Ephesians 6:13-14
So you must take God's armor, so that when the evil day comes you will be able to make a stand, and when it is all over to hold your ground.
1 Thessalonians 5:2
for you yourselves know perfectly well that the Day of the Lord is to come like a thief in the night.
2 Peter 3:10
The Day of the Lord will come like a thief; on it the heavens will pass away with a roar, the heavenly bodies will burn up and be destroyed, and the earth and all its works will melt away.
Revelation 6:17
for the great day of their anger has come, and who can escape?"
Revelation 16:14
They are demon spirits that perform wonders, and they go out to the kings all over the world to muster them for battle on the great Day of God Almighty.
Revelation 20:8-9
and will go out to lead astray the heathen in the four corners of the earth, Gog and Magog, and to muster them for battle, in numbers like the sand of the seashore.