Divine Mercy Sunday is a Christian feast celebrated on the Sunday after Easter. It was established by Pope John Paul II in the year 2000, recognizing the importance of God's mercy in the lives of believers. The day emphasizes the message of mercy revealed to Saint Faustina Kowalska, a Polish nun, who recorded her visions of Jesus and His compassion for humanity. On this day, many Christians participate in special church services, including the recitation of the Divine Mercy Chaplet. The celebration encourages acts of kindness, forgiveness, and reconciliation, reflecting the core message of mercy that is central to the Christian faith.