Solving this problem involves answering the question of whether the Lord’s Last Supper was a Passover Meal, or a meal celebrated a day earlier, which we cannot enter into here. Suffice it to say that the early Church followed John rather than the synoptics, and thus believed that Christ’s death would have taken place on 14 Nisan, according to the Jewish lunar calendar. (Modern scholars agree, by the way, that the death of Christ could have taken place only in a.d. 30 or 33, as those two are the only years of that time when the eve of Passover could have fallen on a Friday, the possibilities being either 7 April 30 or 3 April 33.)
However, as the early Church was forcibly separated from Judaism, it entered into a world with different calendars, and had to devise its own time to celebrate the Lord’s Passion, not least so as to be independent of the rabbinic calculations of the date of Passover. Also, since the Jewish calendar was a lunar calendar consisting of twelve months of thirty days each, every few years a thirteenth month had to be added by a decree of the Sanhedrin to keep the calendar in synchronization with the equinoxes and solstices, as well as to prevent the seasons from “straying” into inappropriate months.
Apart from the difficulty Christians would have had in following—or perhaps even being accurately informed about—the dating of Passover in any given year, to follow a lunar calendar of their own devising would have set them at odds with both Jews and pagans, and very likely embroiled them in endless disputes among themselves. (The second century saw severe disputes about whether Pascha had always to fall on a Sunday or on whatever weekday followed two days after 14 Artemision/Nisan, but to have followed a lunar calendar would have made such problems much worse.)
These difficulties played out in different ways among the Greek Christians in the eastern part of the empire and the Latin Christians in the western part of it. Greek Christians seem to have wanted to find a date equivalent to 14 Nisan in their own solar calendar, and since Nisan was the month in which the spring equinox occurred, they chose the 14th day of Artemision, the month in which the spring equinox invariably fell in their own calendar. Around a.d. 300, the Greek calendar was superseded by the Roman calendar, and since the dates of the beginnings and endings of the months in these two systems did not coincide, 14 Artemision became April 6th.
In contrast, second-century Latin Christians in Rome and North Africa appear to have desired to establish the historical date on which the Lord Jesus died. By the time of Tertullian they had concluded that he died on Friday, 25 March 29. (As an aside, I will note that this is impossible: 25 March 29 was not a Friday, and Passover Eve in a.d. 29 did not fall on a Friday and was not on March 25th, or in March at all.)
Integral Age
So in the East we have April 6th, in the West, March 25th. At this point, we have to introduce a belief that seems to have been widespread in Judaism at the time of Christ, but which, as it is nowhere taught in the Bible, has completely fallen from the awareness of Christians. The idea is that of the “integral age” of the great Jewish prophets: the idea that the prophets of Israel died on the same dates as their birth or conception.
This notion is a key factor in understanding how some early Christians came to believe that December 25th is the date of Christ’s birth. The early Christians applied this idea to Jesus, so that March 25th and April 6th were not only the supposed dates of Christ’s death, but of his conception or birth as well. There is some fleeting evidence that at least some first- and second-century Christians thought of March 25th or April 6th as the date of Christ’s birth, but rather quickly the assignment of March 25th as the date of Christ’s conception prevailed.
It is to this day, commemorated almost universally among Christians as the Feast of the Annunciation, when the Archangel Gabriel brought the good tidings of a savior to the Virgin Mary, upon whose acquiescence the Eternal Word of God (“Light of Light, True God of True God, begotten of the Father before all ages”) forthwith became incarnate in her womb. What is the length of pregnancy? Nine months. Add nine months to March 25th and you get December 25th; add it to April 6th and you get January 6th. December 25th is Christmas, and January 6th is Epiphany.
Christmas (December 25th) is a feast of Western Christian origin. In Constantinople it appears to have been introduced in 379 or 380. From a sermon of St. John Chrysostom, at the time a renowned ascetic and preacher in his native Antioch, it appears that the feast was first celebrated there on 25 December 386. From these centers it spread throughout the Christian East, being adopted in Alexandria around 432 and in Jerusalem a century or more later. The Armenians, alone among ancient Christian churches, have never adopted it, and to this day celebrate Christ’s birth, manifestation to the magi, and baptism on January 6th.
Western churches, in turn, gradually adopted the January 6th Epiphany feast from the East, Rome doing so sometime between 366 and 394. But in the West, the feast was generally presented as the commemoration of the visit of the magi to the infant Christ, and as such, it was an important feast, but not one of the most important ones—a striking contrast to its position in the East, where it remains the second most important festival of the church year, second only to Pascha (Easter).
In the East, Epiphany far outstrips Christmas. The reason is that the feast celebrates Christ’s baptism in the Jordan and the occasion on which the Voice of the Father and the Descent of the Spirit both manifested for the first time to mortal men the divinity of the Incarnate Christ and the Trinity of the Persons in the One Godhead.
A Christian Feast
Thus, December 25th as the date of the Christ’s birth appears to owe nothing whatsoever to pagan influences upon the practice of the Church during or after Constantine’s time. It is wholly unlikely to have been the actual date of Christ’s birth, but it arose entirely from the efforts of early Latin Christians to determine the historical date of Christ’s death.
And the pagan feast which the Emperor Aurelian instituted on that date in the year 274 was not only an effort to use the winter solstice to make a political statement, but also almost certainly an attempt to give a pagan significance to a date already of importance to Roman Christians. The Christians, in turn, could at a later date re-appropriate the pagan “Birth of the Unconquered Sun” to refer, on the occasion of the birth of Christ, to the rising of the “Sun of Salvation” or the “Sun of Justice.”
William J. Tighe, a Touchstone correspondent, is Associate Professor of History at Muhlenberg College. He refers interested readers to Thomas J. Talley’s The Origins of the Liturgical Year (The Liturgical Press). A draft of this article appeared on the listserve Virtuosity.
http://www.touchstonemag.com/docs/issues/16.10docs/16-10pg12.html