Pentecost, also called Whitsunday, (Pentecost from Greek pentecostē, “50th day”), major festival in the Christian church, celebrated on the Sunday that falls on the 50th day of Easter. It commemorates the descent of the Holy Spirit on the Apostles and other disciples following the Crucifixion, Resurrection, and Ascension of Jesus Christ and it marks the beginning of the Christian church’s mission to the world.
