Select the Calendar tool from the Tool Menu in your site.
Note: If you do not see the Import Events option, you may need to check the Permissions for the Calendar to see if the Import Events permission is enabled for your role in the site.
Select the type of calendar file you are importing (Generic calendar import (comma-separate values), iCalendar, or Microsoft Outlook), and then click Continue.
Click the Choose File button to browse for and select your file, and then click Continue.
Note: Your import file must be in a specific format. For example, if you selected the generic calendar import option, you will see a link for a Generic Import Template that you can download to view an example of the correct import file format.
You will now see a preview of the items to be imported. Verify that all the event information looks correct.