This article will show you how to set Calendar permissions on a category level. 

Instructions

1. Navigate to Modules > Content > Calendar
   
   
2. Select your desired category
   
3. Click Actions next to the category name
   
4. Select Modify
   
   
5. Scroll to Permissions and check or uncheck the appropriate permissions for groups
   
   
   • V (View): Only has viewing rights
   • A (Author): Can create and edit unpublished items, needs publishing approval from a Publisher or Owner
   • P (Publisher): Can create and edit items, has publishing power
   • O (Owner): Full rights to the category
6. Select Save Changes