"Woe to you who desire the day of Yahweh! Why do you long for the day of Yahweh? It is darkness, And not light.
This, and through  Amos 5:20, presents a remarkable view of the Day of the Lord, that is, the Day of Judgment, first as it would be in the case of Israel when God judged and destroyed her for her sins, and secondly, as it will be at the end of time for the great majority of the rebellious race of mankind.  This has been cited as the very earliest reference to the Judgment Day in scripture; but regardless of whether that is actually the case or not, the knowledge of it had existed for generations in Israel, as attested by the widespread, but untaught, desire for that day to come, mentioned in this very verse.