My English is not so good but I try it.
Is it possible to make this with Community Builder: For a new site I like an inbox for users on the front.
In the inbox messages have come reports of a calendar.
First is available on a monthly basis, then it's on a separate page.
Where a precise date is finished, I want him in the calendar.
The date arrived, the user should receive a message in his inbox.
Now I want that a user can only subscribe to certain categories.
And thus only receive a notification of the categories where the person has subscribed to.
nant