241 - Christmas

I always knew that Christmas was formally a pagan holiday and that the pagans celebrated on the solstice. But why the 25th instead of the 21st? Well wikipedia comes through again.

"It was therefore the day the Sun proved itself to be "unconquered" despite the shortening of daylight hours. (When Julius Caesar introduced the Julian Calendar in 45 BC, December 25 was approximately the date of the solstice. In modern times, the solstice falls on December 21 or 22.)"

Link - Christmas