The New Catholic Encyclopedia says that ""the Nativity feast was instituted no earlier than 243 [C.E.],"" more than a century after the last of the apostles died.
I-New Catholic Encyclopedia ithi, " uMkhosi wokuzalwa kukaJesu wasungulwa ngemva kuka-243 [C.E.], " ngemva kweminyaka engaphezu kweyikhulu umphostoli wokugcina ashona.