2
All of the men of Israel came together to where King Solomon was. It was at the time of the Feast of Booths. The feast was held in the month of Ethanim. That's the seventh month.
2
And all Israel came together [to king Solomon] in the month [of] Ethanim, that is September, in the solemn day; which is the seventh month. (And all Israel came together to King Solomon on the feast day in the month of Ethanim, that is September, which is the seventh month.)