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).
Passiontide begins with I Vespers today. During Passiontide, crosses and statues are covered by violet veils, until Good Friday for crosses and the Paschal Vigil for the statues. (Coverings do not need to be affixed onto murals, nor onto bas-reliefs such as images engraved or carved under altars; the latter are generally obscured by the altar’s violet antipendium anyway.)
First Saturday votive: (White) Mass of August 22, Gloria, commemoration of the feria, no Credo, preface of the BVM with Et te in veneratione.
Mass of Saturday after 4th Sunday of Lent; no Gloria; no Credo; Preface for Lent; Prayer over the people
Matins: Invitatorium and Hymn in Tempore Quadragesimae as given in the psalter; antiphons and psalms of the feria; 3 lessons proper (homilia in Evangelium diei); no Te Deum
Lauds: Antiphons and psalms of the feria (2nd scheme); remainder in Tempore Quadragesimae as given in the psalter, except proper antiphon at Benedictus Qui sequitur and proper oration
Hours: Antiphons and psalms of the feria; remainder Tempore Quadragesimae as given in the psalter
I Vespers: Of Passion Sunday
Compline: Of the feria