I know Christians of the past tended to take their Lent penance/fast much more earnestly than most do today! What if there was a Ramadan like fast/penance which all Christians were required to perform to this very day.
Would it bring the various Christian sects closer together, would it make for more disciplined Westerners in other aspects of their lives? Would it increase church,( whichever one you belong to) authority! One cannot help but admire Islamic people doing Ramadan, it's a tough enough obligation!