The LMS ORDO, admirable guide for those who use the 1962 Missal or Breviary, envisages S Patrick having only a Commemoration at Lauds and Low Masses today (I am talking about England, Wales, and Scotland).
I wonder why this is. In the 1940s, the English, Welsh, and Scottish dioceses differed greatly, some hardly noticing S Patrick, while a dozen or so classed him as a Greater Double just like S Gregory on the 12th. In the changes which came in with the 1960s, one would expect the 'Grd' to convert into a '2 Class'. And I have a 1969 ORDO, from the very eve of the disappearance of the old Calendars, in which S Patrick is a '2 cl' in the whole of Great Britain (1cl in Ireland, Commemoration "outside the British Isles").
I wonder if those me in his rebus valde doctiores would care to comment. It is of course not a minor detail, of interest only to those who need to be told to get a life, since upon it rests the question of whether S Patrick is actually noticed liturgically today (except by a mere commemoration after the Lenten collect etc.).
(In the 1940s Calendars, there seems no rhyme or reason about which British dioceses noticed S Patrick: Liverpool, for example, failed to do so! Incidentally, "All dioceses in Scotland" used a rather attractive Mass Egredere [cf Genesis 12:1-2]. And, in the 1940s, the Gospel of the Lenten Feria did duty as the Last Gospel.)