# All the men of Israel

To the people whom Solomon called to Jerusalem and who are listed in chapter 8:1 or generally to those who traveled to Jerusalem for the feast, not necessarily to every male person who lived in Israel. 

# at the feast

This is a reference to the Feast of Sukkoth, also known as the Feast of Tabernacles or Feast of Shelters .

# in the month of Ethanim, which is the seventh month

"Ethanim" is the seventh month of the Hebrew calendar. It is during the last part of September and the first part of October on Western calendars.