and they say the government of
116# Argentina decided not to become one of the countries that go on or off DST.
117# So Buenos Aires should be -3 hours from GMT at all times.
118#
9ffe4b14 119# From Fabian L. Arce Jofre (2000-04-04):
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120# The law that claimed DST for Argentina was derogated by President Fernando
121# de la Rua on March 2, 2000, because it would make people spend more energy
122# in the winter time, rather than less. The change took effect on March 3.
123#
124# From Mariano Absatz (2001-06-06):
125# one of the major newspapers here in Argentina said that the 1999
126# Timezone Law (which never was effectively applied) will (would?) be
127# in effect.... The article is at
128# http://ar.clarin.com/diario/2001-06-06/e-01701.htm
129# ... The Law itself is "Ley No 25155", sanctioned on 1999-08-25, enacted
130# 1999-09-17, and published 1999-09-21. The official publication is at:
131# http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF
132# Regretfully, you have to subscribe (and pay) for the on-line version....
133#
134# (2001-06-12):
135# the timezone for Argentina will not change next Sunday.
136# Apparently it will do so on Sunday 24th....
137# http://ar.clarin.com/diario/2001-06-12/s-03501.htm
138#
139# (2001-06-25):
140# Last Friday (yes, the last working day before the date of the change), the
141# Senate annulled the 1999 law that introduced the changes later postponed.
142# http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm
143# It remains the vote of the Deputies..., but it will be the same....
144# This kind of things had always been done this way in Argentina.
145# We are still -03:00 all year round in all of the country.
146#
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147# From Steffen Thorsen (2007-12-21):
148# A user (Leonardo Chaim) reported that Argentina will adopt DST....
149# all of the country (all Zone-entries) are affected. News reports like
150# http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate
151# that Argentina will use DST next year as well, from October to
152# March, although exact rules are not given.
153#
154# From Jesper Norgaard Welen (2007-12-26)
155# The last hurdle of Argentina DST is over, the proposal was approved in
156# the lower chamber too (Deputados) with a vote 192 for and 2 against.
157# By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to
158# the original scanned proposal, where the dates and the zero hours are
159# clear and unambiguous...This is the article about final approval:
160# <a href="http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996">
161# http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996
162# </a>
163#
164# From Paul Eggert (2007-12-22):
165# For dates after mid-2008, the following rules are my guesses and
166# are quite possibly wrong, but are more likely than no DST at all.
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167
168# From Alexander Krivenyshev (2008-09-05):
169# As per message from Carlos Alberto Fonseca Arauz (Nicaragua),
170# Argentina will start DST on Sunday October 19, 2008.
171#
172# <a href="http://www.worldtimezone.com/dst_news/dst_news_argentina03.html">
173# http://www.worldtimezone.com/dst_news/dst_news_argentina03.html
174# </a>
175# OR
176# <a href="http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish)">
177# http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish)
178# </a>
179
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180# From Rodrigo Severo (2008-10-06):
181# Here is some info available at a Gentoo bug related to TZ on Argentina's DST:
182# ...
183# ------- Comment #1 from [jmdocile] 2008-10-06 16:28 0000 -------
184# Hi, there is a problem with timezone-data-2008e and maybe with
185# timezone-data-2008f
186# Argentinian law [Number] 25.155 is no longer valid.
187# <a href="http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm">
188# http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm
189# </a>
190# The new one is law [Number] 26.350
191# <a href="http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm">
192# http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm
193# </a>
194# So there is no summer time in Argentina for now.
195
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196Rule Arg 2007 only - Dec 30 0:00 1:00 S
197Rule Arg 2008 max - Mar Sun>=15 0:00 0 -
234dfcd0 198Rule Arg 2008 max - Oct Sun>=15 0:00 1:00 S
cd57c7c2 199
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200# From Mariano Absatz (2004-05-21):
201# Today it was officially published that the Province of Mendoza is changing
202# its timezone this winter... starting tomorrow night....
203# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf
204# From Paul Eggert (2004-05-24):
205# It's Law No. 7,210. This change is due to a public power emergency, so for
206# now we'll assume it's for this year only.
984263bc 207#
bd7414aa 208# From Paul Eggert (2006-03-22):
984263bc 209# <a href="http://www.spicasc.net/horvera.html">
bd7414aa 210# Hora de verano para la Republica Argentina (2003-06-08)
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211# </a> says that standard time in Argentina from 1894-10-31
212# to 1920-05-01 was -4:16:48.25. Go with this more-precise value
bd7414aa 213# over Shanks & Pottenger.
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214#
215# From Mariano Absatz (2004-06-05):
216# These media articles from a major newspaper mostly cover the current state:
217# http://www.lanacion.com.ar/04/05/27/de_604825.asp
218# http://www.lanacion.com.ar/04/05/28/de_605203.asp
219#
220# The following eight (8) provinces pulled clocks back to UTC-04:00 at
221# midnight Monday May 31st. (that is, the night between 05/31 and 06/01).
222# Apparently, all nine provinces would go back to UTC-03:00 at the same
223# time in October 17th.
224#
225# Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz,
226# Tierra del Fuego, Tucuman.
227#
228# From Mariano Absatz (2004-06-14):
229# ... this weekend, the Province of Tucuman decided it'd go back to UTC-03:00
230# yesterday midnight (that is, at 24:00 Saturday 12th), since the people's
231# annoyance with the change is much higher than the power savings obtained....
232#
233# From Gwillim Law (2004-06-14):
234# http://www.lanacion.com.ar/04/06/10/de_609078.asp ...
235# "The time change in Tierra del Fuego was a conflicted decision from
236# the start. The government had decreed that the measure would take
237# effect on June 1, but a normative error forced the new time to begin
238# three days earlier, from a Saturday to a Sunday....
239# Our understanding was that the change was originally scheduled to take place
240# on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other
241# provinces). Sunday was May 30, only two days earlier. So the article
242# contains a contradiction. I would give more credence to the Saturday/Sunday
243# date than the "three days earlier" phrase, and conclude that Tierra del
244# Fuego set its clocks back at 2004-05-30 00:00.
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245#
246# From Steffen Thorsen (2004-10-05):
247# The previous law 7210 which changed the province of Mendoza's time zone
248# back in May have been modified slightly in a new law 7277, which set the
249# new end date to 2004-09-26 (original date was 2004-10-17).
250# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf
251#
252# From Mariano Absatz (2004-10-05):
253# San Juan changed from UTC-03:00 to UTC-04:00 at midnight between
254# Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00
255# at midnight between Saturday, July 24th and Sunday, July 25th....
256# http://www.sanjuan.gov.ar/prensa/archivo/000329.html
257# http://www.sanjuan.gov.ar/prensa/archivo/000426.html
258# http://www.sanjuan.gov.ar/prensa/archivo/000441.html
984263bc 259
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260# From Alex Krivenyshev (2008-01-17):
261# Here are articles that Argentina Province San Luis is planning to end DST
262# as earlier as upcoming Monday January 21, 2008 or February 2008:
263#
264# Provincia argentina retrasa reloj y marca diferencia con resto del pais
265# (Argentine Province delayed clock and mark difference with the rest of the
266# country)
267# <a href="http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel">
268# http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel
269# </a>
270#
271# Es inminente que en San Luis atrasen una hora los relojes
272# (It is imminent in San Luis clocks one hour delay)
273# <a href="http://www.lagaceta.com.ar/vernotae.asp?id_nota=253414">
274# http://www.lagaceta.com.ar/vernotae.asp?id_nota=253414
275# </a>
276#
277# <a href="http://www.worldtimezone.net/dst_news/dst_news_argentina02.html">
278# http://www.worldtimezone.net/dst_news/dst_news_argentina02.html
279# </a>
280
281# From Jesper Norgaard Welen (2008-01-18):
282# The page of the San Luis provincial government
283# <a href="http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812">
284# http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812
285# </a>
286# confirms what Alex Krivenyshev has earlier sent to the tz
287# emailing list about that San Luis plans to return to standard
288# time much earlier than the rest of the country. It also
289# confirms that upon request the provinces San Juan and Mendoza
290# refused to follow San Luis in this change.
291#
292# The change is supposed to take place Monday the 21.st at 0:00
293# hours. As far as I understand it if this goes ahead, we need
294# a new timezone for San Luis (although there are also documented
295# independent changes in the southamerica file of San Luis in
296# 1990 and 1991 which has not been confirmed).
