| blob | e882637a5f9ee4c225b6f2dae6e208edf0a1da24 |
1 # @(#)southamerica 8.33
2 # <pre>
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).
8 # From Paul Eggert (2006-03-22):
9 # A good source for time zone historical data outside the U.S. is
10 # Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
11 # San Diego: ACS Publications, Inc. (2003).
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 #
19 # Except where otherwise noted, Shanks & Pottenger is the source for
20 # entries through 1990, and IATA SSIM is the source for entries afterwards.
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
49 ###############################################################################
51 ###############################################################################
53 # Argentina
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.
59 # From U. S. Naval Observatory (1988-01-199):
60 # ARGENTINA 3 H BEHIND UTC
62 # From Hernan G. Otero (1995-06-26):
63 # I am sending modifications to the Argentine time zone table...
64 # AR was chosen because they are the ISO letters that represent Argentina.
66 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
67 Rule Arg 1930 only - Dec 1 0:00 1:00 S
68 Rule Arg 1931 only - Apr 1 0:00 0 -
69 Rule Arg 1931 only - Oct 15 0:00 1:00 S
70 Rule Arg 1932 1940 - Mar 1 0:00 0 -
71 Rule Arg 1932 1939 - Nov 1 0:00 1:00 S
72 Rule Arg 1940 only - Jul 1 0:00 1:00 S
73 Rule Arg 1941 only - Jun 15 0:00 0 -
74 Rule Arg 1941 only - Oct 15 0:00 1:00 S
75 Rule Arg 1943 only - Aug 1 0:00 0 -
76 Rule Arg 1943 only - Oct 15 0:00 1:00 S
77 Rule Arg 1946 only - Mar 1 0:00 0 -
78 Rule Arg 1946 only - Oct 1 0:00 1:00 S
79 Rule Arg 1963 only - Oct 1 0:00 0 -
80 Rule Arg 1963 only - Dec 15 0:00 1:00 S
81 Rule Arg 1964 1966 - Mar 1 0:00 0 -
82 Rule Arg 1964 1966 - Oct 15 0:00 1:00 S
83 Rule Arg 1967 only - Apr 2 0:00 0 -
84 Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S
85 Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 -
86 Rule Arg 1974 only - Jan 23 0:00 1:00 S
87 Rule Arg 1974 only - May 1 0:00 0 -
88 Rule Arg 1988 only - Dec 1 0:00 1:00 S
89 #
90 # From Hernan G. Otero (1995-06-26):
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)
95 Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 -
96 Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S
97 #
98 # From Hernan G. Otero (1995-06-26):
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.
107 Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S
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.
112 Rule Arg 2000 only - Mar 3 0:00 0 -
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 #
119 # From Fabian L. Arce Jofre (2000-04-04):
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 #
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.
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>
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.
196 # From Mariano Absatz (2008-10-20):
197 # Decree 1693/2008 applies Law 26.350 for the summer 2008/2009 establishing DST in Argentina
198 # From 2008-10-19 until 2009-03-15
199 # <a href="http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01">
200 # http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01
201 # </a>
202 #
203 # Decree 1705/2008 excepting 12 Provinces from applying DST in the summer 2008/2009:
204 # Catamarca, La Rioja, Mendoza, Salta, San Juan, San Luis, La Pampa, Neuquen, Rio Negro, Chubut, Santa Cruz
205 # and Tierra del Fuego
206 # <a href="http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01">
207 # http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01
208 # </a>
209 #
210 # Press release 235 dated Saturday October 18th, from the Government of the Province of Jujuy saying
211 # it will not apply DST either (even when it was not included in Decree 1705/2008)
212 # <a href="http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc">
213 # http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc
214 # </a>
216 Rule Arg 2007 only - Dec 30 0:00 1:00 S
217 Rule Arg 2008 max - Mar Sun>=15 0:00 0 -
218 Rule Arg 2008 max - Oct Sun>=15 0:00 1:00 S
220 # From Mariano Absatz (2004-05-21):
221 # Today it was officially published that the Province of Mendoza is changing
222 # its timezone this winter... starting tomorrow night....
223 # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf
224 # From Paul Eggert (2004-05-24):
225 # It's Law No. 7,210. This change is due to a public power emergency, so for
226 # now we'll assume it's for this year only.
227 #
228 # From Paul Eggert (2006-03-22):
229 # <a href="http://www.spicasc.net/horvera.html">
230 # Hora de verano para la Republica Argentina (2003-06-08)
231 # </a> says that standard time in Argentina from 1894-10-31
232 # to 1920-05-01 was -4:16:48.25. Go with this more-precise value
233 # over Shanks & Pottenger.
234 #
235 # From Mariano Absatz (2004-06-05):
236 # These media articles from a major newspaper mostly cover the current state:
237 # http://www.lanacion.com.ar/04/05/27/de_604825.asp
238 # http://www.lanacion.com.ar/04/05/28/de_605203.asp
239 #
240 # The following eight (8) provinces pulled clocks back to UTC-04:00 at
241 # midnight Monday May 31st. (that is, the night between 05/31 and 06/01).
242 # Apparently, all nine provinces would go back to UTC-03:00 at the same
243 # time in October 17th.
244 #
245 # Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz,
246 # Tierra del Fuego, Tucuman.
247 #
248 # From Mariano Absatz (2004-06-14):
249 # ... this weekend, the Province of Tucuman decided it'd go back to UTC-03:00
250 # yesterday midnight (that is, at 24:00 Saturday 12th), since the people's
251 # annoyance with the change is much higher than the power savings obtained....
252 #
253 # From Gwillim Law (2004-06-14):
254 # http://www.lanacion.com.ar/04/06/10/de_609078.asp ...
255 # "The time change in Tierra del Fuego was a conflicted decision from
256 # the start. The government had decreed that the measure would take
257 # effect on June 1, but a normative error forced the new time to begin
258 # three days earlier, from a Saturday to a Sunday....
259 # Our understanding was that the change was originally scheduled to take place
260 # on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other
261 # provinces). Sunday was May 30, only two days earlier. So the article
262 # contains a contradiction. I would give more credence to the Saturday/Sunday
263 # date than the "three days earlier" phrase, and conclude that Tierra del
264 # Fuego set its clocks back at 2004-05-30 00:00.
265 #
266 # From Steffen Thorsen (2004-10-05):
267 # The previous law 7210 which changed the province of Mendoza's time zone
268 # back in May have been modified slightly in a new law 7277, which set the
269 # new end date to 2004-09-26 (original date was 2004-10-17).
270 # http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf
271 #
272 # From Mariano Absatz (2004-10-05):
273 # San Juan changed from UTC-03:00 to UTC-04:00 at midnight between
274 # Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00
275 # at midnight between Saturday, July 24th and Sunday, July 25th....
276 # http://www.sanjuan.gov.ar/prensa/archivo/000329.html
277 # http://www.sanjuan.gov.ar/prensa/archivo/000426.html
278 # http://www.sanjuan.gov.ar/prensa/archivo/000441.html
280 # From Alex Krivenyshev (2008-01-17):
281 # Here are articles that Argentina Province San Luis is planning to end DST
282 # as earlier as upcoming Monday January 21, 2008 or February 2008:
283 #
284 # Provincia argentina retrasa reloj y marca diferencia con resto del pais
285 # (Argentine Province delayed clock and mark difference with the rest of the
286 # country)
287 # <a href="http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel">
288 # http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel
289 # </a>
290 #
291 # Es inminente que en San Luis atrasen una hora los relojes
292 # (It is imminent in San Luis clocks one hour delay)
293 # <a href="http://www.lagaceta.com.ar/vernotae.asp?id_nota=253414">
294 # http://www.lagaceta.com.ar/vernotae.asp?id_nota=253414
295 # </a>
296 #
297 # <a href="http://www.worldtimezone.net/dst_news/dst_news_argentina02.html">
298 # http://www.worldtimezone.net/dst_news/dst_news_argentina02.html
299 # </a>
301 # From Jesper Norgaard Welen (2008-01-18):
302 # The page of the San Luis provincial government
303 # <a href="http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812">
304 # http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812
305 # </a>
306 # confirms what Alex Krivenyshev has earlier sent to the tz
307 # emailing list about that San Luis plans to return to standard
308 # time much earlier than the rest of the country. It also
309 # confirms that upon request the provinces San Juan and Mendoza
310 # refused to follow San Luis in this change.
