Christmas or Christmas is an annual celebration of the birth of Jesus Christ. The most common celebration is December 25, which is a religious and cultural celebration of billions of people around the world. It is the central feast of the year of Christian Rites, which is prepared for the coming of Christ or the birth of Jesus, and starts the season of Christmas wave. Historically, the season of Christmas wave lasts for 12 days in the west, and reaches its climax on the twelfth night. In some traditions, Christmastide includes an octave. The traditional Christmas narrative, the birth of Jesus, is described in the New Testament, saying that Jesus was born in Bethlehem according to the Messiah's prophecy. When Joseph and Mary arrived in the city, there was no vacancy in the inn, so they were provided with a stable place. The children of Christ were born soon. The angel announced the news to the shepherd, and the shepherd further spread the information. Christmas is a public holiday in many countries and regions in the world. The vast majority of Christians celebrate Christmas in religion and many non Christians in culture, and it is an integral part of the holiday season, while some Christian groups refuse to celebrate. In some countries, Christmas focuses on December 24, not December 25, compared to December 25.

In various countries, Christmas related celebrations are a mixture of pre Christian, Christian and secular themes and origins. Modern customs popular in holidays include gift giving, completing the advent calendar or wreath, Christmas music and Carols, lighting Christine gler, watching the drama of the birth of Jesus, exchanging Christmas cards, church services, special meals and various Christmas decorations, including Christmas trees, Christmas lights, scenes of the birth of Christ, wreaths, wreaths, mistletoe and winter Green trees. In addition, several closely related and often interchangeable characters, such as Santa Claus, Christmas father, Saint Nicholas and christkind, are all related to the gifts given to children during Christmas and have their own traditions and knowledge. As gift giving and many other aspects of Christmas Day involve more and more economic activities, holiday has become an important activity and key sales period for retailers and enterprises. Over the past few centuries, the economic impact of Christmas has grown steadily in many parts of the world.