Christmas is an annual holiday celebrated by the Christians, on 25th December, in the major part of the world, to celebrate the Nativity of Jesus Christ. Christians believe that Jesus is the son of God, the Messiah sent from Heaven to save the world.
It's a special time when children get presents from family, friends and Santa Claus, or Father Christmas. Christmas cards are also given or sent out prior to Christmas Day.
Christmas Day is a holiday in many, but not all, countries. Many homes have Christmas trees and other decorations in the weeks leading to Christmas Day. Some workplaces hold Christmas parties prior to December 25. Festive activities include exchanging presents, singing Christmas songs, going to parties.