It's Christmas?

Dec 25 272

First official public celebration of Dies Natalis Invicti Solis, a pagan Roman holiday that was later co-opted by Christians to celebrate the birth of their favorite Jew. Turning the holiday into "Christmas" (in 336 AD) was part of a pattern of the church stealing various pagan festivals and feast days.

According to the scholiast on the Syriac bishop Jacob Bar-Salibi, writing in the twelfth century:

"It was a custom of the Pagans to celebrate on the same 25 December the birthday of the Sun, at which they kindled lights in token of festivity. In these solemnities and revelries the Christians also took part. Accordingly when the doctors of the Church perceived that the Christians had a leaning to this festival, they took counsel and resolved that the true Nativity should be solemnised on that day." (cited in "Christianity and Paganism in the Fourth to Eighth Centuries", Ramsay MacMullen. Yale:1997, p155)