God gives us the exact day of the Hebrew calendar to keep all of His festivals except the Feast of Pentecost. God tells us to count to determine the exact day of Pentecost. We will see the count begins on the day the wave sheaf offering is presented to God during the Days of Unleavened Bread. We are told to count seven sabbaths and then the day after the seventh sabbath would be the Feast of Pentecost.