southamerica revision 121098
1# @(#)southamerica 7.49 2 3# This data is by no means authoritative; if you think you know better, 4# go ahead and edit the file (and please send any changes to 5# tz@elsie.nci.nih.gov for general use in the future). 6 7# From Paul Eggert <eggert@twinsun.com> (1999-07-07): 8# A good source for time zone historical data outside the U.S. is 9# Thomas G. Shanks, The International Atlas (5th edition), 10# San Diego: ACS Publications, Inc. (1999). 11# 12# Gwillim Law writes that a good source 13# for recent time zone data is the International Air Transport 14# Association's Standard Schedules Information Manual (IATA SSIM), 15# published semiannually. Law sent in several helpful summaries 16# of the IATA's data after 1990. 17# 18# Except where otherwise noted, Shanks is the source for entries through 1990, 19# and IATA SSIM is the source for entries after 1990. 20# 21# Earlier editions of these tables used the North American style (e.g. ARST and 22# ARDT for Argentine Standard and Daylight Time), but the following quote 23# suggests that it's better to use European style (e.g. ART and ARST). 24# I suggest the use of _Summer time_ instead of the more cumbersome 25# _daylight-saving time_. _Summer time_ seems to be in general use 26# in Europe and South America. 27# -- E O Cutler, _New York Times_ (1937-02-14), quoted in 28# H L Mencken, _The American Language: Supplement I_ (1960), p 466 29# 30# Earlier editions of these tables also used the North American style 31# for time zones in Brazil, but this was incorrect, as Brazilians say 32# "summer time". Reinaldo Goulart, a Sao Paulo businessman active in 33# the railroad sector, writes (1999-07-06): 34# The subject of time zones is currently a matter of discussion/debate in 35# Brazil. Let's say that "the Brasilia time" is considered the 36# "official time" because Brasilia is the capital city. 37# The other three time zones are called "Brasilia time "minus one" or 38# "plus one" or "plus two". As far as I know there is no such 39# name/designation as "Eastern Time" or "Central Time". 40# So I invented the following (English-language) abbreviations for now. 41# Corrections are welcome! 42# std dst 43# -2:00 FNT FNST Fernando de Noronha 44# -3:00 BRT BRST Brasilia 45# -4:00 AMT AMST Amazon 46# -5:00 ACT ACST Acre 47 48############################################################################### 49 50############################################################################### 51 52# Argentina 53 54# From Bob Devine (1988-01-28): 55# Argentina: first Sunday in October to first Sunday in April since 1976. 56# Double Summer time from 1969 to 1974. Switches at midnight. 57 58# From U. S. Naval Observatory (1988-01-199): 59# ARGENTINA 3 H BEHIND UTC 60 61# From Hernan G. Otero <hernan@isoft.com.ar> (1995-06-26): 62# I am sending modifications to the Argentine time zone table... 63# AR was chosen because they are the ISO letters that represent Argentina. 64 65# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 66Rule Arg 1930 only - Dec 1 0:00 1:00 S 67Rule Arg 1931 only - Apr 1 0:00 0 - 68Rule Arg 1931 only - Oct 15 0:00 1:00 S 69Rule Arg 1932 1940 - Mar 1 0:00 0 - 70Rule Arg 1932 1939 - Nov 1 0:00 1:00 S 71Rule Arg 1940 only - Jul 1 0:00 1:00 S 72Rule Arg 1941 only - Jun 15 0:00 0 - 73Rule Arg 1941 only - Oct 15 0:00 1:00 S 74Rule Arg 1943 only - Aug 1 0:00 0 - 75Rule Arg 1943 only - Oct 15 0:00 1:00 S 76Rule Arg 1946 only - Mar 1 0:00 0 - 77Rule Arg 1946 only - Oct 1 0:00 1:00 S 78Rule Arg 1963 only - Oct 1 0:00 0 - 79Rule Arg 1963 only - Dec 15 0:00 1:00 S 80Rule Arg 1964 1966 - Mar 1 0:00 0 - 81Rule Arg 1964 1966 - Oct 15 0:00 1:00 S 82Rule Arg 1967 only - Apr 2 0:00 0 - 83Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S 84Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 - 85Rule Arg 1974 only - Jan 23 0:00 1:00 S 86Rule Arg 1974 only - May 1 0:00 0 - 87Rule Arg 1988 only - Dec 1 0:00 1:00 S 88# 89# From Hernan G. Otero <hernan@isoft.com.ar> (1995-06-26): 90# These corrections were contributed by InterSoft Argentina S.A., 91# obtaining the data from the: 92# Talleres de Hidrografia Naval Argentina 93# (Argentine Naval Hydrography Institute) 94# 95# Shanks stops after 1992-03-01; go with Otero. 96Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 - 97Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S 98# 99# From Hernan G. Otero <hernan@isoft.com.ar> (1995-06-26): 100# From this moment on, the law that mandated the daylight saving 101# time corrections was derogated and no more modifications 102# to the time zones (for daylight saving) are now made. 103# 104# From Rives McDow (2000-01-10): 105# On October 3, 1999, 0:00 local, Argentina implemented daylight savings time, 106# which did not result in the switch of a time zone, as they stayed 9 hours 107# from the International Date Line. 108Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S 109Rule Arg 2000 only - Mar Sun>=1 0:00 0 - 110# 111# From Peter Gradelski via Steffen Thorsen (2000-03-01): 112# We just checked with our Sao Paulo office and they say the government of 113# Argentina decided not to become one of the countries that go on or off DST. 114# So Buenos Aires should be -3 hours from GMT at all times. 