311 #
312 # The change is supposed to take place Monday the 21.st at 0:00
313 # hours. As far as I understand it if this goes ahead, we need
314 # a new timezone for San Luis (although there are also documented
315 # independent changes in the southamerica file of San Luis in
316 # 1990 and 1991 which has not been confirmed).
318 # From Jesper Norgaard Welen (2008-01-25):
319 # Unfortunately the below page has become defunct, about the San Luis
320 # time change. Perhaps because it now is part of a group of pages "Most
321 # important pages of 2008."
322 #
323 # You can use
324 # <a href="http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834">
325 # http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834
326 # </a>
327 # instead it seems. Or use "Buscador" from the main page of the San Luis
328 # government, and fill in "huso" and click OK, and you will get 3 pages
329 # from which the first one is identical to the above.
331 # From Mariano Absatz (2008-01-28):
332 # I can confirm that the Province of San Luis (and so far only that
333 # province) decided to go back to UTC-3 effective midnight Jan 20th 2008
334 # (that is, Monday 21st at 0:00 is the time the clocks were delayed back
335 # 1 hour), and they intend to keep UTC-3 as their timezone all year round
336 # (that is, unless they change their mind any minute now).
337 #
338 # So we'll have to add yet another city to 'southamerica' (I think San
339 # Luis city is the mos populated city in the Province, so it'd be
340 # America/Argentina/San_Luis... of course I can't remember if San Luis's
341 # history of particular changes goes along with Mendoza or San Juan :-(
342 # (I only remember not being able to collect hard facts about San Luis
343 # back in 2004, when these provinces changed to UTC-4 for a few days, I
344 # mailed them personally and never got an answer).
346 # From Paul Eggert (2008-06-30):
347 # Unless otherwise specified, data are from Shanks & Pottenger through 1992,
348 # from the IATA otherwise. As noted below, Shanks & Pottenger say that
349 # America/Cordoba split into 6 subregions during 1991/1992, one of which
350 # was America/San_Luis, but we haven't verified this yet so for now we'll
351 # keep America/Cordoba a single region rather than splitting it into the
352 # other 5 subregions.
354 #
355 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
356 #
357 # Buenos Aires (BA), Capital Federal (CF),
358 Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31
359 -4:16:48 - CMT 1920 May # Cordoba Mean Time
360 -4:00 - ART 1930 Dec
361 -4:00 Arg AR%sT 1969 Oct 5
362 -3:00 Arg AR%sT 1999 Oct 3
363 -4:00 Arg AR%sT 2000 Mar 3
364 -3:00 Arg AR%sT
365 #
366 # Cordoba (CB), Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN),
367 # Chaco (CC), Formosa (FM), Santiago del Estero (SE)
368 #
369 # Shanks & Pottenger also make the following claims, which we haven't verified:
370 # - Formosa switched to -3:00 on 1991-01-07.
371 # - Misiones switched to -3:00 on 1990-12-29.
372 # - Chaco switched to -3:00 on 1991-01-04.
373 # - Santiago del Estero switched to -4:00 on 1991-04-01,
374 # then to -3:00 on 1991-04-26.
375 #
376 Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31
377 -4:16:48 - CMT 1920 May
378 -4:00 - ART 1930 Dec
379 -4:00 Arg AR%sT 1969 Oct 5
380 -3:00 Arg AR%sT 1991 Mar 3
381 -4:00 - WART 1991 Oct 20
382 -3:00 Arg AR%sT 1999 Oct 3
383 -4:00 Arg AR%sT 2000 Mar 3
384 -3:00 Arg AR%sT
385 #
386 # Salta (SA), La Pampa (LP), Neuquen (NQ), Rio Negro (RN)
387 Zone America/Argentina/Salta -4:21:40 - LMT 1894 Oct 31
388 -4:16:48 - CMT 1920 May
389 -4:00 - ART 1930 Dec
390 -4:00 Arg AR%sT 1969 Oct 5
391 -3:00 Arg AR%sT 1991 Mar 3
392 -4:00 - WART 1991 Oct 20
393 -3:00 Arg AR%sT 1999 Oct 3
394 -4:00 Arg AR%sT 2000 Mar 3
395 -3:00 Arg AR%sT 2008 Oct 18
396 -3:00 - ART
397 #
398 # Tucuman (TM)
399 Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31
400 -4:16:48 - CMT 1920 May
401 -4:00 - ART 1930 Dec
402 -4:00 Arg AR%sT 1969 Oct 5
403 -3:00 Arg AR%sT 1991 Mar 3
404 -4:00 - WART 1991 Oct 20
405 -3:00 Arg AR%sT 1999 Oct 3
406 -4:00 Arg AR%sT 2000 Mar 3
407 -3:00 - ART 2004 Jun 1
408 -4:00 - WART 2004 Jun 13
409 -3:00 Arg AR%sT
410 #
411 # La Rioja (LR)
412 Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31
413 -4:16:48 - CMT 1920 May
414 -4:00 - ART 1930 Dec
415 -4:00 Arg AR%sT 1969 Oct 5
416 -3:00 Arg AR%sT 1991 Mar 1
417 -4:00 - WART 1991 May 7
418 -3:00 Arg AR%sT 1999 Oct 3
419 -4:00 Arg AR%sT 2000 Mar 3
420 -3:00 - ART 2004 Jun 1
421 -4:00 - WART 2004 Jun 20
422 -3:00 Arg AR%sT 2008 Oct 18
423 -3:00 - ART
424 #
425 # San Juan (SJ)
426 Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31
427 -4:16:48 - CMT 1920 May
428 -4:00 - ART 1930 Dec
429 -4:00 Arg AR%sT 1969 Oct 5
430 -3:00 Arg AR%sT 1991 Mar 1
431 -4:00 - WART 1991 May 7
432 -3:00 Arg AR%sT 1999 Oct 3
433 -4:00 Arg AR%sT 2000 Mar 3
434 -3:00 - ART 2004 May 31
435 -4:00 - WART 2004 Jul 25
436 -3:00 Arg AR%sT 2008 Oct 18
437 -3:00 - ART
438 #
439 # Jujuy (JY)
440 Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31
441 -4:16:48 - CMT 1920 May
442 -4:00 - ART 1930 Dec
443 -4:00 Arg AR%sT 1969 Oct 5
444 -3:00 Arg AR%sT 1990 Mar 4
445 -4:00 - WART 1990 Oct 28
446 -4:00 1:00 WARST 1991 Mar 17
447 -4:00 - WART 1991 Oct 6
448 -3:00 1:00 ARST 1992
449 -3:00 Arg AR%sT 1999 Oct 3
450 -4:00 Arg AR%sT 2000 Mar 3
451 -3:00 Arg AR%sT 2008 Oct 18
452 -3:00 - ART
453 #
454 # Catamarca (CT), Chubut (CH)
455 Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31
456 -4:16:48 - CMT 1920 May
457 -4:00 - ART 1930 Dec
458 -4:00 Arg AR%sT 1969 Oct 5
459 -3:00 Arg AR%sT 1991 Mar 3
460 -4:00 - WART 1991 Oct 20
461 -3:00 Arg AR%sT 1999 Oct 3
462 -4:00 Arg AR%sT 2000 Mar 3
463 -3:00 - ART 2004 Jun 1
464 -4:00 - WART 2004 Jun 20
465 -3:00 Arg AR%sT 2008 Oct 18
466 -3:00 - ART
467 #
468 # Mendoza (MZ)
469 Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31
470 -4:16:48 - CMT 1920 May
471 -4:00 - ART 1930 Dec
472 -4:00 Arg AR%sT 1969 Oct 5
473 -3:00 Arg AR%sT 1990 Mar 4
474 -4:00 - WART 1990 Oct 15
475 -4:00 1:00 WARST 1991 Mar 1
476 -4:00 - WART 1991 Oct 15
477 -4:00 1:00 WARST 1992 Mar 1
478 -4:00 - WART 1992 Oct 18
479 -3:00 Arg AR%sT 1999 Oct 3
480 -4:00 Arg AR%sT 2000 Mar 3
481 -3:00 - ART 2004 May 23
482 -4:00 - WART 2004 Sep 26
483 -3:00 Arg AR%sT 2008 Oct 18
484 -3:00 - ART
485 #
486 # San Luis (SL)
487 Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31
488 -4:16:48 - CMT 1920 May
489 -4:00 - ART 1930 Dec
490 -4:00 Arg AR%sT 1969 Oct 5
491 -3:00 Arg AR%sT 1990
492 -3:00 1:00 ARST 1990 Mar 14
493 -4:00 - WART 1990 Oct 15
494 -4:00 1:00 WARST 1991 Mar 1
495 -4:00 - WART 1991 Jun 1
496 -3:00 - ART 1999 Oct 3
497 -4:00 1:00 WARST 2000 Mar 3
498 -3:00 - ART 2004 May 31
499 -4:00 - WART 2004 Jul 25
500 -3:00 Arg AR%sT 2008 Jan 21
501 -3:00 - ART
502 #
503 # Santa Cruz (SC)
504 Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31
505 -4:16:48 - CMT 1920 May # Cordoba Mean Time
506 -4:00 - ART 1930 Dec
507 -4:00 Arg AR%sT 1969 Oct 5
508 -3:00 Arg AR%sT 1999 Oct 3
509 -4:00 Arg AR%sT 2000 Mar 3
510 -3:00 - ART 2004 Jun 1
511 -4:00 - WART 2004 Jun 20
512 -3:00 Arg AR%sT 2008 Oct 18
513 -3:00 - ART
514 #
515 # Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF)
516 Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31
517 -4:16:48 - CMT 1920 May # Cordoba Mean Time
518 -4:00 - ART 1930 Dec
519 -4:00 Arg AR%sT 1969 Oct 5
520 -3:00 Arg AR%sT 1999 Oct 3
521 -4:00 Arg AR%sT 2000 Mar 3
522 -3:00 - ART 2004 May 30
523 -4:00 - WART 2004 Jun 20
524 -3:00 Arg AR%sT 2008 Oct 18
525 -3:00 - ART
527 # Aruba
528 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
529 Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad
530 -4:30 - ANT 1965 # Netherlands Antilles Time
531 -4:00 - AST
533 # Bolivia
534 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
535 Zone America/La_Paz -4:32:36 - LMT 1890
536 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT
537 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST
538 -4:00 - BOT # Bolivia Time
540 # Brazil
542 # From Paul Eggert (1993-11-18):
543 # The mayor of Rio recently attempted to change the time zone rules
544 # just in his city, in order to leave more summer time for the tourist trade.
