The Christmas Festival differs as the precise date of the birth and historicity of Jesus are much debated. Christmas, literally meaning the Mass of Christ, is a traditional holiday in the Christian calendar. The festival of Christmas takes place on 25th December, every year to celebrate the birth of Jesus Christ. Christmas is also celebrated as a secular holiday throughout the world, including countries with small Christian populations like India. Various theories of the origin of Christmas exist that give a clear insight into the celebration of Christmas.

The date of Christmas is based on the date of Good Friday, the day Jesus died. Since the exact date of Jesus' death is not stated in the Gospels, early Christians sought to calculate it, and arrived at either March 25 or April 6. Then, wishing to calculate Jesus' birthday, they followed the ancient idea that Old Testament prophets died either an anniversary of their birth or of their conception. In Jesus' case, they reasoned that he died on an anniversary of the Incarnation so the date of his birth would have been nine months after the date of Good Friday-either December 25 or January 6. The date of 25th December became popular.