By Doug Redford Today (Sunday, June 5) is Pentecost Sunday, celebrating the beginning of the church on the Day of Pentecost as recorded in Acts 2. In the Old Testament, Pentecost was one of the three most significant feasts observed annually by the Israelites (Passover and Tabernacles were the others). Pentecost as instituted in the Law of Moses was primarily a harvest festival, coming seven weeks, or 50 days, after the Passover celebration (thus the name Pentecost, derived from the Greek for fiftieth). It was also known as the day of firstfruits (Numbers 28:26) because the first loaves made from