I'm dreaming of a pagan Christmas

Just like in 100 BC

With the White Mare gnashing amongst the mummers

With holly and a sacred tree

I'm dreaming of a pagan Christmas

With oak king, holly king and queen

Let us ring in the bright new year

With misrule and Saturnal cheer.

A crappy song I wrote.

Don't know any of this stuff?  Look it up.

Recommended reading: The White Goddess, by Robert Graves.