What is the oldest account of Christmas celebration in the history? Is there any texts referring about the origin of it?
Looking at this question I see the tradition of Christmas presents, but where did the tradition of Christmas itself come from? Also, what's with the Christmas tree and Santa (or Kris Kringle)?
Where does the modern tradition of exchanging gifts from Christmas comes from? I've heard that it's inspired by a similar tradition the Ancient Romans had on one of their festivals, is that true?