0_Apprentice
I like the holidays.  I particularly like Christmas. How about you? 
1_Wizard
Yes me and billions across the world celebrate this special holiday!
0_Apprentice
How did the Christmas holiday start? 
1_Wizard
It is based on the Christian narrative of the birth of Jesus in Bethlehem.
0_Apprentice
When did Christmas become a 25 December celebration? 
1_Wizard
Jesus's exact birth is unknown but by the 4th century the church had placed Christmas on Dec 25.
0_Apprentice
When did it become so commercialized? 
1_Wizard
Really only over the past century or so did the exchanging of present become a major tradition.