why christmas is december 25

The exact origins of Christmas being celebrated on December 25th are not entirely clear. However, there are a few theories that attempt to explain the date. One theory is that December 25th was chosen as the date to commemorate the birth of Jesus Christ, who is believed to have been born during the winter months. This date may have been chosen because the Roman Catholic Church already celebrated several festivals around the winter solstice, including the feast of the Nativity of Mary and the feast of the Winter Solstice.