Every child knows that Simeon addressed the new-born Messias as “a light to the revelation of the Gentiles,” and, since the Messias is also called by the Prophets the light in the darkness and the Sun of Justice, it is easy to see how such expressions passed into the Church’s liturgy for this festival.[335] It was natural for the Romans to set down the birth-day of this new Sun on the day marked of old time in their Calendar as a Natalis Solis, and observed as a festival by all the heathen inhabitants of Rome.[336] The choice of the day cannot be due to the desire to supplant the heathen festival, for it was not a festival of any special importance. But the similarity between the natural fact (the solstice) and the revolution in the spiritual sphere (Christ’s nativity), was sufficient to suggest the idea. It was not necessary to wait for the time of Constantine in order to hit upon this idea.
We must now return once more to the usages of the Church of Jerusalem and the festival observed there. The 6th January, indeed, was called in Jerusalem Epiphany, nevertheless the nativity of Christ formed an especially prominent feature of the commemoration.
A detailed description of the function is given in Silvia’s diary. Unfortunately the beginning is missing,[337] and the account opens with the return of the great procession which took place annually from Jerusalem to Bethlehem the evening before the feast. The next morning, the procession returned to Jerusalem and proceeded to the Church of the Anastasis, which was richly decorated. The monks remained all night in the church at Bethlehem, which, all through the octave, remained in festal array.[338] A procession to Bethlehem, on the Epiphany would have no meaning, if the baptism of Christ was the only event commemorated at that feast, for this, of course, took place in the Jordan. In Jerusalem, as in the other Eastern Churches, no special Christmas festival had been as yet instituted, still at the commencement of the fifth century there were some who regarded the Epiphany as the day of Christ’s nativity in the flesh, although, as St Jerome says,[339] the Son of God did not reveal Himself in flesh but rather concealed Himself. Indeed, if we are to believe Cosmas Indicopleustes, who lived in the middle of the sixth century, the nativity of Christ was commemorated at Jerusalem, and there only on the Epiphany—“a superstitious fancy,” as he calls it.[340]
On the other hand, it has been stated that Bishop Juvenal (425-458), who obtained for the Church of Jerusalem patriarchal rank, introduced the feast of Christ’s birth.[341]
Perhaps it was specially difficult to establish this festival in Jerusalem on the 25th December because another festival was already observed there on that day—the commemoration of David and the Apostle St James.[342] Their commemoration, along with that of St Joseph, is kept both by the Greek Church and the Church of Jerusalem on the Sunday before Christmas.[343]
A document already referred to, dating from the end of the ninth or beginning of the tenth century, affords an interesting proof of the manner in which these matters which we have placed before the reader were regarded at a later date. John, Bishop of Nicæa, who flourished about the year 900, endeavoured to induce the Armenians to adopt the 25th December as the day of Christ’s birth, and set down in an elaborate treatise the reasons he thought calculated to influence them. This composition is especially interesting because in it the introduction of Christmas is ascribed to a particular individual, none other than Pope Julius I. (337-352). Bishop Cyril of Jerusalem (348-386) is said to have corresponded with him on this question. Even if, from point of view of dates, this were not impossible, the letter of Cyril would in itself give rise to suspicion.[344] For Cyril would have been more likely to introduce or establish the feast on another day, while it is historically certain it was not yet observed in Jerusalem in 385.
In this pretended letter, Cyril alleges as a reason for transferring the feast to a different day from the Epiphany, that it is impossible for the inhabitants of Jerusalem to keep both feasts on the same day with befitting solemnity. Bethlehem lies three miles west, and the Jordan fifteen miles east of Jerusalem. It is stated in this letter that a procession went to both places on the same day, and so it was impossible for the clergy to accompany both. The often quoted diary of the Gallic Pilgrim[345] shows us that the procession to Bethlehem actually took place, but she is silent about a procession to the Jordan. This is first mentioned by Gregory of Tours in the sixth century.[346] It only was possible when the Nativity had been transferred to another day. The writer of the letter has antedated a later practice and certainly was not Bishop Cyril of Jerusalem.
The manner in which this letter brings forth evidence in favour of choosing the 25th December for the Nativity of Christ is also interesting. Titus, says the supposed Cyril in this letter to Pope Julius, had carried off all the books of the Jews to Rome after the destruction of Jerusalem. There they still remain, and Julius might make a search to see if the true birth-day of Christ cannot be discovered.[347] Julius then discovered from the writings of Josephus that Zachary had seen the vision of the angel in the Temple in the seventh month, on the Day of Atonement, which on that occasion had fallen on the 23rd September. On that day his son, St John the Baptist, was conceived, who was born on the 24th June following, but Christ, according to St Luke i. 36, was born six months later, on the 25th December.
As regards the liturgical celebration of the feast, the oldest sermons on the Nativitas Domini which have come down to us, are those of Zeno of Verona († 380).[348] They are purely moral exhortations, and throw no light upon the date of the feast. He has no sermon for the Epiphany, and it may be inferred he did not observe it or that it was identified with the Nativity.
The representation of the crib on a side-altar or some other conspicuous place in the church is a special feature of the Christmas festival at the present day. This remains in the church until Epiphany, or even to the 2nd February. The Christmas crib dates back to St Francis of Assisi, who, with the permission of the Pope, set up in 1223 for the first time a representation of the child Jesus in the manger.