The First Friday votive Masses may be said: “two Masses of the Most Sacred Heart of Jesus, on the first Friday of each month, in churches and oratories in which special devotions are held on that day in honor of the Sacred Heart” (Rubricæ generales, 385b).
IV class Requiem Masses are not permitted during the IV class ferial days of Christmastide and Epiphanytide.
Sacred Heart votive: (White) Mass of the Feast of the Sacred Heart, Gloria, no Credo, commemoration of St. Telesphorus, proper preface.
Ferial day: (White) Mass as on 1 January; Gloria; no Credo; preface of the Nativity without proper Communicantes.
Nota bene: The principal parts of the office during these seasonal ferias are from January 1, but are all listed together for convenience in the Ordinarium, under Time of the Nativity.
Matins: Invitatorium and Hymn from the Time of the Nativity; psalms and antiphons of the feria; scripture lessons proper to January 4; Te Deum
Lauds: Psalms and antiphons of the feria; capitulum and following from Time of the Nativity; commemoration of St. Telesphorus
Prime: Verse Qui natus es
Hours: Psalms and antiphons of the feria; capitulum and following from Time of the Nativity
I Vespers: Of the Epiphany of the Lord; no commemoration
Compline: Of Sunday