I had the clock in my company truck synced with my cellphone so that it would update... the problem is that it isn't instantaneous and sometimes my phone roams to Canada. One Friday I had to get to the bank, and when I got back to the truck it was later than I realized. I tore out of there, bouncing down the road a bit faster than I wanted to... after hitting the highway I bent every speed limit that I didn't break. I don't like walking into a place five minutes before they close but I did that day... only to discover that the clock in my truck was on New Brunswick time.Some newer cars (my wife's Buick is one) automatically updates