545 # The rule change lasted only part of the day;
546 # the federal government refused to follow the city's rules, and business
547 # was in a chaos, so the mayor backed down that afternoon.
549 # From IATA SSIM (1996-02):
550 # _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS),
551 # Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ),
552 # Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO),
553 # Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL].
554 # [The last three states are new to this issue of the IATA SSIM.]
556 # From Gwillim Law (1996-10-07):
557 # Geography, history (Tocantins was part of Goias until 1989), and other
558 # sources of time zone information lead me to believe that AL, SE, and TO were
559 # always in BR1, and so the only change was whether or not they observed DST....
560 # The earliest issue of the SSIM I have is 2/91. Each issue from then until
561 # 9/95 says that DST is observed only in the ten states I quoted from 9/95,
562 # along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2
563 # (UTC-4).... The other two time zones given for Brazil are BR3, which is
564 # UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is
565 # UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's
566 # become part of the state of Pernambuco). The boundary between BR1 and BR2
567 # has never been clearly stated. They've simply been called East and West.
568 # However, some conclusions can be drawn from another IATA manual: the Airline
569 # Coding Directory, which lists close to 400 airports in Brazil. For each
570 # airport it gives a time zone which is coded to the SSIM. From that
571 # information, I'm led to conclude that the states of Amapa (AP), Ceara (CE),
572 # Maranhao (MA), Paraiba (PR), Pernambuco (PE), Piaui (PI), and Rio Grande do
573 # Norte (RN), and the eastern part of Para (PA) are all in BR1 without DST.
575 # From Marcos Tadeu (1998-09-27):
576 # <a href="http://pcdsh01.on.br/verao1.html">
577 # Brazilian official page
578 # </a>
580 # From Jesper Norgaard (2000-11-03):
581 # [For an official list of which regions in Brazil use which time zones, see:]
582 # http://pcdsh01.on.br/Fusbr.htm
583 # http://pcdsh01.on.br/Fusbrhv.htm
585 # From Celso Doria via David Madeo (2002-10-09):
586 # The reason for the delay this year has to do with elections in Brazil.
587 #
588 # Unlike in the United States, elections in Brazil are 100% computerized and
589 # the results are known almost immediately. Yesterday, it was the first
590 # round of the elections when 115 million Brazilians voted for President,
591 # Governor, Senators, Federal Deputies, and State Deputies. Nobody is
592 # counting (or re-counting) votes anymore and we know there will be a second
593 # round for the Presidency and also for some Governors. The 2nd round will
594 # take place on October 27th.
595 #
596 # The reason why the DST will only begin November 3rd is that the thousands
597 # of electoral machines used cannot have their time changed, and since the
598 # Constitution says the elections must begin at 8:00 AM and end at 5:00 PM,
599 # the Government decided to postpone DST, instead of changing the Constitution
600 # (maybe, for the next elections, it will be possible to change the clock)...
602 # From Rodrigo Severo (2004-10-04):
603 # It's just the biannual change made necessary by the much hyped, supposedly
604 # modern Brazilian eletronic voting machines which, apparently, can't deal
605 # with a time change between the first and the second rounds of the elections.
607 # From Steffen Thorsen (2007-09-20):
608 # Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00:
609 # http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975
611 # From Paul Schulze (2008-06-24):
612 # ...by law number 11.662 of April 24, 2008 (published in the "Diario
613 # Oficial da Uniao"...) in Brazil there are changes in the timezones,
614 # effective today (00:00am at June 24, 2008) as follows:
615 #
616 # a) The timezone UTC+5 is e[x]tinguished, with all the Acre state and the
617 # part of the Amazonas state that had this timezone now being put to the
618 # timezone UTC+4
619 # b) The whole Para state now is put at timezone UTC+3, instead of just
620 # part of it, as was before.
621 #
622 # This change follows a proposal of senator Tiao Viana of Acre state, that
623 # proposed it due to concerns about open television channels displaying
624 # programs inappropriate to youths in the states that had the timezone
625 # UTC+5 too early in the night. In the occasion, some more corrections
626 # were proposed, trying to unify the timezones of any given state. This
627 # change modifies timezone rules defined in decree 2.784 of 18 June,
628 # 1913.
630 # From Rodrigo Severo (2008-06-24):
631 # Just correcting the URL:
632 # <a href="https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=3Ddo&secao=3D1&pagina=3D1&data=3D25/04/2008">
633 # https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=3Ddo&secao=3D1&pagina=3D1&data=3D25/04/2008
634 # </a>
635 #
636 # As a result of the above Decree I believe the America/Rio_Branco
637 # timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall
638 # be created to represent the the west side of the Para State. I
639 # suggest this new timezone be called Santarem as the most
640 # important/populated city in the affected area.
641 #
642 # This new timezone would be the same as the Rio_Branco timezone up to
643 # the 2008/06/24 change which would be to UTC-3 instead of UTC-4.
645 # From Alex Krivenyshev (2008-06-24):
646 # This is a quick reference page for New and Old Brazil Time Zones map.
647 # <a href="http://www.worldtimezone.com/brazil-time-new-old.php">
648 # http://www.worldtimezone.com/brazil-time-new-old.php
649 # </a>
650 #
651 # - 4 time zones replaced by 3 time zones-eliminating time zone UTC- 05
652 # (state Acre and the part of the Amazonas will be UTC/GMT- 04) - western
653 # part of Par state is moving to one timezone UTC- 03 (from UTC -04).
655 # From Paul Eggert (2002-10-10):
656 # The official decrees referenced below are mostly taken from
657 # <a href="http://pcdsh01.on.br/DecHV.html">
658 # Decretos sobre o Horario de Verao no Brasil
659 # </a>.
661 # From Steffen Thorsen (2008-08-29):
662 # As announced by the government and many newspapers in Brazil late
663 # yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and
664 # it will end on 2009-02-15 (current rule for Brazil is fine). Based on
665 # past years experience with the elections, there was a good chance that
666 # the start was postponed to November, but it did not happen this year.
