The Yukon Time Zone based on UTC−09:00 was later renamed the Alaska Time Zone in 1984. With the consolidation of Alaska's four time zones into two in 1983, the entire state was in either a zone based on UTC−09:00 or UTC−10:00. In 1975, the Yukon Territory switched to Pacific Standard Time, leaving Yakutat the only land area in the zone. Nome and the Aleutians previously observed Bering Standard Time or UTC−11:00. The Alaska Panhandle communities were in the Pacific Time Zone, while most of the interior was on UTC−10:00. This time zone included Canada's Yukon Territory and a small portion of Alaska including Yakutat. Prior to 1983, the current Alaska Time Zone (UTC−09:00) was known as the Yukon Time Zone, observing Yukon Standard Time (YST). This zone was renamed in 1983 to Hawaii-Aleutian Standard Time when the majority of Alaska was moved out of the zone. In 1966, the Uniform Time Act renamed the UTC−10:00 zone to Alaska-Hawaii Standard Time (AHST ), effective April 1, 1967. Some references prior to 1967 refer to this zone as Central Alaska Standard Time (CAT) or as Alaska Standard Time (AST). The United States Standard Alaska Time was designated as UTC−10:00. The Standard Time Act of 1918 authorized the Interstate Commerce Commission to define each time zone. Two time zones have been referred to as the "Alaska Time Zone": a zone based on UTC−10:00 that covered much of Central Alaska in the early 20th century, and a zone based on UTC−09:00 zone that has covered all of the state except the Aleutian Islands since 1983. Wednesday, J– Friday, Octo(Julian Calendar) ![]() As such, Alaska spends most of the year on daylight saving time rather than standard time. The Anchorage Metropolitan Area is the largest metropolitan area in the zone.Įffective from 2007, the local time changes from AKST to AKDT at 02:00 LST (local standard time) to 03:00 LDT (local daylight time) on the second Sunday in March and returns at 02:00 LDT to 01:00 LST on the first Sunday in November. The largest city in the Alaskan Time Zone is Anchorage, Alaska. ![]() The western Aleutian Islands observe Hawaii–Aleutian Time, one hour behind the remainder of the state.
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