The selection of December 25 as the date to celebrate Christmas is steeped in both historical speculation and theological symbolism. The day is traditionally recognized as the birth of Jesus Christ, but there is no definitive evidence in the Bible to confirm this exact date. Instead, the choice of December 25 is often thought to be influenced by a combination of Roman pagan festivals and early Christian thought.
One prevalent theory about the choice of December 25 relates to March 25, a date recognized by early Christians as the day of Jesus’ crucifixion. According to ancient Jewish tradition and some Christian interpretations, a prophet of importance would die on the same date as his conception. Thus, if Jesus was believed to have died on March 25, that date would also be when the annunciation occurred—when the Angel Gabriel announced to Mary that she would bear the Son of God. Counting nine months forward from March 25, the date of December 25 is arrived at for Jesus' birth.
Additionally, the timing coincides with Roman pagan festivals, notably Saturnalia, a festival in honor of the god Saturn, held on December 17 and later expanded with festivities through to December 25. The Roman solar feast, Sol Invictus (the "Unconquered Sun"), officially celebrated on December 25 since the reign of Emperor Aurelian in the third century, also shares the date. Some historians suggest that selecting December 25 for Christmas was a way for early Christians to adapt and compete with the popular pagan celebrations.
Thus, the selection of December 25 may reflect a blend of theological symbolism, connecting the crucifixion and conception of Jesus, and practical considerations of aligning with existing festivals. This date helped Christians symbolically link the birth of Jesus with the 'return of the light' and the solstice event, emphasizing themes of light conquering darkness, renewal, and hope. This convergence of themes and timing made December 25 a fitting choice for a celebration that was both deeply meaningful to Christians and culturally adaptable to the broader Roman society.