Regions which fall within the Hawaii – Aleutian Time Zone recognizes a standard time by adjusting their clocks ten hours backwards from Coordinated Universal Time resulting in UTC – 10:00. The clock time within the Hawaii -Aleutian Time Zone is primarily supported by the mean solar time of the 150th meridian west of the London Greenwich Observatory.
The name Hawaii – Aleutian Time Zone is derived from the two regions governed by this specific time zone and included Hawaii and an area of the Unites States State of Alaska known as the Aleutian Islands.
Daylight Saving Time in the Hawaii – Aleutian Time Zone.
The Energy Policy Act of 2005 which became effective in the United States in 2007 as form of amendment to the Uniform Time act of 1966. The Uniform Time Act of 1966 which was enacted on April 13, 1966 was set forth as a federal law in the United States to promote the adoption of a unified time within the standard time zones as suggested by the 1918 Standard Time Act. This has resulted in the Alaskan territories which fall under the Hawaii-Aleutian Time Zone during daylight saving time to observe a Hawaii – Aleutian Standard Time by adjusting their clocks one hour backwards to UTC – 09:00 while Hawaii remains its standard time.
During the period in-between 1900 through to 1947 GMT – 10:30 was formally used as the standard time for the state of Hawaii.
The group of islands known as the French Polynesia as well as the Cook Islands have both been known to adopt a standard time based on UTC – 10:00. Notably neither of the two regions have been observed to recognize daylight saving time. Considerably the term Hawaii – Aleutian Time Zone is noted as a term enacted by the United States and it is for this reason that the Polynesian regions do not recognize themselves as a part of the Hawaii – Aleutian Time Zone.
Some of the major metropolitan regions which use the Hawaii – Aleutian Time Zone include, Honolulu County which is officially known as the City and County of Honolulu, Hilo which is the largest settlement in Hawaii County and encompasses the Islands of Hawaii, the North Kona District of Kailua, and the city of Adak located in Adak Island in the Aleutians West Census Area of Alaska, United States and formally known as Adak Station.