What was "Pentecost" before "Pentecost"? Beginning in the spring, the seven Jewish feasts are Passover, the Feast of Unleavened Bread, the Feast of Firstfruits, the Feast of Weeks, the Feast of Trumpets, the Day of Atonement, and the Feast of Tabernacles. The Jewish feasts are closely related to Israel’s spring and fall harvests and agricultural seasons. The first three occur back to back, almost simultaneously. The Feast of Unleavened Bread starts the very day after Passover is celebrated. Then, on the second day of the Feast of Unleavened Bread, the Feast of Firstfruits begins. The Feast of Weeks (Pentecost) occurred 50 days after the Firstfruits festival and celebrated the end of the grain harvest (the Greek word Pentecost means “fiftieth”). The primary focus of the festival was gratitude to God for the harvest. It was also generally regarded as commemorative of the gift of the law on the fiftieth day after the departure from Egypt.