Hello how may I help you? Hello. Is it later in New York or Los Angeles? I cannot explain how time zones work. i can only tell time differences Okay. How many hours apart are they LA is 4 hours behind NYC. How many hours difference is LA and San Francisco? They are both in the same time zone. Pacific Time Cool. Is all of California in that time zone? Some parts of CA are in Mountain Time Ok, thanks for the information! You are welcome. Need anything else? nope