"S. Chrysostom seems to say, that this festival was received at the same time by the neighbouring provinces to Antioch; but this must not be extended as far as to Egypt, as we learn from a passage in Cassian. This author seems to speak only of the time when he was in Scetæ (about 399), but also of that when he wrote his tenth conference (about the year 420 or 425). But it appears that, in the year 432, Egypt had likewise embraced the practice of Rome: for Paul of Emesa, in the discourse which he made then at Alexandria upon the 29th of Coiac, which is the 25th of December, says it was the day on which Jesus Christ was born. S. Isidore of Pelusium, in Egypt, mentions the Theophany and the Nativity of our Saviour, according to the flesh, as two different festivals. We were surprised to read in an oration of Basil of Seleucia, upon S. Stephen, that Juvenal of Jerusalem, who might be made bishop about the year 420, was the first who celebrated there our Saviour's Nativity."
The Armenian Church still keeps up the eastern 6th of January as Christmas day--and, as the old style of the calendar is retained, it follows that they celebrate the Nativity twenty-four days after we do: and modern writers make the matter more mixed--for Wiesseler thinks that the date of the Nativity was 10th January, whilst Mr. Greswell says it occurred on the 9th April B.C. 4.
It is not everybody that knows that our system of chronology is four years wrong--_i.e._ that Jesus Christ must have been born four years before _Anno Domini_, the year of our Lord. It happened in this way. Dionysius Exiguus, in 533, first introduced the system of writing the words _Anno Domini_, to point out the number of years which had elapsed since the Incarnation of our Lord; in other words he introduced our present chronology. He said the year 1 was the same as the year A.U.C. (from the building of Rome) 754; and this statement he based on the fact that our Saviour was born in the twenty-eighth year of the reign of Augustus; and he reckoned from A.U.C. 727, when the emperor first took the name of Augustus. The early Christians, however, dated from the battle of Actium, which was A.U.C. 723, thus making the Nativity 750. Now we believe that that event took place during Herod's reign, and we know that Herod died between the 13th March and 29th March, on which day Passover commenced, in A.U.C. 750, so that it stands to reason that our chronology is wrong.