Sync Calendar with Fantastical
Fantastical is OS X calendar app that provides user-friendly interface for synchronizing with different calendar servers, including CalDAV.
Click Fantastical and select Preferences in drop-down list:
Select Accounts tab. Click "+ Add Account" button. Select Other CalDAV Account:
In the User name and Password fields provide your credentials. Specify CalDAV calendar URL in the Server Address field. Finally, click OK.