The first Sunday after Easter is celebrated by many faithful Catholics as the Feast of Divine Mercy. This feast was announced by Jesus in a special way to Blessed Faustina Kowalska of the Most Blessed Sacrament. Each year, many people observe this feast.
When Jesus revealed this Feast to Blessed Faustina, He said to her:Whoever approaches the Fountain of Life on this day will be granted complete forgiveness of sins and punishment (300).Blessed Faustina recorded Jesusí words to her in her Diary. (The numbers in parentheses are from the margins of her Diary, Divine Mercy in My Soul.)
This Feast emerged from the very depths of My mercy, and it is confirmed in the vast depths of My tender mercies (420).
It is My desire that it be solemnly celebrated on the first Sunday after Easter ... I desire that the Feast of Mercy be a refuge and 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 fountain of My mercy (699).
I want to grant a complete pardon to the souls that will go to Confession and receive Holy Communion on the Feast of My mercy (1109).
The Chaplet of Divine Mercy is a special prayer revealed by Our Lord Jesus Christ to Blessed Faustina.
Divine Mercy Sunday Information
Pope John Paul II homily on Divine Mercy Sunday