Hawaii–Aleutian Time Zone
Template:Use mdy dates Template:Short description Template:More footnotes Template:Infobox time zone The Hawaii–Aleutian Time Zone observes Hawaii–Aleutian Standard Time (HST)[1][2] by subtracting ten hours from Coordinated Universal Time (UTC−10:00). 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° 30Template:Prime W longitude.
During daylight saving time (DST), the Alaskan portion observes Hawaii–Aleutian Daylight Time (HDT, UTC−09:00), while Hawaii stays on standard time. Hawaii has not observed daylight saving time since September 1945.[3]
Until 1947, UTC−10:30 was used as standard time in Hawaii. On June 8 of that year, a new territorial law moved Hawaiian Standard Time 30 minutes ahead.[4]
Hawaii–Aleutian Standard Time[5] was established to maintain consistency in the scheduling of business and government activities across Hawaii and the Aleutian Islands.
French Polynesia uses UTC−10:00 for its major cities.[6] The Cook Islands also use the same time.[7] These areas do not use DST. "Hawaii–Aleutian Time Zone" is a U.S. term and for that reason the Polynesian areas are not considered to be a part of the Hawaii–Aleutian Time Zone.
The largest city and metropolitan area in the Hawaii–Aleutian Time Zone are Honolulu and its metropolitan area, respectively.
Major metropolitan areas
Other significant places
See also
References
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External links
- HST – Hawaii–Aleutian Standard Time
- HDT – Hawaii–Aleutian Daylight Time
- Official U.S. time, including for the Hawaii–Aleutian Time Zone
- What are the time zones in the United States? (NIST) Template:Webarchive
- Hawaiian-Aleutian zone at Cornell
| Time zone | Hours from UTC: Standard time | Hours from UTC: Daylight saving time |
|---|---|---|
| Hawaii–Aleutian (in Hawaii) | −10 | −10 |
| Hawaii–Aleutian (parts of Alaska) | −10 | −9 |
| Alaska | −9 | −8 |
| Pacific (parts of Alaska) | −8 | −8 |
| Pacific (other states/provinces) | −8 | −7 |
| Mountain (Arizona, Sonora, Yukon, and Northeastern British Columbia only) | −7 | −7 |
| Mountain (other states/provinces) | −7 | −6 |
| Saskatchewan | −6 | −6 |
| Central (other states/provinces) | −6 | −5 |
| Eastern (parts of Nunavut, Ontario, and the Caribbean) | −5 | −5 |
| Eastern (other states/provinces) | −5 | −4 |
| Atlantic (Natashquan River) | −4 | −4 |
| Atlantic (other provinces) | −4 | −3 |
| Newfoundland | −3:30 | −2:30 |
| Saint Pierre and Miquelon and most of Greenland |
−3 | −2 |