115# 116# From Fabian L. Arce Jofre <farcejofre@bigfoot.com> (2000-04-04): 117# The law that claimed DST for Argentina was derogated by President Fernando 118# de la Rua on March 2, 2000, because it would make people spend more energy 119# in the winter time, rather than less. The change took effect on March 3. 120# 121# From Mariano Absatz (2001-06-06): 122# one of the major newspapers here in Argentina said that the 1999 123# Timezone Law (which never was effectively applied) will (would?) be 124# in effect.... The article is at 125# http://ar.clarin.com/diario/2001-06-06/e-01701.htm 126# ... The Law itself is "Ley No 25155", sanctioned on 1999-08-25, enacted 127# 1999-09-17, and published 1999-09-21. The official publication is at: 128# http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF 129# Regretfully, you have to subscribe (and pay) for the on-line version.... 130# 131# (2001-06-12): 132# the timezone for Argentina will not change next Sunday. 133# Apparently it will do so on Sunday 24th.... 134# http://ar.clarin.com/diario/2001-06-12/s-03501.htm 135# 136# (2001-06-25): 137# Last Friday (yes, the last working day before the date of the change), the 138# Senate annulled the 1999 law that introduced the changes later postponed. 139# http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm 140# It remains the vote of the Deputies..., but it will be the same.... 141# This kind of things had always been done this way in Argentina. 142# We are still -03:00 all year round in all of the country. 143# 144# 145# From Paul Eggert (2002-01-22): 146# <a href="http://www.spicasc.net/horvera.html"> 147# Hora de verano para la Republica Argentina (2000-10-01) 148# </a> says that standard time in Argentina from 1894-10-31 149# to 1920-05-01 was -4:16:48.25. Go with this more-precise value 150# over Shanks. 151 152# Unless otherwise specified, data are from Shanks through 1992, from 153# the IATA otherwise. As noted below, Shanks says that 154# America/Cordoba split into 7 subregions during 1991/1992, but we 155# haven't verified this yet so for now we'll keep it a single region. 156# 157# Zone NAME GMTOFF RULES FORMAT [UNTIL] 158# 159# Buenos Aires (BA), Capital Federal (CF), Santa Cruz (SC), 160# Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF) 161Zone America/Buenos_Aires -3:53:48 - LMT 1894 Oct 31 162 -4:16:48 - CMT 1920 May # Cordoba Mean Time 163 -4:00 - ART 1930 Dec 164 -4:00 Arg AR%sT 1969 Oct 5 165 -3:00 Arg AR%sT 1999 Oct 3 166 -4:00 Arg AR%sT 2000 Mar 3 167 -3:00 - ART 168# 169# Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN), Chaco (CC), 170# Formosa (FM), Salta (SA), Tucuman (TM), Santiago del Estero (SE), 171# Cordoba (CB), La Rioja (LR), San Juan (SJ), San Luis (SL), La Pampa (LP), 172# Neuquen (NQ), Rio Negro (RN), Chubut (CH) 173# 174# Shanks also makes the following claims, which we haven't verified: 175# - Formosa switched to -3:00 on 1991-01-07. 176# - La Rioja and San Juan switched to -4:00 on 1991-03-01 177# and then to -3:00 on 1991-05-07. 178# - Misiones switched to -3:00 on 1990-12-29. 179# - Chaco switched to -3:00 on 1991-01-04. 180# - San Luis switched to -4:00 on 1990-03-14, then to -3:00 on 1990-10-15, 181# then to -4:00 on 1991-03-01, then to -3:00 on 1991-06-01. 182# - Santiago del Estero switched to -4:00 on 1991-04-01, 183# then to -3:00 on 1991-04-26. 184# If we need to add Zones for these areas, we may need to have a subdirectory 185# for Argentina, as e.g. "America/San_Luis" is too ambiguious. 186# 187Zone America/Cordoba -4:16:48 - LMT 1894 Oct 31 188 -4:16:48 - CMT 1920 May 189 -4:00 - ART 1930 Dec 190 -4:00 Arg AR%sT 1969 Oct 5 191 -3:00 Arg AR%sT 1991 Mar 3 192 -4:00 - WART 1991 Oct 20 193 -3:00 Arg AR%sT 1999 Oct 3 194 -4:00 Arg AR%sT 2000 Mar 3 195 -3:00 - ART 196# 197# Jujuy (JY) 198Zone America/Jujuy -4:21:12 - LMT 1894 Oct 31 199 -4:16:48 - CMT 1920 May 200 -4:00 - ART 1930 Dec 201 -4:00 Arg AR%sT 1969 Oct 5 202 -3:00 Arg AR%sT 1990 Mar 4 203 -4:00 - WART 1990 Oct 28 204 -4:00 1:00 WARST 1991 Mar 17 205 -4:00 - WART 1991 Oct 6 206 -3:00 1:00 ARST 1992 207 -3:00 Arg AR%sT 1999 Oct 3 208 -4:00 Arg AR%sT 2000 Mar 3 209 -3:00 - ART 210# 211# Catamarca (CT) 212Zone America/Catamarca -4:23:08 - LMT 1894 Oct 31 213 -4:16:48 - CMT 1920 May 214 -4:00 - ART 1930 Dec 215 -4:00 Arg AR%sT 1969 Oct 5 216 -3:00 Arg AR%sT 1991 Mar 3 217 -4:00 - WART 1991 Oct 20 218 -3:00 Arg AR%sT 1999 Oct 3 219 -4:00 Arg AR%sT 2000 Mar 3 220 -3:00 - ART 221# 222# Mendoza (MZ) 223Zone America/Mendoza -4:35:16 - LMT 1894 Oct 31 224 -4:16:48 - CMT 1920 May 225 -4:00 - ART 1930 Dec 226 -4:00 Arg AR%sT 1969 Oct 5 227 -3:00 Arg AR%sT 1990 Mar 4 228 -4:00 - WART 1990 Oct 15 229 -4:00 1:00 WARST 1991 Mar 1 230 -4:00 - WART 1991 Oct 15 231 -4:00 1:00 WARST 1992 Mar 1 232 -4:00 - WART 1992 Oct 18 233 -3:00 Arg AR%sT 1999 Oct 3 234 -4:00 Arg AR%sT 2000 Mar 3 235 -3:00 - ART 236 237# Aruba 238# Zone NAME GMTOFF RULES FORMAT [UNTIL] 239Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad 240 -4:30 - ANT 1965 # Netherlands Antilles Time 241 -4:00 - AST 242 243# Bolivia 244# Zone NAME GMTOFF RULES FORMAT [UNTIL] 245Zone America/La_Paz -4:32:36 - LMT 1890 246 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT 247 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST 248 -4:00 - BOT # Bolivia Time 249 250# Brazil 251 252# From Paul Eggert <eggert@twinsun.com> (1993-11-18): 253# The mayor of Rio recently attempted to change the time zone rules 254# just in his city, in order to leave more summer time for the tourist trade. 