Acts 2:20

[In that day] the sun will become dark and the moon will [appear] as blood. [This will all happen] before the great and wonderful day when the Lord comes. [Note: Some view these last two verses as a reference to events occurring at the end of time. See Matt. 24:29-30].

Revelation 16:14

For they are spirits of demons, which perform [supernatural] signs. These spirits go out to the kings of the whole world to assemble them for battle on the great day of Almighty God.

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