IV class
White
The First Thursday votive Mass may be said: “one Mass of our Lord Jesus Christ, eternal High Priest, on the first Thursday or the first Saturday of each month, in churches and oratories in which special devotions are held on that day for the sanctification of the clergy” (Rubricæ generales, 385a).
IV class Votive Masses are permitted, but IV class Requiem Masses are not (until January 13 inclusive).
First Thursday votive: (White) Mass of our Lord Jesus Christ, eternal High Priest, Gloria, no Credo, preface of the Epiphany
OR
Ferial day: (White) Mass as on 6 January; Gloria; no Credo; preface of Epiphany
Matins: Invitatorium and Hymn from the Time of Epiphany; psalms and antiphons of the feria; scripture lessons proper to January 7; Te Deum
Lauds: Psalms and antiphons of the feria; capitulum and following from Time of Epiphany
Prime: Psalms and antiphons of the feria; Verse Qui natus es
Hours: Psalms and antiphons of the feria; capitulum and following from Time of Epiphany
Vespers: Psalms and antiphons of the feria; capitulum and following from Time of Epiphany
Compline: Of the feria