External Solemnity of the Sacred Heart
The External Solemnity of the Feast of the Sacred Heart belongs by right to this day (RG 358a). As on the Feast, it is customary to have Benediction with the Act of Reparation to the Sacred Heart recited before the Blessed Sacrament exposed, the Act being that of Pope Pius XI (1928): O sweet Jesus, Whose overflowing charity for men is requited by so much forgetfulness, negligence, and contempt, etc. The Litany of the Sacred Heart is fitting recited or sung also. If the Blessed Sacrament is exposed in conjunction with the Mass, it is exposed after the completion of the Mass, not after Communion.
External Solemnity: Mass of the Sacred Heart; Gloria; no commemoration of the Sunday; Credo; proper preface.
Other Masses: Mass of the Sunday, Gloria, Credo, preface of the Holy Trinity
Office of Sunday per annum
Matins: Invitatorium and Hymn per annum as given in the psalter; three lessons proper; Te Deum
Lauds: Antiphons and psalms of Sunday (first schema); remainder per annum as given in the psalter; Benedictus antiphon and oration proper
Hours: Antiphons and psalms of Sunday (at Prime, Psalm 117 is used); remainder per annum as given in the psalter; oration proper
II Vespers: Antiphons and psalms of Sunday; remainder per annum as given in the psalter; Magnificat antiphon and oration proper
Compline: Of Sunday