Why December 25?

December 16, 2013 | 16 comments

It’s that time of year again when many Christians encounter claims that pagan deities predating Jesus Christ were born on December 25. In popular films, Internet videos, and other media you can find long lists of gods who were supposedly born on the same day.

This idea is not limited to unbelievers. I have heard many Christians claim that the date of Christmas was intended to provide an alternative to pagan celebrations. In some ways it has become a pious legend. On the other hand, some Fundamentalist denominations refuse to celebrate Christmas for this reason.

Of all the deities of whom people make this claim, only three can be found to come close: Saturn, Sol Invictus (Unconquered Sun), and Mithras.


Saturnalia was the feast dedicated to the Roman god Saturn. Established around 220 B.C., this feast was originally celebrated on December 17. Eventually the feast was extended to last an entire week, ending on December 23. The supposed connection to Christmas is based on the proximity of the two festivals to each other.

This can be found repeatedly on the Internet. In his article Saturnalia: The Reason We Celebrate Christmas in December, columnist Mark Whittington explains: 

It has been suggested that Christians in the 4th Century assigned December 25th as Christ's birthday (and hence Christmas) because pagans already observed this day as a holiday. In this way the problem of eliminating an already popular holiday would be sidestepped, thus making the Christianizing of the population easier.

If the suggestion were correct, one would expect to find at least a single reference by early Christians to support it. Instead we find scores of quotations from Church Fathers indicating a desire to distance themselves from pagan religions.

Sol Invictus and Mithras

The feast of Sol Invictus was the attempt by the Roman emperor Aurelian to reform the cult of Sol, the Roman sun god, and and reintroduce it to his people, inaugurating Sol's temple and holding games for the first time in A.D. 274. Not only was this festival not annual, it also cannot be historically documented as having been established on December 25 by Aurelian (cf. Steven HijMans, Sol Invictus, The Winter Solstice, and the Origins of Christmas, Mouseion, Series III, vol. 3, pp. 377-398).

According to inscriptions on candle votives and other ancient works of art, there is a link between Mithras and Sol Invictus. In some cases it appears the Mithraists believed that Mithras and Sol were two different manifestations of the same god. In others they appear to be two gods united as one. These connections are difficult to understand given our limited knowledge of the Mithraic belief system, but they are important because they help to explain why skeptics claim the birthday of Mithras was celebrated on December 25.

A manuscript known as the Chronography of 354 shows the birth of Sol Invictus being celebrated on December 25. Given the fact that the Mithraists equated their god with Sol in one way or another, it is understandable that they may have appropriated the date as their own. The problem for the skeptic is that no evidence exists to suggest that Aurelian was a Mithraist, or that he even had Mithraism in mind when he instituted the feast of Sol Invictus. The connection of Mithra to December 25 is only coincidental.

The deathblow to both the Mithras and Sol Invictus parallels is that the Chronography of 354 is the earliest mention of any pagan god being celebrated on December 25. The celebration of the birth of Christ by Christians is also mentioned on the calendar as having been celebrated on that day, which diminishes the likelihood that the pagan feast came first. At the very least, it negates the claim that it can be proved from the historical record that any December 25 pagan festival predates the Christian tradition.  

The Reason for Choosing December 25

Although the date of Christ’s birth is not given to us in Scripture, there is documented evidence that December 25 was already of some significance to Christians prior to A.D. 354. One example can be found in the writings of Hyppolytus of Rome, who explains in his Commentary on the book of Daniel (c. A.D. 204) that the Lord’s birth was believed to have occurred on that day:

For the first advent of our Lord in the flesh, when he was born in Bethlehem, was December 25th, Wednesday, while Augustus was in his forty-second year, but from Adam, five thousand and five hundred years. He suffered in the thirty-third year, March 25th, Friday, the eighteenth year of Tiberius Caesar, while Rufus and Roubellion were Consuls.

The reference to Adam can be understood in light of another of Hyppolytus’ writings, the Chronicon, where he explains that Jesus was born nine months after the anniversary of Creation. According to his calculations, the world was created on the vernal equinox, March 25, which would mean Jesus was born nine months later, on December 25.

