Daddy why do we have Christmas?
Well son it’s like this. Every year you have a birthday and you receive presents. We give you presents because you are very special to us and we want to celebrate the day you were born. Well, Christmas marks the birthday of another child who is very special to all of us so we give each other presents to celebrate His birthday.

And what is the child’s name daddy?
His name is Jesus Christ son He was born 2000 years ago, and that’s why we call it Christmas.