Celebrated at the beginning of the wheat harvest (Exod. 34: 22), seven weeks after the presentation of the barley omer (= the first sheaf; Exod. 23: 16) during the feast of Unleavened Bread. It was also called Pentecost (Lev. 23: 16) and by NT times was kept as the anniversary of the giving of the Law on Mount Sinai, and by the Church as the day on which the Holy Spirit empowered the apostles (Acts 2: 1–4).