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Hawaii–Aleutian Time Zone

Hawaii–Aleutian 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° 30′ 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.

From 1900 until 1947, UTC−10:30 was used as standard time in Hawaii.[3]

French Polynesia uses UTC−10:00 for its major cities. The Cook Islands also use the same time. 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.

Hawaii–Aleutian Time Zone
UTC offset
HSTUTC−10:00
HDTUTC−09:00
Current time
20:58, 19 September 2019 HADT[refresh [10] ]
Observance of DST
DST is observed in some of this time zone.

Major metropolitan areas

  • Honolulu, Hawaii

  • Hilo, Hawaii

  • Kahului, Hawaii

  • Kailua-Kona, Hawaii

  • Kapaa, Hawaii

Other significant places

  • Adak Island, Alaska

  • Johnston Atoll

See also

  • Time zone

  • Time offset

  • Effects of time zones on North American broadcasting

References

[1]
Citation Linkwww.gpo.gov"U.S. Government Printing Office Style Manual: An official guide to the form and style of Federal Government printing" (PDF). U.S. Government Printing Office. 2008. p. 234. Retrieved 2017-07-24. Time zones §9.47. The following forms are to be used when abbreviating names of time zones: ... HDT—Hawaii-Aleutian daylight time (not observed in HI) ... HST—Hawaii-Aleutian standard time
Sep 20, 2019, 9:41 AM
[2]
Citation Linkwww.nist.gov"What are the time zones in the United States?". National Institute of Standards and Technology, U.S. Department of Commerce. 2016. Retrieved 2017-07-24. Hawaii-Aleutian (HT); HST -10; HDT -9; DST observed in Aleutian Islands, but not Hawaii
Sep 20, 2019, 9:41 AM
[3]
Citation Linkwww.twinsun.com"Sources for Time Zone and Daylight Saving Time Data". Retrieved 2012-06-18.
Sep 20, 2019, 9:41 AM
[4]
Citation Linkwww.timeanddate.comHST – Hawaii–Aleutian Standard Time
Sep 20, 2019, 9:41 AM
[5]
Citation Linkwww.timeanddate.comHDT – Hawaii–Aleutian Daylight Time
Sep 20, 2019, 9:41 AM
[6]
Citation Linkweb.archive.orgThe official U.S. time for the Hawaii–Aleutian time zone (Hawaii)
Sep 20, 2019, 9:41 AM
[7]
Citation Linkweb.archive.orgThe official U.S. time for the Hawaii–Aleutian time zone (Aleutian Islands)
Sep 20, 2019, 9:41 AM
[8]
Citation Linkwww.nist.govWhat are the time zones in the United States? (NIST)
Sep 20, 2019, 9:41 AM
[9]
Citation Linkwww.law.cornell.eduHawaiian-Aleutian zone at Cornell
Sep 20, 2019, 9:41 AM
[10]
Citation Linken.wikipedia.orgrefresh
Sep 20, 2019, 9:41 AM
[11]
Citation Linkwww.gpo.gov"U.S. Government Printing Office Style Manual: An official guide to the form and style of Federal Government printing"
Sep 20, 2019, 9:41 AM
[12]
Citation Linkwww.nist.gov"What are the time zones in the United States?"
Sep 20, 2019, 9:41 AM
[13]
Citation Linkwww.twinsun.com"Sources for Time Zone and Daylight Saving Time Data"
Sep 20, 2019, 9:41 AM
[14]
Citation Linkwww.timeanddate.comHST – Hawaii–Aleutian Standard Time
Sep 20, 2019, 9:41 AM
[15]
Citation Linkwww.timeanddate.comHDT – Hawaii–Aleutian Daylight Time
Sep 20, 2019, 9:41 AM
[16]
Citation Linkweb.archive.orgThe official U.S. time for the Hawaii–Aleutian time zone (Hawaii)
Sep 20, 2019, 9:41 AM
[17]
Citation Linkweb.archive.orgThe official U.S. time for the Hawaii–Aleutian time zone (Aleutian Islands)
Sep 20, 2019, 9:41 AM
[18]
Citation Linkwww.nist.govWhat are the time zones in the United States? (NIST)
Sep 20, 2019, 9:41 AM
[19]
Citation Linkwww.law.cornell.eduHawaiian-Aleutian zone at Cornell
Sep 20, 2019, 9:41 AM
[20]
Citation Linken.wikipedia.orgThe original version of this page is from Wikipedia, you can edit the page right here on Everipedia.Text is available under the Creative Commons Attribution-ShareAlike License.Additional terms may apply.See everipedia.org/everipedia-termsfor further details.Images/media credited individually (click the icon for details).
Sep 20, 2019, 9:41 AM