First, the Kalendas.
For years I’ve posted about this. It was/is a custom for centuries before Mass begins to sing the Kalendas, the solemn announcement of the birth of the Savior at Prime.
Since Prime isn’t being sung in many places, and since we need to have these good customs in far greater use, sing it before Midnight Mass in the Vetus Ordo. The Novus Ordo too. Why not?
In the proclamation, the birth of Christ follows a list of important events, set points in history, which therefore puts the birth of Christ into the context of the history of salvation, beginning with the Creation of the world and culminating in the Nativity.
In the ancient world there was no standard calendar. One way to pinpoint events was to say what else was going on at the time according to other reckonings of time. The overlap of the dates would then give you the desired result, like a chronological Venn Diagram. The overlapping of the dates of the events cited in the Proclamation results in an accurate dating of the Nativity, that is 3/2 BC. There is good scholarship that reinforces 3/2 BC and cleans up a dating error for the year of Herod’s death.
The older Roman Martyrology has the notation for the Modus Ordinarius. It is rather like the “prophecy tone” and you raise the pitch at certain places.

There is a fancier rendering which is provided by Cappella Gregoriana Sanctæ Cæciliæ olim Xicatunensis. HERE
Here’s what the Kalendas sounds like more or less, if you can stand my singing.
The eighth Kalends of January. The 24th Moon. In the 5199th year from the creation of the world, when in the beginning God created the heavens and the earth; In the 2957th year from the flood; In the 2015th year from the birth of Abraham; In the 1510th year from the exodus of the people of Israel out of Egypt under Moses; In the 1032nd year from the anointing of David as King; In the 65th week according to the prophecy of Daniel; In the 194th Olympiad; In the 752nd year from the foundation of the city of Rome; In the 42nd year of the reign of the Emperor Octavian Augustus; In the 6th age of the world; While the whole earth was at peace, Jesus Christ, Eternal God and Son of the Eternal Father, desiring to hallow the world by His most merciful coming, having been conceived of the Holy Ghost, and once nine months passed after His conception, was born of the Virgin Mary at Bethlehem of Judah, made Man. The Birth of our Lord Jesus Christ according to the flesh.
Keep in mind there is also on Epiphany the singing of the announcement of the moveable feasts for 2023, the Noveritis, “Let y’all know”, which does change quite a bit from year to year for obvious reasons.
And now the other part.
From a priest reader…
QUAERITUR:
Dear Fr. Z,
Happy Ember Day. I suppose you are about to post the Kalendas for Christmas. I have a related question that perhaps you would like to address.
Do you know how the date for the creation of the world was derived? It is quite a bit shorter than the patriarchal timeline of the Biblical genealogy based on the Masoretic/Vulgate. And far shorter than the SP/LXX/Byzantine.
I am interested for a number of reasons. The Jews seem to have had prophecies, such as in the Talmud, that the Messiah would come after 4000 years. And also that the world would end after 6000, with prophecies of the Messiah as well. Some early Christians accepted this.
I have been very much enjoying reading the complete Ignatius Study Bible. But their notes for Genesis dismiss all the lifespans of the patriarchs. I don’t see why. Fr. Ripperger has aligned himself in the past with the Kolbe Center, which teaches young earth creationism. He seems to think it is possible anyway.
I just don’t understand how the Kalendas date could be about 600 years off. Why wouldn’t they just add up the dates from the Vulgate?
I question the motivation of the following organization, but I found this essay quite fascinating:
https://armstronginstitute.org/853-the-chronological-debate-from-adam-to-abraham-in-defense-of-the-masoretic-textIn Domino,… Fr. NA
So…
I just don’t understand how the Kalendas date could be about 600 years off. Why wouldn’t they just add up the dates from the Vulgate?
Okay. I’m going to hand this off to the readership. I suspect there is a Smarticus Pantsicus out there who will know something about this.

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