Nineteenth-century liturgical scholar Louis Duchesne explains that “towards the end of the third century the custom of celebrating the birthday of Christ had spread throughout the whole Church, but that it was not observed everywhere on the same day” (Christian Worship, Its Origin and Evolution: a study of the Latin liturgy up to the time of Charlemagne, p. 260).

In the West, the birth of Christ was celebrated on December 25, and in the East on January 6.

Duchesne writes “one is inclined to believe that the Roman Church made choice of the 25th of December in order to enter into rivalry with Mithraism. This reason, however, leaves unexplained the choice of the 6th of January” (ibid., p. 261). His solution, therefore, was that the date of Christ’s birth was decided by using as a starting point the same day on which he was believed to have died. This would explain the discrepancies between the celebrations in the East and West.

Given the great aversion on the part of some Christians to anything pagan, the logical conclusion here is that one celebration has nothing to do with the other. In his book, Spirit of the Liturgy, Pope Benedict XVI explains:

The claim used to be made that December 25 developed in opposition to the Mithras myth, or as a Christian response to the cult of the unconquered sun promoted by Roman emperors in the third century in their efforts to establish a new imperial religion. However, these old theories can no longer be sustained. The decisive factor was the connection of creation and Cross, of creation and Christ’s conception (p. 105-107).

While these explanations of how December 25 came to be the date of Christmas are all plausible, we know one thing for sure: The evidence that this day held a special significance to Christians predates the proof of a supposed celebration of Sol Invictus or other pagan deities on that day.

That the Christians chose a date so close to the winter solstice is also not proof that this was done to mimic pagan festivals. The various pagan religions all had festivals spanning the calendar. Whatever month the early Christians might have otherwise chosen would still place Christmas near some pagan celebration, and oppositional theorists would still be making the same claims.

The solstice was important to everyone for agricultural reasons in the same way water is important to the survival of human beings, and so we see rituals involving water showing up in various religions. That doesn't prove that one borrowed the idea or theme from another.

Jon Sorensen earned his bachelor’s degree in 3D Animation and Visual Communications in 2004 from Platt College, Ontario. Before coming to Catholic Answers, he worked in the automotive industry producing television commercials and corporate video. He has also produced motion graphics for several feature-...

Comments by Catholic.com Members

#1  Laurence Goldkamp - El Cajon, California

Wow. Incredibly detailed. Is not Christmas pegan without baby Jesus? I assume that the date of the Son of God matters not to those who celebrate the Hippie Christmas, that is "Peace and Love, man!" "Jesus? You believe in that guy? Whatever, he was cool. Whatever floats your boat bro! Season's Greetings, Happy X-Mass!"

December 17, 2013 at 9:52 pm PST
#2  Michael Paul - Crook, Colorado

There doesn't have to be a pagan holiday that Christmas or other Christian feast days were intentionally replacing (though we know that Pope Gregory the Great told St. Augustine of Canterbury to co-opt pagan festivals and sacred space and make them Christian, so this practice did take place). For one thing, Romans had a holiday about every three days, so every saints day or event in the life of Christ would likely fall close to a Roman holiday and was not necessarily intentionally placed on that date to coopt a pagan festival. Secondly, St. John Chrysostom gave a homily on Christmas (in fact, five of his Christmas sermons survive) about 386 AD (Migne, Patriologus Graecae, vol. 49, cols. 351-362, esp. Section 5, col. 357) in which, by looking at the Gospel of Luke, he was able to argue that Christ was born in late December; he didn’t argue that it was merely an effort to replace a Roman or pagan festival. He argued that if Zachary was serving in the Temple "and all the multitude of the people was praying without" (Lk 1:10), it must be the greatest Jewish Feast of Tabernacles, which occurs in late September or early October. Zachary returned home, Elizabeth conceived soon thereafter, and the Angel Gabriel appeared to Mary while Elizabeth was “in her sixth month” (not after six months), which would be late March, and Jesus was born nine months after that, in late December. So Christmas doesn’t have to be a coopted pagan festival.

December 19, 2013 at 9:13 pm PST
#3  Jason Martinez - Omaha, Nebraska

It can be any day- Pagan holiday or not, as there is no day reserved for anyone or anything but God. Every day, all seven, are sacred and created Holy. He is the Creator! Pick a pagan day to revere the Son of Man- it was, and is always for Him. The Liturgical Year does not have dates, only days in line with the varying occurrence of Easter.

