Kyriale heading: “In Festis Semiduplicibus” (for Thursday, 30 September 2027). NOH (1942) ranks feasts as doubles and semidoubles; the 1962 calendar uses classes. The correspondence used here is approximate.
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Defaults for Thursday, 30 September 2027 (Tract (from Commune unius Martyris Pontificis — alia Missa) unticked).