The Origin of Christmas: From Jesus’s Birth to the Modern Celebration

In 354 AD, a Roman scribe completed a calendar. In the document that would later become known as the Philocalian Calendar, a brief line of Latin appeared beside December 25th — “natus Christus in Betleem Judeae,” meaning “Christ was born in Bethlehem of Judea.”^[10] It is the oldest surviving record to explicitly assign Christmas to December 25th.

Yet something is puzzling. The Bible itself never mentions the date of Jesus’s birth. According to Luke’s Gospel, shepherds were tending their flocks outdoors that night — something virtually unheard of during a Palestinian winter.^[5] How and why did December 25th become Christmas? And through what winding path did a fourth-century bishop’s secret gift of gold to three impoverished sisters become the red-suited Santa Claus?

The Gospel Accounts of Jesus’s Birth

The Stable in Bethlehem: The Records of Matthew and Luke

The story of Jesus’s birth is recorded in two Gospels of the New Testament: the Gospel of Matthew and the Gospel of Luke. Yet the two accounts differ in their emphases.^[1]

Luke’s Gospel records that Joseph and Mary traveled to Bethlehem due to a census ordered by the Roman Emperor Augustus.^[2] Because there was no room at the inn, the infant Jesus was born in a stable and laid in a manger, wrapped in swaddling clothes. That night, an angel appeared to shepherds keeping watch over their flocks in nearby fields and announced the birth of the Messiah; the shepherds hurried to the stable and paid homage to the child.^[2]

Matthew’s Gospel tells the story from a different perspective. Wise men from the East — the Magi — who studied the stars, saw a celestial sign heralding the birth of a new king and set out on a long journey.^[1] They visited King Herod in Jerusalem to ask where the “King of the Jews” had been born, and then traveled to Bethlehem, where they presented the infant Jesus with gifts of gold, frankincense, and myrrh.^[1]

The Shepherds and the Magi: Not the Same Night

Interestingly, many people assume the shepherds and the Magi visited the infant Jesus on the same night, but biblical scholars generally hold that the two events were separated by a significant gap in time.^[3]

The shepherds in Luke’s account came on the very night of Jesus’s birth, whereas the Magi in Matthew’s account find Jesus in a “house” — not a stable. Given the account of the flight into Egypt and Herod’s command to “kill all boys two years old and under,” scholars estimate that the Magi’s visit took place within at most two years after the birth.^[3]

The Bible also does not specify the number of Magi. The tradition of “three wise men” arose because they brought three gifts — it is an interpretive convention, not a scriptural statement.^[3]

The Star of Bethlehem: A Historical Puzzle

The Star of Bethlehem mentioned in Matthew’s Gospel has long captivated scholars.^[4] Various hypotheses have been proposed to explain its nature.

Candidates include astronomical phenomena such as Halley’s Comet (12 BC), a conjunction of Jupiter and Saturn (7 BC), or a nova.^[4] Some scholars interpret the star as entirely theological or symbolic in character. Whatever the case, the Star of Bethlehem became one of the most important symbols in Christmas iconography.

The Debate Over Jesus’s Actual Birth Date

December 25th Is Not in the Bible

Nowhere in the New Testament is a date given for Jesus’s birth.^[5] The Gospels record the fact and circumstances of the nativity, but mention no specific day or month.

When scholars piece together various biblical clues, many conclude that a December birth is actually unlikely. Luke’s Gospel states that shepherds were in the fields at night watching over their flocks.^[2] In the Palestinian region, shepherds typically kept their flocks outdoors during spring and summer; in cold December, sheep were generally kept in shelters.^[5]

Research into the timing of Roman censuses also points away from winter. Conducting a census — which required long-distance travel — in the depths of winter would have been highly impractical.^[5]

A Range of Theories: Spring Through Autumn

Scholars have proposed various possibilities for the season of Jesus’s actual birth.

Some, drawing on clues in the Gospel of John, argue for spring (March–April). Others calculate from Jewish festival calendars and priestly rotation schedules to suggest autumn (September–October), around the time of Sukkot (the Feast of Tabernacles).^[5]

The year of Jesus’s birth — generally estimated between 6 and 4 BC — also remains debated. Ironically, the sixth-century monk Dionysius Exiguus, who devised the Anno Domini (AD) calendar system we still use, made a computational error, resulting in the curious situation where Jesus’s birth falls in BC (Before Christ).^[6]

How December 25th Came to Be Chosen

Theory 1: The Roman Sun Festival — Sol Invictus

The most well-known explanation for December 25th as Christmas is its association with Roman pagan festivals.^[7]

The Roman Emperor Aurelian proclaimed December 25th the “Dies Natalis Solis Invicti” (Birthday of the Unconquered Sun) in 274 AD.^[7] The festival celebrated the victory of the Sol Invictus — the Unconquered Sun — as the days grew longer after the winter solstice. Some historians argue that the Christian church chose December 25th to absorb this popular pagan celebration.