January 3, 2014 at 11:28 am PST
#4  J P Rodrigues - goa, Goa

Is there any thing wrong in the following straight forward answer based on Gospel of Luke?

"Jewish tradition use two kinds of calenders, one is
Civil calender which meant exclusively for kings, childbirth n contracts. The second was Sacred calender for religious festivals. Following are the months of Jewish Civil calender:
Tishri overlaps on Sept. to Oct. and is the first month.
Heshvan overlaps on Oct to Nov, Chislev overlaps on Nov to Dec. and so on; next is Tebeth, Shebat, Adar, Nisan,Iyar, Sivan, Tammuz, Ab and
Elul. Now Luke in verse 1:26 says that it was in the sixth month angel Gabriel was sent to Mary, meaning it was month of Adar which overlaps on Feb to March. If we take this as the time of Jesus' conception then we come close to Nov to Dec after nine months. So this is a strong biblical support for Christmas to be in December. Further Luke says at verse 1:36, that it is now sixth month for Elisabeth's pregnancy, meaning St. John the Baptist was born in the month of Sivan which is somewhere June and that is how we are celebrating his day on 24 th June."

March 12, 2014 at 1:00 am PST
#5  J P Rodrigues - goa, Goa

oops.. it was Sixth month of Elizabeth's pregnancy not of Jewish calender..That was a silly slip on my part.

March 12, 2014 at 3:08 am PST
#6  mar castro - Dublin, California

Dissecting the Bible, Jesus Christ, the apostles, and the Church established by Christ never celebrated Christmas (It is neither implied or expressed). God warned us not to add or delete anything on His words because it will become abomination to God.

Where do you draw the line as Christians?
White zone (Pure) - traditional (Jesus Christ teachings by the book)
Gray zone - modern and traditional Christianity (Add teachings not in the bible)
Black zone - modern Christians (faith alone concept)

December 11, 2014 at 10:29 am PST
#7  Jon Sorensen - El Cajon, California - Catholic Answers Blogger

Mar Castro, I recommend this link for an answer to your question about holidays and birthday celebrations:


December 11, 2014 at 10:39 am PST
#8  Jon Sorensen - El Cajon, California - Catholic Answers Blogger

Mar Castro, I recommend this link for an answer to your question about holidays and birthday celebrations:


December 11, 2014 at 10:39 am PST
#9  mar castro - Dublin, California

I was an altar boy for 5 years and went to Catholic High School (Binmaley Catholic High School in the Philippines). You can research the place. Now, I practice pure Christianity (traditional) and no additives.

?The word "Merry" is simple to define. It unquestionably means to be happy, joyful and light-hearted. The word "merry" fits into the ambience of laughter and frivolity. This word "merry" by itself is innocent and innocuous enough, but as we will now see, it becomes heinously blasphemous when used with the word "Christmas."

Here let it be noted that most people think that the word, "Christmas" means "the birth of Christ." By definition, it means "death of Christ", and I will prove it by using the World Book Encyclopedia, the Catholic Encyclopedia, and a book entitled, The Mass In Slow Motion. "

Christ - Jesus Christ
Mas - death

That's what I was taught. Catholic celebrate saints' birthday the day they died. In conclusion, Christmas has nothing to do with the birth of Jesus Christ.

December 11, 2014 at 11:10 am PST
#10  Jon Sorensen - El Cajon, California - Catholic Answers Blogger

Christmas has everything to do with the birth of Jesus Christ. And your etymology of the word "Christmas" is way off.

Dictionary.com has a much better description of the origin of the word:

Christmas comes from the Old English words Cristes moesse, 'the mass or festival of Christ'.

December 11, 2014 at 11:17 am PST
#11  Joseph Revesz - Dallas, Texas

Jesus's Holy Mother knew his date of birth. I'll bet his apostles knew it too. Was it kept secret, like the Da Vinci Code?

December 11, 2014 at 12:43 pm PST
#12  mar castro - Dublin, California

Dictionary.com is a modern translation of Christianity. They disguised the true meaning. Read the book written by Catholic Church.

