The Christmas story, also known as the Nativity story, tells the tale of the birth of Jesus Christ. It is an important part of the Christian faith and is celebrated every year on December 25th. The story begins with Mary, a young woman who is engaged to be married to Joseph, being visited by the angel Gabriel. The angel tells her that she will become pregnant with the Son of God. Joseph is initially reluctant to believe this news, but eventually accepts the situation and the two are married.