We will recognize it when we see the happenings come upon the world.
I believe Coronavirus is an example. March 11, 2020, when TV announced the various sports that were suspending their schedules, it seemed "unreal" to me: cancelling NCAA Basketball tournament March Madness; cancelling NBA season; cancelling PGA golf tournaments, and such.
I was also greatly affected when I saw TV pictures showing NYC Times Square without masses of people and with very few cars on streets.
And businesses closed around the world.
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I know the various plagues described in Revelation 8; 9; 16 ... and I felt I was actually seeing some of these plagues, especially in the great fires of California in 2022, which looked like the gates of hell being opened!
If you don't know the Bible then you might not recognize the plagues when they come upon this earth. Certainly the world and the apostate church will fail to see this connection and even many who say they believe in Jesus will be as dead people, not understanding what it is they are seeing.
While the world blamed China for Coronavirus, I thought it to be an end-time plague sent by God.
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When the sun goes dark and the moon fails to shine and the stars begin falling out of the sky then even the world will likely not recognize that God is doing something!
Matthew 24:29 Jesus says: Immediately after the tribulation of those days shall the sun be darkened, and the moon shall not give her light, and the stars shall fall from heaven, and the powers of the heavens shall be shaken:
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