The Calendar program on your iPad makes it easy for you keep on top of your appointments and events. In addition to keeping your own calendar(s), you can also subscribe to other people’s calendars.
You can subscribe to calendars that meet the CalDAV and iCalendar (.ics) standards, which are supported by the popular Google and Yahoo! calendars, or iCal on the Mac. Although you can read entries on the iPad from the calendars you subscribe to, you can’t create new entries from the iPad or edit the entries that are already present.
To subscribe to one of these calendars, follow these steps:
On the Home screen, tap Settings.
Tap Mail, Contacts, Calendars.
Tap Add Account→Other.
Choose either Add CalDAV Account or Add Subscribed Calendar.
Enter the URL of the calendar you want to subscribe to.
If prompted, enter a username, password, and optional description.
The Description field can be modified to include any description you would like.
Tap Next to advance.
After you subscribe to a calendar, it appears just like any another calendar on your iPad.
Calendars you subscribe to are read-only. In other words, you can’t change existing events or add new ones.