Milliedog
The above was my comment on a post saying that there would be no Christmas if it wasn't for Jesus.....
There would be a winter festival on or about the winter solstice, even without Jesus. It would be a festival of joyousness and renewal, with the knowledge that the darkest day is over and the shorter days and spring are on their way.
Almost every main religion, Christianity, Judaeism, Islam, Hinduism and many of the so called 'pagan' religions, all celebrate the winter solstice in one way or the other.
Christian clebrations are focussed on the way people in the northern hemisphere have always celebrated the solstice with fire, with greenery, and with general jollifications and, like Christmas, was broadly centred around home, family and community. All this would happen whether the celebration was called Christmas and associated with christianity or not.