Once you have begun the process of subscribing to a Calendar, you can choose to subscribe via iCal.
1. From the Subscription page, select the iCalendar option and click Subscribe.
2. When prompted to choose if you want to allow this website to open a program on your computer. Click Allow.
3. When prompted to choose if you want to add this Internet Calendar to your email program (in this example, Microsoft Outlook) and subscribe to updates.
4. Optionally, click Advanced to open a Subscriptions dialog box and customize the settings for your subscription on your email program.
5. Click Yes to add the calendar or calendars to your email program.