The New England Folklorist is on to something:

I wanted to read something wintry to put me in the holiday spirit, so I picked up a collection of Icelandic folklore: J.M. Bedell’s Hildur, Queen of the Elves, and Other Icelandic Legends (2016). I thought, “Iceland is cold and snowy, so I’m sure these legends will put me in a Christmas mood.”

Although it doesn’t always work out that way, this time I was right. Not only are these legends set someplace icy and dark, many of them are explicitly about Christmas. However, unlike the stories we tell about Santa, Rudolph, and Mrs. Claus, these Icelandic stories are quite spooky. Apparently really terrible things happen in Iceland during Christmas. Malicious supernatural beings are very active there in late December.

For example, in “The Magicians of the Westmann Islands,” a group of magicians who have fled to an offshore island to escape the plague threaten to kill one of their fellow sorcerers by Christmas Eve if he doesn’t return to them. The lone sorcerer has fallen in love with the last woman in Iceland (everyone else has died from the plague) and refuses to return to the magicians. They send an assortment of demons to kill him on, but happily his beloved defeats them with help from her dead grandfather. I don’t know about you, but that’s not the type of story I usually hear at Christmas here in the United States.

There’s more, of course, so do read it all.