Don't take "Christ" out of Christmas! That's the rallying cry of many Christians, who become quite frantic over what they view as sacrilege -- removing Christ's holy name from the important holiday, and replacing it with a simple X. A secular X. An impersonal, present-and-Santa-seeking X.
But if we take a closer look, writing "Xmas" isn't a necessarily a slam against the son of God. Far from it. The word "Christ" in Greek is written "Χριστός." Notice anything familiar? The first letter is "X," or chi. Chi is also written as an X in the Roman alphabet. Rather than being an offensive abbreviation for Christmas, "Xmas" is actually a quite logical nickname [sources: Boyett, Bible Suite].