255# The rule change lasted only part of the day; 256# the federal government refused to follow the city's rules, and business 257# was in a chaos, so the mayor backed down that afternoon. 258 259# From IATA SSIM (1996-02): 260# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS), 261# Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ), 262# Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO), 263# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL]. 264# [The last three states are new to this issue of the IATA SSIM.] 265 266# From Gwillim Law (1996-10-07): 267# Geography, history (Tocantins was part of Goias until 1989), and other 268# sources of time zone information lead me to believe that AL, SE, and TO were 269# always in BR1, and so the only change was whether or not they observed DST.... 270# The earliest issue of the SSIM I have is 2/91. Each issue from then until 271# 9/95 says that DST is observed only in the ten states I quoted from 9/95, 272# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2 273# (UTC-4).... The other two time zones given for Brazil are BR3, which is 274# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is 275# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's 276# become part of the state of Pernambuco). The boundary between BR1 and BR2 277# has never been clearly stated. They've simply been called East and West. 278# However, some conclusions can be drawn from another IATA manual: the Airline 279# Coding Directory, which lists close to 400 airports in Brazil. For each 280# airport it gives a time zone which is coded to the SSIM. From that 281# information, I'm led to conclude that the states of Amapa (AP), Ceara (CE), 282# Maranhao (MA), Paraiba (PR), Pernambuco (PE), Piaui (PI), and Rio Grande do 283# Norte (RN), and the eastern part of Para (PA) are all in BR1 without DST. 284 285# From Marcos Tadeu (1998-09-27): 286# <a href="http://pcdsh01.on.br/verao1.html"> 287# Brazilian official page 288# </a> 289 290# From Jesper Norgaard (2000-11-03): 291# [For an official list of which regions in Brazil use which time zones, see:] 292# http://pcdsh01.on.br/Fusbr.htm 293# http://pcdsh01.on.br/Fusbrhv.htm 294 295# From Celso Doria via David Madeo (2002-10-09): 296# The reason for the delay this year has to do with elections in Brazil. 297# 298# Unlike in the United States, elections in Brazil are 100% computerized and 299# the results are known almost immediately. Yesterday, it was the first 300# round of the elections when 115 million Brazilians voted for President, 301# Governor, Senators, Federal Deputies, and State Deputies. Nobody is 302# counting (or re-counting) votes anymore and we know there will be a second 303# round for the Presidency and also for some Governors. The 2nd round will 304# take place on October 27th. 305# 306# The reason why the DST will only begin November 3rd is that the thousands 307# of electoral machines used cannot have their time changed, and since the 308# Constitution says the elections must begin at 8:00 AM and end at 5:00 PM, 309# the Government decided to postpone DST, instead of changing the Constitution 310# (maybe, for the next elections, it will be possible to change the clock)... 311 312# From Paul Eggert (2002-10-10): 313# The official decrees referenced below are mostly taken from 314# <a href="http://pcdsh01.on.br/DecHV.html"> 315# Decretos sobre o Horario de Verao no Brasil 316# </a> (2001-09-20, in Portuguese). 317# The official site for all decrees, including those not related to time, is 318# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/principal_ano.htm"> 319# Presidencia da Republica, Subchefia para Assuntos Juridicos, Decretos 320# </a> (in Portuguese). 321 322# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 323# Decree <a href="http://pcdsh01.on.br/HV20466.htm">20,466</a> (1931-10-01) 324# Decree <a href="http://pcdsh01.on.br/HV21896.htm">21,896</a> (1932-01-10) 325Rule Brazil 1931 only - Oct 3 11:00 1:00 S 326Rule Brazil 1932 1933 - Apr 1 0:00 0 - 327Rule Brazil 1932 only - Oct 3 0:00 1:00 S 328# Decree <a href="http://pcdsh01.on.br/HV23195.htm">23,195</a> (1933-10-10) 329# revoked DST. 330# Decree <a href="http://pcdsh01.on.br/HV27496.htm">27,496</a> (1949-11-24) 331# Decree <a href="http://pcdsh01.on.br/HV27998.htm">27,998</a> (1950-04-13) 332Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S 333Rule Brazil 1950 only - Apr 16 1:00 0 - 334Rule Brazil 1951 1952 - Apr 1 0:00 0 - 335# Decree <a href="http://pcdsh01.on.br/HV32308.htm">32,308</a> (1953-02-24) 336Rule Brazil 1953 only - Mar 1 0:00 0 - 337# Decree <a href="http://pcdsh01.on.br/HV34724.htm">34,724</a> (1953-11-30) 338# revoked DST. 339# Decree <a href="http://pcdsh01.on.br/HV52700.htm">52,700</a> (1963-10-18) 340# established DST from 1963-10-23 00:00 to 1964-02-29 00:00 341# in SP, RJ, GB, MG, ES, due to the prolongation of the drought. 