Mountain Time Zone is generically called Mountain Time (MT). Specifically, it is Mountain Standard Time (MST) when observing standard time, and Mountain Daylight Time (MDT) when observing daylight saving time. The term refers to how the Rocky Mountains, which range from northwestern Canada to the US state of New Mexico, are located almost entirely in the time zone. In Mexico, this time zone is known as the Zona Pacífico (Pacific Zone). In the US and Canada, the Mountain Time Zone is to the east of the Pacific Time Zone and to the west of the Central Time Zone. In some areas, starting in
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