x-mas is just short for christ in Greek.so we use the x for christ in Christmas.Derived from the word ???S??S, translated as Christos, which is Greek for Christ
Christmas is used for the reason for the season Christ's Birthday. X-mas is considered blasphemous to Christ. That would be like calling you x instead of your name. Hope this helps!
At 1st i thought it does not make any difference. But now, after the explanation you gavent me, makes me understand the different between Christmas & X-Mas. Thanks alot.