However, this theory faces a significant problem: there is no evidence in pre-fourth-century Christian literature of such a deliberate adoption.^[7] More recent scholars suggest that Christians had already independently calculated December 25th as Jesus’s birth date, and the comparison with the Roman solar festival came later.

Theory 2: The Roman Harvest Festival — Saturnalia

Another pagan-origin theory points to Saturnalia, the Roman festival honoring the agricultural god Saturn, held from December 17th to 23rd.^[8] Its features — gift-giving, feasting, and role reversal (masters serving slaves) — are said to have influenced later Christmas traditions.

However, Saturnalia did not fall on December 25th, and direct evidence that the church deliberately absorbed it is lacking.^[8]

Theory 3: The Annunciation Hypothesis

The theory currently attracting the most scholarly attention is the Annunciation Hypothesis.^[9] Rather than deriving from paganism, this is a theory rooted in internal Christian theological calculation.

Early Christian theologians believed that a person of complete life — Jesus — would have been conceived (entered the world) and died on the same calendar date.^[9] They calculated the date of Jesus’s crucifixion as March 25th in the Roman calendar. It followed that his conception also occurred on March 25th, and nine months later — December 25th — became his natural birth date.

This calculation appears in the writings of Augustine of Hippo.^[9] The Western Church designated March 25th as the Feast of the Annunciation, while the Eastern Church used April 6th as its equivalent — which explains the two date traditions: nine months after March 25th gives December 25th, and nine months after April 6th gives January 6th.

The Early Church’s Establishment of Christmas

Before the Fourth Century: Commemoration Without a Fixed Date

The early church did not officially commemorate Jesus’s birth from the outset.^[10] Through the third century, many Christian theologians actually regarded birthday celebrations as a pagan practice. For early Christians, the most important days were Good Friday and Easter, commemorating the crucifixion and resurrection.

One of the oldest surviving Christian documents, the Philocalian Calendar (354 AD), records December 25th as the birthday of Jesus.^[10] Historians believe the relevant section of this text was composed in Rome around 336 AD, making it the earliest known record of Christmas being officially celebrated on December 25th.

Emperor Constantine and the Recognition of Christianity

After the Edict of Milan in 313 AD granted official recognition to Christianity in the Roman Empire, the church was gradually able to develop public, organized worship.^[11] Emperor Constantine I’s support for Christianity had a major influence on the formalization of church events and liturgical seasons.

The fourth-century Roman Church adopted December 25th as an official feast day, and the observance gradually spread throughout Western Christendom. In 379 AD, Gregory of Nazianzus — a theologian from Cappadocia (in present-day Turkey) — preached a Christmas sermon in Constantinople, marking the growing acceptance of December 25th in the Eastern Church as well.^[10]

The Date Difference Between Eastern and Western Churches

Not all Christian churches celebrate Christmas on the same day — a difference that stems from divergent calendar systems and theological traditions.

Western churches (Catholic and Protestant) follow the Gregorian Calendar, introduced in 1582, and celebrate Christmas on December 25th.

Certain Eastern Orthodox churches — including those of Russia, Serbia, Georgia, and Jerusalem — adhere to the traditional Julian Calendar.^[12] In the Julian Calendar, December 25th corresponds to January 7th in the Gregorian Calendar (between 1901 and 2100, the two calendars differ by 13 days). As a result, Christmas is celebrated on January 7th in Russia and several other Eastern Orthodox countries.^[12]

The Armenian Church follows an even older tradition and commemorates the birth of Jesus on January 6th — a date derived from the Eastern Church’s annunciation calculation (conception on April 6th, birth nine months later on January 6th).^[5]

The Birth of Christmas Traditions

The Christmas Tree: A Tradition Born in Germany

The Christmas tree — one of the holiday’s most iconic symbols — is a fusion of pre-Christian evergreen veneration and sixteenth-century German Christian tradition.^[13]

In ancient Egypt and Rome, evergreen trees that remained green even in winter were regarded as symbols of life triumphing over death. Romans decorated their homes with evergreen branches during the Saturnalia festival.^[13]

The direct origins of the Christmas tree can be traced to sixteenth-century Germany. The earliest known written record, from Strasbourg in 1605, describes a fir tree being brought indoors and decorated with apples.^[13] There is a legend that Martin Luther was the first to add candles to a Christmas tree, but this lacks firm historical evidence.

The global spread of the Christmas tree owes much to Queen Victoria. In 1846, the Illustrated London News published an engraving of Queen Victoria and her German-born husband, Prince Albert, gathered around a Christmas tree.^[13] As the British and American public embraced the royal family’s tradition, the custom of the Christmas tree spread rapidly worldwide.

Santa Claus: From Saint to Secular Icon

Where did the image of the portly, white-bearded, red-suited Santa Claus come from? It begins with a real historical figure: Saint Nicholas, a fourth-century bishop from Asia Minor (present-day Turkey).^[14]

Nicholas, bishop of Myra, was renowned for his generosity to the poor. One famous story tells of him secretly delivering bags of gold at night to three sisters who lacked dowries.^[14] This tradition of giving passed down through the generations, eventually giving rise to the custom of leaving gifts for children on December 6th, the feast day of Saint Nicholas.

