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 feast, no Credo, preface of the BVM with Et te in veneratione
Mass of the feast, Gloria, no Credo, common preface
Matins: All proper, including the three lessons of the nocturn; Te Deum
Lauds: Antiphons proper, with psalms of Sunday (first schema), remainder proper
Hours: Antiphons and psalms of the feria, remainder proper
I Vespers: Of the following Sunday; antiphons and psalms of Saturday; remainder per annum as given in the psalter; proper Magnificat antiphon and oration
Compline: Of Saturday