Hey, I noticed yesterday that Calendar on my iPhone 6S Plus is no longer syncing to Calendar on my MacBook. Over the weekend I updated to iOS 10 and also changed my Apple password, so I'm sure the problem has to do with one or the other. I had this problem once before and I can't remember exactly what the solution was, but I know it had something to do with the time or time zone or something on my iPhone which strangely was preventing Calendar from syncing. I'm not sure if the same thing is going on here or not. Any ideas?