Fr Hunwicke had a typical, thoughtfully researched post to mark the liturgical significance of yesterday on his blog. His own liturgical acumen looks at how describing it as the day of the Circumcision evolved into it being seen as the feast of the Circumcision. This he then sets within the way in which the Christmas Octave was observed. The result is a shsring of knowledge, a genuine insight into liturgical evolution from the early days of the Roman Church to the age of Vatican II. It is the best exposition of this development I have come across.
Fr Hunwicke’s article can be read at the-circumcision