I like the holidays.  I particularly like Christmas. How about you? 
Yes me and billions across the world celebrate this special holiday!
How did the Christmas holiday start? 
It is based on the Christian narrative of the birth of Jesus in Bethlehem.
When did Christmas become a 25 December celebration? 
Jesus's exact birth is unknown but by the 4th century the church had placed Christmas on Dec 25.
When did it become so commercialized?
religious observances such as a midnight Mass or Vespers on Christmas Eve, the burning of a Yule log, and the giving and receiving of presents. Along with Easter, Christmas is one of the most important periods on the Christian calendar, and is often closely connected to other holidays at this time of year, such as Advent, the Feast of the Immaculate Conception, St Nicholas Day, St. Stephen's Day, New Year's, and the Feast of the Epiphany.
Geographical variation.
Geographical variation Africa.
Geographical
the celebration of the death and rebirth of the Sun and is one of the eight sabbats on the wheel of the year.
- Christmas Eve (24 December) – Day before Christmas. Traditions usually include big feasts at night to celebrate the day to come. It is the night when Santa Claus delivers presents to all the good children of the world.
- Christmas Day (25 December) – Christian holiday commemorating the birth of Jesus. Traditions include gift-giving, the decoration of trees and houses