Calendar categories can be assigned to sub-communities To assign a calendar category to a sub-community, follow these steps:
Click the Community Features menu section to expand it..
On the expanded Community Features menu, click the Sub-Communities link. This will display the Community Editor and list any existing sub-communities.
Click the Calendar link next to the sub-community. This will display the Edit Calendar Category for this Community page.
This page will return a list of the available calendars categories. Check the box next to the Calendar Category that should be available to this sub-community. New calendars categories are added under Site Features / Calendar Events / View Category List.
Click Save to save Calendar categories and return to the Community Editor.