In the Netherlands, Saint Nicholas was known as Sinterklaas. When Dutch settlers emigrated to America in the seventeenth and eighteenth centuries, the name became Santa Claus.^[14]

The modern image of Santa Claus was completed in two stages. In 1822, Clement Clarke Moore’s poem “A Visit from St. Nicholas” introduced the image of a jolly Santa arriving by sleigh pulled by nine reindeer.^[14] Then in 1881, political cartoonist Thomas Nast published an illustration in Harper’s Weekly that cemented the modern image of Santa in a red suit, with a white beard and a round figure.^[14]

Christmas Carols: Songs of the Season

Carols are another indispensable Christmas tradition with a long history.^[15]

The word “carol” derives from a medieval round dance that combined song and movement. Early Christmas carols were sung not in church Latin but in the vernacular languages of ordinary people, passing from generation to generation through oral tradition.^[15]

The beloved carols sung around the world today were mostly composed in the eighteenth and nineteenth centuries. “Silent Night” (Stille Nacht) was written in 1818 by Josef Mohr, a priest in Oberndorf, Austria, with music by Franz Xaver Gruber. The carol has since been translated into more than 300 languages and is sung worldwide.^[15]

The Latin text of “O Come, All Ye Faithful” (Adeste Fideles) took its present form in the eighteenth century, though the composer’s identity remains disputed.^[15]

During the nineteenth century, the tradition of wassailing — going door to door singing songs — became established as Christmas caroling. The word “wassail” derives from the Old Norse phrase “Ves heil,” meaning “Be in good health.”^[15]

Modern Christmas: Religion and Secularism Side by Side

The Reinvention of Christmas in the Nineteenth Century

Much of what we recognize as Christmas today was, in fact, largely reinvented in the nineteenth century. In medieval and early modern Europe, Christmas was a raucous public festival; the Puritans even banned Christmas celebrations in England for a period.^[16]

With the Victorian era, Christmas was reborn as a warm, family-centered celebration. Charles Dickens’s novella A Christmas Carol (1843) had an enormous influence in shaping the modern image of Christmas as a time of family togetherness, charity toward neighbors, and gifts for children.^[16]

Commercialization and the Emergence of a Global Holiday

In the twentieth century, Christmas became one of the world’s largest commercial seasons. Gift-giving culture and mass-consumption traditions that originated in the United States spread across the globe through media and popular culture.^[16]

In Korea, Christmas was introduced through American cultural influence after liberation in 1945 and was designated a public holiday in 1949. Today, Korean Christmas has grown into a nationwide celebration and a romantic holiday for couples — extending well beyond the country’s Christian population (approximately 28%).

Worldwide, Christmas has expanded in meaning beyond religious belief to become a winter festival, a season of giving, and a time for family. As of the 2020s, Christmas-related consumer spending in the United States alone exceeds 90 billion dollars annually.^[17]

Reaffirming the Religious Meaning

Amid the tide of secularization, the religious significance of Christmas remains profound. For approximately 2.4 billion Christians worldwide, Christmas is one of the most important seasons in the liturgical year — celebrating the Incarnation, the theological belief that God entered the world in human form.^[11]

The midnight Mass on Christmas Eve, the candlelight filling the church, the chorus of “O Come, All Ye Faithful” — these are expressions of faith that have endured for two thousand years. Behind the commercial image of Santa Claus, the spirit of Saint Nicholas — who gave away his entire fortune for the poor — lives on. And atop every glittering Christmas tree, the star still points to the one that shone over Bethlehem.

Conclusion: Two Thousand Years in a Single Line on a Calendar

In 354 AD, the scribe of the Philocalian Calendar wrote just one line beside December 25th. Behind that single line lay the early church theologians’ painstaking calculation to place Jesus’s conception and crucifixion on the same date, the coincidental overlap with the Roman solar festival, and the two divergent traditions of December 25th and January 7th that arose when East and West adopted different calendars.

No element of Christmas was placed on a single blueprint from the start. No one could have predicted that the bags of gold a fourth-century bishop of Myra secretly delivered at night would travel through the Dutch Sinterklaas and arrive as New York’s Santa Claus. No one could have foreseen that the fir tree hung with apples in Strasbourg in 1605 would pass through Queen Victoria’s drawing room and go on to illuminate public squares around the world.

What Christmas ultimately reveals is that a single theological event has been transformed in unpredictable ways as it passed through different eras and cultures. Whether December 25th is Jesus’s actual birthday remains unknown. Yet it is precisely that uncertainty that has enriched the history surrounding this date — theological debate, calendar reform, folk tradition, and commercial reinvention alike. Christmas is not a settled origin story; it is the living history of interpretation, endlessly layered upon itself.