Since the days of Jeshua the son of Nun, &c.— It can hardly be thought that this festival had never been observed since Jeshua's time, because we read in the book of Ezra, that it was kept at their return from Babylon; but the meaning is, that the joy since that time had never been so great as it was upon this occasion; for which the Jews themselves assign this reason, that in the days of Jeshua they rejoiced, because they had gotten possession of the land of Canaan; and now they equally rejoiced, because they were restored and quietly settled in it, after they had been long cast out of it.
Related Commentaries of Nehemiah 8:17
Nehemiah 8:17
17 And all the congregation of them that were come again out of the captivity made booths, and sat under the booths: for since the days of Jeshua the son of Nun unto that day had not the children of Israel done so. And there was very great gladness.