Estonian families will usually take a nice sauna on Christmas Eve. Now this is a tradition I can 100% get behind.
Mari Lwyd (Wales)
In this random tradition that adds nothing to the Christmas spirit whatsoever, certain rural areas in Wales will pick a random villager to perform the ritual of Mari Lwyd. They walk around with a horse skull on a pole and the other villagers sing traditional songs. White sheets cover the pole and the person holding it, and sometimes they go the extra mile and spring-load the horse skull so it can be used to snap at people. Because why not.