The First Saturday votive Mass may be said: “one Mass of the Immaculate Heart of the Blessed Virgin Mary, on the first Saturday of each month, in churches and oratories in which special devotions are held on that day in honor of the Immaculate Heart of Mary” (Rubricæ generales, 385c).
First Saturday votive: (White) Mass of August 22, Gloria, commemoration of the feria and of the saint, no Credo, preface of the BVM with Et te in veneratione
Mass of the feast, Gloria, commemoration of the feria, no Credo, common preface
Matins: Invitatorium Regem Confessorum Dominum; Hymn Iste Confessor; ferial psalms and antiphons; Lesson 3 of the feast; Te Deum
Lauds: Ferial psalms of the 1st scheme with antiphons; Hymn Iesu, Redemptor; proper oration; commemoration of the feria
Hours: Ferial psalms with antiphons per annum; proper oration
I Vespers: Of the coming Advent Sunday, proper antiphons, Saturday psalms, remainder proper
Compline: Of Saturday