I normally set my time to automatic which sets the time according to GPS. I live in Arizona which does not observe daylight saving time. Sensus inaccurately sets the clock an hour ahead to Mountain Time. During daylight saving time, Arizona is not in Mountain Time, it is actually Pacific Time. I would probably not be too concerned if I chose to set the time manually but it loses a couple of minutes in a few months time. I paid too much for this car to have issues like this that a $10 computer or watch would not have.