iCal Icon    Backing up or restoring calendars
 

You can save a copy of your iCal calendars in case you make changes to them and later want to return back to a previous state.

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To make a backup copy of all your iCal calendars (including events and To Do items), choose File > "Back up Database." Then name the backup file and choose where you want to keep it on your hard disk.

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To revert iCal back to the information you had at your last backup, choose File > "Revert to Database Backup." When you revert to the backup, any changes you've made since the last backup are lost.