1Gather yourselves together, yes, gather together, you nation that has no shame, 2before the appointed time when the day passes as the chaff, before the fierce anger of Yahweh comes on you, before the day of Yahweh’s anger comes on you. 3Seek Yahweh, all you humble of the land, who have kept his ordinances. Seek righteousness. Seek humility. It may be that you will be hidden in the day of Yahweh’s anger. 4For Gaza will be forsaken, and Ashkelon a desolation. They will drive out Ashdod at noonday, and Ekron will be rooted up. 5Woe to the inhabitants of the sea coast, the nation of the Cherethites! Yahweh’s word is against you, Canaan, the land of the Philistines. I will destroy you until there is no inhabitant. 6The sea coast will be pastures, with cottages for shepherds and folds for flocks. 7The coast will be for the remnant of the house of Judah. They will find pasture. In the houses of Ashkelon, they will lie down in the evening, for Yahweh, their God, will visit them and restore them. 8I have heard the reproach of Moab and the insults of the children of Ammon, with which they have reproached my people and magnified themselves against their border. 9Therefore, as I live, says Yahweh of Armies, the God of Israel, surely Moab will be as Sodom, and the children of Ammon as Gomorrah, a possession of nettles and salt pits, and a perpetual desolation. The remnant of my people will plunder them, and the survivors of my nation will inherit them. 10This they will have for their pride, because they have reproached and magnified themselves against the people of Yahweh of Armies. 11Yahweh will be awesome to them, for he will famish all the gods of the land. Men will worship him, everyone from his place, even all the shores of the nations.
12You Cushites also, you will be killed by my sword.
13He will stretch out his hand against the north, destroy Assyria, and will make Nineveh a desolation, as dry as the wilderness. 14Herds will lie down in the middle of her, all kinds of animals. Both the pelican and the porcupine will lodge in its capitals. Their calls will echo through the windows. Desolation will be in the thresholds, for he has laid bare the cedar beams. 15This is the joyous city that lived carelessly, that said in her heart, “I am, and there is no one besides me.” How she has become a desolation, a place for animals to lie down in! Everyone who passes by her will hiss and shake their fists.
To the minds of the Hebrew, the day of the Lord was the future day when God would intervene in human history to vindicate Himself and the people of Israel. This concept seems to have appeared during the Conquest when God judged the Canaanites on behalf of His people Israel.
When Amos incorporated the concept of the day of the Lord in his preaching, however, his view was shocking to his people because Amos' understanding of this day was in total contrast to the popular notion of the 8th century B.C. Amos proclaimed that Israel would lament rather than rejoice on that day (Amos 5:16-17) for God was to judge Israel (5:18-20) and the world. On that day, God was going to reject Israel's meaningless religious rituals (5:21-27) and it was to be a day of darkness and woe (6:1-6). The moral corruption of Israel would ultimately usher in Israel's destruction on the day.
Expressing the concept in variant forms such as "by that day" and "on that day," the prophets frequently used this concept in their proclamation of judgment and hope. Zephaniah used it seven times, Isaiah six times, and Joel five times. These are the characteristics of the day of the Lord: 1) It will be a day of judgment (Joel 3:19-21; Amos 5:18) on the enemies of God including Israel and a day of vindication for the faithful; 2) The day of the Lord will be experienced everywhere (Isa 2:12; Zeph 1, 2; Amos 5:18-20); 3) The day of the Lord is near--not far out in the future (Isa 13:6); 4) There will be transformation in nature (Joel 3:18; Amos 9:13), in human relationships (Mic 4:3), and in the relationship between human beings and animals (Isa 11:6-8) which will result in the emergence of a better world; 5) On that day, Jerusalem will be exalted (Zech 14:16); 6) It will be accompanied by cosmic phenomena (Joel 2:28-32; Isa 13:10; 34:4; Ezek 32:7-8); 7) There will be a Davidic ruler (Isa 11:10); 8) There will be a re-gathering of God’s people (Isa 11:11). The New Testament equivalent for this is the second coming of Jesus Christ (2 Thess 2:1) and the day of the Lord Paul mentions in 2:2.