To subscribe with Apple iCal, iPhone, Outlook or if your browser is setup to accept the webcal protocol:
Click on the link for the subscription you want.
For Apple iCal, Make sure to set the "Auto Refresh" to every day.
To subscribe in Google calendars:
Copy the address of the subscription you want to your clipboard.
Go to google calendar, click on "Add" on the left menu under "Other Calendar" and select "Add by URL"
paste the address and click "Add Calendar".
To subscribe in Yahoo calendar:
Copy the address of the subscription you want to your clipboard.
Click on the gear icon under the Subscribed section on the left menu and select "Subscribe to other calendars"
paste the address and click "Continue".
To subscribe in Windows Live/Hotmail:
Copy the address of the subscription you want to your clipboard.
In the Calendar View, click on Import.
Click on Subscribe
Paste the address
Under Calendar URL, paste the url and click on "Subscribe".
Subscribe to a calendar feed to get the latest event information directly in your calendar.