Acts 2:20

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.

The sun shall be turned into darkness, and the moon into blood. This is believed to have been partly fulfilled during the Lord's Passion, and partly to occur before the great day, that is, the Day of Judgment. For at that time the sun was …

The sun will be turned into darkness. The name of darkness in Greek is read in the singular number, that is, σκότος, which the Latin translator necessarily rendered in the plural as tenebras because he could not express it in the singular. I thought it …

With these words the prophet clearly foretells in advance both the future judgment, and the destruction of Jerusalem, and the captivity of the Jews, and the events that were to take place at the cross of Christ, and finally, what happened to the Jews as …

The moon shall be turned into blood - A bloody colour: before the day of the Lord - Eminently the last day; though not excluding any other day or season, wherein the Lord shall manifest his glory, in taking vengeance of his adversaries.

It refers to the last days, the times of the gospel, which are called the last days because the dispensation of God's kingdom among men, which the gospel sets up, is the last dispensation of divine grace, and we are to look for no other than the continuation of this to the end of time.

It was a little day of judgment; it was a notable day: in Joel it is called a terrible day, for so it was to men on earth; but here epiphane (after the Septuagint), a glorious, illustrious day, for so it was to Christ in heaven; it was the epiphany, his appearing, so he himself spoke of it, Matt. xxiv.

The sun shall be turned into darkness,....

The sun shall be turned into darkness, and the moon into blood - These are figurative representations of eclipses, intended most probably to point out the fall of the civil and ecclesiastical state in Judea: see the notes on Mat 24:29. That the Sun is darkened when a total eclipse takes place, and that the Moon appears of a bloody hue in such circumstances, every person knows.

The sun shall be turned into darkness - See the notes on Mat 24:29. The same images used here with reference to the sun and moon are used also there: They occur not infrequently, Mar 13:24; 2Pe 3:7-10. The shining of the sun is an emblem of prosperity; the withdrawing, the eclipse, or the setting of the sun is an emblem of calamity, and is often thus need in the Scriptures, Isa 60:20; Jer 15:9; Eze 32:7; Amo 8:9; Rev 6:12; Rev 8:12; Rev 9:2; Rev 16:8. To say that the sun is darkened, or turned into darkness, is an image of calamity, and especially of the calamities of war, when the smoke of burning cities rises to heaven and obscures his light. This is not, therefore, to be taken literally, nor does it afford any indication of what will be at the end of the world in regard to the sun. The moon into blood - The word “blood” here means that obscure, sanguinary color which the moon has when the atmosphere is filled with smoke and vapor, and especially the lurid and alarming appearance which it assumes when smoke and flames are thrown up by earthquakes and fiery eruptions, Rev 6:12, “And I beheld when he had opened the sixth seal, and lo, there was a great earthquake, and the sun became black as sackcloth of hair, and the moon became as blood,” Rev 8:8. In this place it denotes great calamities. The figures used are indicative of wars, and conflagrations, and earthquakes. As these things are Matt. 24 applied to the destruction of Jerusalem; as they actually occurred previous to that event (see the notes on Matt. 24), it may be supposed that the prophecy in Joel had an immediate reference to that. The meaning of the quotation by Peter in this place therefore is, that what occurred on the day of Pentecost was the beginning of the serges of wonders that was to take place during the times of the Messiah. […]