Christmas lights use enough electricity to power the entire country of El Salvador for an entire year
In Ireland, if a child doesn't receive any clothing for Christmas, the monstrous YuleCat will eat them
Christmas is celebrated on the 25th December because Pope Julius I wanted to appropriate the existing pagan celebration of Sol Invictus that was already celebrated on that day.
The 12 days of Christmas are actually supposed to start on Christmas Day instead of leading up to it.
Christmas is also exactly the date of the birth of the Persian savior Mithra, who, as an incarnation of eternal light, was born the night of the winter solstice then dated December 25) at midnight
Christmas ham, originally a pagan tradition, was endorsed by the Catholic Church as a test of truthful conversion from Judaism.
Christmas' "x" in the abbreviation Xmas comes from the fact that "X" in Greek is the first letter of the word Christos, or Christ.