Observed on the Second Sunday of Easter, Divine Mercy Sunday — which in 2025 falls on April 27 — was established in 2000 by St. John Paul II during his canonization of St. Maria Faustina Kowalska, a 20th-century Polish mystic. For the sake of His Sorrowful Passion, have mercy on us and on the whole world 3X JESUS, KING OF MERCY, WE TRUST IN YOU! 3X