1 Kings 8:2

2 All the Israelites came together to King Solomon at the time of the festival in the month of Ethanim, the seventh month.

Read 1 Kings 8:2 Using Other Translations

And all the men of Israel assembled themselves unto king Solomon at the feast in the month Ethanim, which is the seventh month.
And all the men of Israel assembled to King Solomon at the feast in the month Ethanim, which is the seventh month.
So all the men of Israel assembled before King Solomon at the annual Festival of Shelters, which is held in early autumn in the month of Ethanim.