Why Is Christmas Celebrated on December 25?
Why is Christmas celebrated, and why December 25? A neutral guide to the origin of the date, the January 6–7 difference and Christmas vs New Year.
Why is Christmas celebrated, and why specifically on December 25? The answer to these questions, asked every December, reaches back into both history and the calendar. Christmas is the festival that, in the Christian tradition, commemorates the birth of Jesus Christ; yet the date of December 25 comes not from the texts that tell the nativity story but from the tradition of later centuries. In this article, as an independent guide, we look neutrally at where the date came from, why other days such as January 6–7 are celebrated in different traditions, and the common confusion in Turkey between Christmas and New Year.
Why is Christmas celebrated?
In short: Christmas is celebrated to commemorate the birth of Jesus. Of the four Gospels, Luke and Matthew tell this nativity story; Luke 2:7 describes Jesus coming into the world in humble circumstances, laid in a manger. We covered the nativity story itself — where and how Jesus was born — in a separate article. The What Is Christmas? guide provides those details. Here our focus is a different question: why did the festival settle on December 25?
Why is Christmas celebrated on December 25?
The Bible gives no precise day or month for the birth of Jesus. December 25 became established in church tradition in Rome around the 4th century AD. There are two main explanations for why this date was chosen:
How far each of these explanations was decisive is debated; what is certain is that the date is a traditional convention rather than information given by the text. The focus of the nativity story is not a calendar day but the event itself: the good news, the shepherds and the visit of the wise men from the east (Matthew 2:1). Micah 5:2 speaks of a ruler to come from Bethlehem; Christian tradition associates this with the birth of Jesus.
In short, December 25 is not a "record of a birthday" but a day of remembrance. This distinction matters: even though the date itself is uncertain, the event remembered — the coming into the world of a child in humble circumstances and the hope this carries — remains the same in every tradition. The power of Christmas comes less from its place in the calendar than from the story it tells. The different calendars and traditions, in turn, show how far across the map and across cultures this story has spread over the centuries.
January 6–7: Christmas in different traditions
Not all churches celebrate Christmas on December 25. Some Eastern Orthodox churches that use the Julian calendar (for example, the Russian tradition) mark the day corresponding to December 25 on January 7 in today's Gregorian calendar. In the Armenian tradition, the birth and baptism of Jesus have long been celebrated together on January 6. So the different dates reflect not different beliefs but different calendar and tradition choices; all commemorate the same birth event. Prophetic words about a child to be born, such as Isaiah 9:6, are also read alongside this story in many traditions.
January 6 is also known in many Western traditions as "Epiphany"; this day remembers the visit of the wise men from the east to Jesus and the opening of the news of the birth to a wider world. In this way, in many places, Christmas is experienced less as a single day than as a season stretching from late December into early January.
The Christmas service and its customs
The Christmas service takes different forms by tradition. Throughout December many churches observe a period of preparation called "Advent"; the services held on Christmas Eve or morning stand out with hymns, candlelight and the reading of the nativity story. Many familiar customs accompanying the festival — the tree, gifts, carols — were added later in various cultures and are not part of the nativity account. So although the visible face of Christmas changes from country to country, at the center of the worship stands always the same story.
The origin of the tree custom goes back to Central Europe, to the idea that trees staying green through winter were symbols of life and continuity; in time it became a tree decorated in homes. Carols, candles and star ornaments also spread by being linked to elements of the nativity story — the light piercing the darkness of the night, the star pointing to Bethlehem. So much of the visual world that feels familiar today is less the story itself than a frame cultures have woven around it.
Where does Santa Claus come from?
One of the figures most identified with Christmas is Santa Claus — but his origin is neither the North Pole nor a sleigh; it is Anatolia. The Santa Claus tradition rests on Saint Nicholas, who lived around the 3rd–4th century AD in the district of Demre (formerly Myra) in today's Antalya, Turkey. Nicholas's historical core is limited to his being bishop of Myra; the stories of his helping the poor in secret and looking after children rest largely on later legend. Over the centuries this figure of the saint gave rise, by way of the Dutch "Sinterklaas," to the modern "Santa Claus," and passed into Turkish as "Noel Baba"; the custom of giving gifts came to be associated largely with the generosity attributed to him. So the roots of the figure often regarded as "foreign" in Turkey actually lie in this land. This detail also nicely shows how far across the map the cultural layers of Christmas have spread.
The confusion between Christmas and New Year in Turkey
A common situation in Turkey is that Christmas and New Year are taken to be the same thing. Yet they are different days. Christmas is a religious day commemorating the birth of Jesus, celebrated on December 25 (in some traditions on January 6–7). New Year, on the other hand, is a largely secular day celebrated on January 1 across much of the world as the start of the new year. The main reason for the confusion is that in Turkey the decorated tree, the lights and the custom of gifts have largely been carried over to New Year. Yet these visual elements originally belong to Christmas: the pine known as the "New Year tree" comes, as a tradition, from Christmas. Distinguishing the two days makes both celebrations clearer to understand; this is not a matter of right or wrong but of clearing up a conceptual mix-up.
This distinction does not mean belittling either celebration. Whether a table is set to welcome the new year or Christmas is marked as an act of worship, both days can be lived out with their own meaning. What matters is to approach them knowing which tradition celebrates what, without mixing them up; and that, in its own small but meaningful way, is a part of respect for different beliefs and cultures.
Advent: reading toward Christmas
If you want to follow the story on which Christmas rests and the long expectation leading up to it, the Advent — 24 Days to Christmas reading plan offers one chapter a day through December: a journey from the first promises to the prophecies and on to the birth in Bethlehem. If you want to read the nativity account directly, chapter 2 of the Gospel of Luke is the best place to start. For a detailed introduction to the festival, you can turn to our What Is Christmas? guide. All of these resources are free and ad-free on this site.