The interpretation timeline
Matthew 24:22 Douay-Rheims

And unless those days had been shortened, no flesh should be saved: but for the sake of the elect those days shall be shortened.

A.D. 367 – 1863 7 witnesses 8 excerpts

Patristic

before A.D. 750
367
A.D.
Hilary of Poitiers Patristic
c. A.D. 310–367
“Or; That we be not taken in the frost of sins, or in discontinuance of good works, because of the soreness of the affliction; notwithstanding that for the sake of God’s elect, those days shall be shortened, that the abridgment of the time may disarm the force of the calamities.”
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“I ask the Jews, whence came upon them so grievous wrath from heaven more woful than all that had come upon them before? Plainly it was because of the desperate crime1 and the denial of the Cross. But He shews that they deserved still heavier punishment than they received, when He adds, And except those days should be shortened, there should no flesh he saved; that is, If the siege by the Romans should be continued longer, all the Jews would perish; for by all flesh, He means all the Jewish nation, those within and those without; for the Romans were at war not only with those in Judæa, but with the whole race wherever dispersed.”
Source
“But that the Jews should not say that these evils came because of the preaching and the disciples of Christ, He shews them that had it not been for His disciples, they would have totally perished, but for the elect’s sake those days shall be shortened.”
430
A.D.
Augustine of Hippo Patristic
A.D. 354–430
“For we ought not to doubt that when Jerusalem was overthrown, there were among that people elect of God who had believed out of the circumcision, or would have believed, elect before the foundation of the world, for whose sake those days should be shortened, and their evils made endurable. Some there are who suppose that the days will be shortened by a more rapid motion of the sun, as the day was made longer on the prayer of Jesus Naue.”
Source

