Christmas is my favorite Holiday. I never joke with December 25 as the birthday of the Lord Jesus. 
Are you a christian yourself?
Of course i am. If i am not why would i be celebrating a  feast central to the Christian liturgical year
Im an Atheist as I dont believe there is enough proof out there for me to believe.
Neither was there any reasonable proof on Evolution. However Abrahamic monotheistic religion based on the life, teachings, and miracles of Jesus of Nazareth is real
I don't think you can say for certain that its all real.
There are written proves about the  Philosophy of the religion and also the concepts involved in the religious traditions.
But whats to stop me making something up right now and writing it down for people in 2000 years to come along and believe?
Most of the sciences discovered centuries back were believe in the same way.  Religion is designed such that it can be carried out dispassionately by those who identify as believers or non-believers.