THE DAY OF THE LORD
The Day of the Lord is not a day of twenty four hours, but it is a period of time mentioned in various prophecies both in the Old and in the New Testaments, where it has descriptive names as follows:
The great tribulation - Matthew 24:21, Revelation 7:14
The hour of trial - Revelation 3:10
Daniel's last week - Daniel 9:27
The year of recompense for the cause of Zion - Isaiah 34:8
The overflowing scourge - Isaiah 28:15,18
The Lord's unusual act - Isaiah 28:21
THE DAY OF
the Lord - Amos 5:18, Joel 2:1, Zephaniah 1:14, 1 Thessalonians 5:2
the Lord's vengeance - Isaiah 34:8, 61:2
the wrath, the wrath of the Lamb - Daniel 11:36, Zephaniah 1:15, Revelation 6:16-17, 1 Thessalonians 1:10, 5:9
trouble and distress - Deuteronomy 4:30, Daniel 12:1, Zephaniah 1:15, Obadiah 14
devastation and desolation - Zephaniah 1:15
darkness and gloominess - Zephaniah 1:15, Joel 2:2, Amos 5:18,20
clouds and thick darkness - Zephaniah 1:15, Joel 2:2
trumpet and alarm - Zephaniah 1:16
Jacob's trouble - Jeremiah 30:7, Daniel 12:1
calamity of Israel - Deuteronomy 32:35, Obadiah 13
indignation - Isaiah 26:20
For you yourselves know perfectly that the day of the Lord so comes as a thief in the night.
1 Thess 5:2 (NKJV)