What is the significance of Pentecost in the church?

Pentecost was the day that God poured out his Holy Spirit on the Believers(later referred to as Christians). In Book of Acts, Chapter 1, Jesus appeared to his disciples after his Resurrection and told his disciples to wait in Jerusalem until the Holy Spirit came. The events in Jesus life was fulfilled on the days of the Jewish religious calendar. He was crucified on Passover Day. He was resurrected on Day of First Fruits. Pentecost was a Jewish religious Day that was scheduled exactly 50 days after Passover---thus the meaning of the Word; Pentecost means "50". The Disciples were gathered together on Pentecost and praying when the Holy Spirit fell on them and they began talking in various tongues and languages. This was a tremendous event, because in the Old Testament part of The Bible only the High Priest or a few special leaders such as King David were said to be filled with the Holy Spirit. Of interest, in Book of Genesis, Chapter 11, man was trying to build a tower to the heavens. God saw this as man trying to reach god on their own means. God sent confusion to Man so they all began to speak in different languages and no one understood each other. This dispersed the people into different clans and nations. At Pentecost, God reversed this by giving all Christians the ablity to speak and understand each other.