What is "the Day of the Lord"?
"The Day of the Lord" is the OT prophets’ phrase for any decisive in-history act of God’s judgment — and ultimately the great final day when God will judge the world, rescue his people, and bring his kingdom in fullness.
In Joel, Amos, Zephaniah, and others, the Day is both near (a coming judgment on a nation) and far (the end of all things). The prophets see them through a foreshortened lens.
The NT uses the same phrase for the second coming and final judgment (1 Thessalonians 5:2; 2 Peter 3:10).
For the faithful, the Day is hope. For the unrepentant, it is warning. The Christian lives ready: "What sort of people ought you to be in lives of holiness and godliness?" (2 Peter 3:11).
Original BibleDawn answer · reviewed 2026-06. Drafted with AI assistance and reviewed for accuracy.