Favorite anime of the Holidays?

It's Beginning to Look Alot Like Christmas and there is a lot of anime that gets people into the holiday season so I'm asking what is your favorite episode or just OVA of an anime that gets you into the holiday season?

Amagami SS. It is literally just about a guy (you, if you consider that it is based on a dating sim) worrying about getting a girlfriend to hang out with around Christmas simply because he was stood up by his date the last Christmas date he went on. And, because of the type of series it is, every time the main character gets the girl, boom, we get the beginning with a different girl and nobody remembers a thing.