297
298# From Jesper Norgaard Welen (2008-01-25):
299# Unfortunately the below page has become defunct, about the San Luis
300# time change. Perhaps because it now is part of a group of pages "Most
301# important pages of 2008."
302#
303# You can use
304# <a href="http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834">
305# http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834
306# </a>
307# instead it seems. Or use "Buscador" from the main page of the San Luis
308# government, and fill in "huso" and click OK, and you will get 3 pages
309# from which the first one is identical to the above.
310
311# From Mariano Absatz (2008-01-28):
312# I can confirm that the Province of San Luis (and so far only that
313# province) decided to go back to UTC-3 effective midnight Jan 20th 2008
314# (that is, Monday 21st at 0:00 is the time the clocks were delayed back
315# 1 hour), and they intend to keep UTC-3 as their timezone all year round
316# (that is, unless they change their mind any minute now).
317#
318# So we'll have to add yet another city to 'southamerica' (I think San
319# Luis city is the mos populated city in the Province, so it'd be
320# America/Argentina/San_Luis... of course I can't remember if San Luis's
321# history of particular changes goes along with Mendoza or San Juan :-(
322# (I only remember not being able to collect hard facts about San Luis
323# back in 2004, when these provinces changed to UTC-4 for a few days, I
324# mailed them personally and never got an answer).
325
a36b983e 326# From Paul Eggert (2008-06-30):
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327# Unless otherwise specified, data are from Shanks & Pottenger through 1992,
328# from the IATA otherwise. As noted below, Shanks & Pottenger say that
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329# America/Cordoba split into 6 subregions during 1991/1992, one of which
330# was America/San_Luis, but we haven't verified this yet so for now we'll
331# keep America/Cordoba a single region rather than splitting it into the
332# other 5 subregions.
333
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334#
335# Zone NAME GMTOFF RULES FORMAT [UNTIL]
336#
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337# Buenos Aires (BA), Capital Federal (CF),
338Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31
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339 -4:16:48 - CMT 1920 May # Cordoba Mean Time
340 -4:00 - ART 1930 Dec
341 -4:00 Arg AR%sT 1969 Oct 5
342 -3:00 Arg AR%sT 1999 Oct 3
343 -4:00 Arg AR%sT 2000 Mar 3
cd57c7c2 344 -3:00 Arg AR%sT
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345#
346# Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN), Chaco (CC),
ba5ba9da 347# Formosa (FM), Salta (SA), Santiago del Estero (SE), Cordoba (CB),
a36b983e 348# La Pampa (LP), Neuquen (NQ), Rio Negro (RN)
984263bc 349#
bd7414aa 350# Shanks & Pottenger also make the following claims, which we haven't verified:
984263bc 351# - Formosa switched to -3:00 on 1991-01-07.
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352# - Misiones switched to -3:00 on 1990-12-29.
353# - Chaco switched to -3:00 on 1991-01-04.
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354# - Santiago del Estero switched to -4:00 on 1991-04-01,
355# then to -3:00 on 1991-04-26.
984263bc 356#
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357Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31
358 -4:16:48 - CMT 1920 May
359 -4:00 - ART 1930 Dec
360 -4:00 Arg AR%sT 1969 Oct 5
361 -3:00 Arg AR%sT 1991 Mar 3
362 -4:00 - WART 1991 Oct 20
363 -3:00 Arg AR%sT 1999 Oct 3
364 -4:00 Arg AR%sT 2000 Mar 3
cd57c7c2 365 -3:00 Arg AR%sT
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366#
367# Tucuman (TM)
368Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31
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369 -4:16:48 - CMT 1920 May
370 -4:00 - ART 1930 Dec
371 -4:00 Arg AR%sT 1969 Oct 5
372 -3:00 Arg AR%sT 1991 Mar 3
373 -4:00 - WART 1991 Oct 20
374 -3:00 Arg AR%sT 1999 Oct 3
375 -4:00 Arg AR%sT 2000 Mar 3
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376 -3:00 - ART 2004 Jun 1
377 -4:00 - WART 2004 Jun 13
cd57c7c2 378 -3:00 Arg AR%sT
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379#
380# La Rioja (LR)
381Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31
382 -4:16:48 - CMT 1920 May
383 -4:00 - ART 1930 Dec
384 -4:00 Arg AR%sT 1969 Oct 5
385 -3:00 Arg AR%sT 1991 Mar 1
386 -4:00 - WART 1991 May 7
387 -3:00 Arg AR%sT 1999 Oct 3
388 -4:00 Arg AR%sT 2000 Mar 3
389 -3:00 - ART 2004 Jun 1
390 -4:00 - WART 2004 Jun 20
cd57c7c2 391 -3:00 Arg AR%sT
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392#
393# San Juan (SJ)
394Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31
395 -4:16:48 - CMT 1920 May
396 -4:00 - ART 1930 Dec
397 -4:00 Arg AR%sT 1969 Oct 5
398 -3:00 Arg AR%sT 1991 Mar 1
399 -4:00 - WART 1991 May 7
400 -3:00 Arg AR%sT 1999 Oct 3
401 -4:00 Arg AR%sT 2000 Mar 3
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402 -3:00 - ART 2004 May 31
403 -4:00 - WART 2004 Jul 25
cd57c7c2 404 -3:00 Arg AR%sT
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405#
406# Jujuy (JY)
ba5ba9da 407Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31
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408 -4:16:48 - CMT 1920 May
409 -4:00 - ART 1930 Dec
410 -4:00 Arg AR%sT 1969 Oct 5
411 -3:00 Arg AR%sT 1990 Mar 4
412 -4:00 - WART 1990 Oct 28
413 -4:00 1:00 WARST 1991 Mar 17
414 -4:00 - WART 1991 Oct 6
415 -3:00 1:00 ARST 1992
416 -3:00 Arg AR%sT 1999 Oct 3
417 -4:00 Arg AR%sT 2000 Mar 3
cd57c7c2 418 -3:00 Arg AR%sT
984263bc 419#
9ffe4b14 420# Catamarca (CT), Chubut (CH)
ba5ba9da 421Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31
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422 -4:16:48 - CMT 1920 May
423 -4:00 - ART 1930 Dec
424 -4:00 Arg AR%sT 1969 Oct 5
425 -3:00 Arg AR%sT 1991 Mar 3
426 -4:00 - WART 1991 Oct 20
427 -3:00 Arg AR%sT 1999 Oct 3
428 -4:00 Arg AR%sT 2000 Mar 3
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429 -3:00 - ART 2004 Jun 1
430 -4:00 - WART 2004 Jun 20
cd57c7c2 431 -3:00 Arg AR%sT
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432#
433# Mendoza (MZ)
ba5ba9da 434Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31
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435 -4:16:48 - CMT 1920 May
436 -4:00 - ART 1930 Dec
437 -4:00 Arg AR%sT 1969 Oct 5
438 -3:00 Arg AR%sT 1990 Mar 4
439 -4:00 - WART 1990 Oct 15
440 -4:00 1:00 WARST 1991 Mar 1
441 -4:00 - WART 1991 Oct 15
442 -4:00 1:00 WARST 1992 Mar 1
443 -4:00 - WART 1992 Oct 18
444 -3:00 Arg AR%sT 1999 Oct 3
445 -4:00 Arg AR%sT 2000 Mar 3
ba5ba9da 446 -3:00 - ART 2004 May 23
bc95ec93 447 -4:00 - WART 2004 Sep 26
cd57c7c2 448 -3:00 Arg AR%sT
ba5ba9da 449#
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450# San Luis (SL)
451Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31
452 -4:16:48 - CMT 1920 May
453 -4:00 - ART 1930 Dec
454 -4:00 Arg AR%sT 1969 Oct 5
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455 -3:00 Arg AR%sT 1990
456 -3:00 1:00 ARST 1990 Mar 14
457 -4:00 - WART 1990 Oct 15
458 -4:00 1:00 WARST 1991 Mar 1
459 -4:00 - WART 1991 Jun 1
460 -3:00 - ART 1999 Oct 3
461 -4:00 1:00 WARST 2000 Mar 3
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462 -3:00 - ART 2004 May 31
463 -4:00 - WART 2004 Jul 25
464 -3:00 Arg AR%sT 2008 Jan 21
465 -3:00 - ART
466#
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467# Santa Cruz (SC)
468Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31
469 -4:16:48 - CMT 1920 May # Cordoba Mean Time
470 -4:00 - ART 1930 Dec
471 -4:00 Arg AR%sT 1969 Oct 5
472 -3:00 Arg AR%sT 1999 Oct 3
473 -4:00 Arg AR%sT 2000 Mar 3
474 -3:00 - ART 2004 Jun 1
475 -4:00 - WART 2004 Jun 20
cd57c7c2 476 -3:00 Arg AR%sT
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477#
478# Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF)
479Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31
480 -4:16:48 - CMT 1920 May # Cordoba Mean Time
481 -4:00 - ART 1930 Dec
482 -4:00 Arg AR%sT 1969 Oct 5
483 -3:00 Arg AR%sT 1999 Oct 3
484 -4:00 Arg AR%sT 2000 Mar 3
485 -3:00 - ART 2004 May 30
486 -4:00 - WART 2004 Jun 20
cd57c7c2 487 -3:00 Arg AR%sT
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488
489# Aruba
490# Zone NAME GMTOFF RULES FORMAT [UNTIL]
491Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad
492 -4:30 - ANT 1965 # Netherlands Antilles Time
493 -4:00 - AST
494
495# Bolivia
496# Zone NAME GMTOFF RULES FORMAT [UNTIL]
497Zone America/La_Paz -4:32:36 - LMT 1890
498 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT
499 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST
500 -4:00 - BOT # Bolivia Time
501
502# Brazil
503
9ffe4b14 504# From Paul Eggert (1993-11-18):
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505# The mayor of Rio recently attempted to change the time zone rules
506# just in his city, in order to leave more summer time for the tourist trade.
