It is now the custom for every Catholic diocese, or, in cases where the calendar followed is substantially identical, for a group of dioceses belonging to the same province or country, to have a "Directory" or "Ordo recitandi" printed each year for the use of all the clergy.
For the secular clergy the calendar of the Roman Missal and Roman Breviary, apart from special privilege, always forms the basis of the "Ordo recitandi".