The Feast of Divine Mercy is·celebrated on the Octave of Easter - the Sunday after Easter Sunday.· Celebrating the Divine Mercy of Jesus Christ, as revealed by Christ Himself to Saint Maria Faustina Kowalska, this feast was extended to the entire Catholic Church by Pope John Paul II on April 30, 2000, the day that he canonized Saint Faustina.

A plenary indulgence (the forgiveness of all temporal punishment resulting from sins that have already been confessed) is granted on the Feast of Divine Mercy if to all the faithful who go to Confession, receive Holy Communion, pray for the intentions of the Holy Father, and "in any church or chapel, in a spirit that is completely detached from the affection for a sin, even a venial sin, take part in the prayers and devotions held in honour of Divine Mercy, or who, in the presence of the Blessed Sacrament exposed or reserved in the tabernacle, recite the Our Father and the Creed, adding a devout prayer to the merciful Lord Jesus (e.g. 'Merciful Jesus, I trust in you!')."