The Easter Season always begins on Easter Sunday sometime between March 22 and April 25. This year Easter Sunday was April 4. It always ends on Pentecost Sunday, which this year is May 23. Traditionally the Sunday of the closing of the Octave of Easter has always been known as Low Sunday. At the canonization of St. Maria Faustina Kowalska on April 30th, 2000, however, Pope (now Saint) John Paul II officially designated it as Divine Mercy Sunday.