507# The rule change lasted only part of the day;
508# the federal government refused to follow the city's rules, and business
509# was in a chaos, so the mayor backed down that afternoon.
510
511# From IATA SSIM (1996-02):
512# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS),
513# Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ),
514# Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO),
515# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL].
516# [The last three states are new to this issue of the IATA SSIM.]
517
518# From Gwillim Law (1996-10-07):
519# Geography, history (Tocantins was part of Goias until 1989), and other
520# sources of time zone information lead me to believe that AL, SE, and TO were
521# always in BR1, and so the only change was whether or not they observed DST....
522# The earliest issue of the SSIM I have is 2/91. Each issue from then until
523# 9/95 says that DST is observed only in the ten states I quoted from 9/95,
524# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2
525# (UTC-4).... The other two time zones given for Brazil are BR3, which is
526# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is
527# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's
528# become part of the state of Pernambuco). The boundary between BR1 and BR2
529# has never been clearly stated. They've simply been called East and West.
530# However, some conclusions can be drawn from another IATA manual: the Airline
531# Coding Directory, which lists close to 400 airports in Brazil. For each
532# airport it gives a time zone which is coded to the SSIM. From that
533# information, I'm led to conclude that the states of Amapa (AP), Ceara (CE),
534# Maranhao (MA), Paraiba (PR), Pernambuco (PE), Piaui (PI), and Rio Grande do
535# Norte (RN), and the eastern part of Para (PA) are all in BR1 without DST.
536
537# From Marcos Tadeu (1998-09-27):
538# <a href="http://pcdsh01.on.br/verao1.html">
539# Brazilian official page
540# </a>
541
542# From Jesper Norgaard (2000-11-03):
543# [For an official list of which regions in Brazil use which time zones, see:]
544# http://pcdsh01.on.br/Fusbr.htm
545# http://pcdsh01.on.br/Fusbrhv.htm
546
547# From Celso Doria via David Madeo (2002-10-09):
548# The reason for the delay this year has to do with elections in Brazil.
549#
550# Unlike in the United States, elections in Brazil are 100% computerized and
551# the results are known almost immediately. Yesterday, it was the first
552# round of the elections when 115 million Brazilians voted for President,
553# Governor, Senators, Federal Deputies, and State Deputies. Nobody is
554# counting (or re-counting) votes anymore and we know there will be a second
555# round for the Presidency and also for some Governors. The 2nd round will
556# take place on October 27th.
557#
558# The reason why the DST will only begin November 3rd is that the thousands
559# of electoral machines used cannot have their time changed, and since the
560# Constitution says the elections must begin at 8:00 AM and end at 5:00 PM,
561# the Government decided to postpone DST, instead of changing the Constitution
562# (maybe, for the next elections, it will be possible to change the clock)...
563
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564# From Rodrigo Severo (2004-10-04):
565# It's just the biannual change made necessary by the much hyped, supposedly
566# modern Brazilian eletronic voting machines which, apparently, can't deal
567# with a time change between the first and the second rounds of the elections.
568
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569# From Steffen Thorsen (2007-09-20):
570# Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00:
571# http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975
572
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573# From Paul Schulze (2008-06-24):
574# ...by law number 11.662 of April 24, 2008 (published in the "Diario
575# Oficial da Uniao"...) in Brazil there are changes in the timezones,
576# effective today (00:00am at June 24, 2008) as follows:
577#
578# a) The timezone UTC+5 is e[x]tinguished, with all the Acre state and the
579# part of the Amazonas state that had this timezone now being put to the
580# timezone UTC+4
581# b) The whole Para state now is put at timezone UTC+3, instead of just
582# part of it, as was before.
583#
584# This change follows a proposal of senator Tiao Viana of Acre state, that
585# proposed it due to concerns about open television channels displaying
586# programs inappropriate to youths in the states that had the timezone
587# UTC+5 too early in the night. In the occasion, some more corrections
588# were proposed, trying to unify the timezones of any given state. This
589# change modifies timezone rules defined in decree 2.784 of 18 June,
590# 1913.
591
592# From Rodrigo Severo (2008-06-24):
593# Just correcting the URL:
594# <a href="https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=3Ddo&secao=3D1&pagina=3D1&data=3D25/04/2008">
595# https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=3Ddo&secao=3D1&pagina=3D1&data=3D25/04/2008
596# </a>
597#
598# As a result of the above Decree I believe the America/Rio_Branco
599# timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall
600# be created to represent the the west side of the Para State. I
601# suggest this new timezone be called Santarem as the most
602# important/populated city in the affected area.
603#
604# This new timezone would be the same as the Rio_Branco timezone up to
605# the 2008/06/24 change which would be to UTC-3 instead of UTC-4.
606
607# From Alex Krivenyshev (2008-06-24):
608# This is a quick reference page for New and Old Brazil Time Zones map.
609# <a href="http://www.worldtimezone.com/brazil-time-new-old.php">
610# http://www.worldtimezone.com/brazil-time-new-old.php
611# </a>
612#
613# - 4 time zones replaced by 3 time zones-eliminating time zone UTC- 05
614# (state Acre and the part of the Amazonas will be UTC/GMT- 04) - western
615# part of Par state is moving to one timezone UTC- 03 (from UTC -04).
616
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617# From Paul Eggert (2002-10-10):
618# The official decrees referenced below are mostly taken from
619# <a href="http://pcdsh01.on.br/DecHV.html">
620# Decretos sobre o Horario de Verao no Brasil
17f48456 621# </a>.
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623# From Steffen Thorsen (2008-08-29):
624# As announced by the government and many newspapers in Brazil late
625# yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and
626# it will end on 2009-02-15 (current rule for Brazil is fine). Based on
627# past years experience with the elections, there was a good chance that
628# the start was postponed to November, but it did not happen this year.
629#
630# It has not yet been posted to http://pcdsh01.on.br/DecHV.html
631#
632# An official page about it:
633# <a href="http://www.mme.gov.br/site/news/detail.do?newsId=16722">
634# http://www.mme.gov.br/site/news/detail.do?newsId=16722
635# </a>
636# Note that this link does not always work directly, but must be accessed
637# by going to
bfd634de 638# <a href="http://www.mme.gov.br/first">
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639# http://www.mme.gov.br/first
640# </a>
641#
642# One example link that works directly:
643# <a href="http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54">
644# http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54
645# (Portuguese)
646# </a>
647#
648# We have a written a short article about it as well:
649# <a href="http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html">
650# http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html
651# </a>
652
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653# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
654# Decree <a href="http://pcdsh01.on.br/HV20466.htm">20,466</a> (1931-10-01)
655# Decree <a href="http://pcdsh01.on.br/HV21896.htm">21,896</a> (1932-01-10)
656Rule Brazil 1931 only - Oct 3 11:00 1:00 S
657Rule Brazil 1932 1933 - Apr 1 0:00 0 -
658Rule Brazil 1932 only - Oct 3 0:00 1:00 S
659# Decree <a href="http://pcdsh01.on.br/HV23195.htm">23,195</a> (1933-10-10)
660# revoked DST.
