Joel prophesies the day of Yahweh
After a devastating locust plague, Joel called Judah to return to God and promised that God would pour out his Spirit on all people.
“It will happen afterward, that I will pour out my Spirit on all flesh; and your sons and your daughters will prophesy. Your old men will dream dreams. Your young men will see visions.”
Joel 2:28 (World English Bible)
Joel saw the locusts as a warning of the coming day of Yahweh and urged the people to tear their hearts, not their garments. His promise of the Spirit was quoted by Peter on the day of Pentecost as fulfilled in the church (Acts 2).
Places
JerusalemMount ZionValley of JehoshaphatValley of Decision
Dating notes
The book gives no date. Ussher places Joel about 808 BC, early in Uzziah's reign; other conservative scholars date him to the reign of Joash (about 835 BC), and some later still.