342# Decree <a href="http://pcdsh01.on.br/HV53071.htm">53,071</a> (1963-12-03) 343# extended the above decree to all of the national territory on 12-09. 344Rule Brazil 1963 only - Dec 9 0:00 1:00 S 345# Decree <a href="http://pcdsh01.on.br/HV53604.htm">53,604</a> (1964-02-25) 346# extended summer time by one day to 1964-03-01 00:00 (start of school). 347Rule Brazil 1964 only - Mar 1 0:00 0 - 348# Decree <a href="http://pcdsh01.on.br/HV55639.htm">55,639</a> (1965-01-27) 349Rule Brazil 1965 only - Jan 31 0:00 1:00 S 350Rule Brazil 1965 only - Mar 31 0:00 0 - 351# Decree <a href="http://pcdsh01.on.br/HV57303.htm">57,303</a> (1965-11-22) 352Rule Brazil 1965 only - Dec 1 0:00 1:00 S 353# Decree <a href="http://pcdsh01.on.br/HV57843.htm">57,843</a> (1966-02-18) 354Rule Brazil 1966 1968 - Mar 1 0:00 0 - 355Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S 356# Decree <a href="http://pcdsh01.on.br/HV63429.htm">63,429</a> (1968-10-15) 357# revoked DST. 358# Decree <a href="http://pcdsh01.on.br/HV91698.htm">91,698</a> (1985-09-27) 359Rule Brazil 1985 only - Nov 2 0:00 1:00 S 360# Decree 92,310 (1986-01-21) 361# Decree 92,463 (1986-03-13) 362Rule Brazil 1986 only - Mar 15 0:00 0 - 363# Decree 93,316 (1986-10-01) 364Rule Brazil 1986 only - Oct 25 0:00 1:00 S 365Rule Brazil 1987 only - Feb 14 0:00 0 - 366# Decree <a href="http://pcdsh01.on.br/HV94922.htm">94,922</a> (1987-09-22) 367Rule Brazil 1987 only - Oct 25 0:00 1:00 S 368Rule Brazil 1988 only - Feb 7 0:00 0 - 369# Decree <a href="http://pcdsh01.on.br/HV96676.htm">96,676</a> (1988-09-12) 370# except for the states of AC, AM, PA, RR, RO, and AP (then a territory) 371Rule Brazil 1988 only - Oct 16 0:00 1:00 S 372Rule Brazil 1989 only - Jan 29 0:00 0 - 373# Decree <a href="http://pcdsh01.on.br/HV98077.htm">98,077</a> (1989-08-21) 374# with the same exceptions 375Rule Brazil 1989 only - Oct 15 0:00 1:00 S 376Rule Brazil 1990 only - Feb 11 0:00 0 - 377# Decree <a href="http://pcdsh01.on.br/HV99530.htm">99,530</a> (1990-09-17) 378# adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF. 379# Decree 99,629 (1990-10-19) adds BA, MT. 380Rule Brazil 1990 only - Oct 21 0:00 1:00 S 381Rule Brazil 1991 only - Feb 17 0:00 0 - 382# <a href="http://pcdsh01.on.br/HV1991.htm">Unnumbered decree</a> (1991-09-25) 383# adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF. 384Rule Brazil 1991 only - Oct 20 0:00 1:00 S 385Rule Brazil 1992 only - Feb 9 0:00 0 - 386# <a href="http://pcdsh01.on.br/HV1992.htm">Unnumbered decree</a> (1992-10-16) 387# adopted by same states. 388Rule Brazil 1992 only - Oct 25 0:00 1:00 S 389Rule Brazil 1993 only - Jan 31 0:00 0 - 390# Decree <a href="http://pcdsh01.on.br/HV942.htm">942</a> (1993-09-28) 391# adopted by same states, plus AM. 392# Decree <a href="http://pcdsh01.on.br/HV1252.htm">1,252</a> (1994-09-22) 393# adopted by same states, minus AM. 394# Decree <a href="http://pcdsh01.on.br/HV1636.htm">1,636</a> (1995-09-14) 395# adopted by same states, plus TO. 396# Decree <a href="http://pcdsh01.on.br/HV1674.htm">1,674</a> (1995-10-13) 397# adds AL, SE. 398Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S 399Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 - 400Rule Brazil 1996 only - Feb 11 0:00 0 - 401# Decree <a href="http://pcdsh01.on.br/HV2000.htm">2,000</a> (1996-09-04) 402# adopted by same states, minus AL, SE. 403Rule Brazil 1996 only - Oct 6 0:00 1:00 S 404Rule Brazil 1997 only - Feb 16 0:00 0 - 405# From Daniel C. Sobral <dcs@gns.com.br> (1998-02-12): 406# In 1997, the DS began on October 6. The stated reason was that 407# because international television networks ignored Brazil's policy on DS, 408# they bought the wrong times on satellite for coverage of Pope's visit. 409# This year, the ending date of DS was postponed to March 1 410# to help dealing with the shortages of electric power. 411# 412# From Paul Eggert (1998-02-25): 413# <a href="http://churchnet.ucsm.ac.uk/news/files2/news165.htm"> 414# Brazil Prepares for Papal Visit 415# </a>, 416# Church Net UK (1997-10-02). 417# 418# Decree 2,317 (1997-09-04), adopted by same states. 419Rule Brazil 1997 only - Oct 6 0:00 1:00 S 420# Decree <a href="http://pcdsh01.on.br/figuras/HV2495.JPG">2,495</a> 421# (1998-02-10) 422Rule Brazil 1998 only - Mar 1 0:00 0 - 423# Decree <a href="http://pcdsh01.on.br/figuras/Hv98.jpg">2,780</a> (1998-09-11) 424# adopted by the same states as before. 425Rule Brazil 1998 only - Oct 11 0:00 1:00 S 426Rule Brazil 1999 only - Feb 21 0:00 0 - 427# Decree <a href="http://pcdsh01.on.br/figuras/HV3150.gif">3,150</a> 428# (1999-08-23) adopted by same states. 429# Decree <a href="http://pcdsh01.on.br/DecHV99.gif">3,188</a> (1999-09-30) 430# adds SE, AL, PB, PE, RN, CE, PI, MA and RR. 431Rule Brazil 1999 only - Oct 3 0:00 1:00 S 432Rule Brazil 2000 only - Feb 27 0:00 0 - 433# Decree <a href="http://pcdsh01.on.br/DEC3592.htm">3,592</a> (2000-09-06) 434# adopted by the same states as before. 