Kyriale heading: “In Festis Solemnibus” (for Thursday, 27 May 2027). NOH (1942) ranks feasts as doubles and semidoubles; the 1962 calendar uses classes. The correspondence used here is approximate.
Vespers
Pss. 109, 110, 115, 127, 147: I f, II D, III a2, IV E, V a · Magnificat: V a · Salve Regina · Magnificat antiphon O sacrum convívium