Note the following when importing iCal data.
Make sure the file you want to import contains correct iCal data.
How to import appointments or tasks in the iCal format:
Launch the Calendar or Tasks app.
Select the folder for importing appointments or tasks to in the folder tree.
Click the
icon next to the folder name. Click on .Click on Import into window. Select a file in iCal format.
in theClick on
.