Hello how may I help you? can you explain to me how time zones work? I'm afraid not. I can only calculate the time between different time zones. so if it's 9pm in new york, what time would it be in california? 6 PM. will it always be 3 hours difference? Yes, for all of time. ok, if its 6pm in california what time would it be in hawaii? 3 PM. cool, thanks so much! You are welcome. Have a nice day.