View source for IANA time zone database

== Abbreviations ==
* proposal to change to [[Internationalized time point unique time zone abbreviations]] at http://mm.icann.org/pipermail/tz/2012-October/018362.html


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

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



=== Components that do not specify a location ===
{| class="wikitable"
! 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
|}

== Bugs ==
Some fixes can be found at [[ANNA time zone database]].
{| class="wikitable sortable"
! Country
! Description
! width=64 | 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 [http://article.gmane.org/gmane.comp.time.tz/1042/match=est]
| 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 [http://article.gmane.org/gmane.linux.debian.devel.glibc/12741/match=wita+wib+wit]
| 2013-02-13 14:17:58 [http://article.gmane.org/gmane.comp.time.tz/5839]
| 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 [http://article.gmane.org/gmane.comp.time.tz/5218/]
| 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 [http://article.gmane.org/gmane.comp.time.tz/4905/match=barnaul+tomsk]
| 2011-09-17 16:12:16 [http://article.gmane.org/gmane.comp.time.tz/4872/match=siberia]
| 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".