You learn something new every day. For instance, the "X" in "X-mas" is short for "Xpiotoc" (kind of - I don't know how to type the Greek letters, so I used approximations). You see...
"Christ is the English representation of the Greek word Xpiotoc (transliterated as Khristos), which means anointed. The Christian religion takes its name from Christ, as a title given to Jesus of Nazareth, always capitalized as a singularly descriptive title meaning literally The Anointed One. In English translations of the New Testament, the Greek Inoouc Xpiotoc, and related phrases, are almost invariably translated Jesus Christ or Christ Jesus, leading to the common, though inaccurate, perception that 'Christ' was the last name of Jesus of Nazareth. The part of Christian theology focusing on the identity, life, teachings and works of Jesus, is known as Christology." (taken from the good ol' semi-reliable Wikipedia)
And, in the spirit of the season, here's another "I did not know that" factoid: "In 1966, during his annual two weeks of active duty, [Jimmy] Stewart requested a combat assignment and participated in a bombing strike over Vietnam."
George Bailey bombed Charlie! Oh, schnap!