667 #
668 # It has not yet been posted to http://pcdsh01.on.br/DecHV.html
669 #
670 # An official page about it:
671 # <a href="http://www.mme.gov.br/site/news/detail.do?newsId=16722">
672 # http://www.mme.gov.br/site/news/detail.do?newsId=16722
673 # </a>
674 # Note that this link does not always work directly, but must be accessed
675 # by going to
676 # <a href="http://www.mme.gov.br/first">
677 # http://www.mme.gov.br/first
678 # </a>
679 #
680 # One example link that works directly:
681 # <a href="http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54">
682 # http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54
683 # (Portuguese)
684 # </a>
685 #
686 # We have a written a short article about it as well:
687 # <a href="http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html">
688 # http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html
689 # </a>
691 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
692 # Decree <a href="http://pcdsh01.on.br/HV20466.htm">20,466</a> (1931-10-01)
693 # Decree <a href="http://pcdsh01.on.br/HV21896.htm">21,896</a> (1932-01-10)
694 Rule Brazil 1931 only - Oct 3 11:00 1:00 S
695 Rule Brazil 1932 1933 - Apr 1 0:00 0 -
696 Rule Brazil 1932 only - Oct 3 0:00 1:00 S
697 # Decree <a href="http://pcdsh01.on.br/HV23195.htm">23,195</a> (1933-10-10)
698 # revoked DST.
699 # Decree <a href="http://pcdsh01.on.br/HV27496.htm">27,496</a> (1949-11-24)
700 # Decree <a href="http://pcdsh01.on.br/HV27998.htm">27,998</a> (1950-04-13)
701 Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S
702 Rule Brazil 1950 only - Apr 16 1:00 0 -
703 Rule Brazil 1951 1952 - Apr 1 0:00 0 -
704 # Decree <a href="http://pcdsh01.on.br/HV32308.htm">32,308</a> (1953-02-24)
705 Rule Brazil 1953 only - Mar 1 0:00 0 -
706 # Decree <a href="http://pcdsh01.on.br/HV34724.htm">34,724</a> (1953-11-30)
707 # revoked DST.
708 # Decree <a href="http://pcdsh01.on.br/HV52700.htm">52,700</a> (1963-10-18)
709 # established DST from 1963-10-23 00:00 to 1964-02-29 00:00
710 # in SP, RJ, GB, MG, ES, due to the prolongation of the drought.
711 # Decree <a href="http://pcdsh01.on.br/HV53071.htm">53,071</a> (1963-12-03)
712 # extended the above decree to all of the national territory on 12-09.
713 Rule Brazil 1963 only - Dec 9 0:00 1:00 S
714 # Decree <a href="http://pcdsh01.on.br/HV53604.htm">53,604</a> (1964-02-25)
715 # extended summer time by one day to 1964-03-01 00:00 (start of school).
716 Rule Brazil 1964 only - Mar 1 0:00 0 -
717 # Decree <a href="http://pcdsh01.on.br/HV55639.htm">55,639</a> (1965-01-27)
718 Rule Brazil 1965 only - Jan 31 0:00 1:00 S
719 Rule Brazil 1965 only - Mar 31 0:00 0 -
720 # Decree <a href="http://pcdsh01.on.br/HV57303.htm">57,303</a> (1965-11-22)
721 Rule Brazil 1965 only - Dec 1 0:00 1:00 S
722 # Decree <a href="http://pcdsh01.on.br/HV57843.htm">57,843</a> (1966-02-18)
723 Rule Brazil 1966 1968 - Mar 1 0:00 0 -
724 Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S
725 # Decree <a href="http://pcdsh01.on.br/HV63429.htm">63,429</a> (1968-10-15)
726 # revoked DST.
727 # Decree <a href="http://pcdsh01.on.br/HV91698.htm">91,698</a> (1985-09-27)
728 Rule Brazil 1985 only - Nov 2 0:00 1:00 S
729 # Decree 92,310 (1986-01-21)
730 # Decree 92,463 (1986-03-13)
731 Rule Brazil 1986 only - Mar 15 0:00 0 -
732 # Decree 93,316 (1986-10-01)
733 Rule Brazil 1986 only - Oct 25 0:00 1:00 S
734 Rule Brazil 1987 only - Feb 14 0:00 0 -
735 # Decree <a href="http://pcdsh01.on.br/HV94922.htm">94,922</a> (1987-09-22)
736 Rule Brazil 1987 only - Oct 25 0:00 1:00 S
737 Rule Brazil 1988 only - Feb 7 0:00 0 -
738 # Decree <a href="http://pcdsh01.on.br/HV96676.htm">96,676</a> (1988-09-12)
739 # except for the states of AC, AM, PA, RR, RO, and AP (then a territory)
740 Rule Brazil 1988 only - Oct 16 0:00 1:00 S
741 Rule Brazil 1989 only - Jan 29 0:00 0 -
742 # Decree <a href="http://pcdsh01.on.br/HV98077.htm">98,077</a> (1989-08-21)
743 # with the same exceptions
744 Rule Brazil 1989 only - Oct 15 0:00 1:00 S
745 Rule Brazil 1990 only - Feb 11 0:00 0 -
746 # Decree <a href="http://pcdsh01.on.br/HV99530.htm">99,530</a> (1990-09-17)
747 # adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF.
748 # Decree 99,629 (1990-10-19) adds BA, MT.
749 Rule Brazil 1990 only - Oct 21 0:00 1:00 S
750 Rule Brazil 1991 only - Feb 17 0:00 0 -
751 # <a href="http://pcdsh01.on.br/HV1991.htm">Unnumbered decree</a> (1991-09-25)
752 # adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF.
753 Rule Brazil 1991 only - Oct 20 0:00 1:00 S
754 Rule Brazil 1992 only - Feb 9 0:00 0 -
755 # <a href="http://pcdsh01.on.br/HV1992.htm">Unnumbered decree</a> (1992-10-16)
756 # adopted by same states.
757 Rule Brazil 1992 only - Oct 25 0:00 1:00 S
758 Rule Brazil 1993 only - Jan 31 0:00 0 -
759 # Decree <a href="http://pcdsh01.on.br/HV942.htm">942</a> (1993-09-28)
760 # adopted by same states, plus AM.
761 # Decree <a href="http://pcdsh01.on.br/HV1252.htm">1,252</a> (1994-09-22;
762 # web page corrected 2004-01-07) adopted by same states, minus AM.
763 # Decree <a href="http://pcdsh01.on.br/HV1636.htm">1,636</a> (1995-09-14)
764 # adopted by same states, plus MT and TO.
765 # Decree <a href="http://pcdsh01.on.br/HV1674.htm">1,674</a> (1995-10-13)
766 # adds AL, SE.
767 Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S
768 Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 -
769 Rule Brazil 1996 only - Feb 11 0:00 0 -
770 # Decree <a href="http://pcdsh01.on.br/HV2000.htm">2,000</a> (1996-09-04)
771 # adopted by same states, minus AL, SE.
772 Rule Brazil 1996 only - Oct 6 0:00 1:00 S
773 Rule Brazil 1997 only - Feb 16 0:00 0 -
774 # From Daniel C. Sobral (1998-02-12):
775 # In 1997, the DS began on October 6. The stated reason was that
776 # because international television networks ignored Brazil's policy on DS,
777 # they bought the wrong times on satellite for coverage of Pope's visit.
778 # This year, the ending date of DS was postponed to March 1
779 # to help dealing with the shortages of electric power.
780 #
781 # Decree 2,317 (1997-09-04), adopted by same states.
782 Rule Brazil 1997 only - Oct 6 0:00 1:00 S
783 # Decree <a href="http://pcdsh01.on.br/figuras/HV2495.JPG">2,495</a>
784 # (1998-02-10)
785 Rule Brazil 1998 only - Mar 1 0:00 0 -
786 # Decree <a href="http://pcdsh01.on.br/figuras/Hv98.jpg">2,780</a> (1998-09-11)
787 # adopted by the same states as before.
788 Rule Brazil 1998 only - Oct 11 0:00 1:00 S
789 Rule Brazil 1999 only - Feb 21 0:00 0 -
790 # Decree <a href="http://pcdsh01.on.br/figuras/HV3150.gif">3,150</a>
791 # (1999-08-23) adopted by same states.
