I've noticed car clocks are quite inaccurate. My HCH's clock gains about a minute in 3 months (as did my old Corolla), while the clock in the wife's Mercury loses ~30 seconds a month. (My wristwach, OTOH, is fast by just 2 seconds a week.) Maybe some bright automotive engineer will invent an "atomic car clock" that automatically resets itself to the precise time daily (and changes back & forth from DST). An hour chime would be nice too.