About the Calendar app
The BlackBerry Calendar app on your BlackBerry device combines the calendar info from the email and social networking accounts that you add to your device. The Calendar app presents the info so that you can view all your meetings, appointments, tasks, alarms, and events in one place.
If you subscribe to public calendars, such as movie theater calendars or school calendars, the events from those calendars can also appear in the Calendar app.
Even if you don't add any accounts to your device, you can still use the Calendar app to create and manage meetings, appointments, and events.