Google or Android Users: Just click on the Google button (not the link) of the calendar you'd like to subscribe to.

iPhone users:

1. Copy the link below the Google button of the calendar you'd like to subscribe to.
2. Email it to yourself.
3. Open the email on your phone and click the link to subscribe.

iCal Users:

1. Copy the link below the Google button of the calendar you'd like to subscribe to.
2. In iCal, click on the "Calendar" menu then click "Subscribe...".
3. Paste the link in the field and click "Subscribe".