What the Bible Says about the “Day of The Lord”

Matthew 24:21-22 (KJV from www.biblegateway.com):
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21 For then shall be great tribulation, such as was not since the beginning of the world to this time, no, nor ever shall be.
22 And except those days should be shortened, there should no flesh be saved: but for the elect's sake those days shall be shortened.
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Jesus warns us in Matthew 24:21-22 that never in history of mankind has there been anything as deadly as what will come on the time of tribulation.
There are different positions on the interpretation of verse 22, some saying that this is a sign that the rapture will happen to those who wait in faith, to hide them from God’s wrath.
In Isaiah 13:11 we read (KJV from www.biblegateway.com):
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11 And I will punish the world for their evil, and the wicked for their iniquity; and I will cause the arrogancy of the proud to cease, and will lay low the haughtiness of the terrible.
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So let’s be prepared for His return.