435# Decree <a href="http://pcdsh01.on.br/Dec3630.jpg">3,630</a> (2000-10-13) 436# repeals DST in PE and RR, effective 2000-10-15 00:00. 437# Decree <a href="http://pcdsh01.on.br/Dec3632.jpg">3,632</a> (2000-10-17) 438# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00. 439# Decree <a href="http://pcdsh01.on.br/figuras/HV3916.gif">3,916</a> 440# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE. 441Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S 442Rule Brazil 2001 max - Feb Sun>=15 0:00 0 - 443# Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE. 444# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm"></a> 445Rule Brazil 2002 only - Nov 3 0:00 1:00 S 446# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO. 447# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm"></a> 448Rule Brazil 2003 max - Oct Sun>=15 0:00 1:00 S 449# The latest ruleset listed above says that the following states observe DST: 450# DF, ES, GO, MG, MS, PR, RJ, RS, SC, SP. 451# 452# For dates after mid-2004, the above rules with TO="max" are guesses 453# and are quite possibly wrong, but are more likely than no DST at all. 454 455 456# Zone NAME GMTOFF RULES FORMAT [UNTIL] 457# 458# Atlantic islands: Fernando de Noronha, Trindade, Martin Vaz, 459# Atol das Rocas, and Penedos de Sao Pedro e Sao Paulo 460Zone America/Noronha -2:09:40 - LMT 1914 461 -2:00 Brazil FN%sT 1990 Sep 17 462 -2:00 - FNT 463# 464# Amapa (AP), east Para (PA) 465# East Para includes Belem, Maraba, Serra Norte, and Sao Felix do Xingu. 466# The division between east and west Para is the river Xingu. 467# In the north a very small part from the river Javary (now Jari I guess, 468# the border with Amapa) to the Amazon, then to the Xingu. 469Zone America/Belem -3:13:56 - LMT 1914 470 -3:00 Brazil BR%sT 1988 Sep 12 471 -3:00 - BRT 472# 473# Maranhao (MA), Piaui (PI), Ceara (CE), Rio Grande do Norte (RN), 474# Paraiba (PB) 475Zone America/Fortaleza -2:34:00 - LMT 1914 476 -3:00 Brazil BR%sT 1990 Sep 17 477 -3:00 - BRT 1999 Sep 30 478 -3:00 Brazil BR%sT 2000 Oct 22 479 -3:00 - BRT 2001 Sep 13 480 -3:00 Brazil BR%sT 2002 Oct 1 481 -3:00 - BRT 482# 483# Pernambuco (PE) (except Atlantic islands) 484Zone America/Recife -2:19:36 - LMT 1914 485 -3:00 Brazil BR%sT 1990 Sep 17 486 -3:00 - BRT 1999 Sep 30 487 -3:00 Brazil BR%sT 2000 Oct 15 488 -3:00 - BRT 2001 Sep 13 489 -3:00 Brazil BR%sT 2002 Oct 1 490 -3:00 - BRT 491# 492# Tocantins (TO) 493Zone America/Araguaina -3:12:48 - LMT 1914 494 -3:00 Brazil BR%sT 1990 Sep 17 495 -3:00 - BRT 1995 Sep 14 496 -3:00 Brazil BR%sT 2003 Sep 24 497 -3:00 - BRT 498# 499# Alagoas (AL), Sergipe (SE) 500Zone America/Maceio -2:22:52 - LMT 1914 501 -3:00 Brazil BR%sT 1990 Sep 17 502 -3:00 - BRT 1995 Oct 13 503 -3:00 Brazil BR%sT 1996 Sep 4 504 -3:00 - BRT 1999 Sep 30 505 -3:00 Brazil BR%sT 2000 Oct 22 506 -3:00 - BRT 2001 Sep 13 507 -3:00 Brazil BR%sT 2002 Oct 1 508 -3:00 - BRT 509# 510# Bahia (BA) 511# There are too many Salvadors elsewhere, so use America/Bahia instead 512# of America/Salvador. 513Zone America/Bahia -2:34:04 - LMT 1914 514 -3:00 Brazil BR%sT 2003 Sep 24 515 -3:00 - BRT 516# 517# Goias (GO), Distrito Federal (DF), Minas Gerais (MG), 518# Espirito Santo (ES), Rio de Janeiro (RJ), Sao Paulo (SP), Parana (PR), 519# Santa Catarina (SC), Rio Grande do Sul (RS) 520Zone America/Sao_Paulo -3:06:28 - LMT 1914 521 -3:00 Brazil BR%sT 1963 Oct 23 00:00 522 -3:00 1:00 BRST 1964 523 -3:00 Brazil BR%sT 524# 525# Mato Grosso do Sul (MS) 526Zone America/Campo_Grande -3:38:28 - LMT 1914 527 -4:00 Brazil AM%sT 528# 529# Mato Grosso (MT) 530Zone America/Cuiaba -3:44:20 - LMT 1914 531 -4:00 Brazil AM%sT 2003 Sep 24 532 -4:00 - AMT 533# 534# west Para (PA), Rondonia (RO) 535# West Para includes Altamira, Oribidos, Prainha, Oriximina, and Santarem. 536Zone America/Porto_Velho -4:15:36 - LMT 1914 537 -4:00 Brazil AM%sT 1988 Sep 12 538 -4:00 - AMT 539# 540# Roraima (RR) 541Zone America/Boa_Vista -4:02:40 - LMT 1914 542 -4:00 Brazil AM%sT 1988 Sep 12 543 -4:00 - AMT 1999 Sep 30 544 -4:00 Brazil AM%sT 2000 Oct 15 545 -4:00 - AMT 546# 547# east Amazonas (AM): Boca do Acre, Jutai, Manaus, Floriano Peixoto 548# The great circle line from Tabatinga to Porto Acre divides 549# east from west Amazonas. 550Zone America/Manaus -4:00:04 - LMT 1914 551 -4:00 Brazil AM%sT 1988 Sep 12 552 -4:00 - AMT 1993 Sep 28 553 -4:00 Brazil AM%sT 1994 Sep 22 554 -4:00 - AMT 555# 556# west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant, 557# Eirunepe, Envira, Ipixuna 558Zone America/Eirunepe -4:39:28 - LMT 1914 559 -5:00 Brazil AC%sT 1988 Sep 12 560 -5:00 - ACT 1993 Sep 28 561 -5:00 Brazil AC%sT 1994 Sep 22 562 -5:00 - ACT 563# 564# Acre (AC) 565Zone America/Rio_Branco -4:31:12 - LMT 1914 566 -5:00 Brazil AC%sT 1988 Sep 12 567 -5:00 - ACT 568 569 570# Chile 571 572# From Eduardo Krell (1995-10-19): 573# The law says to switch to DST at midnight [24:00] on the second SATURDAY 574# of October.... The law is the same for March and October. 