I also have this problem and it's ridiculous how PCmag.com and cnet.com have already been commenting on it yet there is still no "official" problem as far Verizon is concerned. I first contacted Apple Support and their answer is to disable the automatic time. If you do that iMessage will complain at every message. This needs to be resolved for the sake of the business users that depend on the Calender function of the iPhone. It's pretty useless without the correct Time and Date.