General Roman Catholic Calendar
Wold be nice if some one had the tima to check if it is possible to make one out of this - https://github.com/pejulian/romcal
I wold be happy for that if some one can as i dont have the skills my self to do that.
Short of that you could add this to the config.js for your existing calendar
Now you should have the Catholic liturgical calendar displayed in your calendar module