why december 25 is the christmas day

According to tradition, the birth of Jesus Christ was on December 25th. In the early centuries of Christianity, this date was not celebrated as a special day. However, as Christianity spread throughout Europe, it became common to celebrate the birth of Jesus. The day of his birth was chosen as a day of celebration because it was thought to be the day he was born, and because it was close to the winter solstice, which was a time of year that was important to many cultures. The date December 25th became the official date for Christmas in the fourth century AD.