"Woe to you who desire the day of Yahweh! Why do you long for the day of Yahweh? It is darkness, And not light.
Regarding our own confidence in the doctrine of the Day of the Lord, or the Final Judgment of all men, it is anchored firmly in the teachings of the Son of God Himself who brought to mankind, through his own words, and those of his apostles, a very definite and extensive corpus of teaching related to this very thing, the words of the New Testament, therefore, providing an inexhaustible reservoir of truth regarding this fundamental doctrine of Christianity  (Hebrews 6:2).  All Old Testament references to the day of the Lord are illuminated by the New Testament.