Contacts / calendar app: selection which birthday entry to generate

I have two different address books where in many entries a birthday information is given. In the overall calendar all birthday information from all addr. books are shown. So far nothing special.
It would be nice to have a tick somewhere eiether on addressbook level or on addressbook item level which birthday record should generate an birthday entry in the birthday calendar.
The goal is only to see the birthday entries in my calendar I want to see (per default all / new records).