# Copyright (C) 2016 and later: Unicode, Inc. and others. # License & terms of use: http://www.unicode.org/copyright.html ###################################################################### # Copyright (C) 2007-2014, International Business Machines # Corporation and others. All Rights Reserved. ###################################################################### # This is an ICU-specific file with the same format as regular # tzdata time zone files, for consistent parsing by the tools that # turn "Olson" tzdata into ICU's zoneinfo.txt. # The purpose of this file is to give ICU a superset of the time zones # that are in CLDR and also include legacy ICU time zones originally # in tz.alias for rataining backward compatibility. # Add Etc/Unknown, defined by CLDR. Give it Etc/GMT behavior. # Zone NAME GMTOFF RULES FORMAT Zone Etc/Unknown 0 - Unknown # SystemV time zones. # The Olson systemv file has these commented out. # Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL] Zone SystemV/AST4ADT -4:00 SystemV A%sT Zone SystemV/EST5EDT -5:00 SystemV E%sT Zone SystemV/CST6CDT -6:00 SystemV C%sT Zone SystemV/MST7MDT -7:00 SystemV M%sT Zone SystemV/PST8PDT -8:00 SystemV P%sT Zone SystemV/YST9YDT -9:00 SystemV Y%sT Zone SystemV/AST4 -4:00 - AST Zone SystemV/EST5 -5:00 - EST Zone SystemV/CST6 -6:00 - CST Zone SystemV/MST7 -7:00 - MST Zone SystemV/PST8 -8:00 - PST Zone SystemV/YST9 -9:00 - YST Zone SystemV/HST10 -10:00 - HST # The list below is for supporting legacy ICU zone aliases. # These definitions were originally defined in tz.alias. #### Aliases that conflict with Olson compatibility Zone definition Link Australia/Darwin ACT Link Australia/Sydney AET Link America/Argentina/Buenos_Aires AGT Link Africa/Cairo ART Link America/Anchorage AST Link America/Sao_Paulo BET Link Asia/Dhaka BST Link Africa/Maputo CAT Link America/St_Johns CNT Link America/Chicago CST Link Asia/Shanghai CTT Link Africa/Addis_Ababa EAT Link Europe/Paris ECT #Link Europe/Istanbul EET # EET is a standard UNIX zone ####Link EST America/New_York EST # Defined as -05:00 ####Link Pacific/Honolulu HST # Defined as -10:00 Link America/Indiana/Indianapolis IET Link Asia/Kolkata IST Link Asia/Tokyo JST #Link Asia/Tehran MET # MET is a standard UNIX zone Link Pacific/Apia MIT ####Link America/Denver MST # Defined as -07:00 Link Asia/Yerevan NET Link Pacific/Auckland NST Link Asia/Karachi PLT Link America/Phoenix PNT Link America/Puerto_Rico PRT Link America/Los_Angeles PST Link Pacific/Guadalcanal SST #Link Etc/UTC UTC # Olson LINK Link Asia/Ho_Chi_Minh VST # # Aliases already dropped from the TZ database. # ICU may also remove these aliases. # Link America/Regina Canada/East-Saskatchewan # removed from backward in 2017c # Note: # Following section was added for tz database 2018a and 2018b. # ICU has a bug handling negative DST, and we also don't want to # flip sumer time name and winter time name for Dublin at least for # now. Because the change had major impacts to tz database external # consumers, the tz database maintainer once reverted the Europe/Dublin # rules (same as 2017c or older) in 2018c. The tz database maintainer # thinks the changes in 2018a should be brought back when external # tz database consumers are ready to adopt the change. We don't know # what CLDR TC want to do with this for now. But if tz database brings # back the change, and CLDR TC (and ICU TC) want to keep the display name # unchanged, then we can uncomment the block below to restore ICU # custom override. (Yoshito 2018-01-23) # # tzdata2018a changed Europe/Dublin to use IST (UTC+1) as the standard time # of the region, and GMT (UTC) as the daylight saving time with negative # offset (-1 hour) in winter. ICU SimpleTimeZone rejects a zone with negative # daylight saving time offset. We could remove the restriction in newer version # of ICU, but such data does not work well with older ICU runtime without # fixing the issue. For now, we define our own Europe/Dubin in ICU, replacing # Europe/Dublin data from the tz database. # # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S # Rule Eire--ICU 1971 only - Oct 31 2:00u 0 GMT # Rule Eire--ICU 1972 1980 - Mar Sun>=16 2:00u 1:00 IST # Rule Eire--ICU 1972 1980 - Oct Sun>=23 2:00u 0 GMT # Rule Eire--ICU 1981 max - Mar lastSun 1:00u 1:00 IST # Rule Eire--ICU 1981 1989 - Oct Sun>=23 1:00u 0 GMT # Rule Eire--ICU 1990 1995 - Oct Sun>=22 1:00u 0 GMT # Rule Eire--ICU 1996 max - Oct lastSun 1:00u 0 GMT # Zone NAME GMTOFF RULES FORMAT [UNTIL] # Zone Europe/Dublin--ICU -0:25:00 - LMT 1880 Aug 2 # -0:25:21 - DMT 1916 May 21 2:00s # -0:25:21 1:00 IST 1916 Oct 1 2:00s # 0:00 GB-Eire %s 1921 Dec 6 # independence # 0:00 GB-Eire GMT/IST 1940 Feb 25 2:00s # 0:00 1:00 IST 1946 Oct 6 2:00s # 0:00 - GMT 1947 Mar 16 2:00s # 0:00 1:00 IST 1947 Nov 2 2:00s # 0:00 - GMT 1948 Apr 18 2:00s # 0:00 GB-Eire GMT/IST 1968 Oct 27 # 0:00 Eire--ICU GMT/IST # Link Europe/Dublin--ICU Eire--ICU