UTC-10

UTC-10 is a Time zone, late of 10 hours on UTC.

Zones concerned

UTC-10 is used in the following countries or territories:

The atoll of Johnston is an uninhabited small island belonging to the minor islands far away from the United States. UTC-10 is used there by the scientific teams or soldiers who reside there temporarily.

Geography

UTC-10 corresponds to a zone whose Longitude S lie between 142,5° E and 157,5° E and the hour initially used corresponded to the average solar hour of the 150 {{E}} meridian west. If it is possible to use it for the International water located between these two longitudes, some of the emerged grounds concerned have a Standard time different: the continental part of the Alaska uses UTC-9 and the islands of the Line (Kiribati) UTC+14.

In fact, the majority of the grounds using UTC-10 are located in zones which correspond potentially to other time zones: it is particularly the case for the Aleutian Islands, Hawaii and Tokelau which are very close to the Date-line. The local average solar hour of the the island Attu, most Western of the Aleutian Islands, is close to UTC-12: 30; that of the Atoll of Kure, at the end of the Archipelago of Hawaii, borders UTC-12: 00; that of the Eastern atolls of the Tuamotu approach UTC-9: 00.

In the United States, the time zone is called Hawaii-Aleutian Standard Time (standard hour of Hawaii and Aleutian Islands, shortened in HST or HAST).

Summer-time

The Aleutian Islands and the island the St. Lawrence are the two only areas of UTC-10 to use the Summer-time; they pass then to UTC-9.

Reciprocally, no territory using the summer-time is found then with UTC-10.

History

The islands of the Line, in the State of the Kiribati, used UTC-10 until the end of the year 1994 and passed directly to UTC+14 while jumping on December 31st, 1994.

See too

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