I was told my clock can be fixed by having the dealership reinstall the OS. That would take about 6 hrs they say, which I can't really be without my work vehicle for that long so I've just lived with it.
My wife's car has an older version of Sync, and I can update it myself by downloading a file to a USB drive and plugging it into the car. It took less than an hour. For some reason, dealer mechanics can't do anything computer related in less than a day.