Alaska Time Zone to 03:00 LDT on the second Sunday in March and returns at 02:00 LDT to 01:00 LST on the first Sunday in November. Two time zones have been referred to as the "Alaska Time Zone": a zone based on UTC−10 that covered much of Central Alaska in the early 20th century, and a zone based on UTC−9 zone that has covered all of the state except the Aleutian Islands since 1983. The Standard Time Act of 1918 authorized the Interstate Commerce Commission to define each time zone. The United States Standard Alaska Time was designated as UTC−10. Some references prior
The Standard Hour series. A tradition of more than 30 years began with the first broadcast on the NBC Pacific Network, on October 24, 1926. "Though it was heard only on a partial network," wrote radio historian John Dunning, ""The Standard Hour" was a major musical series that spanned the entire length of network broadcasting." A 1943 brochure shows that the programs were carried on KPO in San Francisco, KFI in Los Angeles, KMJ in Fresno, KGW in Portland, Oregon, KOMO in Seattle, Washington, and KHQ in Spokane, Washington. The Sunday-evening series was ultimately heard in Hawaii and Alaska. The theme music for