IANA time zone database

From annawiki

Abbreviations


Location specification

  • Sometimes the ISO 3166-1 alpha-2 country code (cc) is used, then the format often is ccT.

Without location specification

position from right Letter Meaning Offset mark? Occurrence
1 T Time N/A always
2 D Daylight (Saving) 1:00 several
2 S Standard N/A several
2 S Summer 1:00 europe file: e.g. BST British Summer Time, CEST Central European Summer Time
2 W War 1:00 northamerica file: US and Mexico
2 P Peace 1:00 northamerica file: US
2 M Mean N/A
  • africa file: LMT # Lisbon Mean Time, FMT # Freetown Mean Time, PMT # Paris Mean Time
  • europe file: MMT # Moscow Mean Time
  • southamerica file: CMT # Cordoba Mean Time, CMT # Calamarca MT(!), QMT # Quito Mean Time, BMT # Bogota Mean Time, SMT # Stanley Mean Time, SMT # Santiago Mean Time, MMT # Montevideo MT(!), PMT # Paramaribo Mean Time, CMT # Caracas Mean Time
2 M Midsummer 2:00 europe file: Moscow - M # Midsummer, also for Spain, France, Germany/SovietZone
32 LM Local Mean N/A several
32 DS Double Summer 2:00 europe file: MDST # Moscow Double Summer Time, BDST - British Double Summer Time
32 DD Double Daylight (Saving) 2:00 northamerica file: StJohns 1988)
32 HS half summer time? 0:30
  • australasia file: Pacific/Rarotonga CK%sT and "HS"
  • southamerica file: Uruguay
32 HS ? 0:20
  • africa file: Rule Ghana 1936-1942
32 HD half daylight saving time 0:30
  • northamerica file: Rule Belize 1918-1942
  • northamerica file: Rule DR 1969-1973

Other:

Kampala:
3:00	-	EAT	1930
2:30	-	BEAT	1948
2:45	-	BEAUT	1957
Aruba (in ISO 3166-1 AW)
-4:00	-	AST
GBGT	1966 May 26 # Br Guiana Time
NEGT	1975 Nov 20 # Dutch Guiana Time
  • Two letters for locality - xxT
    • Brazil - Fernando Noronha: FNT
  • Two letter for locality - xxST
    • Lord Howe : LHST
  • Two letters for locality - xx%sT
    • Several zone in Brazil that use Brasilia BRT (BR is also the country code)

Bugs

Some fixes can be found at ANNA time zone database.

Country Description Open since at least Why not fixed?
Australia EST and CST are used as acronyms for AEST/AEDT and CEST/CEDT, i.e. during DST one cannot tell from the acronym what zone is meant. 2006-06-02 04:08:36 [1] TZ coordinator (Paul Eggert) does not want to fix
Indonesia WIT means Western Indonesian Time, but in local Indonesian language, WIT stands for Waktu Indonesia Timur (Eastern Indonesian Time), change requests - without mentioning the ambiguity - go back to 2003 [2] 2013-02-13 14:17:58 [3] TZ coordinator (Paul Eggert) does not fix
Norway No IANA zone defined for Bouvet Island while Norwegian law sets a standard time http://article.gmane.org/gmane.comp.time.tz/5218/ 2012-05-29 18:32:23 [4] TZ coordinator (Paul Eggert) does not want to fix
Russia
  • Zones in Siberia are wrong
  • patch provided 2012-05-02 22:18:43 by Arthur David Olson [5]
2011-09-17 16:12:16 [6] TZ coordinator (Paul Eggert) does not fix - reason unknown
Australia/Antarctica Antarctica/Macquarie given as AQ territory, not AU territory. 2013-04-12

Localization

CLDR

http://unicode.org/repos/cldr/trunk/common/supplemental/metaZones.xml

  • territory 001 - might refer to the UN M.49 code for "World".