In a series of revelations to St. Maria Faustina Kowalska in the 1930s, our Lord called for a special feast day to be celebrated on the Sunday after Easter. Today, we know that feast as Divine Mercy Sunday, named by Pope St. John Paul II at the canonization of St. Faustina on April 30, 2000.
The Lord expressed His will with regard to this feast in His very first revelation to St. Faustina. The most comprehensive revelation can be found in her Diary entry 699:
My daughter, tell the whole world about My inconceivable mercy. I desire that the Feast of Mercy be a refuge and a shelter for all souls, and especially for poor sinners. On that day the very depths of My tender mercy are open. I pour out a whole ocean of graces upon those souls who approach the fount of My mercy. The soul that will go to Confession and receive Holy Communion shall obtain complete forgiveness of sins and punishment. On that day are opened all the divine floodgates through which graces flow. Let no soul fear to draw near to Me, even though its sins be as scarlet. My mercy is so great that no mind, be it of man or of angel, will be able to fathom it throughout all eternity. Everything that exists has come from the very depths of My most tender mercy. Every soul in its relation to Me will contemplate My love and mercy throughout eternity. The Feast of Mercy emerged from My very depths of tenderness. It is My desire that it be solemnly celebrated on the first Sunday after Easter. Mankind will not have peace until it turns to the Fount of My mercy.
In all, St. Faustina recorded 14 revelations from Jesus concerning His desire for this feast.
Nevertheless, Divine Mercy Sunday is NOT a feast based solely on St. Faustina's revelations. Indeed, it is not primarily about St. Faustina — nor is it altogether a new feast. The Second Sunday of Easter was already a solemnity as the Octave Day of Easter[1]. The title "Divine Mercy Sunday" does, however, highlight the meaning of the day.
The Divine Mercy Message and Devotion
The message of The Divine Mercy is simple. It is that God loves us – all of us. And, He wants us to recognize that His mercy is greater than our sins, so that we will call upon Him with trust, receive His mercy, and let it flow through us to others. Thus, all will come to share His joy.

The Divine Mercy message is one we can call to mind simply by remembering ABC:
A - Ask for His Mercy. God wants us to approach Him in prayer constantly, repenting of our sins and asking Him to pour His mercy out upon us and upon the whole world.
B - Be merciful. God wants us to receive His mercy and let it flow through us to others. He wants us to extend love and forgiveness to others just as He does to us.
C - Completely trust in Jesus. God wants us to know that all the graces of His mercy can only be received by our trust. The more we open the door of our hearts and lives to Him with trust, the more we can receive.
This message and devotion to Jesus as The Divine Mercy is based on the writings of Saint Faustina Kowalska, an uneducated Polish nun who, in obedience to her spiritual director, wrote a diary of about 600 pages recording the revelations she received about God's mercy. Even before her death in 1938, the devotion to The Divine Mercy had begun to spread.
The message and devotional practices proposed in the Diary of Saint Faustina and set forth in this web site and other publications of the Marians of the Immaculate Conception are completely in accordance with the teachings of the Church and are firmly rooted in the Gospel message of our Merciful Savior. Properly understood and implemented, they will help us grow as genuine followers of Christ.
F.I.N.C.H.
Jesus told St. Faustina, “Mankind will not have peace until it turns with trust to My mercy” (Diary of Saint Maria Faustina Kowalska, 300; see also 699). The five elements of the devotion (represented by the acronym F.I.N.C.H., for Feast, Image, Novena, Chaplet, Hour) have attached to them some of the most powerful and extraordinary promises of any devotion.
Spend time to learn more about the mercy of God, learn to trust in Jesus, and live your life as merciful to others, as Christ is merciful to you.
For a full understanding of Divine Mercy, we recommend Divine Mercy Message and Devotion, by Fr. Seraphim Michalenko, MIC.
Hear a 30-minute crash course by Fr. Michael Gaitley, MIC.
Source: https://www.thedivinemercy.org/
Many parishes mark this special Sunday with additional afternoon prayers. Be sure to check your parish bulletin and join in prayer this week. Visit our DPB Parish Locations page to find a parish near you.
