why is christmas celebrated on dec 25

Christmas is celebrated on December 25th because it is believed to be the day Jesus Christ was born. This date was chosen by the early church fathers as a way to mark the celebration of Christ's birth and to replace the pagan holiday of Saturnalia. It is also believed that the date may have been chosen because it coincides with the winter solstice, which was already a time of celebration for many ancient cultures. Over time, the tradition of celebrating Christmas on December 25th has become firmly established in Christian culture.