People sometimes talk about how January 1 has been"changed".
The facts are very simple.
Originally, in the Roman rite, this was the Octave of Christmas. An old Roman (and Byzantine) custom is to surround major festivals with associated celebrations. So the Divine Maternity of our Lady occupied the Octave Day. Look at the Collect and Postcommunion in the ancient rite.
Because the dies octava of the Nativity is the Day upon which the Incarnate Word was circumcised, that event, as narrated by S Luke, became the the Gospel for the Day, and, as is normal, this Gospel was explained in the readings of the Third Nocturn at Mattins.
Then it became fashionable for the Day to be renamed as "the Circumcision". But when this happened, the texts, for the most part, and in most places, were not changed. Simply the head-title of the Day.
In the twentieth century, the Day was given back its more ancient title. This did not result in any changes in the formulae of the Vetus Ordo, because the texts were already mainly about the Divine Maternity ... as they had been for very many centuries.
(In the late Medieval Church, exemplified by the Anglican tradition, there were a few places where changes were made, to turn this Day thematically into a meditation upon Circumcision.)
So there is no need for traddies to get excited by the thought that the twentieth century "abolished" the "Feast of the Circumcision". Nobody has had anything taken away from them!
But perhaps there might be floating in the air just a weeny hint of embarrassment about the genital particularity of the historical event of the Lord's Circumcision. How to explain it to the Children? Will it bring a blush to the cheeks of Maiden Aunts, assuming that there are any of those left?
I was on the point of calling such prudery "Victorian". Then I remembered that, in Anglicanism, the Day and its prayers and readings fixated on Circumcision right down to the second half of the twentieth century. And I wondered how fair it was to saddle the Victorians (or Maiden Aunts) with accusations of a prudery they showed no signs of having!