ON THE FIRST FRIDAY of the month, provided no feast, ferial or octave takes precedence,
it is permitted to say one solemn votive Mass of the Sacred Heart, using the Mass of the Feast of the Sacred Heart . . . and
commemorating only a double of second class or greater ferial. Common imperata (prayers that an Ordinary may add to
the Mass in his diocese) and prayers after Mass are omitted. The Profession of Faith is used in a sung Mass and omitted in
a low Mass. The use of this solemn votive Mass requires that there be some devotion to the Sacred Heart, to be specified by
the local bishop, performed in the forenoon.
Appearing to St. Margaret Mary Alacoque, Our Lord asked that, in reparation for the ingratitude
of men, He be honored for His love under the emblem of His human heart. He made twelve specific promises of reward for such
honor. In particular, "To those who will go to Communion on the First Friday of the month, during nine consecutive months,
I promise the grace of final perseverance."
—From the Maryknoll Missal, 1957 edition