575# (1998-09-29): 576# Because of the drought this year, the government decided to go into 577# DST earlier (saturday 9/26 at 24:00). This is a one-time change only ... 578# (unless there's another dry season next year, I guess). 579 580# From Julio I. Pacheco Troncoso (1999-03-18): 581# Because of the same drought, the government decided to end DST later, 582# on April 3, (one-time change). 583 584# From Gwillim Law (2001-05-04): 585# I came across another article in "La Tercera" about Chilean DST. 586# <http://www.tercera.cl/diario/2000/10/13/t-extras.html> 587# It clearly confirms my earlier suggestion, that DST begins at 22:00 588# on Easter Island.... But it also seems to be saying that the 589# observance of DST in Chile began in 1966, rather than 1969 as 590# ... [Shanks] has it.... 591# 592# My translation: 593# 594# "The Chilean Army has announced that summer time will begin tomorrow, 595# Saturday, October 14 in continental Chile, insular Chile, and 596# Antarctica, as provided by Supreme Decree 25 of January 11, 1966. 597# By the preceding, official time in continental Chile and Chilean 598# Antarctic, and official time in Western Insular Chile, which applies 599# to Easter Island and Sala y Gomez Island, will be set forward at 600# midnight and at 22:00, respectively, by 20 minutes." 601 602# From Paul Eggert (2001-05-04): 603# Go with this article in preference to Shanks's 1969 date for modern DST. 604# Assume this rule has been used since DST was introduced in the islands. 605 606# From Paul Eggert (2002-10-24): 607# <http://www.shoa.cl/shoa/faqhoraoficial.htm> gives many details that 608# disagree with the following table, but we haven't had time to compare them. 609 610# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 611Rule Chile 1918 only - Sep 1 0:00 1:00 S 612Rule Chile 1919 only - Jul 2 0:00 0 - 613Rule Chile 1927 1931 - Sep 1 0:00 1:00 S 614Rule Chile 1928 1932 - Apr 1 0:00 0 - 615Rule Chile 1966 1997 - Oct Sun>=9 4:00u 1:00 S 616Rule Chile 1967 1998 - Mar Sun>=9 3:00u 0 - 617Rule Chile 1998 only - Sep 27 4:00u 1:00 S 618Rule Chile 1999 only - Apr 4 3:00u 0 - 619Rule Chile 1999 max - Oct Sun>=9 4:00u 1:00 S 620Rule Chile 2000 max - Mar Sun>=9 3:00u 0 - 621# IATA SSIM anomalies: (1990-09) says 1990-09-16; (1992-02) says 1992-03-14; 622# (1996-09) says 1998-03-08. Ignore these. 623# Zone NAME GMTOFF RULES FORMAT [UNTIL] 624Zone America/Santiago -4:42:40 - LMT 1890 625 -4:42:40 - SMT 1910 # Santiago Mean Time 626 -5:00 Chile CL%sT 1932 Sep # Chile Time 627 -4:00 Chile CL%sT 628Zone Pacific/Easter -7:17:28 - LMT 1890 # Mataveri 629 -7:17:28 - MMT 1932 Sep # Mataveri Mean Time 630 -7:00 Chile EAS%sT 1982 Mar 14 # Easter I Time 631 -6:00 Chile EAS%sT 632# 633# Sala y Gomez Island is like Pacific/Easter. 634# Other Chilean locations, including Juan Fernandez Is, San Ambrosio, 635# San Felix, and Antarctic bases, are like America/Santiago. 636 637# Colombia 638# Shanks specifies 24:00 for 1992 transition times; go with IATA, 639# as it seems implausible to change clocks at midnight New Year's Eve. 640# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 641Rule CO 1992 only - May 2 0:00 1:00 S 642Rule CO 1992 only - Dec 31 0:00 0 - 643# Zone NAME GMTOFF RULES FORMAT [UNTIL] 644Zone America/Bogota -4:56:20 - LMT 1884 Mar 13 645 -4:56:20 - BMT 1914 Nov 23 # Bogota Mean Time 646 -5:00 CO CO%sT # Colombia Time 647# Malpelo, Providencia, San Andres 648# no information; probably like America/Bogota 649 650# Curacao 651# Shanks says that Bottom and Oranjestad have been at -4:00 since 652# standard time was introduced on 1912-03-02; and that Kralendijk and Rincon 653# used Kralendijk Mean Time (-4:33:08) from 1912-02-02 to 1965-01-01. 654# This all predates our 1970 cutoff, though. 655# Zone NAME GMTOFF RULES FORMAT [UNTIL] 656Zone America/Curacao -4:35:44 - LMT 1912 Feb 12 # Willemstad 657 -4:30 - ANT 1965 # Netherlands Antilles Time 658 -4:00 - AST 659 660# Ecuador 661# Zone NAME GMTOFF RULES FORMAT [UNTIL] 662Zone America/Guayaquil -5:19:20 - LMT 1890 663 -5:14:00 - QMT 1931 # Quito Mean Time 664 -5:00 - ECT # Ecuador Time 665Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno 666 -5:00 - ECT 1986 667 -6:00 - GALT # Galapagos Time 668 669# Falklands 670 671# From Paul Eggert (2001-03-05): 672# Between 1990 and 2000 inclusive, Shanks and the IATA agree except 673# the IATA gives 1996-09-08. Go with Shanks. 674 675# From Falkland Islands Government Office, London (2001-01-22) 676# via Jesper Norgaard: 677# ... the clocks revert back to Local Mean Time at 2 am on Sunday 15 678# April 2001 and advance one hour to summer time at 2 am on Sunday 2 679# September. It is anticipated that the clocks will revert back at 2 680# am on Sunday 21 April 2002 and advance to summer time at 2 am on 681# Sunday 1 September. 