Can someone please help me with this. I have ticked the sync calendars in the phone info tab. I tend to put appointments on both my iPhone and my iPad so I need all 3 talking to each other.
Visited the local Apple store and they fixed it!
Firstly, they said go into settings, then Mail, Contacts, Calendars, then down to Calendars switch the Shared Calendar Alerts off then back on. If that doesn't work (it didn't for me) - secondly, check if your default calendar is on Yahoo or iCloud. Mine was on Yahoo and is now on iCloud......success!
Best of luck, hope this works for everyone else with the same problem.