While syncing my iPhone 4S to iTunes yesterday, I received and downloaded the iOS 6.1.3 update for iPhone (connecting from my MacBook Pro). After the sync, I pulled up my calendars on MacBook and discovered they had been completely wiped out. My iPhone and iPad still have the current calendars that are also contained in iCloud, but the MacBook information has been completely deleted. Now I will not sync my devices to the Mac for fear their calendars will also be deleted. I've searched both iCloud and my Mac, but I can't figure out how to sync or export the calendars from iCloud back to my laptop. Any suggestions? Thanks so much!