Joel 2:1-2
Joel commands the trumpet to sound in Zion because the day of the Lord is near and coming like no day before it — a day of darkness and gloom and thick cloud that must be feared.
1 Blow the trumpet in Zion, and sound an alarm in my holy mountain! Let all the inhabitants of the land tremble, for the day of Yahweh comes, for it is close at hand:
2 A day of darkness and gloominess, a day of clouds and thick darkness. As the dawn spreading on the mountains, a great and strong people; there has never been the like, neither will there be any more after them, even to the years of many generations.
Joel commands the trumpet to sound in Zion because the day of the LORD is near and coming like no day before it — a day of darkness and gloom and thick cloud that must be feared.
To sound the covenant alarm in Zion because the day of the LORD is near — a day of darkness, gloom, clouds, and thick darkness that demands trembling and urgent attention from all the inhabitants of the land.
This unit opens chapter 2 by escalating the day-of-the-LORD warning from 1:15 into a full alarm declaration from the holy mountain. The fourfold darkness language maximizes the terror of the approaching day, setting up the army-like advance of 2:3-11.
The Alarm of the Day of the LORD and the Promise of Restoration
When the day of the LORD exposes the terror of judgment, God summons his people to wholehearted return and promises restoration, Spirit-outpouring, and salvation for all who call on his name.