Pentecost is celebrated 40 days after Easterwhen Christians remember the descent of the third person of the Trinity - the Holy Spirit.After Jesus' Resurrection and ascension, his followers were in a room when a sound like rushing wind filled the room and flames appeared above their heads. God the Holy Spirit filled each one of them and they went out to start telling the worldabout Jesus Christ.
Experience Pentecost is a highly recommended resource that your local church can set up for classes.