sol invictus why we celebrate christmes the 25th of december ancient romans

How Did December 25th Become Christmas Day?

The celebration of Christmas on December 25th is a tradition that intertwines historical events, theological reasoning, and cultural adaptation. While the exact date of Jesus Christ’s birth remains unknown, the selection of December 25th as the day to commemorate this event has evolved over centuries.


Early Christian Celebrations

In the initial centuries following Christ’s death, early Christians did not celebrate his birth. The primary focus was on his resurrection, observed during Easter. It wasn’t until the 2nd century that discussions about the date of Jesus’s birth began to surface. By the 4th century, the Western Christian Church officially designated December 25th as the Feast of the Nativity.

Encyclopedia Britannica


Theories Behind December 25th

Several theories have been proposed to explain why December 25th was chosen:

  1. Winter Solstice Connection: In the Roman calendar, December 25th corresponded with the winter solstice, a time when days began to lengthen. This period symbolized the triumph of light over darkness, paralleling the Christian belief in Jesus as the “Light of the World.” Wikipedia
  2. Roman Festivals: The date coincided with Roman pagan festivals such as Saturnalia and Dies Natalis Solis Invicti (Birthday of the Unconquered Sun). By aligning Christmas with these existing celebrations, early Christians might have aimed to facilitate the acceptance of Christianity within the Roman Empire. Got Questions
  3. Annunciation Theory: Another perspective suggests that early theologians believed Jesus was conceived on March 25th, the date of the spring equinox. Adding nine months leads to a December 25th birth. This calculation linked the creation and redemption themes, emphasizing Jesus’s divine conception and birth. Wikipedia

Establishment of the December 25th Tradition

The earliest recorded celebration of Christmas on December 25th dates back to 336 AD during the reign of Roman Emperor Constantine, the first Christian emperor. His endorsement played a significant role in formalizing this date within the Christian liturgical calendar.

Why Christmas


Fun Fact

The term “Christmas” originates from the Old English phrase “Cristes Maesse,” meaning “Christ’s Mass.” This term was first recorded in 1038 and reflects the centrality of the mass (religious service) in the celebration of Jesus’s birth.


In conclusion, the designation of December 25th as Christmas Day is the result of a complex interplay of theological interpretations, cultural practices, and historical developments. This convergence has led to a universally recognized date that continues to be celebrated by millions around the world.