Yes, I know that it is an arbitrary date. The Bible gives no indication of the actual day of the Incarnation.
Yes, I know that the pagans celebrated the winter solstice around this time.
Yes, I know that there was no Christmas tree near the manger.
Yes, I know that we don’t know the actual location of the stable in Bethlehem.
Yes, I know that there may have been more or less than three wise men.
Yes, I know that there is no indication that Mary rode a donkey.
It doesn’t matter.
(Gal 4:4 KJV) But when the fulness of the time was come, God sent forth his Son, made of a woman, made under the law,Jesus was born. Picking December 25 is at most a 1/365 chance of being correct but I also know that the odds of getting into heaven without Jesus are much worse.
If you have a better day then pick it and I will be glad to encourage you. The Orthodox churches have decided to celebrate in January. More power to them. If you like a summer celebration, go for it.
And Merry Christmas or whatever you choose to call it.
homo unius libri