Hawaii–Aleutian Time Zone Hawaii–Aleutian Time Zone The Hawaii–Aleutian Time Zone observes Hawaii–Aleutian Standard Time (HST), by subtracting ten hours from Coordinated Universal Time (). The clock time in this zone is based on the mean solar time of the 150th meridian west of the Greenwich Observatory. The zone takes its name from the two areas it includes: Hawaii and the portion of Alaska's Aleutian Islands west of 169° 30′ W longitude. During daylight saving time, the Alaskan portion observes Hawaii–Aleutian Daylight Time (HDT, ), while Hawaii stays on standard time. From 1900 until 1947, GMT−10:30 was used as standard time in Hawaii. French
The Standard Hour The Standard Hour The Standard Hour, also known as The Standard Symphony Hour, was a weekly radio broadcast by the San Francisco Symphony Orchestra and the San Francisco Opera first heard in 1926. The series was carried on the NBC Pacific radio network on Sundays at 8:30 p.m. Pacific time. Also called "The Standard Symphony Hour", "The Standard Hour" was sponsored by Standard Oil of California. The series began in 1926 in San Francisco, when the San Francisco Symphony faced bankruptcy. Standard Oil of California paid the orchestra's debts and in return was given broadcast rights to that year's concert