The most notable festival of Sol Invictus was held on December 25th, known as the "Dies Natalis Solis Invicti" (the birthday of the unconquered sun). This celebration marked the winter solstice and the rebirth of the sun.
The cult of Sol Invictus brought together various solar deities from different cultural backgrounds under a single, Romanized form, reflecting the empire's diversity.
This later became significant in Christianity as the chosen date for Christmas, celebrating the birth of Jesus Christ.
The cult of Sol Invictus continued until the rise of Christianity in the Roman Empire. The transition from pagan sun worship to Christianity reflected broader shifts in religious and cultural practices in the empire. The influence of Sol Invictus is still seen in certain Christian iconographies and traditions.
