What I learned about Christmas this lesson

I learnt that the Bible don't even say something about that Jesus was born on the 25th of December. So that is probably just something that someone made up.
I also learnt that the Christmas we have today with Christmas trees and Christmas cards are from the 1800s. It was a family in Great Britain, I think, that started with the big tree. And when it was published  in the paper all the others started to do the same.