Acts 2:20

The sun shall be turned into darkness, and the moon into blood, before that great and notable day of the Lord comes:
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Augustine of Hippo

AD 430
the Church, shall be darkened, because in those tremendous temptations and tribulations which shall be in the end of the world, many who had seemed as bright and as firm as the sun and the stars shall fall from the faith.

Basil the Great

AD 379
these are the signs of the end of the world.

Bede

AD 735
This is believed partly as something which had been done at the Lord's passion, and partly as something to be done in the future. sun: This is, as if the power of Christ were hidden, or His doctrine temporarily obscured, or covered by a veil, when the servants of Antichrist are brought to attack the servants of Christ. moon: The Church, more than is wont, will shed her blood for Christ

Hippolytus of Rome

AD 235
The sun shall be turned into darkness, and the moon into blood.

John Chrysostom

AD 407
and of the taking of Jerusalem. It is said, indeed, that many such phenomena actually did occur in the sky, as Josephus attests.

Oecumenius

AD 990
this clearly describes for us the miracles that took place at the cross- the earthquake and the turbulence of the earth (Matt. 27:52), the darkness of the sun (Lk. 23:44), and the changing of the full moon into blood.

Theophylact of Ochrid

AD 1107
the sun shall be darkened," instead of being blackened; not disappearing, but being overwhelmed by the light of Christ’s appearance, and so too will the stars and the moon. For what need is there for sensory light when the Sun of Righteousness has appeared and night is no more?

Knowing this first, that no prophecy of the scripture is of any private interpretation - 2 Peter 1:20

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