682 683# From Rives McDow (2001-02-13): 684# 685# I have communicated several times with people there, and the last 686# time I had communications that was helpful was in 1998. Here is 687# what was said then: 688# 689# "The general rule was that Stanley used daylight saving and the Camp 690# did not. However for various reasons many people in the Camp have 691# started to use daylight saving (known locally as 'Stanley Time') 692# There is no rule as to who uses daylight saving - it is a matter of 693# personal choice and so it is impossible to draw a map showing who 694# uses it and who does not. Any list would be out of date as soon as 695# it was produced. This year daylight saving ended on April 18/19th 696# and started again on September 12/13th. I do not know what the rule 697# is, but can find out if you like. We do not change at the same time 698# as UK or Chile." 699# 700# I did have in my notes that the rule was "Second Saturday in Sep at 701# 0:00 until third Saturday in Apr at 0:00". I think that this does 702# not agree in some cases with Shanks; is this true? 703# 704# Also, there is no mention in the list that some areas in the 705# Falklands do not use DST. I have found in my communications there 706# that these areas are on the western half of East Falkland and all of 707# West Falkland. Stanley is the only place that consistently observes 708# DST. Again, as in other places in the world, the farmers don't like 709# it. West Falkland is almost entirely sheep farmers. 710# 711# I know one lady there that keeps a list of which farm keeps DST and 712# which doesn't each year. She runs a shop in Stanley, and says that 713# the list changes each year. She uses it to communicate to her 714# customers, catching them when they are home for lunch or dinner. 715 716# From Paul Eggert (2001-03-05): 717# For now, we'll just record the time in Stanley, since we have no 718# better info. 719 720# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 721Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S 722Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 - 723Rule Falk 1939 only - Oct 1 0:00 1:00 S 724Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S 725Rule Falk 1943 only - Jan 1 0:00 0 - 726Rule Falk 1983 only - Sep lastSun 0:00 1:00 S 727Rule Falk 1984 1985 - Apr lastSun 0:00 0 - 728Rule Falk 1984 only - Sep 16 0:00 1:00 S 729Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S 730Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 - 731Rule Falk 2001 max - Apr Sun>=15 2:00 0 - 732Rule Falk 2001 max - Sep Sun>=1 2:00 1:00 S 733# Zone NAME GMTOFF RULES FORMAT [UNTIL] 734Zone Atlantic/Stanley -3:51:24 - LMT 1890 735 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time 736 -4:00 Falk FK%sT 1983 May # Falkland Is Time 737 -3:00 Falk FK%sT 1985 Sep 15 738 -4:00 Falk FK%sT 739 740# French Guiana 741# Zone NAME GMTOFF RULES FORMAT [UNTIL] 742Zone America/Cayenne -3:29:20 - LMT 1911 Jul 743 -4:00 - GFT 1967 Oct # French Guiana Time 744 -3:00 - GFT 745 746# Guyana 747# Zone NAME GMTOFF RULES FORMAT [UNTIL] 748Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown 749 -3:45 - GBGT 1966 May 26 # Br Guiana Time 750 -3:45 - GYT 1975 Jul 31 # Guyana Time 751 -3:00 - GYT 1991 752# IATA SSIM (1996-06) says -4:00. Assume a 1991 switch. 753 -4:00 - GYT 754 755# Paraguay 756# From Paul Eggert (1999-10-29): 757# Shanks (1999) says that spring transitions are from 01:00 -> 02:00, 758# and autumn transitions are from 00:00 -> 23:00. Go with earlier 759# editions of Shanks, and with the IATA, who say transitions occur at 00:00. 760# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 761Rule Para 1975 1988 - Oct 1 0:00 1:00 S 762Rule Para 1975 1978 - Mar 1 0:00 0 - 763Rule Para 1979 1991 - Apr 1 0:00 0 - 764Rule Para 1989 only - Oct 22 0:00 1:00 S 765Rule Para 1990 only - Oct 1 0:00 1:00 S 766Rule Para 1991 only - Oct 6 0:00 1:00 S 767Rule Para 1992 only - Mar 1 0:00 0 - 768Rule Para 1992 only - Oct 5 0:00 1:00 S 769Rule Para 1993 only - Mar 31 0:00 0 - 770Rule Para 1993 1995 - Oct 1 0:00 1:00 S 771Rule Para 1994 1995 - Feb lastSun 0:00 0 - 772Rule Para 1996 only - Mar 1 0:00 0 - 773# IATA SSIM (2000-02) says 1999-10-10; ignore this for now. 774# From Steffen Thorsen (2000-10-02): 775# I have three independent reports that Paraguay changed to DST this Sunday 776# (10-01). 777# 778# Translated by Gwillim Law (2001-02-27) from 779# <a href="http://www.diarionoticias.com.py/011000/nacional/naciona1.htm"> 780# Noticias, a daily paper in Asuncion, Paraguay (2000-10-01) 781# </a>: 782# Starting at 0:00 today, the clock will be set forward 60 minutes, in 783# fulfillment of Decree No. 7,273 of the Executive Power.... The time change 784# system has been operating for several years. Formerly there was a separate 785# decree each year; the new law has the same effect, but permanently. Every 786# year, the time will change on the first Sunday of October; likewise, the 787# clock will be set back on the first Sunday of March. 788# 789# From Jesper Norgaard (2001-03-06) [an official URL saying similar things]: 790# http://gateway.abc.com.py:8000/pub/pag04.mbr/artic?FHA=2001-03-03-02.24.52.900592 791# 792Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S 793# IATA SSIM (1997-09) says Mar 1; go with Shanks. 794Rule Para 1997 only - Feb lastSun 0:00 0 - 795# Shanks says 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but 796# (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27). 