As if what Ahwatukee has said in the post above is not enough, I offer this.
I think you will agree that the Day of the Lord depicts his judgement on people, nations, etc. Just in case you have not figured this out,,, Here is a list of scriptures that tells just what "The Day of the Lord" has meant down through the centuries.
'The Day of the Lord'
ἦλθεν [ēlthen] meaning [has come] , aorist tense which normally denotes past time. The day has already come in the opening of the sixth seal. God’s wrath is being poured out prior to the seventh seal (which initiates the seven trumpet judgments).
“For the great day of His wrath has come” (Rev. Rev. 6:17+).
Now just in case you get the holy spirit in you and want to read upon God's Wrath and what it has meant throughout the ages, I have provided supporting documents below.
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The primary Old Testament passages from which the images in the sixth seal are drawn prove that the great day must be the Day of the Lord (Isa. Isa. 2:10-11, Isa. 2:19-21; Isa. 13:9-13; Isa. 34:4, Isa. 34:8; Eze. 32:7-8; Hos. Hos. 10:8; Joel Joel 2:11, Joel 2:30; Zep. Zep. 1:14; Mal. Mal. 4:5).
First, the expression the Day of the Lord refers to God’s special intervention into world events to judge His enemies, accomplish His purpose for history, and thereby demonstrate who He is—the sovereign God of the universe (Isa. Isa. 2:10-22; Eze. Eze. 13:5, Eze. 13:9, Eze. 13:14, Eze. 13:21, Eze. 13:23; Eze. Eze. 30:3, Eze. 30:8, Eze. 30:19, Eze. 30:25-26). Second, several Days of the Lord already have occurred in which God demonstrated His sovereign rule by raising up nations to execute His judgement on other nations. For example, He raised up Babylon to judge Egypt and its allies during the 500s B.C. (Jer. Jer. 46:2, Jer. 46:10; Eze. Eze. 30:3-6). However, the Bible also foretells a future Day of the Lord.
At the outset of the day of the Lord, human trials will be prolonged and comparable to a woman’s labor before giving birth to a child (Isa. Isa. 13:8; Isa. 26:17-19; Isa. 66:7-9; Jer. Jer. 30:6-8; Mic. Mic. 4:9, Mic. 4:10; cf. Mtt. Mat. 24:8; 1Th. 1Th. 5:3). This phase of growing human agony will be climaxed by the Messiah’s personal return to earth to terminate the period of turmoil through direct judgment.
his is that great day for which the angels who did not keep their proper domain are reserved for judgment—they will be used in judgment against men (Rev. Rev. 9:1+). if Your interested check out "The Day of the Lord, Jacob’s Trouble and the Great Tribulation".
The wrath is said to be of the Lamb (Rev. Rev. 6:16+). This is extremely significant because those who are covered by the blood of the Lamb prior to this day (1Pe. 1Pe. 1:17-19) are exempted from experiencing His wrath—they are His bride (Luke Luke 21:36; Rom. Rom. 5:9; 1Th. 1Th. 5:9; Rev. Rev. 3:10+).