It 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".
According to legend, King Arthur always gathered all his knights at the round table for a feast and a quest on Pentecost:
“So ever the king had a custom that at the feast of Pentecost in especial, afore other feasts in the year, he would not go that day to meat until he had heard or seen of a great marvel.
