Wiki suggests “One theory to explain the choice of 25 December for the celebration of the birth of Jesus is that the purpose was to Christianize the pagan festival in Rome of the Dies Natalis Solis Invicti means “the birthday of the Unconquered Sun”, a festival inaugurated by the Roman emperor Aurelian (270–275) to celebrate the sun god and celebrated at the winter solstice, 25 December. According to this theory, during the reign of the emperor Constantine, Christian writers assimilated this feast as the birthday of Jesus, associating him with the ‘sun of righteousness’.” And since Jesus is the “Son” of God I found this interesting.
Many popular customs associated with Christmas developed independently of the commemoration of Jesus’ birth, with certain elements having origins in pre-Christian festivals that were celebrated around the winter solstice by pagan populations who were later converted to Christianity. These elements, including the Yule log from Yule and gift giving from Saturnalia, became syncretized into Christmas over the centuries.
The first recorded date of Christmas being celebrated on December 25th was in 336AD, during the time of the Roman Emperor Constantine (he was the first Christian Roman Emperor). A few years later, Pope Julius I officially declared that the birth of Jesus would be celebrated on the 25th December.
Love history, the research on this was endless. It is non the less a day to celebrate Christianity, love of God and his only Son, Jesus, and all he brings to this earth. AMEN