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 (Acts of the Apostles, chapter 2), and it marks the beginning of the Christian church’s mission to the world. The Jewish feast of Pentecost (Shavuot) was primarily a thanksgiving for the firstfruits of the wheat harvest, but it was later associated with a remembrance of the Law given by