797Rule Para 1998 2001 - Mar Sun>=1 0:00 0 - 798# From Rives McDow (2002-02-28): 799# A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the 800# dst method to be from the first Sunday in September to the first Sunday in 801# April. 802Rule Para 2002 max - Apr Sun>=1 0:00 0 - 803Rule Para 2002 max - Sep Sun>=1 0:00 1:00 S 804 805 806# Zone NAME GMTOFF RULES FORMAT [UNTIL] 807Zone America/Asuncion -3:50:40 - LMT 1890 808 -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time 809 -4:00 - PYT 1972 Oct # Paraguay Time 810 -3:00 - PYT 1974 Apr 811 -4:00 Para PY%sT 812 813# Peru 814# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 815Rule Peru 1938 only - Jan 1 0:00 1:00 S 816Rule Peru 1938 only - Apr 1 0:00 0 - 817Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S 818Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 - 819Rule Peru 1987 only - Jan 1 0:00 1:00 S 820Rule Peru 1987 only - Apr 1 0:00 0 - 821Rule Peru 1990 only - Jan 1 0:00 1:00 S 822Rule Peru 1990 only - Apr 1 0:00 0 - 823# IATA is ambiguous for 1993/1995; go with Shanks. 824Rule Peru 1994 only - Jan 1 0:00 1:00 S 825Rule Peru 1994 only - Apr 1 0:00 0 - 826# Zone NAME GMTOFF RULES FORMAT [UNTIL] 827Zone America/Lima -5:08:12 - LMT 1890 828 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time? 829 -5:00 Peru PE%sT # Peru Time 830 831# South Georgia 832# Zone NAME GMTOFF RULES FORMAT [UNTIL] 833Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken 834 -2:00 - GST # South Georgia Time 835 836# South Sandwich Is 837# uninhabited; scientific personnel have wintered 838 839# Suriname 840# Zone NAME GMTOFF RULES FORMAT [UNTIL] 841Zone America/Paramaribo -3:40:40 - LMT 1911 842 -3:40:52 - PMT 1935 # Paramaribo Mean Time 843 -3:40:36 - PMT 1945 Oct # The capital moved? 844 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time 845 -3:30 - SRT 1984 Oct # Suriname Time 846 -3:00 - SRT 847 848# Trinidad and Tobago 849# Zone NAME GMTOFF RULES FORMAT [UNTIL] 850Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2 851 -4:00 - AST 852 853# Uruguay 854# From Paul Eggert <eggert@twinsun.com> (1993-11-18): 855# Uruguay wins the prize for the strangest peacetime manipulation of the rules. 856# From Shanks: 857# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 858# Whitman gives 1923 Oct 1; go with Shanks. 859Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS 860Rule Uruguay 1924 1926 - Apr 1 0:00 0 - 861Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS 862Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS 863# Shanks gives 1935 Apr 1 0:00 and 1936 Mar 30 0:00; go with Whitman. 864Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 - 865Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS 866Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 - 867# Whitman gives 1937 Oct 3; go with Shanks. 868Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS 869# Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13, 870# and 1943 Apr 13 ``to present time''; go with Shanks. 871Rule Uruguay 1941 only - Aug 1 0:00 0 - 872Rule Uruguay 1942 only - Jan 1 0:00 0:30 HS 873Rule Uruguay 1942 only - Dec 14 0:00 1:00 S 874Rule Uruguay 1943 only - Mar 14 0:00 0 - 875Rule Uruguay 1959 only - May 24 0:00 1:00 S 876Rule Uruguay 1959 only - Nov 15 0:00 0 - 877Rule Uruguay 1960 only - Jan 17 0:00 1:00 S 878Rule Uruguay 1960 only - Mar 6 0:00 0 - 879Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S 880Rule Uruguay 1965 only - Sep 26 0:00 0 - 881Rule Uruguay 1966 1967 - Oct 31 0:00 0 - 882Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS 883Rule Uruguay 1968 1970 - Dec 2 0:00 0 - 884Rule Uruguay 1972 only - Apr 24 0:00 1:00 S 885Rule Uruguay 1972 only - Aug 15 0:00 0 - 886Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS 887Rule Uruguay 1974 only - Dec 22 0:00 1:00 S 888Rule Uruguay 1976 only - Oct 1 0:00 0 - 889Rule Uruguay 1977 only - Dec 4 0:00 1:00 S 890Rule Uruguay 1978 only - Apr 1 0:00 0 - 891Rule Uruguay 1979 only - Oct 1 0:00 1:00 S 892Rule Uruguay 1980 only - May 1 0:00 0 - 893Rule Uruguay 1987 only - Dec 14 0:00 1:00 S 894Rule Uruguay 1988 only - Mar 14 0:00 0 - 895Rule Uruguay 1988 only - Dec 11 0:00 1:00 S 896Rule Uruguay 1989 only - Mar 12 0:00 0 - 897Rule Uruguay 1989 only - Oct 29 0:00 1:00 S 898# Shanks says no DST was observed in 1990/1 and 1991/2, 899# and that 1992/3's DST was from 10-25 to 03-01. Go with IATA. 900Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 - 901Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S 902Rule Uruguay 1992 only - Oct 18 0:00 1:00 S 903Rule Uruguay 1993 only - Feb 28 0:00 0 - 904# Zone NAME GMTOFF RULES FORMAT [UNTIL] 905Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28 906 -3:44:44 - MMT 1920 May 1 # Montevideo MT 907 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time 908 -3:00 Uruguay UY%sT 909 910# Venezuela 911# Zone NAME GMTOFF RULES FORMAT [UNTIL] 912Zone America/Caracas -4:27:44 - LMT 1890 913 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time? 914 -4:30 - VET 1965 # Venezuela Time 915 -4:00 - VET 916