There's a new Christmas story by Charles Stross, set in his Laundry universe of secret-agents / institutional government bureaucracy / Lovecraftian indifferent cosmic monsters: "Overtime". Reason for rejoicing!

Other Christmas/fantasy/science fiction stories I adore (and read yearly):

Greg van Eekhout's "In the Late December", also listenable at Escape Pod.

Elizabeth Hand's wonderful novella "Chip Crockett's Christmas Carol," from the late lamented Sci Fiction, but still available serialized on Hand's journal: Part one, Part two, Part three, Part four, Part five, Part six, Part seven, Part eight, Part nine, Part ten, Part eleven.

I also re-read Connie Willis's "Miracle", my favorite of her many fine Christmas stories, which I don't think is (legitimately) available online.

Got any favorites you'd like to share? (I'll also accept Solstice stories, Mithras/Invictus birthday stories, Hanukkah stories, Kwanzaa stories, Winter Festival stories, etc. etc...)