The request for this devotion was revealed by Our Lady of the Rosary to Bl. Francisco, Bl. Jacinta and Lucia, to whom she appeared at Fátima, Portugal, in 1917. On June 13,1917, Our Lady clearly said to Lucia:
Jesus wishes to make use of you to make me known and loved. He wants to establish in the world devotion to my Immaculate Heart. 
Our Lady repeated this in the July 13th apparition when, after the vision of Hell that was granted to the three little shepherds, She said:
You have seen Hell, where the souls of poor sinners go. To save them, God wishes to establish in the world devotion to my Immaculate Heart. If what I say to you is done, many souls will be saved and there will be peace.
She wishes that, as we endure the inconveniences, suffering and heart aches of our daily life, we offer them up accompanying them by the following praying:
O my Jesus, I offer this for love of Thee, for the conversion of sinners, and in reparation for the sins committed against the Immaculate Heart of Mary.
Regarding the First Saturday devotions, which are efficacious in honoring and making reparation to the Immaculate Heart of Mary, She instructed us thus:
I promise to help at the hour of death, with the graces needed for salvation, whoever on the First Saturday of five consecutive months shall:
1. Confess and Receive Holy Communion.
2. Recite five decades of the Holy Rosary.
3. Keep me company for fifteen minutes while meditating on the fifteen mysteries of the Rosary, with the intention of making reparation to me.
She clarified to Sr. Lucia at a later time that the Sacrament of Reconciliation could take place up to eight days before the Saturday in question as long as the soul remained in the Sate of Grace for the Communion with God.
word of Our Lady of the Rosary in English and Portuguese
(2) The Response to Marian Apparitions Has Obviously Not Been Appropriate but is not too late to start.
First Friday Devotion to the Sacred Heart of Jesus
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