The “Day of the Lord” is portrayed in Scripture as a day of fear and trembling, justice and judgment. On that day, God will come as a Mighty Warrior and conquer the nations (Joel 2:1–11; Zeph. 1:14–16). The Day of the Lord is a recurring theme in Old Testament prophecy. And we know from the New Testament that this term can specifically refer to the Second Coming of Christ, when He will return as King (1 Thess. 5:2; Matt. 24:30–31; Phil. 2:9–11).