Us time zone map major airports12/26/2023 ^ "Daylight Saving Time 2021 in Hawaii, United States".Hawaii-Aleutian (HT) HST -10 HDT -9 DST observed in Aleutian Islands, but not Hawaii National Institute of Standards and Technology, U.S. ^ "What are the time zones in the United States?".HDT-Hawaii-Aleutian daylight time (not observed in HI). The following forms are to be used when abbreviating names of time zones. Government Printing Office Style Manual: An official guide to the form and style of Federal Government printing" (PDF). Effects of time zones on North American broadcasting.The largest city and metropolitan area in the Hawaii–Aleutian Time Zone are Honolulu and its metropolitan area, respectively. term and for that reason the Polynesian areas are not considered to be a part of the Hawaii–Aleutian Time Zone. įrench Polynesia uses UTC−10:00 for its major cities. įrom 1900 until 1947, UTC−10:30 was used as standard time in Hawaii. Hawaii has not observed daylight saving time since September 1945. 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.ĭuring daylight saving time (DST), the Alaskan portion observes Hawaii–Aleutian Daylight Time (HDT, UTC−09:00), while Hawaii stays on standard time. The clock time in this zone is based on the mean solar time of the 150th meridian west of the Greenwich Observatory. The Hawaii–Aleutian Time Zone observes Hawaii–Aleutian Standard Time (HST) by subtracting ten hours from Coordinated Universal Time ( UTC−10:00). ( June 2012) ( Learn how and when to remove this template message)ĭST is observed in some of this time zone. Please help to improve this article by introducing more precise citations. This article includes a list of general references, but it lacks sufficient corresponding inline citations.
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