Since many are intent on finding the non-biblical source of our identifying 12/25 as Christ's birth, this may help.
"The Christmas festival was probably the Christian transformation or regeneration of a series of kindred heathen festivals—the Saturnalia, Sigillaria, Juvenalia, and Brumalia—which were kept in Rome in the month of December, in commemoration of the golden age of universal freedom and equality, and in honor of the unconquered sun, and which were great holidays, especially for slaves and children.721
"The name of Brumalia comes from brvma, [ˈbruːma], "Winter solstice", "Winter cold"; a shortening of *brevima, [ˈbrɛwɪma], presumed obsolete superlative form of brevis, later brevissima ("smallest", "shallowest", "briefest")."
Brumalia - Wikipedia, the free encyclopedia
IOW, Brumalia is the source.
Saturnalia 12/17-12/23
Sigillaria 12/23 (the last day of Saturnalia)
Juvenalia maybe 12/24 (the emperor's transition from child to adult)
Brumalia 12/25 the winter solstice
Return of Sol Invictus
PS The winter solstice changes days through the centuries, so presumably these dates would float.
PPS By now, this 12/25 connection to the Roman pagan holidays culminating in Brumalia is long forgotten.
"The Christmas festival was probably the Christian transformation or regeneration of a series of kindred heathen festivals—the Saturnalia, Sigillaria, Juvenalia, and Brumalia—which were kept in Rome in the month of December, in commemoration of the golden age of universal freedom and equality, and in honor of the unconquered sun, and which were great holidays, especially for slaves and children.721
721 The Satumalia were the feast of Saturn or Kronos, in representation of the golden days of his reign, when all labor ceased, prisoners were set free, slaves went about in gentlemen’s clothes and in the hat (the mark of a freeman), and all classes gave themselves up to mirth and rejoicing. The Sigillaria were a festival of images and puppets at the close of the Saturnalia on the 21st and 22d of December, when miniature images of the gods, wax tapers, and all sorts of articles of beauty and luxury were distributed to children and among kinsfolk. The Brumalia, from bruma (brevissima, the shortest day), had reference to the winter solstice, and the return of the Sol invictus."
History of the Christian Church, Volume III: Nicene and Post-Nicene Christianity. A.D. 311-600. - Christian Classics Ethereal Library"The name of Brumalia comes from brvma, [ˈbruːma], "Winter solstice", "Winter cold"; a shortening of *brevima, [ˈbrɛwɪma], presumed obsolete superlative form of brevis, later brevissima ("smallest", "shallowest", "briefest")."
Brumalia - Wikipedia, the free encyclopedia
IOW, Brumalia is the source.
Saturnalia 12/17-12/23
Sigillaria 12/23 (the last day of Saturnalia)
Juvenalia maybe 12/24 (the emperor's transition from child to adult)
Brumalia 12/25 the winter solstice
Return of Sol Invictus
PS The winter solstice changes days through the centuries, so presumably these dates would float.
PPS By now, this 12/25 connection to the Roman pagan holidays culminating in Brumalia is long forgotten.