If you are an honest, sincere and discerning Christian, please read on; if not, you might as well stop right here. The World Book Encyclopedia defines "Christmas" as follows: "The word Christmas comes from "Cristes Maesse", an early English phrase that means "Mass of Christ." (1) It is interesting to note that the word "Mass", as used by the Roman Catholics, has traditionally been rejected by the so-called Protestants, such as Lutherans, Baptists, Methodists, Presbyterians, Pentecostals and so on. The word "Mass" is strictly a Catholic word and thus, so is "Christ-Mass."

As previously stated, the word "Mass" in religious usage means a "death sacrifice." The impact of this fact is horrifying and shocking; for when the millions of people are saying, "Merry Christmas", they are literally saying "Merry death of Christ!" Furthermore, when the fat man in the red suit laughs boisterously and says, "Ho ho ho, Merry Christmas", he is mocking and laughing at the suffering and bleeding Saviour, who died for our sins. He does this while parents place their little children into his waiting arms to hear his false promises of gifts that he says he will give them. Consider what you are saying when you say "Merry Christmas.

December 11, 2014 at 6:06 pm PST
#13  mar castro - Dublin, California

My references:

Chist = Jesus Chirst
Mas - death sacrifice

01. World Book Encyclopedia, vol.3, p. 408, 1986 ed., World Book Inc., Chicago, IL

02. The Catholic Encyclopedia, R.C. Broderick, 1975 ed., Nihil Obstat, Richard J. Sklba, Censor Librorum. Imprimatur, Archbishop William E. Cousins, Milwaukee, WI.

03. The Mass In Slow Motion, Ronald Knox, 1948, Sheed & Ward, Inc., New York, NY. Nihil Obstat, E.C. Messenger, Censor Deputatus. Imprimatur, E. Morrogh Bernard, Vic. Gen.

December 12, 2014 at 6:58 pm PST
#14  Nicholas Young - Kingston, Ontario

Being an Orthodox Christian, of the Russian kind (although I am Canadian in fact), the connection between the Annunciation and the Nativity of Christ always seemed more important. The Annunciation was placed on 25 March, symbolically to coincide with the first day of Creation. Nine months later is 25 December.
Seeing that the Feast of the Annunciation had a fixed date before the Lord's Nativity, this fact helped determine 25 December as a feast date. That Saturnalia fell somewhere nearby is merely an historical coincidence. I share a birthday with Lawrence of Arabia; does that mean I should go make war in the desert?

December 21, 2014 at 2:37 pm PST
#15  John Paul Olano - Mambusao, Capiz

Mar Castro, in most dictionaries (and by dictionaries, I mean not the ones affiliated with any religion), the origin of the word "Mass", in the liturgical sense, is from the Latin word missa (dismissal), a word used in the remarks of the priest in Latin before ending the Mass: "Ite, missa est" ("Go; it is the dismissal").

In nowhere other than the web article entitled "The True Meaning Of Christ-Mass" (written by David J. Meyer, a Protestant pastor) have I read that the word Mass means "death sacrifice." The said article is obviously your sole reference for the things you're claiming.

Also, I am quite shocked that you didn't even have the courtesy to cite Mr. Meyer for using his words verbatim in your comment. I'm not even sure if you have really read all those books you posted as your sources, considering they were also the exact same books Mr. Meyer had acknowledged as his sources for the same article.

December 24, 2014 at 10:53 pm PST
#16  Charles Jackson - Arlington, Texas

Dec 25th is 9 months from March 25 and March 25th is 6 months from Oct 25th. October 25th in the Jewish year of 3760 was the Day of Atonement. As you know, the Day of Atonement is the one day of the year the High Priest goes into the Temple to light incense, in atonement for his sins and sins of the Jews.
The year 3760 was the year Zechariah was chosen by lot to go into the Holy of Holies. There he was visited by the angel Gabriel and told his barren wife would have a child.
That day correlates to Oct 25 th Gregorian calendar. Six months from that time Gabriel visited Mary and headed to the hill country to visit Elizabeth. ***** 9 months from 25 March and you have 25 Dec.
So in a sense you can say Christmas can be determined from Luke and Deuteronomy. 3760 + 2015=5775 which is the Jewish year we are in.

January 1, 2015 at 12:25 pm PST

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