661# Decree <a href="http://pcdsh01.on.br/HV27496.htm">27,496</a> (1949-11-24)
662# Decree <a href="http://pcdsh01.on.br/HV27998.htm">27,998</a> (1950-04-13)
663Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S
664Rule Brazil 1950 only - Apr 16 1:00 0 -
665Rule Brazil 1951 1952 - Apr 1 0:00 0 -
666# Decree <a href="http://pcdsh01.on.br/HV32308.htm">32,308</a> (1953-02-24)
667Rule Brazil 1953 only - Mar 1 0:00 0 -
668# Decree <a href="http://pcdsh01.on.br/HV34724.htm">34,724</a> (1953-11-30)
669# revoked DST.
670# Decree <a href="http://pcdsh01.on.br/HV52700.htm">52,700</a> (1963-10-18)
671# established DST from 1963-10-23 00:00 to 1964-02-29 00:00
672# in SP, RJ, GB, MG, ES, due to the prolongation of the drought.
673# Decree <a href="http://pcdsh01.on.br/HV53071.htm">53,071</a> (1963-12-03)
674# extended the above decree to all of the national territory on 12-09.
675Rule Brazil 1963 only - Dec 9 0:00 1:00 S
676# Decree <a href="http://pcdsh01.on.br/HV53604.htm">53,604</a> (1964-02-25)
677# extended summer time by one day to 1964-03-01 00:00 (start of school).
678Rule Brazil 1964 only - Mar 1 0:00 0 -
679# Decree <a href="http://pcdsh01.on.br/HV55639.htm">55,639</a> (1965-01-27)
680Rule Brazil 1965 only - Jan 31 0:00 1:00 S
681Rule Brazil 1965 only - Mar 31 0:00 0 -
682# Decree <a href="http://pcdsh01.on.br/HV57303.htm">57,303</a> (1965-11-22)
683Rule Brazil 1965 only - Dec 1 0:00 1:00 S
684# Decree <a href="http://pcdsh01.on.br/HV57843.htm">57,843</a> (1966-02-18)
685Rule Brazil 1966 1968 - Mar 1 0:00 0 -
686Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S
687# Decree <a href="http://pcdsh01.on.br/HV63429.htm">63,429</a> (1968-10-15)
688# revoked DST.
689# Decree <a href="http://pcdsh01.on.br/HV91698.htm">91,698</a> (1985-09-27)
690Rule Brazil 1985 only - Nov 2 0:00 1:00 S
691# Decree 92,310 (1986-01-21)
692# Decree 92,463 (1986-03-13)
693Rule Brazil 1986 only - Mar 15 0:00 0 -
694# Decree 93,316 (1986-10-01)
695Rule Brazil 1986 only - Oct 25 0:00 1:00 S
696Rule Brazil 1987 only - Feb 14 0:00 0 -
697# Decree <a href="http://pcdsh01.on.br/HV94922.htm">94,922</a> (1987-09-22)
698Rule Brazil 1987 only - Oct 25 0:00 1:00 S
699Rule Brazil 1988 only - Feb 7 0:00 0 -
700# Decree <a href="http://pcdsh01.on.br/HV96676.htm">96,676</a> (1988-09-12)
701# except for the states of AC, AM, PA, RR, RO, and AP (then a territory)
702Rule Brazil 1988 only - Oct 16 0:00 1:00 S
703Rule Brazil 1989 only - Jan 29 0:00 0 -
704# Decree <a href="http://pcdsh01.on.br/HV98077.htm">98,077</a> (1989-08-21)
705# with the same exceptions
706Rule Brazil 1989 only - Oct 15 0:00 1:00 S
707Rule Brazil 1990 only - Feb 11 0:00 0 -
708# Decree <a href="http://pcdsh01.on.br/HV99530.htm">99,530</a> (1990-09-17)
709# adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF.
710# Decree 99,629 (1990-10-19) adds BA, MT.
711Rule Brazil 1990 only - Oct 21 0:00 1:00 S
712Rule Brazil 1991 only - Feb 17 0:00 0 -
713# <a href="http://pcdsh01.on.br/HV1991.htm">Unnumbered decree</a> (1991-09-25)
714# adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF.
715Rule Brazil 1991 only - Oct 20 0:00 1:00 S
716Rule Brazil 1992 only - Feb 9 0:00 0 -
717# <a href="http://pcdsh01.on.br/HV1992.htm">Unnumbered decree</a> (1992-10-16)
718# adopted by same states.
719Rule Brazil 1992 only - Oct 25 0:00 1:00 S
720Rule Brazil 1993 only - Jan 31 0:00 0 -
721# Decree <a href="http://pcdsh01.on.br/HV942.htm">942</a> (1993-09-28)
722# adopted by same states, plus AM.
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723# Decree <a href="http://pcdsh01.on.br/HV1252.htm">1,252</a> (1994-09-22;
724# web page corrected 2004-01-07) adopted by same states, minus AM.
984263bc 725# Decree <a href="http://pcdsh01.on.br/HV1636.htm">1,636</a> (1995-09-14)
ba5ba9da 726# adopted by same states, plus MT and TO.
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727# Decree <a href="http://pcdsh01.on.br/HV1674.htm">1,674</a> (1995-10-13)
728# adds AL, SE.
729Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S
730Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 -
731Rule Brazil 1996 only - Feb 11 0:00 0 -
732# Decree <a href="http://pcdsh01.on.br/HV2000.htm">2,000</a> (1996-09-04)
733# adopted by same states, minus AL, SE.
734Rule Brazil 1996 only - Oct 6 0:00 1:00 S
735Rule Brazil 1997 only - Feb 16 0:00 0 -
9ffe4b14 736# From Daniel C. Sobral (1998-02-12):
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737# In 1997, the DS began on October 6. The stated reason was that
738# because international television networks ignored Brazil's policy on DS,
739# they bought the wrong times on satellite for coverage of Pope's visit.
740# This year, the ending date of DS was postponed to March 1
741# to help dealing with the shortages of electric power.
742#
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743# Decree 2,317 (1997-09-04), adopted by same states.
744Rule Brazil 1997 only - Oct 6 0:00 1:00 S
745# Decree <a href="http://pcdsh01.on.br/figuras/HV2495.JPG">2,495</a>
746# (1998-02-10)
747Rule Brazil 1998 only - Mar 1 0:00 0 -
748# Decree <a href="http://pcdsh01.on.br/figuras/Hv98.jpg">2,780</a> (1998-09-11)
749# adopted by the same states as before.
750Rule Brazil 1998 only - Oct 11 0:00 1:00 S
751Rule Brazil 1999 only - Feb 21 0:00 0 -
752# Decree <a href="http://pcdsh01.on.br/figuras/HV3150.gif">3,150</a>
753# (1999-08-23) adopted by same states.
754# Decree <a href="http://pcdsh01.on.br/DecHV99.gif">3,188</a> (1999-09-30)
755# adds SE, AL, PB, PE, RN, CE, PI, MA and RR.
756Rule Brazil 1999 only - Oct 3 0:00 1:00 S
757Rule Brazil 2000 only - Feb 27 0:00 0 -
758# Decree <a href="http://pcdsh01.on.br/DEC3592.htm">3,592</a> (2000-09-06)
759# adopted by the same states as before.
760# Decree <a href="http://pcdsh01.on.br/Dec3630.jpg">3,630</a> (2000-10-13)
761# repeals DST in PE and RR, effective 2000-10-15 00:00.
762# Decree <a href="http://pcdsh01.on.br/Dec3632.jpg">3,632</a> (2000-10-17)
763# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
764# Decree <a href="http://pcdsh01.on.br/figuras/HV3916.gif">3,916</a>
765# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE.
766Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S
17f48456 767Rule Brazil 2001 2006 - Feb Sun>=15 0:00 0 -
984263bc 768# Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE.
a36b983e 769# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm">4,399</a>
984263bc 770Rule Brazil 2002 only - Nov 3 0:00 1:00 S
ba5ba9da 771# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
a36b983e 772# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm">4,844</a>
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773Rule Brazil 2003 only - Oct 19 0:00 1:00 S
774# Decree 5,223 (2004-10-01) reestablishes DST in MT.
a36b983e 775# <a href="http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm">5,223</a>
bc95ec93 776Rule Brazil 2004 only - Nov 2 0:00 1:00 S
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777# Decree <a href="http://pcdsh01.on.br/DecHV5539.gif">5,539</a> (2005-09-19),
778# adopted by the same states as before.
17f48456 779Rule Brazil 2005 only - Oct 16 0:00 1:00 S
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780# Decree <a href="http://pcdsh01.on.br/DecHV5920.gif">5,920</a> (2006-10-03),
781# adopted by the same states as before.
782Rule Brazil 2006 only - Nov 5 0:00 1:00 S
783Rule Brazil 2007 only - Feb 25 0:00 0 -
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784# Decree <a href="http://pcdsh01.on.br/DecHV6212.gif">6,212</a> (2007-09-26),
785# adopted by the same states as before.
234dfcd0 786Rule Brazil 2007 only - Oct Sun>=8 0:00 1:00 S
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787# From Frederico A. C. Neves (2008-09-10):
788# Acording to this decree
789# <a href="http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm">
790# http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm
791# </a>
792# [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the
793# 3rd Feb Sunday. There is an exception on the return date when this is
794# the Carnival Sunday then the return date will be the next Sunday...
795Rule Brazil 2008 max - Oct Sun>=15 0:00 1:00 S
796Rule Brazil 2008 2011 - Feb Sun>=15 0:00 0 -
797Rule Brazil 2012 only - Feb Sun>=22 0:00 0 -
798Rule Brazil 2013 2014 - Feb Sun>=15 0:00 0 -
799Rule Brazil 2015 only - Feb Sun>=22 0:00 0 -
800Rule Brazil 2016 2022 - Feb Sun>=15 0:00 0 -
801Rule Brazil 2023 only - Feb Sun>=22 0:00 0 -
802Rule Brazil 2024 2025 - Feb Sun>=15 0:00 0 -
803Rule Brazil 2026 only - Feb Sun>=22 0:00 0 -
804Rule Brazil 2027 2033 - Feb Sun>=15 0:00 0 -
805Rule Brazil 2034 only - Feb Sun>=22 0:00 0 -
806Rule Brazil 2035 2036 - Feb Sun>=15 0:00 0 -
807Rule Brazil 2037 only - Feb Sun>=22 0:00 0 -
808# From Arthur David Olson (2008-09-29):
809# The next is wrong in some years but is better than nothing.
810Rule Brazil 2038 max - Feb Sun>=15 0:00 0 -
811
ba5ba9da 812# The latest ruleset listed above says that the following states observe DST:
bc95ec93 813# DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP.
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815# Zone NAME GMTOFF RULES FORMAT [UNTIL]
816#
ba5ba9da 817# Fernando de Noronha (administratively part of PE)
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818Zone America/Noronha -2:09:40 - LMT 1914
819 -2:00 Brazil FN%sT 1990 Sep 17
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820 -2:00 - FNT 1999 Sep 30
821 -2:00 Brazil FN%sT 2000 Oct 15
822 -2:00 - FNT 2001 Sep 13
823 -2:00 Brazil FN%sT 2002 Oct 1
984263bc 824 -2:00 - FNT
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825# Other Atlantic islands have no permanent settlement.
826# These include Trindade and Martin Vaz (administratively part of ES),
827# Atol das Rocas (RN), and Penedos de Sao Pedro e Sao Paulo (PE).
828# Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01;
829# it also included the Penedos.
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830#
831# Amapa (AP), east Para (PA)
832# East Para includes Belem, Maraba, Serra Norte, and Sao Felix do Xingu.
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833# The division between east and west Para is the river Xingu.
834# In the north a very small part from the river Javary (now Jari I guess,
835# the border with Amapa) to the Amazon, then to the Xingu.
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836Zone America/Belem -3:13:56 - LMT 1914
837 -3:00 Brazil BR%sT 1988 Sep 12
838 -3:00 - BRT
839#
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840# west Para (PA)
841# West Para includes Altamira, Oribidos, Prainha, Oriximina, and Santarem.
842Zone America/Santarem -3:38:48 - LMT 1914
843 -4:00 Brazil AM%sT 1988 Sep 12
844 -4:00 - AMT 2008 Jun 24 00:00
845 -3:00 - BRT
846#
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847# Maranhao (MA), Piaui (PI), Ceara (CE), Rio Grande do Norte (RN),
848# Paraiba (PB)
849Zone America/Fortaleza -2:34:00 - LMT 1914
850 -3:00 Brazil BR%sT 1990 Sep 17
851 -3:00 - BRT 1999 Sep 30
852 -3:00 Brazil BR%sT 2000 Oct 22
853 -3:00 - BRT 2001 Sep 13
854 -3:00 Brazil BR%sT 2002 Oct 1
855 -3:00 - BRT
856#
857# Pernambuco (PE) (except Atlantic islands)
858Zone America/Recife -2:19:36 - LMT 1914
859 -3:00 Brazil BR%sT 1990 Sep 17
860 -3:00 - BRT 1999 Sep 30
861 -3:00 Brazil BR%sT 2000 Oct 15
862 -3:00 - BRT 2001 Sep 13
863 -3:00 Brazil BR%sT 2002 Oct 1
864 -3:00 - BRT
865#
866# Tocantins (TO)
867Zone America/Araguaina -3:12:48 - LMT 1914
868 -3:00 Brazil BR%sT 1990 Sep 17
869 -3:00 - BRT 1995 Sep 14
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870 -3:00 Brazil BR%sT 2003 Sep 24
871 -3:00 - BRT
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872#
873# Alagoas (AL), Sergipe (SE)
874Zone America/Maceio -2:22:52 - LMT 1914
875 -3:00 Brazil BR%sT 1990 Sep 17
876 -3:00 - BRT 1995 Oct 13
877 -3:00 Brazil BR%sT 1996 Sep 4
878 -3:00 - BRT 1999 Sep 30
879 -3:00 Brazil BR%sT 2000 Oct 22
880 -3:00 - BRT 2001 Sep 13
881 -3:00 Brazil BR%sT 2002 Oct 1
882 -3:00 - BRT
883#
ba5ba9da
JR
884# Bahia (BA)
885# There are too many Salvadors elsewhere, so use America/Bahia instead
886# of America/Salvador.
887Zone America/Bahia -2:34:04 - LMT 1914
888 -3:00 Brazil BR%sT 2003 Sep 24
889 -3:00 - BRT
890#
891# Goias (GO), Distrito Federal (DF), Minas Gerais (MG),
984263bc
MD
892# Espirito Santo (ES), Rio de Janeiro (RJ), Sao Paulo (SP), Parana (PR),
893# Santa Catarina (SC), Rio Grande do Sul (RS)
894Zone America/Sao_Paulo -3:06:28 - LMT 1914
895 -3:00 Brazil BR%sT 1963 Oct 23 00:00
896 -3:00 1:00 BRST 1964
897 -3:00 Brazil BR%sT
898#
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JR
899# Mato Grosso do Sul (MS)
900Zone America/Campo_Grande -3:38:28 - LMT 1914
984263bc
MD
901 -4:00 Brazil AM%sT
902#
ba5ba9da
JR
903# Mato Grosso (MT)
904Zone America/Cuiaba -3:44:20 - LMT 1914
905 -4:00 Brazil AM%sT 2003 Sep 24
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SW
906 -4:00 - AMT 2004 Oct 1
907 -4:00 Brazil AM%sT
ba5ba9da 908#
a36b983e 909# Rondonia (RO)
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MD
910Zone America/Porto_Velho -4:15:36 - LMT 1914
911 -4:00 Brazil AM%sT 1988 Sep 12
912 -4:00 - AMT
913#
914# Roraima (RR)
915Zone America/Boa_Vista -4:02:40 - LMT 1914
916 -4:00 Brazil AM%sT 1988 Sep 12
917 -4:00 - AMT 1999 Sep 30
918 -4:00 Brazil AM%sT 2000 Oct 15
919 -4:00 - AMT
920#
921# east Amazonas (AM): Boca do Acre, Jutai, Manaus, Floriano Peixoto
ba5ba9da
JR
922# The great circle line from Tabatinga to Porto Acre divides
923# east from west Amazonas.
