Edit Permissions
To edit permissions for a calendar, go to Administration -> Modules -> Calendars.
1. Select the appropriate Calendar, and click Edit Permissions. The following view will be presented:
2. From the list of unassigned groups, check to add the appropriate permissions.
Note: Read permissions allow user to view the calendar. This includes in search and RSS feeds
Write Permissions allow users to add entries into the Calendar.
3. Select Save and then Finished.