Scholastic

c. 1100 – 1500
1256
A.D.
Thomas Aquinas Catholic
1225–1274
“He has already set forth the destruction; in this part he sets forth that the consummation will come, and he sets forth certain preambles. And first he sets forth the prophecy; second, the admonition, at the words "then let those who are in Judea flee to the mountains"; third, the reason for the admonition, at the words "for then shall be great tribulation." Thus he said the consummation will come, "when therefore you shall see the abomination of desolation," etc. What is it that he calls the abomination? It can be said that the army of the Romans is called the abomination, and they are called abominations of desolation because they were the desolators of the land. Or by "abominations" idols are meant, and this can be said of a twofold idol. It is read that Pilate brought an eagle into the temple, which was the standard of the Romans, which the Jews called an abomination. Hence when you shall see the idol placed in the holy place, then you can recognize the fulfillment of the prophecy of Daniel concerning the destruction of Jerusalem. Or it can be said that Jerusalem was destroyed in two ways. First by Titus and Vespasian, and then the temple was burned, and then still some were left. Afterward still some rebelled, and then Hadrian, who succeeded Trajan, destroyed it utterly, and gave a law that no Jew should thereafter dwell there, and he called the city by his own name; likewise he placed an idol in the sacred place. Hence that idol, which Hadrian placed, can be called the abomination; hence "when you shall see this," etc. Concerning this casting-down enough is had in Lamentations 2. "Let him who reads understand." And why does he say this? Because in that prophecy of Daniel many things are said about the Passion of Christ. For these words are to be observed; hence there it is said: "Christ shall be slain, (...) and there shall be in the temple the abomination of desolation, and the desolation shall persist even to the consummation and the end." Hence let him who sees understand that such things have happened. "Then let those who are in Judea flee to the mountains." He sets forth a useful admonition. And first he sets it forth; second he excludes impediments to flight. For some impediments are avoidable, some unavoidable. He says, "then let those who are in Judea flee to the mountains." "Then," namely in the time of Vespasian. At that time a certain man called Agrippa ruled in the mountains, and he obeyed the Romans, nor did he rebel against them: hence while other peoples were at war, he and his people were at peace. Hence by the providence of God the faithful who were in Judea were admonished to withdraw and go to the kingdom of this Agrippa, and so they did: hence "then let those who are in Judea," namely the faithful, "flee to the mountains"; Zechariah 2:6: "flee from the land of the north," etc. Then he removes the impediments to flight. And because some impediments are avoidable, some not, therefore first he sets forth the avoidable dangers; second the unavoidable, at the words "woe to those who are with child," etc. Those which are avoidable are the affairs of earthly things: and of these some happen in the city, some outside; therefore he sets forth both. The second at the words "and let him who is in the field not turn back to take his cloak." He says therefore, "and let him who is on the housetop not come down to take anything from his house"; that is, whoever dwells in the city, even if in his house, let him not turn back to take anything, etc. Likewise, "and let him who is in the field not turn back," into the house, "to take his cloak," namely whatever things are necessary, because all that a man has he will give for his soul. And why does he say this? Because with the feast of the Passover impending, many gathered in Jerusalem: and Titus, knowing this, besieged the city, since they were thus gathered together. Hence he means to say: this evil will happen so quickly that no one will be able to take precaution for himself. Likewise he sets forth the unavoidable impediments. And because some were unavoidable by human power and simply so, while others, though unavoidable, were nevertheless avoidable by the power of God, therefore first he speaks of the first; second of the second, at the words "pray," etc. That which, when it exists, can in no way be avoided, is the burden of children. For although someone might be told: save your soul, he could say: how can I leave behind my child? Therefore he explains this: "woe to those who are with child and who are nursing," because such women could not flee, since it was not to be said to them that they should procure an abortion, nor to nursing women that they should kill their children; and thus is fulfilled what is said in Luke 23:29: "blessed are the breasts that have not given suck." Likewise there are other impediments where man cannot provide a remedy except through God. For some time is unsuitable either by nature or by law: by nature, as wintertime, because then a man is hindered from fleeing on account of the harshness of the weather. Likewise on account of the law, as if it should happen on the sabbath, because God commanded that they should not go beyond one mile. And because this is not in our power, but God's, therefore "pray that your flight be not in winter, or on the sabbath," because in such matters recourse must be had to God alone. Hence Hosea 6:1: "Come, and let us return to the Lord, for he has taken us, and he will save us." Pray that it be not in winter, because it hinders flight naturally on account of the danger of the road; nor on the sabbath, because it hinders according to the law of God. Also note that he says "sabbath," by which he indicates that on a feast day they were fittingly slain. Whence the necessity of fleeing? From the greatness of the tribulation. Hence first he sets forth the tribulation and the greatness of the tribulation; second he sets forth the cause, at the words "and unless those days had been shortened," etc. He says therefore, "for then shall be great tribulation, such as has not been from the beginning of the world." And this he who reads the history of Josephus can well weigh, that many died of famine. Likewise there were seditions in the city, so that they killed one another: hence although Titus, who was most gentle, wished to spare them, they themselves were unwilling. Likewise there were robbers among them who killed many. And a certain woman ate her own son. Hence there was such a tribulation as was never seen. And this Luke says, 21:23f: "there shall be tribulation, and they shall fall by the edge of the sword." But will there be a greater tribulation in the time of Antichrist? Yes; but it will not be among the Jews. And Chrysostom asks on account of what sin this happened, since not even the punishment of the Sodomites was so great — for the punishment would not be graver unless the sin were graver. And because they might say that these things happened to them on account of the sins of the Christians, therefore he says that this is not so; hence, "unless those days had been shortened, no flesh would be saved." Augustine says that some have explained it thus, that the days then were made shorter, just as in the time of Joshua a day was made longer. But against this, Psalm 118:91 says: "by your ordinance the days continue": therefore it can be said in two ways. First, that the days of the tribulation were shortened first in number. Hence if that time had lasted, all would have been slain, because no one would have remained. And why? Because the Romans ruled over the whole world, and the Jews were already dispersed throughout the whole world; therefore if that time had lasted, they would have been slain everywhere on earth. Or the days are said to be shortened, when the evils are shortened. And why are they shortened? "For the sake of the elect": not that the word of God had failed. For many of that people had been converted, and they were praying on behalf of the people that a remnant might be left; Isaiah 1:9: "unless the Lord had left us a seed, we should have been as Sodom," etc. Then Chrysostom sets forth two considerations as to why this is said: because there were some disciples there, and likewise John still lived on beyond that time. Therefore he says that John made no mention of this in his Gospel, because he wrote after this event had happened: hence he would have been telling of things past; but Matthew and Luke, who wrote beforehand, made mention of it, because at that time it was still future. Therefore he says that it was a manifest miracle that, when the Romans were attacking the Jews, and almost the whole nation of the Jews was suffering destruction, so few Jews were able to go throughout the whole world to convert almost the entire world, and this was the wondrous power of Christ. Hilary explains that these words refer to the end of the world. "When you shall see this abomination" — he names Antichrist. 