The interpretation timeline
Luke 21:25 Douay-Rheims

And there shall be signs in the sun, and in the moon, and in the stars; and upon the earth distress of nations, by reason of the confusion of the roaring of the sea and of the waves;

A.D. 339 – 1871 12 witnesses 20 excerpts

Patristic

before A.D. 750
339
A.D.
c. A.D. 260–339
“For at that time when the end of this perishing life shall be accomplished, and, as the Apostle says, The fashion of this world passeth away, (1 Cor. 7:13.) then shall succeed a new world, in which instead of sensible light, Christ Himself shall shine as a sunbeam, and as the King of the new world, and so mighty and glorious will be His light, that the sun which now dazzles so brightly, and the moon and all the stars, shall be hidden by the coming of a far greater light.”
Source
“What things shall befall the world after the darkening of the orbs of light, and whence shall arise the straitening of nations, He next explains as follows, And on the earth distress of nations, by reason of the confusion of the roaring of the sea. Wherein He seems to teach, that the beginning of the universal change will be owing to the failing of the watery substance. For this being first absorbed or congealed, so that no longer is heard the roaring of the sea, nor do the waves reach the shore because of the exceeding drought, the other parts of the world, ceasing to obtain the usual vapour which came forth from the watery matter, shall undergo a revolution. Accordingly since the appearance of Christ must put down the prodigies which resist God, namely, those of Antichrist, the beginnings of wrath shall take their rise from droughts, such as that neither storm nor roaring of the sea be any more heard. And this event shall be succeeded by the distress of the men who survive; as it follows, Men’s hearts being dried up for fear, and looking after those things which shall come upon the whole world. But the things that shall then come upon the world He proceeds to declare, adding, For the powers of heaven shall be shaken.”
Source
“When also the Son of God shall come in glory, and shall crush the proud empire of the son of sin, the angels of heaven attending Him, the doors of heaven which have been shut from the foundation of the world shall be opened, that the things that are on high may be witnessed.”
“Or the powers of heaven are those which preside over the sensible parts of the universe, which indeed shall then be shaken that they may attain to a better state. For they shall be discharged from the ministry with which they serve God toward the sensible bodies in their perishing condition.”
397
A.D.
Ambrose of Milan Patristic
A.D. 339–397
“All which signs are more clearly described in Matthew, Then shall the sun be darkened, and the moon shall not give her light, and the stars shall fall from heaven.”
“While many also fall away from religion, clear faith will be obscured by the cloud of unbelief, for to me that Sun of righteousness is either diminished or increased according to my faith; and as the moon in its monthly wanings, or when it is opposite the sun by the interposition of the earth, suffers eclipse, so also the holy Church when the sins of the flesh oppose the heavenly light, cannot borrow the brightness of divine light from Christ’s rays. For in persecutions, the love of this world generally shuts out the light of the divine Sun; the stars also fall, that is, men who shine in glory fall when the bitterness of persecution waxes sharp and prevails. And this must be until the multitude of the Church be gathered in, for thus are the good tried and the weak made manifest.”
Source
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“For as in this world the moon and the stars are soon dimmed by the rising of the sun, so at the glorious appearance of Christ shall the sun become dark, and the moon not shed her ray, and the stars shall fall from heaven, stripped of their former attire, that they may put on the robe of a better light.”
“(ad Olymp. Ep. 2.) Or the heavenly powers shall be shaken, although themselves know it not. For when they see the innumerable multitudes condemned, they shall not stand there without trembling.”
430
A.D.
Augustine of Hippo Patristic
A.D. 354–430
“(ad Hes. ut sup.) But that the Lord may not seem to have foretold as extraordinary those things concerning His second coming, which were wont to happen to this world even before His first coming, and that we may not be laughed at by those who have read more and greater events than these in the history of nations, I think what has been said may be better understood to apply to the Church. For the Church is the sun, the moon, and the stars, to whom it was said, Fair as the moon, elect as the sun. (Cant. 6:10.) And she will then not be seen for the unbounded rage of the persecutors.”
Source
“(ut sup.) But in the words, And upon the earth distress of nations, He would understand by nations, not those which shall be blessed in the seed of Abraham, but those which shall stand on the left hand.”
“(ut sup.) Or the powers of heaven shall be stirred, because when the ungodly persecute, some of the most stout-hearted believers shall be troubled.”
444
A.D.
A.D. 376–444
“Great must be understood in like manner. For His first appearance He made in our weakness and lowliness, the second He shall celebrate in all His own power.”
604
A.D.
Gregory the Great Patristic
c. A.D. 540–604
“(Hom. 1. in Ev.) For whom does He call the powers of heaven, but the angels, dominions, principalities, and powers? which at the coming of the strict Judge shall then appear visibly to our eyes, that they may strictly exact judgment of us, seeing that now our invisible Creator patiently bears with us.”
735
A.D.
Bede the Venerable Patristic
c. A.D. 672–735
“The events which were to follow the fulfilment of the times of the Gentiles He explains in regular order, saying, There shall be signs in the sun, and in the moon, and in the stars”
“Thus it is said in Job, the pillars of heaven tremble and are afraid at his reproof. (Job 26:11.) What then do the boards do, when the pillars tremble? what does the shrub of the desert suffer, when the cedar of Paradise is shaken?”

Scholastic

c. 1100 – 1500
1107
A.D.
c. 1055–1107
“Or else, When the higher world shall be changed, then also the lower elements shall suffer loss; whence it follows, And on the earth distress of nations, &c. As if He said, the sea shall roar terribly, and its shores shall be shaken with the tempest, so that of the people and nations of the earth there shall be distress, that is, a universal misery, so that they shall pine away from fear and expectation of the evils which are coming upon the world.”
Source

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“When they now shoot forth,.... Their buds, branches, and leaves; the Vulgate Latin adds, "of themselves": ye see and know of your own selves; without any hint, or direction from others, the case is so plain and obvious; the Syriac and Arabic versions read, "of them"; the trees, by their putting forth their buds and leaves; the Persic and Ethiopic versions leave out the clause "of yourselves"; and none of the Oriental versions lead the word see: the summer is now nigh at hand: see Mat 24:32.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“The sea and the waves roaring - Figuratively pointing out the immense Roman armies by which Judea was to be overrun and destroyed.”
1863
A.D.
1796–1863
“Isai. xiii. 10. Ezech. xxxii. 7. Joel iii. 15. Matt. xxiv. 29. Mark xiii. 24. G. P. " with perplexity, the sea and the waves roaring." Several manuscripts, as Schott remarks, join these words, which the semicolon separates. The Alexandrian, Vatican, and three other uncial manuscripts, and the versions generally, have the Vulgate reading. The sound, or roaring, in them, is a substantive, not a participle.”
Source
1871
A.D.
1871
“signs, &c.--Though the grandeur of this language carries the mind over the head of all periods but that of Christ's second coming, nearly every expression will be found used of the Lord's coming in terrible national judgments, as of Babylon, &c.; and from Luk 21:28, Luk 21:32, it seems undeniable that its immediate reference was to the destruction of Jerusalem, though its ultimate reference beyond doubt is to Christ's final coming.”
Source
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.