Today is, of course, the Feast of S Philip Neri, and so of great consequence to clergy and laity throughout the world who love the old gentleman and have been influenced, as I have, by the marvellous charism of his Sons. They are so potent in spreading Catholicism within the Church!
But stay. What about the Octave of Pentecost? Should S Philip be made to tranfer from today to Monday ... even, perhaps, to fight out with S Augustine who gets Monday ...
There is a real problem here which has an easy solution, hinted at by Tradition.
Until Pius XII and his henchman Bugnini started galumphing heavily around all over the Roman Rite, the days in the Octaves of Easter and of Pentecost were not uniform in status throughout the week. As in the Book of Common Prayer, Monday and Tuesday had a very special status, and excluded any other feast or commemoration that tried to elbow its way in. But the same was not true of the Wednesdays, Thursdays, Fridays, Saturdays within those Octaves. As your St Lawrence Press Ordo makes clear, those days were susceptible to the intrusion of commemorations (not of Festivals).
I think both Tradition and Pastoral Utility could suggest a return to something a bit like the pre-Pius XII system.
So, where S Philip (or anybody else who is a Double of the First Class qua Patron) finds himself ... e.g. ... on the Saturday, he might be allowed to intrude, and be observed on his proper Day..
When a Curate in the 1960s, I seemed often to be troubled by the appearance of S George in the Octave of Easter. Ordinary Christians found it hard to understand why the Church seemed so anxious to prevent him from being observed on his proper day.
My Modest Proposition: Where a Patron, a First Class Festival, occurs on the Wednesday etc. of the Pentecost Octave, (s)he should be allowed in. We should not be entirely deaf to lay instincts.