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Alaska Standard Time: 1918 – January 19, 1942 GMT−08:00 (Panhandle Areas) Pacific Standard Time: GMT−09:00 (in Yakutat) Yukon Standard Time: GMT−10:00: Alaska Standard Time: GMT−11:00 (Nome, and Aleutian Islands) Bering Standard Time: January 20, 1942 – September 30, 1945 GMT−07:00 (Panhandle Areas) Pacific War Time: GMT−08:00 ...
The United States Standard Alaska Time was designated as UTC−10:00. [1] Some references prior to 1967 refer to this zone as Central Alaska Standard Time (CAST) [2] or as Alaska Standard Time (AKST). In 1966, the Uniform Time Act renamed the UTC−10:00 zone to Alaska-Hawaii Standard Time [3] (AHST [4]), effective April 1, 1967. [5]
Such designations can be ambiguous; for example, "CST" can mean China Standard Time (UTC+08:00), Cuba Standard Time (UTC−05:00), and (North American) Central Standard Time (UTC−06:00), and it is also a widely used variant of ACST (Australian Central Standard Time, UTC+9:30). Such designations predate both ISO 8601 and the internet era; in ...
An hour of syndicated programming time (between 7:00 and 8:00 p.m. in the Eastern and Pacific time zones) is lost in the Central and Mountain time zones since network primetime in those areas starts at 7:00 p.m., forcing stations in Mountain or Central time (or in parts of both zones) to choose between airing their 6:00 p.m. newscast and ...
If present, a dagger (†) indicates the usage of a nautical time zone letter outside of the standard geographic definition of that time zone. Some zones that are north/south of each other in the mid-Pacific differ by 24 hours in time – they have the same time of day but dates that are one day apart. The two extreme time zones on Earth (both ...
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Time zones of the world. A time zone is an area which observes a uniform standard time for legal, commercial and social purposes. Time zones tend to follow the boundaries between countries and their subdivisions instead of strictly following longitude, because it is convenient for areas in frequent communication to keep the same time.
The evolution of United States standard time zone boundaries from 1919 to 2024 in five-year increments. Plaque in Chicago marking the creation of the four time zones of the continental US in 1883 Colorized 1913 time zone map of the United States, showing boundaries very different from today Map of U.S. time zones during between April 2, 2006, and March 11, 2007.