The "day of the Lord" (Isaiah 13:6-9) refers to the time in the future, at the end of the age, at the beginning of which God's wrath and destruction will be dispensed upon an unrepentant world. The immediate precursor to this will be a short period of what I refer to as "cosmic disturbances" when the sun, moon, and stars will be darkened. Jesus spoke of these signs (Matthew 24:29), as did John when describing the opening of the Sixth Seal of the heavenly scroll (Revelation 6:12,13).

In my time line of the final seven years (or the 70th Week), I believe that the Sixth Seal most likely will be opened after six years have transpired. Then the cosmic disturbances will take place, the Rapture will occur (removing believers to protect them from the subsequent wrath of God), and then the wrath of God will be poured out upon those who are left, during a period of time known as the "day of vengeance" (Isaiah 34:8, 61:2, 63:4), which I believe will transpire for one year--the final year of the seven years (see The Seventh Year).

In Isaiah 13:9-20 is a description of someone who usually is assumed to be the Antichrist. It may have a double meaning of the demonic being, Satan, who presumably will possess the Antichrist.