Bede

He read from the book of the law of God, etc. As far as the meaning of the text goes, the Feast of Tabernacles was typically celebrated for seven days, that is, from the fifteenth day of the seventh month of the moon, up to the twenty-first. Then on the eighth day, that is, the twenty-second of the month, a gathering of the people took place once more, marked by a greater festivity. …

Commentary on Ezra and Nehemiah ↗