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MD
924Zone America/Manaus -4:00:04 - LMT 1914
925 -4:00 Brazil AM%sT 1988 Sep 12
926 -4:00 - AMT 1993 Sep 28
927 -4:00 Brazil AM%sT 1994 Sep 22
928 -4:00 - AMT
929#
930# west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant,
931# Eirunepe, Envira, Ipixuna
932Zone America/Eirunepe -4:39:28 - LMT 1914
933 -5:00 Brazil AC%sT 1988 Sep 12
934 -5:00 - ACT 1993 Sep 28
935 -5:00 Brazil AC%sT 1994 Sep 22
a36b983e
SW
936 -5:00 - ACT 2008 Jun 24 00:00
937 -4:00 - AMT
984263bc
MD
938#
939# Acre (AC)
940Zone America/Rio_Branco -4:31:12 - LMT 1914
941 -5:00 Brazil AC%sT 1988 Sep 12
a36b983e
SW
942 -5:00 - ACT 2008 Jun 24 00:00
943 -4:00 - AMT
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MD
944
945# Chile
946
947# From Eduardo Krell (1995-10-19):
948# The law says to switch to DST at midnight [24:00] on the second SATURDAY
949# of October.... The law is the same for March and October.
950# (1998-09-29):
951# Because of the drought this year, the government decided to go into
952# DST earlier (saturday 9/26 at 24:00). This is a one-time change only ...
953# (unless there's another dry season next year, I guess).
954
955# From Julio I. Pacheco Troncoso (1999-03-18):
956# Because of the same drought, the government decided to end DST later,
957# on April 3, (one-time change).
958
ff8424c5
SW
959# From Oscar van Vlijmen (2006-10-08):
960# http://www.horaoficial.cl/cambio.htm
984263bc 961
ff8424c5
SW
962# From Jesper Norgaard Welen (2006-10-08):
963# I think that there are some obvious mistakes in the suggested link
964# from Oscar van Vlijmen,... for instance entry 66 says that GMT-4
965# ended 1990-09-12 while entry 67 only begins GMT-3 at 1990-09-15
966# (they should have been 1990-09-15 and 1990-09-16 respectively), but
967# anyhow it clears up some doubts too.
984263bc 968
880368e2
SW
969# From Paul Eggert (2006-12-27):
970# The following data for Chile and America/Santiago are from
971# <http://www.horaoficial.cl/horaof.htm> (2006-09-20), transcribed by
972# Jesper Norgaard Welen. The data for Pacific/Easter are from Shanks
973# & Pottenger, except with DST transitions after 1932 cloned from
974# America/Santiago. The pre-1980 Pacific/Easter data are dubious,
975# but we have no other source.
984263bc 976
a6282357
SW
977# From German Poo-Caaman~o (2008-03-03):
978# Due to drought, Chile extends Daylight Time in three weeks. This
979# is one-time change (Saturday 3/29 at 24:00 for America/Santiago
980# and Saturday 3/29 at 22:00 for Pacific/Easter)
981# The Supreme Decree is located at
982# <a href="http://www.shoa.cl/servicios/supremo316.pdf">
983# http://www.shoa.cl/servicios/supremo316.pdf
984# </a>
985# and the instructions for 2008 are located in:
986# <a href="http://www.horaoficial.cl/cambio.htm">
987# http://www.horaoficial.cl/cambio.htm
988# </a>.
989
a36b983e 990# From Jose Miguel Garrido (2008-03-05):
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SW
991# ...
992# You could see the announces of the change on
993# <a href="http://www.shoa.cl/noticias/2008/04hora/hora.htm">
994# http://www.shoa.cl/noticias/2008/04hora/hora.htm
995# </a>.
996
984263bc 997# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
ff8424c5 998Rule Chile 1927 1932 - Sep 1 0:00 1:00 S
984263bc 999Rule Chile 1928 1932 - Apr 1 0:00 0 -
ff8424c5
SW
1000Rule Chile 1942 only - Jun 1 4:00u 0 -
1001Rule Chile 1942 only - Aug 1 5:00u 1:00 S
1002Rule Chile 1946 only - Jul 15 4:00u 1:00 S
1003Rule Chile 1946 only - Sep 1 3:00u 0:00 -
1004Rule Chile 1947 only - Apr 1 4:00u 0 -
1005Rule Chile 1968 only - Nov 3 4:00u 1:00 S
1006Rule Chile 1969 only - Mar 30 3:00u 0 -
1007Rule Chile 1969 only - Nov 23 4:00u 1:00 S
1008Rule Chile 1970 only - Mar 29 3:00u 0 -
1009Rule Chile 1971 only - Mar 14 3:00u 0 -
1010Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S
1011Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 -
1012Rule Chile 1973 only - Sep 30 4:00u 1:00 S
1013Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S
1014Rule Chile 1987 only - Apr 12 3:00u 0 -
1015Rule Chile 1988 1989 - Mar Sun>=9 3:00u 0 -
1016Rule Chile 1988 only - Oct Sun>=1 4:00u 1:00 S
1017Rule Chile 1989 only - Oct Sun>=9 4:00u 1:00 S
1018Rule Chile 1990 only - Mar 18 3:00u 0 -
1019Rule Chile 1990 only - Sep 16 4:00u 1:00 S
1020Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 -
1021Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S
1022Rule Chile 1997 only - Mar 30 3:00u 0 -
1023Rule Chile 1998 only - Mar Sun>=9 3:00u 0 -
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MD
1024Rule Chile 1998 only - Sep 27 4:00u 1:00 S
1025Rule Chile 1999 only - Apr 4 3:00u 0 -
1026Rule Chile 1999 max - Oct Sun>=9 4:00u 1:00 S
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SW
1027Rule Chile 2000 2007 - Mar Sun>=9 3:00u 0 -
1028# N.B.: the end of March 29 in Chile is March 30 in Universal time,
1029# which is used below in specifying the transition.
1030Rule Chile 2008 only - Mar 30 3:00u 0 -
1031Rule Chile 2009 max - Mar Sun>=9 3:00u 0 -
ff8424c5 1032# IATA SSIM anomalies: (1992-02) says 1992-03-14;
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MD
1033# (1996-09) says 1998-03-08. Ignore these.
1034# Zone NAME GMTOFF RULES FORMAT [UNTIL]
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SW
1035Zone America/Santiago -4:42:46 - LMT 1890
1036 -4:42:46 - SMT 1910 # Santiago Mean Time
1037 -5:00 - CLT 1916 Jul 1 # Chile Time
1038 -4:42:46 - SMT 1918 Sep 1 # Santiago Mean Time
1039 -4:00 - CLT 1919 Jul 1 # Chile Time
1040 -4:42:46 - SMT 1927 Sep 1 # Santiago Mean Time
1041 -5:00 Chile CL%sT 1947 May 22 # Chile Time
984263bc 1042 -4:00 Chile CL%sT
880368e2 1043Zone Pacific/Easter -7:17:44 - LMT 1890
70fc4940 1044 -7:17:28 - EMT 1932 Sep # Easter Mean Time
880368e2 1045 -7:00 Chile EAS%sT 1982 Mar 13 21:00 # Easter I Time
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MD
1046 -6:00 Chile EAS%sT
1047#
1048# Sala y Gomez Island is like Pacific/Easter.
1049# Other Chilean locations, including Juan Fernandez Is, San Ambrosio,
1050# San Felix, and Antarctic bases, are like America/Santiago.
1051
1052# Colombia
984263bc 1053# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
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SW
1054Rule CO 1992 only - May 3 0:00 1:00 S
1055Rule CO 1993 only - Apr 4 0:00 0 -
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MD
1056# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1057Zone America/Bogota -4:56:20 - LMT 1884 Mar 13
1058 -4:56:20 - BMT 1914 Nov 23 # Bogota Mean Time
1059 -5:00 CO CO%sT # Colombia Time
1060# Malpelo, Providencia, San Andres
1061# no information; probably like America/Bogota
1062
1063# Curacao
bd7414aa 1064#
8393cd87 1065# From Paul Eggert (2006-03-22):
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SW
1066# Shanks & Pottenger say that The Bottom and Philipsburg have been at
1067# -4:00 since standard time was introduced on 1912-03-02; and that
1068# Kralendijk and Rincon used Kralendijk Mean Time (-4:33:08) from
1069# 1912-02-02 to 1965-01-01. The former is dubious, since S&P also say
1070# Saba Island has been like Curacao.
