In window number 8 of Erik's musical Advent calendar you'll find a real pop masterpiece. The Three Wise Men was a pseudonym for our friends in XTC when they released their 1983 Christmas single "Thanks For Christmas". It's got all the hallmarks of a classic XTC single as well as being about as Chrismassy as a song comes.
PS. The composers of the song are (wisely) listed as Kaspar, Melchior and Balthazar and the production credits go to The Three Wise Men and The Good Lord.