Second Sunday of Easter said to be the same as Divine Mercy Sunday
The Second Sunday of Easter is the day that occurs seven days after the Christian celebration of Easter. Those churches which give special significance to this day recognize it by various names. In the Catholic Church, this day is generally known as Divine Mercy Sunday. Across Western Christianity more broadly, this day is also known as the Octave Day of Easter, White Sunday (Latin: Dominica in albis), Quasimodo (or Quasimodogeniti) Sunday, Bright Sunday, and Low Sunday. In Eastern Christianity, this day is known as Antipascha, New Sunday (or Renewal Sunday), and Thomas Sunday.Divine Mercy Sunday
On April 30, 2000, Pope John Paul II designated the Second Sunday of Easter as Divine Mercy Sunday, based on a petition by St. Faustina Kowalska (1905–1938), who said that Jesus had made this request of the Church in an apparition. In the Roman Missal, the official title of this day is "Second Sunday of Easter; or, Sunday of Divine Mercy" (Latin: Dominica II Paschæ seu de divina Misericordia).
Five years later, Pope John Paul II died the evening before Divine Mercy Sunday, on Saturday, April 2, 2005. His successor, Pope Benedict XVI, beatified him also on a Divine Mercy Sunday, on May 1, 2011.