8393cd87 1071# This all predates our 1970 cutoff, though.
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SW
1072#
1073# By July 2007 Curacao and St Maarten are planned to become
1074# associated states within the Netherlands, much like Aruba;
1075# Bonaire, Saba and St Eustatius would become directly part of the
1076# Netherlands as Kingdom Islands. This won't affect their time zones
1077# though, as far as we know.
8393cd87 1078#
984263bc
MD
1079# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1080Zone America/Curacao -4:35:44 - LMT 1912 Feb 12 # Willemstad
1081 -4:30 - ANT 1965 # Netherlands Antilles Time
1082 -4:00 - AST
1083
1084# Ecuador
8393cd87
SW
1085#
1086# From Paul Eggert (2007-03-04):
1087# Apparently Ecuador had a failed experiment with DST in 1992.
1088# <http://midena.gov.ec/content/view/1261/208/> (2007-02-27) and
1089# <http://www.hoy.com.ec/NoticiaNue.asp?row_id=249856> (2006-11-06) both
1090# talk about "hora Sixto". Leave this alone for now, as we have no data.
1091#
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MD
1092# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1093Zone America/Guayaquil -5:19:20 - LMT 1890
1094 -5:14:00 - QMT 1931 # Quito Mean Time
1095 -5:00 - ECT # Ecuador Time
1096Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno
1097 -5:00 - ECT 1986
1098 -6:00 - GALT # Galapagos Time
1099
1100# Falklands
1101
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SW
1102# From Paul Eggert (2006-03-22):
1103# Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except
1104# the IATA gives 1996-09-08. Go with Shanks & Pottenger.
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MD
1105
1106# From Falkland Islands Government Office, London (2001-01-22)
1107# via Jesper Norgaard:
1108# ... the clocks revert back to Local Mean Time at 2 am on Sunday 15
1109# April 2001 and advance one hour to summer time at 2 am on Sunday 2
1110# September. It is anticipated that the clocks will revert back at 2
1111# am on Sunday 21 April 2002 and advance to summer time at 2 am on
1112# Sunday 1 September.
1113
1114# From Rives McDow (2001-02-13):
1115#
1116# I have communicated several times with people there, and the last
1117# time I had communications that was helpful was in 1998. Here is
1118# what was said then:
1119#
1120# "The general rule was that Stanley used daylight saving and the Camp
1121# did not. However for various reasons many people in the Camp have
1122# started to use daylight saving (known locally as 'Stanley Time')
1123# There is no rule as to who uses daylight saving - it is a matter of
1124# personal choice and so it is impossible to draw a map showing who
1125# uses it and who does not. Any list would be out of date as soon as
1126# it was produced. This year daylight saving ended on April 18/19th
1127# and started again on September 12/13th. I do not know what the rule
1128# is, but can find out if you like. We do not change at the same time
1129# as UK or Chile."
1130#
1131# I did have in my notes that the rule was "Second Saturday in Sep at
1132# 0:00 until third Saturday in Apr at 0:00". I think that this does
1133# not agree in some cases with Shanks; is this true?
1134#
1135# Also, there is no mention in the list that some areas in the
1136# Falklands do not use DST. I have found in my communications there
1137# that these areas are on the western half of East Falkland and all of
1138# West Falkland. Stanley is the only place that consistently observes
1139# DST. Again, as in other places in the world, the farmers don't like
1140# it. West Falkland is almost entirely sheep farmers.
1141#
1142# I know one lady there that keeps a list of which farm keeps DST and
1143# which doesn't each year. She runs a shop in Stanley, and says that
1144# the list changes each year. She uses it to communicate to her
1145# customers, catching them when they are home for lunch or dinner.
1146
1147# From Paul Eggert (2001-03-05):
1148# For now, we'll just record the time in Stanley, since we have no
1149# better info.
1150
1151# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1152Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S
1153Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 -
1154Rule Falk 1939 only - Oct 1 0:00 1:00 S
1155Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S
1156Rule Falk 1943 only - Jan 1 0:00 0 -
1157Rule Falk 1983 only - Sep lastSun 0:00 1:00 S
1158Rule Falk 1984 1985 - Apr lastSun 0:00 0 -
1159Rule Falk 1984 only - Sep 16 0:00 1:00 S
1160Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S
1161Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 -
1162Rule Falk 2001 max - Apr Sun>=15 2:00 0 -
1163Rule Falk 2001 max - Sep Sun>=1 2:00 1:00 S
1164# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1165Zone Atlantic/Stanley -3:51:24 - LMT 1890
1166 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time
1167 -4:00 Falk FK%sT 1983 May # Falkland Is Time
1168 -3:00 Falk FK%sT 1985 Sep 15
1169 -4:00 Falk FK%sT
1170
1171# French Guiana
1172# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1173Zone America/Cayenne -3:29:20 - LMT 1911 Jul
1174 -4:00 - GFT 1967 Oct # French Guiana Time
1175 -3:00 - GFT
1176
1177# Guyana
1178# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1179Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown
1180 -3:45 - GBGT 1966 May 26 # Br Guiana Time
1181 -3:45 - GYT 1975 Jul 31 # Guyana Time
1182 -3:00 - GYT 1991
1183# IATA SSIM (1996-06) says -4:00. Assume a 1991 switch.
1184 -4:00 - GYT
1185
1186# Paraguay
bd7414aa
SW
1187# From Paul Eggert (2006-03-22):
1188# Shanks & Pottenger say that spring transitions are from 01:00 -> 02:00,
1189# and autumn transitions are from 00:00 -> 23:00. Go with pre-1999
984263bc
MD
1190# editions of Shanks, and with the IATA, who say transitions occur at 00:00.
1191# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1192Rule Para 1975 1988 - Oct 1 0:00 1:00 S
1193Rule Para 1975 1978 - Mar 1 0:00 0 -
1194Rule Para 1979 1991 - Apr 1 0:00 0 -
1195Rule Para 1989 only - Oct 22 0:00 1:00 S
1196Rule Para 1990 only - Oct 1 0:00 1:00 S
1197Rule Para 1991 only - Oct 6 0:00 1:00 S
1198Rule Para 1992 only - Mar 1 0:00 0 -
1199Rule Para 1992 only - Oct 5 0:00 1:00 S
1200Rule Para 1993 only - Mar 31 0:00 0 -
1201Rule Para 1993 1995 - Oct 1 0:00 1:00 S
1202Rule Para 1994 1995 - Feb lastSun 0:00 0 -
1203Rule Para 1996 only - Mar 1 0:00 0 -
1204# IATA SSIM (2000-02) says 1999-10-10; ignore this for now.
1205# From Steffen Thorsen (2000-10-02):
1206# I have three independent reports that Paraguay changed to DST this Sunday
1207# (10-01).
1208#
1209# Translated by Gwillim Law (2001-02-27) from
1210# <a href="http://www.diarionoticias.com.py/011000/nacional/naciona1.htm">
1211# Noticias, a daily paper in Asuncion, Paraguay (2000-10-01)
1212# </a>:
1213# Starting at 0:00 today, the clock will be set forward 60 minutes, in
1214# fulfillment of Decree No. 7,273 of the Executive Power.... The time change
1215# system has been operating for several years. Formerly there was a separate
1216# decree each year; the new law has the same effect, but permanently. Every
1217# year, the time will change on the first Sunday of October; likewise, the
1218# clock will be set back on the first Sunday of March.
1219#
984263bc 1220Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S
bd7414aa 1221# IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger.
984263bc 1222Rule Para 1997 only - Feb lastSun 0:00 0 -
bd7414aa 1223# Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but
984263bc
MD
1224# (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27).
1225Rule Para 1998 2001 - Mar Sun>=1 0:00 0 -
1226# From Rives McDow (2002-02-28):
1227# A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the
1228# dst method to be from the first Sunday in September to the first Sunday in
1229# April.
