I've been trying to get Moriarty into the spirit of the season over at Dear Multiverse, but his situation raises some interesting questions. Namely, what would he celebrate? There is Christianity in his world, but it is frowned upon, if not outright illegal (consider the scene at the theater where the priest character is beaten to death with his own crucifer).
Then, I found
this, a collection of Victorian-style cards, poems, and songs inspired by the Cthulhu Mythos. It seemed to fit the political and aesthetic sensibilities of his world so well.
So...Merry C’thrishm’sh to all!