I finally figured out how to do this...
You will need a rooted device, adb installed on your computer, and the stock calendar application, attached here.
On your phone uninstall Calendar and CalendarProvider. Using Titanium Backup or some other app makes it easier.
Then go to phone Settings -> Applications -> Manage Applications and delete:
Connect the phone to you computer in debug mode and launch a terminal.
- adb install /pathToFile/CalendarProvider.apk
- adb install /pathToFile/Calendar.apk