The town of Hyder, because it essentially is a single town split by the border between the United States and Canada, unofficially observes Pacific Time including DST (UTC−08:00, DST UTC−07:00) like its neighbor Stewart, British Columbia, with the exception of the U.S. Post Office (because it is a federal facility).
[3][4][5] As part of Russian America, Alaska used the Julian calendar and followed the same day of the week as Asia, using the date of the eastern hemisphere.
[9] On January 20, 1942, all of the United States, including Alaska, began to observe War Time.
[10] Standard time in the United States advanced by one hour and would remain so until September 25, 1945, when the act was repealed.
[24] The tz database version 2025a contains seven time zones for Alaska for historical reasons.