Originally Posted by solret

Here's an answer that worked from BSteck on the Google support forum.
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On my HTC Phone (running Android 2.2), I went to Settings > Applications > Manage Applications > Running > Calendar Storage. I then pushed "Clear Data" and then "Force Stop" (because I wanted it to reload).


The phone paused for a brief moment when returning to Home and then the calendar was syncing to my gmail calendars. I figure that as long as all your information is backed up at gcal, you should be fine. Good luck!