The new beta of Yahoo! Calendar now supports the CalDAV protocol, meaning that sharing and synchronizing with desktop calendaring applications is possible.

iCal has supported CalDAV since version 3.0 shipped with Mac OS X 10.5 Leopard, so it is possible to get it working with Yahoo! Calendar. After completing the following steps, any events that you create in the web-based Calendar will be replicated to iCal, and vice-versa.

What you will need:

• A Yahoo! account. In the example, we use the username yahoouser
• Access to the new Calendar Beta.
• iCal version 3 or above

Step 1:

• In iCal, select the Preferences… from the iCal menu.
• Click on the Accounts icon

• Click on the plus button to create a new CalDAV account
• Enter a description, such as Yahoo! Calendar, your Yahoo! username and password.
• Click the Server Options link and enter the following into the Account URL field:

https://caldav.calendar.yahoo.com

• Click the Add button.

Your Yahoo! Calendar should now be synchronized with iCal, refreshing every 15 minutes: you should see it listed on the left hand side of your iCal window underneath the calendars stored on your Mac.