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SW
1230Rule Para 2002 2004 - Apr Sun>=1 0:00 0 -
1231Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S
1232#
1233# From Jesper Norgaard Welen (2005-01-02):
1234# There are several sources that claim that Paraguay made
1235# a timezone rule change in autumn 2004.
1236# From Steffen Thorsen (2005-01-05):
ff8424c5
SW
1237# Decree 1,867 (2004-03-05)
1238# From Carlos Raul Perasso via Jesper Norgaard Welen (2006-10-13)
1239# <http://www.presidencia.gov.py/decretos/D1867.pdf>
bc95ec93
SW
1240Rule Para 2004 max - Oct Sun>=15 0:00 1:00 S
1241Rule Para 2005 max - Mar Sun>=8 0:00 0 -
984263bc
MD
1242
1243# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1244Zone America/Asuncion -3:50:40 - LMT 1890
1245 -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time
1246 -4:00 - PYT 1972 Oct # Paraguay Time
1247 -3:00 - PYT 1974 Apr
1248 -4:00 Para PY%sT
1249
1250# Peru
ba5ba9da
JR
1251#
1252# <a href="news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net">
1253# From Evelyn C. Leeper via Mark Brader (2003-10-26):</a>
bc95ec93 1254# When we were in Peru in 1985-1986, they apparently switched over
ba5ba9da
JR
1255# sometime between December 29 and January 3 while we were on the Amazon.
1256#
bd7414aa
SW
1257# From Paul Eggert (2006-03-22):
1258# Shanks & Pottenger don't have this transition. Assume 1986 was like 1987.
ba5ba9da 1259
984263bc
MD
1260# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1261Rule Peru 1938 only - Jan 1 0:00 1:00 S
1262Rule Peru 1938 only - Apr 1 0:00 0 -
1263Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S
1264Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 -
ba5ba9da
JR
1265Rule Peru 1986 1987 - Jan 1 0:00 1:00 S
1266Rule Peru 1986 1987 - Apr 1 0:00 0 -
984263bc
MD
1267Rule Peru 1990 only - Jan 1 0:00 1:00 S
1268Rule Peru 1990 only - Apr 1 0:00 0 -
bd7414aa 1269# IATA is ambiguous for 1993/1995; go with Shanks & Pottenger.
984263bc
MD
1270Rule Peru 1994 only - Jan 1 0:00 1:00 S
1271Rule Peru 1994 only - Apr 1 0:00 0 -
1272# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1273Zone America/Lima -5:08:12 - LMT 1890
1274 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time?
1275 -5:00 Peru PE%sT # Peru Time
1276
1277# South Georgia
1278# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1279Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken
1280 -2:00 - GST # South Georgia Time
1281
1282# South Sandwich Is
1283# uninhabited; scientific personnel have wintered
1284
1285# Suriname
1286# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1287Zone America/Paramaribo -3:40:40 - LMT 1911
1288 -3:40:52 - PMT 1935 # Paramaribo Mean Time
1289 -3:40:36 - PMT 1945 Oct # The capital moved?
1290 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time
1291 -3:30 - SRT 1984 Oct # Suriname Time
1292 -3:00 - SRT
1293
1294# Trinidad and Tobago
1295# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1296Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2
1297 -4:00 - AST
1298
1299# Uruguay
9ffe4b14 1300# From Paul Eggert (1993-11-18):
984263bc 1301# Uruguay wins the prize for the strangest peacetime manipulation of the rules.
bd7414aa 1302# From Shanks & Pottenger:
984263bc 1303# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
bd7414aa 1304# Whitman gives 1923 Oct 1; go with Shanks & Pottenger.
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MD
1305Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS
1306Rule Uruguay 1924 1926 - Apr 1 0:00 0 -
1307Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS
1308Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS
bd7414aa 1309# Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman.
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MD
1310Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 -
1311Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS
1312Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 -
bd7414aa 1313# Whitman gives 1937 Oct 3; go with Shanks & Pottenger.
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MD
1314Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS
1315# Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13,
bd7414aa
SW
1316# and 1943 Apr 13 ``to present time''; go with Shanks & Pottenger.
1317Rule Uruguay 1941 only - Aug 1 0:00 0:30 HS
1318Rule Uruguay 1942 only - Jan 1 0:00 0 -
984263bc
MD
1319Rule Uruguay 1942 only - Dec 14 0:00 1:00 S
1320Rule Uruguay 1943 only - Mar 14 0:00 0 -
1321Rule Uruguay 1959 only - May 24 0:00 1:00 S
1322Rule Uruguay 1959 only - Nov 15 0:00 0 -
1323Rule Uruguay 1960 only - Jan 17 0:00 1:00 S
1324Rule Uruguay 1960 only - Mar 6 0:00 0 -
1325Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S
1326Rule Uruguay 1965 only - Sep 26 0:00 0 -
1327Rule Uruguay 1966 1967 - Oct 31 0:00 0 -
1328Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS
1329Rule Uruguay 1968 1970 - Dec 2 0:00 0 -
1330Rule Uruguay 1972 only - Apr 24 0:00 1:00 S
1331Rule Uruguay 1972 only - Aug 15 0:00 0 -
1332Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS
1333Rule Uruguay 1974 only - Dec 22 0:00 1:00 S
1334Rule Uruguay 1976 only - Oct 1 0:00 0 -
1335Rule Uruguay 1977 only - Dec 4 0:00 1:00 S
1336Rule Uruguay 1978 only - Apr 1 0:00 0 -
1337Rule Uruguay 1979 only - Oct 1 0:00 1:00 S
1338Rule Uruguay 1980 only - May 1 0:00 0 -
1339Rule Uruguay 1987 only - Dec 14 0:00 1:00 S
1340Rule Uruguay 1988 only - Mar 14 0:00 0 -
1341Rule Uruguay 1988 only - Dec 11 0:00 1:00 S
1342Rule Uruguay 1989 only - Mar 12 0:00 0 -
1343Rule Uruguay 1989 only - Oct 29 0:00 1:00 S
bd7414aa 1344# Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2,
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MD
1345# and that 1992/3's DST was from 10-25 to 03-01. Go with IATA.
1346Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 -
1347Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S
1348Rule Uruguay 1992 only - Oct 18 0:00 1:00 S
1349Rule Uruguay 1993 only - Feb 28 0:00 0 -
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SW
1350# From Eduardo Cota (2004-09-20):
1351# The uruguayan government has decreed a change in the local time....
1352# http://www.presidencia.gub.uy/decretos/2004091502.htm
1353Rule Uruguay 2004 only - Sep 19 0:00 1:00 S
1354# From Steffen Thorsen (2005-03-11):
1355# Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to
1356# save energy ... it was postponed two weeks....
1357# http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm
1358Rule Uruguay 2005 only - Mar 27 2:00 0 -
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SW
1359# From Eduardo Cota (2005-09-27):
1360# http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF
1361# This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at
1362# 02:00 local time, official time in Uruguay will be at GMT -2.
1363Rule Uruguay 2005 only - Oct 9 2:00 1:00 S
1364Rule Uruguay 2006 only - Mar 12 2:00 0 -
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SW
1365# From Jesper Norgaard Welen (2006-09-06):
1366# http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF
1367Rule Uruguay 2006 max - Oct Sun>=1 2:00 1:00 S
1368Rule Uruguay 2007 max - Mar Sun>=8 2:00 0 -
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1369# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1370Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28
1371 -3:44:44 - MMT 1920 May 1 # Montevideo MT
1372 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time
1373 -3:00 Uruguay UY%sT
1374
1375# Venezuela
bbe9957d 1376#
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SW
1377# From John Stainforth (2007-11-28):
1378# ... the change for Venezuela originally expected for 2007-12-31 has
1379# been brought forward to 2007-12-09. The official announcement was
1380# published today in the "Gaceta Oficial de la Republica Bolivariana
1381# de Venezuela, numero 38.819" (official document for all laws or
1382# resolution publication)
1383# http://www.globovision.com/news.php?nid=72208
bbe9957d 1384
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1385# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1386Zone America/Caracas -4:27:44 - LMT 1890
1387 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time?
1388 -4:30 - VET 1965 # Venezuela Time
9d5f55b0 1389 -4:00 - VET 2007 Dec 9 03:00
bbe9957d 1390 -4:30 - VET