Pentecost derives from the Greek term — Pentekoste — fiftieth day. The seven weeks, or fifty days counting inclusively, after the Hebrew Passover. The Christian churches have taken it over and regard it as commemorative of the descent of the Holy Ghost upon the apostles in tongues of fire, as recorded in the New Testament; and they have made it the seventh Sunday after Easter.
- The coming of the Holy Spirit on the disciples, empowering them to preach.
Great Commission
Jesus gives the Great Commission to His disciples to spread the Gospel.
commemorates the descent of the Holy Spirit upon the Apostles of Jesus while they were in Jerusalem celebrating the Feast of Weeks, as described in the Acts of the Apostles (Acts 2:1–31).[2] The Catholic Church believes the Holy Spirit descended upon Mary, the mother of Jesus, at the same time, as recorded in the Acts of the Apostles (Acts 1:14).
Since its date depends on the date of Easter, Pentecost is a "moveable feast".