why is christmas celebrated on the 25th december

Christmas is celebrated on the 25th of December because it is believed to be the day of Jesus Christ's birth. This date has been observed as a religious holiday in Christianity since the 4th century AD and has since become a global celebration of the birth of Jesus Christ. Some historians believe that the celebration of Christmas on December 25th may have originated from older pagan winter solstice festivals, but this is not widely accepted as the primary reason for the date.