The Greek Origin of Xmas
Where did Xmas come from?
Some transliterations of Greek spell Christos (Jesus Christ) as Xristos. The “X” stood in for Christos.
While in modern times we regard Xmas as a kind of slang, it was originally considered to be a perfectly respectful abbreviation, especially as it included a form of the cross in the shape of the “X”.
UPDATED December 2009 >
The word “Christmas” is often abbreviated to “Xmas”, the “X” being an uppercase Greek letter Chi, which is the first letter of “Christos” in Greek. The abbreviation is widely but not universally accepted, some view it as demeaning to the name of Christ.