Commemoration of the Baptism of the Lord
In Commemoratione Baptismatis Domini Nostri Jesu Christi
Proper
Ordinary
Missa IV — Cunctipotens Genitor
Kyriale heading: “In Festis Duplicibus” (for Wednesday, 13 January 2027). NOH (1942) ranks feasts as doubles and semidoubles; the 1962 calendar uses classes. The correspondence used here is approximate.