Why is Xmas on December 25th?

Shouldn’t it be on January 1st?

Okay, so these questions get answered once a year. I’m just posting these three questions because I want people to think a little more about the meaning of the holidays & learn something about them. But also, I forgot the answers.

Because I said so. I couldn’t think of any place else to put it, so here it goes.

Cecil’s thoughts on Why do we celebrate Christmas on Dec. 25?, from The Straight Dope.

And on a related topic, from SDSTAFF Mac, Why is Christmas abbreviated Xmas?