If it's 1 PM Mountain Time, then it's noon Pacific Time. The U.S. has four main time zones. From west to east, they are: Pacific Time, Mountain Time, Central Time, and Easternâ¦ Time. Each is one hour later than the last. For example, if it's 8 PM Pacific Time, then it's 9 PM Mountain Time, 10 PM Central Time, and 11 PM Eastern Time.