Now that I know I have Viking blood - percentagewise, second only to the Irish in me - I've been wondering about Viking/Norse Christmas traditions.
My brief reading so far points to a number of Christmas traditions that may have horned-hat origins.
The wreath may have grown out of the "sunwheel" - a burning wheel intended to help entice the sun to return. But that link is tenuous,.
The Yule log is a Viking tradition, though. So is decorating evergreen trees. The Vikings also had myths about mistletoe - though as far as I can tell none of them involve kissing. too bad.
One tradition that's not necessarily Christmas related per se is drinking mead. That they did drink mead is a fact, as is the fact that I like a glass of mead. So one of my traditions is to toast Christmas with a glass of honey wine.
Pax et bonum