Pacific Time Zone early November) is being observed. In Mexico, the corresponding time zone is known as the "Zona Noroeste" (Northwest Zone) and observes the same daylight saving schedule as the U.S. and Canada. The largest city in the Pacific Time Zone is Los Angeles; the city's metropolitan area is the largest in the zone. The zone is two hours ahead of the Hawaii–Aleutian Time Zone, one hour ahead of the Alaska Time Zone, one hour behind the Mountain Time Zone, two hours behind the Central Time Zone, three hours behind the Eastern Time Zone, and four hours behind the Atlantic Time Zone.
The Standard School Broadcast of listeners. A few episodes of "The Standard School Broadcast" are available from old-time radio program collectors. In the 1970s, the Chevron Research Company released a series of recordings edited from "The Standard School Broadcast" as a public service. The LP records, with teachers guides, were available free of charge to elementary and junior high schools throughout the West, Rocky Mountain area and the Southwest. These out-of-print recordings have been sold on various websites. The Standard School Broadcast The Standard School Broadcast was a weekly educational radio program that went on the air in 1928 and promoted music appreciation for