Well sort of. Christian holidays were originally based on the same cycle as the Jewish Holidays but then the church fathers didn't like having to go ask the nea

Well sort of. Christian holidays were originally based on the same cycle as the Jewish Holidays but then the church fathers didn't like having to go ask the nearest Rabbi when their holidays were and tried to do it algorithmicly with absolutely no consoltation with anyone that knew anything about time keeping or astronomy and invented the ecclesiastical equinox (always March 21), and ecclesiastical full moon, neither of which bares relation to any astronomical event.