The Scofield Bible Commentary, by Cyrus Ingerson Scofield, [1917], at sacred-texts.com
seventh month
That is, October; (Neh 8:2); (Neh 8:14).
for since the days of Jeshua
It is not meant that there had not been some formal observance of the feast of tabernacles (cf) (Ch2 8:13); (Eze 3:4), but that the people had not dwelt in booths since Joshua's days.