Yukon Time Zone clocks ahead yet another hour on October 30, 1983 to adopt Alaska Standard Time (the former Yukon Standard Time), effectively changing their standard time zone by two hours. Most of the Aleutian Islands moved from the Bering Time Zone (UTC-11) to the Hawaii-Aleutian Standard Time Zone (UTC-10) (until 1983 known as the Alaska-Hawaii Standard Time Zone). Yukon Time Zone The Yukon Time Zone was a time zone that kept standard time; Yukon Standard Time (YST) was obtained by subtracting nine hours from Coordinated Universal Time (UTC) resulting in UTC−9. Yukon Daylight Time (YDT) when observed was eight hours behind UTC.
The Standard School Broadcast in Salt Lake City, Utah, KTAR in Phoenix, Arizona, KGLU in Safford, Arizona, KVOA in Tucson, Arizona, and KYUM in Yuma, Arizona, on Thursday at 10 a.m. Pacific time and 11 a.m. Mountain time. At that time, Carl Kalesch was the music director for the programs and John Grover was the announcer. The theme music for "The Standard School Broadcast," as well as "The Standard Hour," was "This Hour Is Yours". The theme was composed by Julius Haug, a violinist in the San Francisco Symphony Orchestra. "It was simple theme music, 45 seconds long," wrote radio historian John Dunning, "and