792 # Decree <a href="http://pcdsh01.on.br/DecHV99.gif">3,188</a> (1999-09-30)
793 # adds SE, AL, PB, PE, RN, CE, PI, MA and RR.
794 Rule Brazil 1999 only - Oct 3 0:00 1:00 S
795 Rule Brazil 2000 only - Feb 27 0:00 0 -
796 # Decree <a href="http://pcdsh01.on.br/DEC3592.htm">3,592</a> (2000-09-06)
797 # adopted by the same states as before.
798 # Decree <a href="http://pcdsh01.on.br/Dec3630.jpg">3,630</a> (2000-10-13)
799 # repeals DST in PE and RR, effective 2000-10-15 00:00.
800 # Decree <a href="http://pcdsh01.on.br/Dec3632.jpg">3,632</a> (2000-10-17)
801 # repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
802 # Decree <a href="http://pcdsh01.on.br/figuras/HV3916.gif">3,916</a>
803 # (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE.
804 Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S
805 Rule Brazil 2001 2006 - Feb Sun>=15 0:00 0 -
806 # Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE.
807 # <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm">4,399</a>
808 Rule Brazil 2002 only - Nov 3 0:00 1:00 S
809 # Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
810 # <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm">4,844</a>
811 Rule Brazil 2003 only - Oct 19 0:00 1:00 S
812 # Decree 5,223 (2004-10-01) reestablishes DST in MT.
813 # <a href="http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm">5,223</a>
814 Rule Brazil 2004 only - Nov 2 0:00 1:00 S
815 # Decree <a href="http://pcdsh01.on.br/DecHV5539.gif">5,539</a> (2005-09-19),
816 # adopted by the same states as before.
817 Rule Brazil 2005 only - Oct 16 0:00 1:00 S
818 # Decree <a href="http://pcdsh01.on.br/DecHV5920.gif">5,920</a> (2006-10-03),
819 # adopted by the same states as before.
820 Rule Brazil 2006 only - Nov 5 0:00 1:00 S
821 Rule Brazil 2007 only - Feb 25 0:00 0 -
822 # Decree <a href="http://pcdsh01.on.br/DecHV6212.gif">6,212</a> (2007-09-26),
823 # adopted by the same states as before.
824 Rule Brazil 2007 only - Oct Sun>=8 0:00 1:00 S
825 # From Frederico A. C. Neves (2008-09-10):
826 # Acording to this decree
827 # <a href="http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm">
828 # http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm
829 # </a>
830 # [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the
831 # 3rd Feb Sunday. There is an exception on the return date when this is
832 # the Carnival Sunday then the return date will be the next Sunday...
833 Rule Brazil 2008 max - Oct Sun>=15 0:00 1:00 S
834 Rule Brazil 2008 2011 - Feb Sun>=15 0:00 0 -
835 Rule Brazil 2012 only - Feb Sun>=22 0:00 0 -
836 Rule Brazil 2013 2014 - Feb Sun>=15 0:00 0 -
837 Rule Brazil 2015 only - Feb Sun>=22 0:00 0 -
838 Rule Brazil 2016 2022 - Feb Sun>=15 0:00 0 -
839 Rule Brazil 2023 only - Feb Sun>=22 0:00 0 -
840 Rule Brazil 2024 2025 - Feb Sun>=15 0:00 0 -
841 Rule Brazil 2026 only - Feb Sun>=22 0:00 0 -
842 Rule Brazil 2027 2033 - Feb Sun>=15 0:00 0 -
843 Rule Brazil 2034 only - Feb Sun>=22 0:00 0 -
844 Rule Brazil 2035 2036 - Feb Sun>=15 0:00 0 -
845 Rule Brazil 2037 only - Feb Sun>=22 0:00 0 -
846 # From Arthur David Olson (2008-09-29):
847 # The next is wrong in some years but is better than nothing.
848 Rule Brazil 2038 max - Feb Sun>=15 0:00 0 -
850 # The latest ruleset listed above says that the following states observe DST:
851 # DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP.
853 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
854 #
855 # Fernando de Noronha (administratively part of PE)
856 Zone America/Noronha -2:09:40 - LMT 1914
857 -2:00 Brazil FN%sT 1990 Sep 17
858 -2:00 - FNT 1999 Sep 30
859 -2:00 Brazil FN%sT 2000 Oct 15
860 -2:00 - FNT 2001 Sep 13
861 -2:00 Brazil FN%sT 2002 Oct 1
862 -2:00 - FNT
863 # Other Atlantic islands have no permanent settlement.
864 # These include Trindade and Martin Vaz (administratively part of ES),
865 # Atol das Rocas (RN), and Penedos de Sao Pedro e Sao Paulo (PE).
866 # Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01;
867 # it also included the Penedos.
868 #
869 # Amapa (AP), east Para (PA)
870 # East Para includes Belem, Maraba, Serra Norte, and Sao Felix do Xingu.
871 # The division between east and west Para is the river Xingu.
872 # In the north a very small part from the river Javary (now Jari I guess,
873 # the border with Amapa) to the Amazon, then to the Xingu.
874 Zone America/Belem -3:13:56 - LMT 1914
875 -3:00 Brazil BR%sT 1988 Sep 12
876 -3:00 - BRT
877 #
878 # west Para (PA)
879 # West Para includes Altamira, Oribidos, Prainha, Oriximina, and Santarem.
880 Zone America/Santarem -3:38:48 - LMT 1914
881 -4:00 Brazil AM%sT 1988 Sep 12
882 -4:00 - AMT 2008 Jun 24 00:00
883 -3:00 - BRT
884 #
885 # Maranhao (MA), Piaui (PI), Ceara (CE), Rio Grande do Norte (RN),
886 # Paraiba (PB)
887 Zone America/Fortaleza -2:34:00 - LMT 1914
888 -3:00 Brazil BR%sT 1990 Sep 17
889 -3:00 - BRT 1999 Sep 30
890 -3:00 Brazil BR%sT 2000 Oct 22
891 -3:00 - BRT 2001 Sep 13
892 -3:00 Brazil BR%sT 2002 Oct 1
893 -3:00 - BRT
894 #
895 # Pernambuco (PE) (except Atlantic islands)
896 Zone America/Recife -2:19:36 - LMT 1914
897 -3:00 Brazil BR%sT 1990 Sep 17
898 -3:00 - BRT 1999 Sep 30
899 -3:00 Brazil BR%sT 2000 Oct 15
900 -3:00 - BRT 2001 Sep 13
901 -3:00 Brazil BR%sT 2002 Oct 1
902 -3:00 - BRT
903 #
904 # Tocantins (TO)
905 Zone America/Araguaina -3:12:48 - LMT 1914
906 -3:00 Brazil BR%sT 1990 Sep 17
907 -3:00 - BRT 1995 Sep 14
908 -3:00 Brazil BR%sT 2003 Sep 24
909 -3:00 - BRT
910 #
911 # Alagoas (AL), Sergipe (SE)
912 Zone America/Maceio -2:22:52 - LMT 1914
913 -3:00 Brazil BR%sT 1990 Sep 17
914 -3:00 - BRT 1995 Oct 13
915 -3:00 Brazil BR%sT 1996 Sep 4
916 -3:00 - BRT 1999 Sep 30
917 -3:00 Brazil BR%sT 2000 Oct 22
918 -3:00 - BRT 2001 Sep 13
919 -3:00 Brazil BR%sT 2002 Oct 1
920 -3:00 - BRT
921 #
922 # Bahia (BA)
923 # There are too many Salvadors elsewhere, so use America/Bahia instead
924 # of America/Salvador.
