There are 6 time zones in the United States. The eastern part of the U. S., including New York City, is in the Eastern Time Zone. The central part of the U. S., including Dallas, is in the Central Time Zone, which is one hour behind Eastern Time. San Diego is in the Pacific Time Zone, which is 3 hours behind Eastern Time. Write and solve an equation to determine what time it is in California if it is noon in New York.