1# @(#)northamerica 7.52 |
2# also includes Central America and the Caribbean 3 |
4# $FreeBSD: head/share/zoneinfo/northamerica 64499 2000-08-10 19:36:46Z wollman $ 5 |
6# This data is by no means authoritative; if you think you know better, 7# go ahead and edit the file (and please send any changes to 8# tz@elsie.nci.nih.gov for general use in the future). 9 10# From Paul Eggert <eggert@twinsun.com> (1999-03-22): 11# A reliable and entertaining source about time zones is 12# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). 13 --- 985 unchanged lines hidden (view full) --- 999 -9:00 NT_YK Y%sT 1973 Oct 28 0:00 1000 -8:00 NT_YK P%sT 1001 1002 1003############################################################################### 1004 1005# Mexico 1006 |
1007# Gwillim Law reports this source for daylight saving time in Mexico: 1008# <a href="http://www.spin.com.mx/verano/"> 1009# Daylight saving time * SPIN-Internet (in Spanish) 1010# </a> 1011# Law (2000-03-09) translates it as follows: |
1012# |
1013# Standard time effective in Mexico takes its origin in the 1014# presidential decree of April 24, 1942. The time of the 120th 1015# meridian applies to the state of Baja California; of the 105th 1016# meridian to the states of Baja California Sur, Sonora, Sinaloa, and 1017# Nayarit; and the time of the 90th meridian to the rest of the 1018# country. |
1019# |
1020# In the country, there have been several attempts made to adapt 1021# standard time with the object of arriving at a better use of 1022# daylight for social and economic activities. In December, 1981 a 1023# permanent time zone was decreed for the states of Campeche, Yucatan, 1024# and Quintana Roo, displacing them from the 90th to the 75th 1025# meridian. This disposition was annulled on December 2, 1982. 1026# 1027# In 1988 a Summer Time was established for the states of Tamaulipas, 1028# Nuevo Leon, Coahuila, and Durango, which meant that from the first 1029# Sunday in April to the last [Sunday] of October those states 1030# displaced their time from the 90th to the 75th meridian. That 1031# disposition lasted for one year. |
1032 |
1033# From Paul Eggert (2000-07-26): 1034# Shanks gives 1942-04-01 instead of 1942-04-24, and omits the 1981 1035# and 1988 DST experiments. Go with spin.com.mx. |
1036 |
1037# From Alan Perry <alan.perry@eng.sun.com> (1996-02-15): 1038# A guy from our Mexico subsidiary finally found the Presidential Decree 1039# outlining the timezone changes in Mexico. 1040# 1041# ------------- Begin Forwarded Message ------------- 1042# 1043# I finally got my hands on the Official Presidential Decree that sets up the 1044# rules for the DST changes. The rules are: --- 28 unchanged lines hidden (view full) --- 1073# (i.e. UTC -0600 and -0500 as of 1998-08-02). 1074 1075# From Rives McDow (2000-01-10): 1076# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 1077# zone 5 hours from the International Date Line, and will not observe daylight 1078# savings time so as to stay on the same time zone as the southern part of 1079# Arizona year round. 1080 |
1081# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 1082Rule Mexico 1939 only - Feb 5 0:00 1:00 D 1083Rule Mexico 1939 only - Jun 25 0:00 0 S 1084Rule Mexico 1940 only - Dec 9 0:00 1:00 D 1085Rule Mexico 1941 only - Apr 1 0:00 0 S 1086Rule Mexico 1943 only - Dec 16 0:00 1:00 D 1087Rule Mexico 1944 only - May 1 0:00 0 S 1088Rule Mexico 1950 only - Feb 12 0:00 1:00 D 1089Rule Mexico 1950 only - Jul 30 0:00 0 S 1090Rule Mexico 1996 max - Apr Sun>=1 2:00 1:00 D 1091Rule Mexico 1996 max - Oct lastSun 2:00 0 S 1092# 1093Rule BajaN 1954 1961 - Apr lastSun 2:00 1:00 D 1094Rule BajaN 1954 1961 - Sep lastSun 2:00 0 S 1095# Zone NAME GMTOFF RULES FORMAT [UNTIL] 1096# Quintana Roo 1097Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 |
1098 -6:00 - CST 1981 Dec 1099 -5:00 - EST 1982 Dec 2 |
1100 -6:00 - CST 1996 1101 -6:00 Mexico C%sT 1997 Oct lastSun 2:00 1102 -5:00 Mexico E%sT 1998 Aug 2 2:00 1103 -6:00 Mexico C%sT |
1104# Campeche, Yucatan 1105Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 1106 -6:00 - CST 1981 Dec 1107 -5:00 - EST 1982 Dec 2 1108 -6:00 Mexico C%sT 1109# Coahuila, Durango, Nuevo Leon, Tamaulipas 1110Zone America/Monterrey -6:41:16 - LMT 1922 Jan 1 0:01:32 1111 -6:00 - CST 1988 1112 -6:00 US C%sT 1989 1113 -6:00 Mexico C%sT |
1114# Central Mexico 1115Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 1116 -7:00 - MST 1927 Jun 10 23:00 1117 -6:00 - CST 1930 Nov 15 1118 -7:00 - MST 1931 May 1 23:00 1119 -6:00 - CST 1931 Oct 1120 -7:00 - MST 1932 Mar 30 23:00 1121 -6:00 Mexico C%sT --- 10 unchanged lines hidden (view full) --- 1132 -7:00 Mexico M%sT 1133# Sonora 1134Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 1135 -7:00 - MST 1927 Jun 10 23:00 1136 -6:00 - CST 1930 Nov 15 1137 -7:00 - MST 1931 May 1 23:00 1138 -6:00 - CST 1931 Oct 1139 -7:00 - MST 1932 Mar 30 23:00 |
1140 -6:00 - CST 1942 Apr 24 |
1141 -7:00 - MST 1949 Jan 14 1142 -8:00 - PST 1970 1143 -7:00 Mexico M%sT 1999 1144 -7:00 - MST |
1145# Baja California Sur, Nayarit, Sinaloa |
1146Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 1147 -7:00 - MST 1927 Jun 10 23:00 1148 -6:00 - CST 1930 Nov 15 1149 -7:00 - MST 1931 May 1 23:00 1150 -6:00 - CST 1931 Oct 1151 -7:00 - MST 1932 Mar 30 23:00 |
1152 -6:00 - CST 1942 Apr 24 |
1153 -7:00 - MST 1949 Jan 14 1154 -8:00 - PST 1970 1155 -7:00 Mexico M%sT 1156# Baja California 1157Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 1158 -8:00 - PST 1927 Jun 10 23:00 1159 -7:00 - MST 1930 Nov 16 |
1160 -8:00 - PST 1942 Apr 24 |
1161 -7:00 - MST 1949 Jan 14 1162 -8:00 BajaN P%sT 1976 1163 -8:00 US P%sT 1996 1164 -8:00 Mexico P%sT 1165# 1166# Revillagigedo Is 1167# no information 1168 --- 307 unchanged lines hidden --- |