When I was a gawky teenager, I systemically searched through library books to hunt for the culprit who put the bloody "X" in Xmas and it eventually turned out to be the Greeks. Because X is how they write "Christ" in Greek and writers including people who transcribed the Bible, have been using 'X' as a convenient abbreviation of that since at least the 3rd and 4th centuries. Just a quick and simple tip. Greeks are really a bunch of lazy bums, aren't they?