925 Zone America/Bahia -2:34:04 - LMT 1914
926 -3:00 Brazil BR%sT 2003 Sep 24
927 -3:00 - BRT
928 #
929 # Goias (GO), Distrito Federal (DF), Minas Gerais (MG),
930 # Espirito Santo (ES), Rio de Janeiro (RJ), Sao Paulo (SP), Parana (PR),
931 # Santa Catarina (SC), Rio Grande do Sul (RS)
932 Zone America/Sao_Paulo -3:06:28 - LMT 1914
933 -3:00 Brazil BR%sT 1963 Oct 23 00:00
934 -3:00 1:00 BRST 1964
935 -3:00 Brazil BR%sT
936 #
937 # Mato Grosso do Sul (MS)
938 Zone America/Campo_Grande -3:38:28 - LMT 1914
939 -4:00 Brazil AM%sT
940 #
941 # Mato Grosso (MT)
942 Zone America/Cuiaba -3:44:20 - LMT 1914
943 -4:00 Brazil AM%sT 2003 Sep 24
944 -4:00 - AMT 2004 Oct 1
945 -4:00 Brazil AM%sT
946 #
947 # Rondonia (RO)
948 Zone America/Porto_Velho -4:15:36 - LMT 1914
949 -4:00 Brazil AM%sT 1988 Sep 12
950 -4:00 - AMT
951 #
952 # Roraima (RR)
953 Zone America/Boa_Vista -4:02:40 - LMT 1914
954 -4:00 Brazil AM%sT 1988 Sep 12
955 -4:00 - AMT 1999 Sep 30
956 -4:00 Brazil AM%sT 2000 Oct 15
957 -4:00 - AMT
958 #
959 # east Amazonas (AM): Boca do Acre, Jutai, Manaus, Floriano Peixoto
960 # The great circle line from Tabatinga to Porto Acre divides
961 # east from west Amazonas.
962 Zone America/Manaus -4:00:04 - LMT 1914
963 -4:00 Brazil AM%sT 1988 Sep 12
964 -4:00 - AMT 1993 Sep 28
965 -4:00 Brazil AM%sT 1994 Sep 22
966 -4:00 - AMT
967 #
968 # west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant,
969 # Eirunepe, Envira, Ipixuna
970 Zone America/Eirunepe -4:39:28 - LMT 1914
971 -5:00 Brazil AC%sT 1988 Sep 12
972 -5:00 - ACT 1993 Sep 28
973 -5:00 Brazil AC%sT 1994 Sep 22
974 -5:00 - ACT 2008 Jun 24 00:00
975 -4:00 - AMT
976 #
977 # Acre (AC)
978 Zone America/Rio_Branco -4:31:12 - LMT 1914
979 -5:00 Brazil AC%sT 1988 Sep 12
980 -5:00 - ACT 2008 Jun 24 00:00
981 -4:00 - AMT
983 # Chile
985 # From Eduardo Krell (1995-10-19):
986 # The law says to switch to DST at midnight [24:00] on the second SATURDAY
987 # of October.... The law is the same for March and October.
988 # (1998-09-29):
989 # Because of the drought this year, the government decided to go into
990 # DST earlier (saturday 9/26 at 24:00). This is a one-time change only ...
991 # (unless there's another dry season next year, I guess).
993 # From Julio I. Pacheco Troncoso (1999-03-18):
994 # Because of the same drought, the government decided to end DST later,
995 # on April 3, (one-time change).
997 # From Oscar van Vlijmen (2006-10-08):
998 # http://www.horaoficial.cl/cambio.htm
1000 # From Jesper Norgaard Welen (2006-10-08):
1001 # I think that there are some obvious mistakes in the suggested link
1002 # from Oscar van Vlijmen,... for instance entry 66 says that GMT-4
1003 # ended 1990-09-12 while entry 67 only begins GMT-3 at 1990-09-15
1004 # (they should have been 1990-09-15 and 1990-09-16 respectively), but
1005 # anyhow it clears up some doubts too.
1007 # From Paul Eggert (2006-12-27):
1008 # The following data for Chile and America/Santiago are from
1009 # <http://www.horaoficial.cl/horaof.htm> (2006-09-20), transcribed by
1010 # Jesper Norgaard Welen. The data for Pacific/Easter are from Shanks
1011 # & Pottenger, except with DST transitions after 1932 cloned from
1012 # America/Santiago. The pre-1980 Pacific/Easter data are dubious,
1013 # but we have no other source.
1015 # From German Poo-Caaman~o (2008-03-03):
1016 # Due to drought, Chile extends Daylight Time in three weeks. This
1017 # is one-time change (Saturday 3/29 at 24:00 for America/Santiago
1018 # and Saturday 3/29 at 22:00 for Pacific/Easter)
1019 # The Supreme Decree is located at
1020 # <a href="http://www.shoa.cl/servicios/supremo316.pdf">
1021 # http://www.shoa.cl/servicios/supremo316.pdf
1022 # </a>
1023 # and the instructions for 2008 are located in:
1024 # <a href="http://www.horaoficial.cl/cambio.htm">
1025 # http://www.horaoficial.cl/cambio.htm
1026 # </a>.
1028 # From Jose Miguel Garrido (2008-03-05):
1029 # ...
1030 # You could see the announces of the change on
1031 # <a href="http://www.shoa.cl/noticias/2008/04hora/hora.htm">
1032 # http://www.shoa.cl/noticias/2008/04hora/hora.htm
1033 # </a>.
1035 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1036 Rule Chile 1927 1932 - Sep 1 0:00 1:00 S
1037 Rule Chile 1928 1932 - Apr 1 0:00 0 -
1038 Rule Chile 1942 only - Jun 1 4:00u 0 -
1039 Rule Chile 1942 only - Aug 1 5:00u 1:00 S
1040 Rule Chile 1946 only - Jul 15 4:00u 1:00 S
1041 Rule Chile 1946 only - Sep 1 3:00u 0:00 -
1042 Rule Chile 1947 only - Apr 1 4:00u 0 -
1043 Rule Chile 1968 only - Nov 3 4:00u 1:00 S
1044 Rule Chile 1969 only - Mar 30 3:00u 0 -
1045 Rule Chile 1969 only - Nov 23 4:00u 1:00 S
1046 Rule Chile 1970 only - Mar 29 3:00u 0 -
1047 Rule Chile 1971 only - Mar 14 3:00u 0 -
1048 Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S
1049 Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 -
1050 Rule Chile 1973 only - Sep 30 4:00u 1:00 S
1051 Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S
1052 Rule Chile 1987 only - Apr 12 3:00u 0 -
1053 Rule Chile 1988 1989 - Mar Sun>=9 3:00u 0 -
1054 Rule Chile 1988 only - Oct Sun>=1 4:00u 1:00 S
1055 Rule Chile 1989 only - Oct Sun>=9 4:00u 1:00 S
1056 Rule Chile 1990 only - Mar 18 3:00u 0 -
1057 Rule Chile 1990 only - Sep 16 4:00u 1:00 S
1058 Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 -
1059 Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S
1060 Rule Chile 1997 only - Mar 30 3:00u 0 -
1061 Rule Chile 1998 only - Mar Sun>=9 3:00u 0 -
1062 Rule Chile 1998 only - Sep 27 4:00u 1:00 S
1063 Rule Chile 1999 only - Apr 4 3:00u 0 -
1064 Rule Chile 1999 max - Oct Sun>=9 4:00u 1:00 S
1065 Rule Chile 2000 2007 - Mar Sun>=9 3:00u 0 -
1066 # N.B.: the end of March 29 in Chile is March 30 in Universal time,
1067 # which is used below in specifying the transition.
1068 Rule Chile 2008 only - Mar 30 3:00u 0 -
1069 Rule Chile 2009 max - Mar Sun>=9 3:00u 0 -
1070 # IATA SSIM anomalies: (1992-02) says 1992-03-14;
1071 # (1996-09) says 1998-03-08. Ignore these.
1072 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1073 Zone America/Santiago -4:42:46 - LMT 1890
1074 -4:42:46 - SMT 1910 # Santiago Mean Time
1075 -5:00 - CLT 1916 Jul 1 # Chile Time
1076 -4:42:46 - SMT 1918 Sep 1 # Santiago Mean Time
1077 -4:00 - CLT 1919 Jul 1 # Chile Time
1078 -4:42:46 - SMT 1927 Sep 1 # Santiago Mean Time
1079 -5:00 Chile CL%sT 1947 May 22 # Chile Time
1080 -4:00 Chile CL%sT
1081 Zone Pacific/Easter -7:17:44 - LMT 1890
1082 -7:17:28 - EMT 1932 Sep # Easter Mean Time
1083 -7:00 Chile EAS%sT 1982 Mar 13 21:00 # Easter I Time
1084 -6:00 Chile EAS%sT
1085 #
1086 # Sala y Gomez Island is like Pacific/Easter.
1087 # Other Chilean locations, including Juan Fernandez Is, San Ambrosio,
1088 # San Felix, and Antarctic bases, are like America/Santiago.
