This is great

[anon_icelander]

Sung to the tune of.. you'll figure it out:

Gods rest ye, Unitarians, let nothing you dismay;
Remember there's no evidence there was a Christmas Day;
When Christ was born is just not known, no matter what they say,
O, Tidings of reason and fact, reason and fact,
Glad tidings of reason and fact.

Our current Christmas Customs come from Persia and from Greece,
From solstice celebrations of the ancient Middle East.
This whole darn Christmas spiel is just another pagan feast,
O, Tidings of reason and fact, reason and fact,
Glad tidings of reason and fact.

There was no star of Bethlehem, there was no angels' song;
There couldn't have been wise men for the trip would take too long.
The stories in the Bible are historically wrong,
O, Tidings of reason and fact, reason and fact,
Glad tidings of reason and fact!