Apple iCal: How to export iCal calendar?

I. Export all iCal calendars:
1. From the File menu, choose Export -> Archive iCal.
2. Select localization on your hard drive.
3. Export the file. It will be saved as an .icbu file.

II. Export individual calendar(s)
1. In iCal’s sidebar, select the calendar you want to back up.
2. From the File menu, choose Export -> Export.
3. Select localization on your hard drive.
4. Save the file. It will be saved as an .ics file.
5. Repeat the process for each calendar you want to back up or in the first step select all calendars to export.