1090 # Colombia
1091 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1092 Rule CO 1992 only - May 3 0:00 1:00 S
1093 Rule CO 1993 only - Apr 4 0:00 0 -
1094 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1095 Zone America/Bogota -4:56:20 - LMT 1884 Mar 13
1096 -4:56:20 - BMT 1914 Nov 23 # Bogota Mean Time
1097 -5:00 CO CO%sT # Colombia Time
1098 # Malpelo, Providencia, San Andres
1099 # no information; probably like America/Bogota
1101 # Curacao
1102 #
1103 # From Paul Eggert (2006-03-22):
1104 # Shanks & Pottenger say that The Bottom and Philipsburg have been at
1105 # -4:00 since standard time was introduced on 1912-03-02; and that
1106 # Kralendijk and Rincon used Kralendijk Mean Time (-4:33:08) from
1107 # 1912-02-02 to 1965-01-01. The former is dubious, since S&P also say
1108 # Saba Island has been like Curacao.
1109 # This all predates our 1970 cutoff, though.
1110 #
1111 # By July 2007 Curacao and St Maarten are planned to become
1112 # associated states within the Netherlands, much like Aruba;
1113 # Bonaire, Saba and St Eustatius would become directly part of the
1114 # Netherlands as Kingdom Islands. This won't affect their time zones
1115 # though, as far as we know.
1116 #
1117 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1118 Zone America/Curacao -4:35:44 - LMT 1912 Feb 12 # Willemstad
1119 -4:30 - ANT 1965 # Netherlands Antilles Time
1120 -4:00 - AST
1122 # Ecuador
1123 #
1124 # From Paul Eggert (2007-03-04):
1125 # Apparently Ecuador had a failed experiment with DST in 1992.
1126 # <http://midena.gov.ec/content/view/1261/208/> (2007-02-27) and
1127 # <http://www.hoy.com.ec/NoticiaNue.asp?row_id=249856> (2006-11-06) both
1128 # talk about "hora Sixto". Leave this alone for now, as we have no data.
1129 #
1130 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1131 Zone America/Guayaquil -5:19:20 - LMT 1890
1132 -5:14:00 - QMT 1931 # Quito Mean Time
1133 -5:00 - ECT # Ecuador Time
1134 Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno
1135 -5:00 - ECT 1986
1136 -6:00 - GALT # Galapagos Time
1138 # Falklands
1140 # From Paul Eggert (2006-03-22):
1141 # Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except
1142 # the IATA gives 1996-09-08. Go with Shanks & Pottenger.
1144 # From Falkland Islands Government Office, London (2001-01-22)
1145 # via Jesper Norgaard:
1146 # ... the clocks revert back to Local Mean Time at 2 am on Sunday 15
1147 # April 2001 and advance one hour to summer time at 2 am on Sunday 2
1148 # September. It is anticipated that the clocks will revert back at 2
1149 # am on Sunday 21 April 2002 and advance to summer time at 2 am on
1150 # Sunday 1 September.
1152 # From Rives McDow (2001-02-13):
1153 #
1154 # I have communicated several times with people there, and the last
1155 # time I had communications that was helpful was in 1998. Here is
1156 # what was said then:
1157 #
1158 # "The general rule was that Stanley used daylight saving and the Camp
1159 # did not. However for various reasons many people in the Camp have
1160 # started to use daylight saving (known locally as 'Stanley Time')
1161 # There is no rule as to who uses daylight saving - it is a matter of
1162 # personal choice and so it is impossible to draw a map showing who
1163 # uses it and who does not. Any list would be out of date as soon as
1164 # it was produced. This year daylight saving ended on April 18/19th
1165 # and started again on September 12/13th. I do not know what the rule
1166 # is, but can find out if you like. We do not change at the same time
1167 # as UK or Chile."
1168 #
1169 # I did have in my notes that the rule was "Second Saturday in Sep at
1170 # 0:00 until third Saturday in Apr at 0:00". I think that this does
1171 # not agree in some cases with Shanks; is this true?
1172 #
1173 # Also, there is no mention in the list that some areas in the
1174 # Falklands do not use DST. I have found in my communications there
1175 # that these areas are on the western half of East Falkland and all of
1176 # West Falkland. Stanley is the only place that consistently observes
1177 # DST. Again, as in other places in the world, the farmers don't like
1178 # it. West Falkland is almost entirely sheep farmers.
1179 #
1180 # I know one lady there that keeps a list of which farm keeps DST and
1181 # which doesn't each year. She runs a shop in Stanley, and says that
1182 # the list changes each year. She uses it to communicate to her
1183 # customers, catching them when they are home for lunch or dinner.
1185 # From Paul Eggert (2001-03-05):
1186 # For now, we'll just record the time in Stanley, since we have no
1187 # better info.
1189 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1190 Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S
1191 Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 -
1192 Rule Falk 1939 only - Oct 1 0:00 1:00 S
1193 Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S
1194 Rule Falk 1943 only - Jan 1 0:00 0 -
1195 Rule Falk 1983 only - Sep lastSun 0:00 1:00 S
1196 Rule Falk 1984 1985 - Apr lastSun 0:00 0 -
1197 Rule Falk 1984 only - Sep 16 0:00 1:00 S
1198 Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S
1199 Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 -
1200 Rule Falk 2001 max - Apr Sun>=15 2:00 0 -
1201 Rule Falk 2001 max - Sep Sun>=1 2:00 1:00 S
1202 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1203 Zone Atlantic/Stanley -3:51:24 - LMT 1890
1204 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time
1205 -4:00 Falk FK%sT 1983 May # Falkland Is Time
1206 -3:00 Falk FK%sT 1985 Sep 15
1207 -4:00 Falk FK%sT
1209 # French Guiana
1210 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1211 Zone America/Cayenne -3:29:20 - LMT 1911 Jul
1212 -4:00 - GFT 1967 Oct # French Guiana Time
1213 -3:00 - GFT
1215 # Guyana
1216 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1217 Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown
1218 -3:45 - GBGT 1966 May 26 # Br Guiana Time
1219 -3:45 - GYT 1975 Jul 31 # Guyana Time
1220 -3:00 - GYT 1991
1221 # IATA SSIM (1996-06) says -4:00. Assume a 1991 switch.
1222 -4:00 - GYT
1224 # Paraguay
1225 # From Paul Eggert (2006-03-22):
1226 # Shanks & Pottenger say that spring transitions are from 01:00 -> 02:00,
1227 # and autumn transitions are from 00:00 -> 23:00. Go with pre-1999
1228 # editions of Shanks, and with the IATA, who say transitions occur at 00:00.
1229 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1230 Rule Para 1975 1988 - Oct 1 0:00 1:00 S
1231 Rule Para 1975 1978 - Mar 1 0:00 0 -
1232 Rule Para 1979 1991 - Apr 1 0:00 0 -
1233 Rule Para 1989 only - Oct 22 0:00 1:00 S
1234 Rule Para 1990 only - Oct 1 0:00 1:00 S
1235 Rule Para 1991 only - Oct 6 0:00 1:00 S
1236 Rule Para 1992 only - Mar 1 0:00 0 -
1237 Rule Para 1992 only - Oct 5 0:00 1:00 S
1238 Rule Para 1993 only - Mar 31 0:00 0 -
1239 Rule Para 1993 1995 - Oct 1 0:00 1:00 S
1240 Rule Para 1994 1995 - Feb lastSun 0:00 0 -
1241 Rule Para 1996 only - Mar 1 0:00 0 -
1242 # IATA SSIM (2000-02) says 1999-10-10; ignore this for now.
1243 # From Steffen Thorsen (2000-10-02):
1244 # I have three independent reports that Paraguay changed to DST this Sunday
1245 # (10-01).
1246 #
1247 # Translated by Gwillim Law (2001-02-27) from
1248 # <a href="http://www.diarionoticias.com.py/011000/nacional/naciona1.htm">
1249 # Noticias, a daily paper in Asuncion, Paraguay (2000-10-01)
1250 # </a>:
1251 # Starting at 0:00 today, the clock will be set forward 60 minutes, in
1252 # fulfillment of Decree No. 7,273 of the Executive Power.... The time change
1253 # system has been operating for several years. Formerly there was a separate
1254 # decree each year; the new law has the same effect, but permanently. Every
1255 # year, the time will change on the first Sunday of October; likewise, the
1256 # clock will be set back on the first Sunday of March.
