About the Calendar app

You can use the 
BlackBerry Hub+ Calendar
 app to create and manage events, such as appointments and meetings. 
The calendar from your email account will appear in the app. If you don't want to see calendars associated with an account, you can hide those calendars. 
If you subscribe to public calendars, for example movie or school calendars, the events from those calendars also appear in the 
BlackBerry Hub+ Calendar
.