day of the lord

noun

1. Also called Day of Yahweh. (in Old Testament eschatology) a day of final judgment. Amos 5:18–21; Ezek. 30.
2. Also called Day of Christ, Day of Jesus Christ. the day of the Second Advent. II Peter 3:10; I Cor. 1:14; Phil. 1:10, 2:16.