The Hawaii-Aleutian Time Zone observes Hawaii-Aleutian Standard Time (HAST), by subtracting ten hours from Coordinated Universal Time (UTC-10). The clock time in this zone is based on the mean solar time of the 150th meridian west of the Greenwich Observatory.

The zone takes its name from the two areas it includes: Hawaii and the portion of Alaska's Aleutian Islands west of 169° 30′ W longitude. The Alaskan portion observes DST while Hawaii does not.

Hawaii used a standard time of GMT-10:30 from 1900 until 1947, when clocks were changed to the present -10:00 zone. [1]

[edit] Major Metropolitan Areas

• Honolulu, Hawaii

[edit] See also

• Time zone
• Time offset

[edit] External links

• HAST - Hawaii-Aleutian Standard Time
• The official U.S. time for the Hawaii-Aleutian time zone (Hawaii)
• The official U.S. time for the Hawaii-Aleutian time zone (Aleutian Islands)

v • d • e Time zones in North America
Time Zone	UTC-10	UTC-9	UTC-8	UTC-7	UTC-6	UTC-5	UTC-4	UTC-3:30	UTC-3	UTC-2:30	UTC-2
Name	Hawaii-Aleutian Standard	Alaska Standard	Pacific Standard	Mountain Standard	Central Standard	Eastern Standard	Atlantic Standard	Newfoundland Standard	Saint Pierre and Miquelon Standard
		Hawaii-Aleutian Daylight	Alaska Daylight	Pacific Daylight	Mountain Daylight	Central Daylight	Eastern Daylight		Atlantic Daylight	Newfoundland Daylight	Saint Pierre and Miquelon Daylight