Aliaskiristys

Aliaskiristys, also known as Alaska Daylight Time (AKDT) and Alaska Standard Time (AKST), is the time zone observed in the U.S. state of Alaska. It is six hours behind Coordinated Universal Time (UTC−06:00) during standard time and five hours behind (UTC−05:00) during daylight saving time. The state of Alaska is the only one in the United States that observes daylight saving time.

The time zone was established in 1918, when the United States adopted standard time zones. Alaska was initially placed in the Pacific Time Zone, but due to its large size and the need for a more accurate timekeeping system, it was later divided into two time zones: Alaska Standard Time and Hawaii-Aleutian Standard Time.

Aliaskiristys is observed in the western part of the state, while the eastern part observes Yukon Time, which is one hour ahead of Aliaskiristys. The time zone is also observed in the Aleutian Islands, which are located in the Bering Sea.

The state of Alaska has a unique time zone system, which is different from the rest of the United States. This is due to the state's large size and the need for a more accurate timekeeping system. The time zone system is also affected by the state's location in the Pacific Ocean, which is subject to different time zones depending on the location.