The celebration of the birth of the middle-eastern child of a homeless teenage mother.
A tradition manipulating you to the point where you' re going into debt just to show someone you love them.
If they loved you then you wouldn't need to (go into debt), I don't go into debt for Christmas or anything else.
They never had it before Jesus was born.
I wonder what they had in them days before
That would be the pagan feast of the winter solstice....
Then Christianity kind of stole the date and the festival for this Jesus bloke, albeit centuries after ''the birth' long after 'the miracles', etc. could be proven or disproven to be nothing but folklore.
(Edited to add a bit for clarity)