We see in Isaiah 24-27 what it called, “The Day of the Lord… the time of judgment on the whole earth and its destruction by God. This section is often called “Apocalyptic”, which is a genre in which something hidden is now revealed. Here, Isaiah holds up before both sinner & saint the clear teaching of “The Day of the Lord”…with every person being judged…especially verses 17-18 which show that no one will be able to escape His wrath. Elsewhere in the Old Testament we see this reference to the great & terrible Day of the Lord in Amos 5:18-19 and Joel 1:15-29. But even in the New Testament it is spoken of by Paul in Frist & Second Thessalonians as a warning of being ready & vigilant for Christ’s return.