The word comes from the Greek which means fifty. So, Pentecost was a celebration on the fiftieth day after Passover. It was a culmination of the feast of weeks (Ex. 34:22,23). Pentecost in the N.T. is the arrival of the Holy Spirit for the church (Acts 2). At Pentecost the disciples of Jesus were gathered and upon the filling of the Holy Spirit, they heard a great wind and spoke in tongues as tongues of fire that settled upon them. The significance of the fire can be found in recognizing it as a symbol of the dwelling of the Spirit of God (Ex. 19:18; 1 Pet. 4:14).