The day of Pentecost coincides with the fiftieth day after the resurrection of Jesus. In Greek, Pentecost means fifty. According to the Old Testament, Pentecost was celebrated on the fiftieth day after the Jewish Passover Sunday, which for Christians is the fiftieth day after Easter. Jews celebrate the Feast of Weeks on Pentecost. They celebrate on this day for another reason: They believe that God gave them the law on that day. Therefore, it was very appropriate for God to give the gift of the Holy Spirit to the disciples for the first time on that day. It should be noted that Pentecost is also the birthday of the church.