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I found this article for you to help troubleshoot why the calendar data is not syncing over to your devices.
It is named Mac OS X: Resetting the SyncServices folder found here http://support.apple.com/kb/TS1627.
There are different instructions depending on your OS in the article.
If for some reason the issue persists, I would take a look at the article named Sync Services: Advanced troubleshooting for contact and calendar syncing located here: http://support.apple.com/kb/ts2481.
All the very best,