android.permission.WRITE_CALENDAR
  - add or modify calendar events and send email to guests without owners' knowledge
 
  - Allows the app to add, remove, change events that you can modify on your phone, including those of friends or co-workers. This may allow the app to send messages that appear to come from calendar owners, or modify events without the owners' knowledge.
 
Belongs to: 
android.permission-group.PERSONAL_INFO
  - Your personal information
 
  - Direct access to information about you, stored in on your contact card.