Updated to ios6 2 weeks ago. Data was lost yesterday. But it's unstable. This morning i see that everything prior to October 2012 is gone, but October and November entries are there. Can't begin to think about what's going on. Suggestions?Did you lose them after you updated to iOS 6? Or are you already on iOS 6 for a while and they just disappeared all of a sudden.
I haven't experienced that, but I have Google Calendar. What are you using?