This is interesting. It’s leftover from last year, but I just found out about it today.  Mark Shea has an impressive explanation of how, in fact, Christians were celebrating the birth of Christ on 12/25 each year for decades before there was an official pagan holiday that was celebrated at the winter solstice.  This goes completely against he “common knowledge” that Christians decided to celebrate Christmas on 12/25 in order to co-opt the holiday from the pagans.  Read it here!

H/T to the Curt Jester