2 Thessalonians 2:2: "neither be terrified, nor by spirit, nor by word, as if the day of the Lord were at hand; let no man deceive you by any means." "And then let those who are in Judea flee to the mountains"; because the Jews will fail, hence they will flee the land of the Jews, and will turn to the mountains of Christianity. "And let him who is on the housetop not come down to take anything from his house." He means to say that the perfect should not be moved from their perfection. Hence he touches upon the contemplative life, which is signified by the housetop; hence such persons ought not withdraw from their contemplation. Likewise "he who is in the field" touches upon the active life. Such persons should not turn back to their former life, but should remain in their resolve. And what is meant by "those with child"? Men weighed down by sins. Men who are nursing are imperfect men. Hence he means to say, woe to men burdened with sins, and not confirmed. According to Augustine, those with child are those who conceive the intention of acting wickedly; those nursing are those who already carry it out in deed. And what does he mean by "winter" and "sabbath"? By winter sadness is signified, by sabbath gladness. Hence, that it be not in winter through an absorbing sadness, or on the sabbath through a gladness that elates the mind. Or by "sabbath" is meant idleness from good work, by "winter" the cooling of charity. "And unless those days had been shortened" — because it will last but a little, and if it lasted, not all flesh would be saved, that is, every carnal man. Likewise these words can be referred to the coming of Christ through the Church; and thus Origen says that just as the word of the Gospel was spread abroad at his coming, so false doctrine will be spread abroad at the coming of Antichrist; and just as Christ had his prophets, so also will Antichrist. Then let those who are in the city flee to the mountains, of perfect righteousness. Those are called "with child" who are still running through the word of salvation; those "nursing" who have already accomplished something. Pray therefore that they be not hindered through idleness and torpor. "Then shall be great tribulation," because there will be a perversion of Christian doctrine through false doctrine. And "unless the days were shortened," namely by the instruction of doctrine, through additions of true doctrine, not all flesh would be saved, that is, all would turn to false doctrine.”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“And except those days should be shortened,.... That is, those days of tribulation which commenced at the siege of Jerusalem; and therefore cannot refer to the times before it, and the shortening of them by it, which were very dreadful and deplorable through the murders and robberies of the cut-throats and zealots; but to those after the siege began, which were very distressing to those that were within; and which, if they had not been shortened, or if the siege had been lengthened out further, there should no flesh be saved; not one Jew in the city of Jerusalem would have been saved; they must everyone have perished by famine, or pestilence, or sword, or by the intestine wars and murders among themselves: nor indeed, if the siege had continued, would it have fared better with the inhabitants of the other parts of the country, among whom also many of the same calamities prevailed and spread themselves; so that, in all likelihood, if these days had been continued a little longer, there had not been a Jew left in all the land. But for the elect's sake; those who were chosen in Christ, before the foundation of the world, to believe in him, and to be saved by him with an everlasting salvation; both those that were in the city, or, at least, who were to spring from some that were there, as their immediate offspring, or in future ages, and therefore they, and their posterity, must not be cut off; and also those chosen ones, and real believers, who were at Pella, and in the mountains, and other places, for the sake of these, and that they might be delivered from these pressing calamities, those days shall be shortened: for otherwise, if God had not preserved a seed, a remnant, according to the election of grace, that should be saved, they had been as Sodom and as Gomorrha, not one would have escaped. The shortening of those days is not to be understood literally, as if the natural days, in which this tribulation was, were to be shorter than usual. The Jews indeed often speak of the shortening of days in this sense, as miraculously done by God: so they say (n), that "five miracles were wrought for our father Jacob, when he went from Beersheba to go to Haran. The first miracle was, that , "the hours of the day were shortened for him", and the sun set before its time, because his word desired to speak with him.'' They also say (o), "that the day in which Ahaz died, was shortened ten hours, that they might not mourn for him; and which afterwards rose up, and in the day that Hezekiah was healed, ten hours were added to it.'' But the meaning here is, that the siege of Jerusalem, and the calamities attending it, should be sooner ended: not than God had determined, but than the sin of the Jews deserved, and the justice of God might have required in strict severity, and might be reasonably expected, considering the aggravated circumstances of their iniquities. A like manner of speech is used by the Karaite Jews (p), who say, "if we walk in our law, why is our captivity prolonged, and there is not found balm for our wounds? and why are not , "the days" of the golden and silver kingdom "lessened", for the righteousness of the righteous, which were in their days?'' (n) Targum Jonathan ben Uzziel, & Targum Hieros. in Gem xxviii. 10. (o) R. Sol. Jarchi in Isa. xxxviii. 8. (p) Chilluk M. S. apud Trigland. de sect. Karaeorum, c. 9. p. 147.”
Source
1849
A.D.
1774–1849
“No flesh: a Hebraism for no person; denoting that no one would have escaped death, had the war continued. (Witham) — All the Jews would have been destroyed by the Romans, or all the Christians by Antichrist. (Maldonatus) — From this place, Jesus Christ foretells the coming of Antichrist, and forewarns Christians of latter ages, to guard all they can against seduction.”
Source
1863
A.D.
1796–1863
“The sufferings of the Jews during the siege of Jerusalem and on the taking of the city, are described by Josephus the Jew in a manner to show that this prophecy was fulfilled. Jos. B. v. 10. 5. No man, none of the Jewish people, would have survived, unless God had decreed that a remnant should escape. " They were spared on ac- count of the Christians, His elect." St. Chrysostom. The wicked are sometimes spared on account of a small number of good men.”
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.