1257 #
1258 Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S
1259 # IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger.
1260 Rule Para 1997 only - Feb lastSun 0:00 0 -
1261 # Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but
1262 # (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27).
1263 Rule Para 1998 2001 - Mar Sun>=1 0:00 0 -
1264 # From Rives McDow (2002-02-28):
1265 # A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the
1266 # dst method to be from the first Sunday in September to the first Sunday in
1267 # April.
1268 Rule Para 2002 2004 - Apr Sun>=1 0:00 0 -
1269 Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S
1270 #
1271 # From Jesper Norgaard Welen (2005-01-02):
1272 # There are several sources that claim that Paraguay made
1273 # a timezone rule change in autumn 2004.
1274 # From Steffen Thorsen (2005-01-05):
1275 # Decree 1,867 (2004-03-05)
1276 # From Carlos Raul Perasso via Jesper Norgaard Welen (2006-10-13)
1277 # <http://www.presidencia.gov.py/decretos/D1867.pdf>
1278 Rule Para 2004 max - Oct Sun>=15 0:00 1:00 S
1279 Rule Para 2005 max - Mar Sun>=8 0:00 0 -
1281 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1282 Zone America/Asuncion -3:50:40 - LMT 1890
1283 -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time
1284 -4:00 - PYT 1972 Oct # Paraguay Time
1285 -3:00 - PYT 1974 Apr
1286 -4:00 Para PY%sT
1288 # Peru
1289 #
1290 # <a href="news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net">
1291 # From Evelyn C. Leeper via Mark Brader (2003-10-26):</a>
1292 # When we were in Peru in 1985-1986, they apparently switched over
1293 # sometime between December 29 and January 3 while we were on the Amazon.
1294 #
1295 # From Paul Eggert (2006-03-22):
1296 # Shanks & Pottenger don't have this transition. Assume 1986 was like 1987.
1298 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1299 Rule Peru 1938 only - Jan 1 0:00 1:00 S
1300 Rule Peru 1938 only - Apr 1 0:00 0 -
1301 Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S
1302 Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 -
1303 Rule Peru 1986 1987 - Jan 1 0:00 1:00 S
1304 Rule Peru 1986 1987 - Apr 1 0:00 0 -
1305 Rule Peru 1990 only - Jan 1 0:00 1:00 S
1306 Rule Peru 1990 only - Apr 1 0:00 0 -
1307 # IATA is ambiguous for 1993/1995; go with Shanks & Pottenger.
1308 Rule Peru 1994 only - Jan 1 0:00 1:00 S
1309 Rule Peru 1994 only - Apr 1 0:00 0 -
1310 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1311 Zone America/Lima -5:08:12 - LMT 1890
1312 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time?
1313 -5:00 Peru PE%sT # Peru Time
1315 # South Georgia
1316 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1317 Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken
1318 -2:00 - GST # South Georgia Time
1320 # South Sandwich Is
1321 # uninhabited; scientific personnel have wintered
1323 # Suriname
1324 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1325 Zone America/Paramaribo -3:40:40 - LMT 1911
1326 -3:40:52 - PMT 1935 # Paramaribo Mean Time
1327 -3:40:36 - PMT 1945 Oct # The capital moved?
1328 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time
1329 -3:30 - SRT 1984 Oct # Suriname Time
1330 -3:00 - SRT
1332 # Trinidad and Tobago
1333 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1334 Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2
1335 -4:00 - AST
1337 # Uruguay
1338 # From Paul Eggert (1993-11-18):
1339 # Uruguay wins the prize for the strangest peacetime manipulation of the rules.
1340 # From Shanks & Pottenger:
1341 # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1342 # Whitman gives 1923 Oct 1; go with Shanks & Pottenger.
1343 Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS
1344 Rule Uruguay 1924 1926 - Apr 1 0:00 0 -
1345 Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS
1346 Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS
1347 # Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman.
1348 Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 -
1349 Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS
1350 Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 -
1351 # Whitman gives 1937 Oct 3; go with Shanks & Pottenger.
1352 Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS
1353 # Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13,
1354 # and 1943 Apr 13 ``to present time''; go with Shanks & Pottenger.
1355 Rule Uruguay 1941 only - Aug 1 0:00 0:30 HS
1356 Rule Uruguay 1942 only - Jan 1 0:00 0 -
1357 Rule Uruguay 1942 only - Dec 14 0:00 1:00 S
1358 Rule Uruguay 1943 only - Mar 14 0:00 0 -
1359 Rule Uruguay 1959 only - May 24 0:00 1:00 S
1360 Rule Uruguay 1959 only - Nov 15 0:00 0 -
1361 Rule Uruguay 1960 only - Jan 17 0:00 1:00 S
1362 Rule Uruguay 1960 only - Mar 6 0:00 0 -
1363 Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S
1364 Rule Uruguay 1965 only - Sep 26 0:00 0 -
1365 Rule Uruguay 1966 1967 - Oct 31 0:00 0 -
1366 Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS
1367 Rule Uruguay 1968 1970 - Dec 2 0:00 0 -
1368 Rule Uruguay 1972 only - Apr 24 0:00 1:00 S
1369 Rule Uruguay 1972 only - Aug 15 0:00 0 -
1370 Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS
1371 Rule Uruguay 1974 only - Dec 22 0:00 1:00 S
1372 Rule Uruguay 1976 only - Oct 1 0:00 0 -
1373 Rule Uruguay 1977 only - Dec 4 0:00 1:00 S
1374 Rule Uruguay 1978 only - Apr 1 0:00 0 -
1375 Rule Uruguay 1979 only - Oct 1 0:00 1:00 S
1376 Rule Uruguay 1980 only - May 1 0:00 0 -
1377 Rule Uruguay 1987 only - Dec 14 0:00 1:00 S
1378 Rule Uruguay 1988 only - Mar 14 0:00 0 -
1379 Rule Uruguay 1988 only - Dec 11 0:00 1:00 S
1380 Rule Uruguay 1989 only - Mar 12 0:00 0 -
1381 Rule Uruguay 1989 only - Oct 29 0:00 1:00 S
1382 # Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2,
1383 # and that 1992/3's DST was from 10-25 to 03-01. Go with IATA.
1384 Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 -
1385 Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S
1386 Rule Uruguay 1992 only - Oct 18 0:00 1:00 S
1387 Rule Uruguay 1993 only - Feb 28 0:00 0 -
1388 # From Eduardo Cota (2004-09-20):
1389 # The uruguayan government has decreed a change in the local time....
1390 # http://www.presidencia.gub.uy/decretos/2004091502.htm
1391 Rule Uruguay 2004 only - Sep 19 0:00 1:00 S
1392 # From Steffen Thorsen (2005-03-11):
1393 # Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to
1394 # save energy ... it was postponed two weeks....
1395 # http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm
1396 Rule Uruguay 2005 only - Mar 27 2:00 0 -
1397 # From Eduardo Cota (2005-09-27):
1398 # http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF
1399 # This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at
1400 # 02:00 local time, official time in Uruguay will be at GMT -2.
1401 Rule Uruguay 2005 only - Oct 9 2:00 1:00 S
1402 Rule Uruguay 2006 only - Mar 12 2:00 0 -
1403 # From Jesper Norgaard Welen (2006-09-06):
1404 # http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF
1405 Rule Uruguay 2006 max - Oct Sun>=1 2:00 1:00 S
1406 Rule Uruguay 2007 max - Mar Sun>=8 2:00 0 -
1407 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1408 Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28
1409 -3:44:44 - MMT 1920 May 1 # Montevideo MT
1410 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time
1411 -3:00 Uruguay UY%sT
1413 # Venezuela
1414 #
1415 # From John Stainforth (2007-11-28):
1416 # ... the change for Venezuela originally expected for 2007-12-31 has
1417 # been brought forward to 2007-12-09. The official announcement was
1418 # published today in the "Gaceta Oficial de la Republica Bolivariana
1419 # de Venezuela, numero 38.819" (official document for all laws or
1420 # resolution publication)
1421 # http://www.globovision.com/news.php?nid=72208
1423 # Zone NAME GMTOFF RULES FORMAT [UNTIL]
1424 Zone America/Caracas -4:27:44 - LMT 1890
1425 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time?
1426 -4:30 - VET 1965 # Venezuela Time
1427 -4:00 - VET 2007 Dec 9 03:00
1428 -4:30 - VET