In this episode, we delve into one of the most intriguing, yet potentially perplexing, themes in the Bible - the Day of the Lord. We and explore how this idea first crystallizes in the book of Joel. Likely the earliest of the written prophets, Joel speaks into a moment of national fragility near the end of Queen Athaliah’s reign (2 Kings 11), during those shadowy years between verses 3 and 4, when Judah’s king was hidden, the throne stood vacant, and idolatry and wickedness reigned over Southern Judah.
It is in this context that Joel introduces language that will ripple across the entire biblical story. While earlier narratives hint at the concept of the Day of the Lord, such as the spirit of the day in Genesis 3 or that day in Exodus 32, Joel is the first to use the explicit phrase "the Day of the Lord."
And Joel makes it unmistakably clear that this Day is not simplistic. It can be both judgment and deliverance, devastation and salvation. It is a day when God confronts His people, but also a day when God rescues those who return to Him. Joel even uses the phrase to refer to two different historical moments, showing us that the Day of the Lord is not a single date on the calendar but can be used to refer to multiple "comings" of the Lord in judgment or salvation.
We explore how the Day of the Lord carries both certainty and contingency. Sometimes the Day will come no matter what. Other times, its arrival - or its intensity - depends on the response of those who hear the warning. Repentance might avert it entirely. Or repentance might not stop the Day from coming, but the repentant faithful will escape its destruction. In this way, a “future Day of the Lord” can refer to:
a historical event that will occur,
a historical event that could occur but never materializes,
or the ultimate climactic Day at the end of the age.
One of the central functions of proclaiming the Day is this: to call God’s people back before the Day arrives. Prophets announce the Day not merely to predict but to transform. They want to summon listeners into the mercy of God while time remains.
From here, we trace the theme of the Day of the Lord into the New Testament, especially 2 Peter 3:10 13. Peter uses the exact language of “the Day of the Lord” but applies it to the final eschatological horizon when Jesus returns, and the world is renewed. Even at the very end of time, the function remains the same: announcing the future Day of the Lord is meant to awaken repentance, holiness, and hopeful perseverance.
Key Passages:
Joel 1:15-18; 2:1-2, 12-14
2 Peter 3:10-13
Possible conceptual allusions to a "Day of the Lord" before Joel: Genesis 3:8 - The Lord God walking in the cool/spirit of the day. Exodus 32:28 - "that day" the Lord brought a plague on the people.
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