Joel 2:31 Meaning and Explanation
“The sun shall be turned into darkness, and the moon into blood, before the great and the terrible day of the LORD come.”
King James Version (KJV)
Read this verse in context with translation switching:
Read Full Chapter →Joel's promise of the Spirit does not make the day of the LORD a small or private matter. The chapter places divine outpouring alongside signs in heaven and earth. Verse 31 helps us hold hope and holy fear together. God will act openly in history, and His final purpose includes both the exposure of evil and deliverance for those who call upon Him.
Joel foretells heavenly signs before the great and terrible day of the LORD. The darkened sun and blood-like moon mark a coming divine day of judgment and deliverance, calling hearers to take God's summons seriously.
The Context of Joel 2:31
Earlier in Joel 2, darkness in the heavens accompanies the approaching army and the near day of the LORD. After Israel's call to repent, the LORD promises pity, harvest, restoration, and His presence in the midst of Israel. Verses 28-29 then promise the outpouring of God's Spirit upon all flesh, including sons, daughters, servants, and handmaids. Verses 30-31 add wonders of blood, fire, smoke, and altered heavenly lights. Verse 32 immediately answers this fearful scene with the promise that whoever calls on the LORD's name shall be delivered, with deliverance in Zion and Jerusalem among those whom the LORD calls.
What Does Joel 2:31 Mean?
The verse describes the sun "turned into darkness" and the moon "into blood" before the day of the LORD arrives. Joel presents these as signs connected with a divine day so great that ordinary patterns of light are overturned. The phrase "moon into blood" is vivid prophetic imagery; the verse itself does not explain a physical mechanism, so caution is fitting about details it does not supply. What is clear is the scale and gravity of the event. The day is called both "great" and "terrible," language that answers the earlier question, "who can abide it?" God is not absent from a world that appears settled.
Within the chapter, verse 31 belongs to a movement from judgment through repentance and restoration to the pouring out of the Spirit. It does not erase the earlier devastation, nor does it leave God's people without hope. Verse 32 follows directly with deliverance for those who call on the name of the LORD. The signs therefore intensify Joel's call to seek God while He is addressing His people. They also show that God's salvation has a public horizon. The Spirit is poured broadly, wonders occur in heaven and earth, and the nations cannot finally treat the LORD's work as hidden or insignificant.
Peter quotes Joel 2:28-32 on the day of Pentecost, identifying the outpouring of the Spirit there with Joel's prophetic promise. Peter's use does not make Joel's solemn language empty. It places the gift of the Spirit within the larger day-of-the-LORD hope that Joel announces. Jesus likewise spoke of signs involving the sun, moon, and stars in connection with the coming of the Son of man. These canonical echoes teach watchfulness, prayer, and hope. The God who gives His Spirit also brings His purposes to their appointed completion, and He provides deliverance to those who call upon His name.
Bible Verses Related to Joel 2:31
“The earth shall quake before them; the heavens shall tremble: the sun and the moon shall be dark, and the stars shall withdraw their shining:”
- Joel 2:10
“But this is that which was spoken by the prophet Joel; And it shall come to pass in the last days, saith God, I will pour out of my Spirit upon all flesh: and your sons and your daughters shall prophesy, and your young men shall see visions, and your old men shall dream dreams: And on my servants and on my handmaidens I will pour out in those days of my Spirit; and they shall prophesy: And I will shew wonders in heaven above, and signs in the earth beneath; blood, and fire, and vapour of smoke: The sun shall be turned into darkness, and the moon into blood, before that great and notable day of the Lord come: And it shall come to pass, that whosoever shall call on the name of the Lord shall be saved.”
- Acts 2:16-21
“Immediately after the tribulation of those days shall the sun be darkened, and the moon shall not give her light, and the stars shall fall from heaven, and the powers of the heavens shall be shaken: And then shall appear the sign of the Son of man in heaven: and then shall all the tribes of the earth mourn, and they shall see the Son of man coming in the clouds of heaven with power and great glory. And he shall send his angels with a great sound of a trumpet, and they shall gather together his elect from the four winds, from one end of heaven to the other.”
- Matthew 24:29-31
“And I beheld when he had opened the sixth seal, and, lo, there was a great earthquake; and the sun became black as sackcloth of hair, and the moon became as blood; And the stars of heaven fell unto the earth, even as a fig tree casteth her untimely figs, when she is shaken of a mighty wind. And the heaven departed as a scroll when it is rolled together; and every mountain and island were moved out of their places. And the kings of the earth, and the great men, and the rich men, and the chief captains, and the mighty men, and every bondman, and every free man, hid themselves in the dens and in the rocks of the mountains; And said to the mountains and rocks, Fall on us, and hide us from the face of him that sitteth on the throne, and from the wrath of the Lamb: For the great day of his wrath is come; and who shall be able to stand?”
- Revelation 6:12-17
Where Joel 2:31 Echoes in Scripture
Acts 2:16-21 is the clearest canonical echo because Peter quotes Joel's promise of the Spirit, the wonders in heaven and earth, and the promise of deliverance for those who call on the Lord's name. He applies the prophecy to the Pentecost outpouring while retaining Joel's day-of-the-LORD horizon. The passage connects the Spirit's public gift with God's saving summons, rather than separating comfort from the seriousness of God's coming day.
How to Apply Joel 2:31 Today
This verse can free us from treating the present order as permanent or self-sustaining. We may live attentively before God, receiving ordinary daylight, work, and seasons as gifts rather than guarantees. Its immediate context directs us toward calling on the LORD, not toward anxious speculation about signs. In times of public upheaval or personal uncertainty, prayer, repentance, mercy, and steadfast faith remain fitting responses. The promised Spirit also means that God's people are not left to face the day of the LORD by mere human strength. We can ask for the Spirit's power to speak truthfully, serve faithfully, and endure with hope.
Reflection & Prayer
How does the promise of God's coming day change the way we receive the ordinary gifts and responsibilities before us today? We might pray: "LORD, keep us watchful and hopeful. Pour out Thy Spirit, teach us to call upon Thy name, and prepare us to live faithfully before Thee."