The interpretation timeline
Luke 2:42 Douay-Rheims

And when he was twelve years old, they going up into Jerusalem, according to the custom of the feast,

A.D. 253 – 1871 11 witnesses 19 excerpts

Patristic

before A.D. 750
253
A.D.
Origen Patristic
c. A.D. 184–253
“But as when the Jews plotted against Him He escaped from the midst of them, and was not seen; so now it seems that the Child Jesus remained, and His parents knew not where He was. As it follows, And not finding him, they returned to Jerusalem, seeking for him. (John 10:29.)”
“The holy Virgin knew that He was not the Son of Joseph, and yet calls her husband His father according to the belief of the Jews, who thought that He was conceived in the common way. Now to speak generally we may say, that the Holy Spirit honoured Joseph by the name of father, because he brought up the Child Jesus; but more technically, that it might not seem superfluous in St. Luke, bringing down the genealogy from David to Joseph. But why sought they Him sorrowing? Was it that he might have perished or been lost? It could not be. For what should cause them to dread the loss of Him whom they knew to be the Lord? But as whenever you read the Scriptures you search out their meaning with pains, not that you suppose them to have erred or to contain anything incorrect, but that the truth which they have inherent in them you are anxious to find out; so they sought Jesus, lest perchance leaving them he should have returned to heaven, thither to descend when He would. He then who seeks Jesus must go about it not carelessly and idly, as many seek Him who never find Him, but with labour and sorrow.”
Source
397
A.D.
Ambrose of Milan Patristic
A.D. 339–397
“Or the twelfth year was the commencement of our Lord’s disputation with the doctors, for this was the number of the Evangelists necessary to preach the faith.”
403
A.D.
c. A.D. 310–403
“(cont. Hær. l. ii. hær. 31.) Let Ebion know that at twelve years old, not thirty, Christ is found the astonishment of all men, wonderful and mighty in the words of grace. We can not therefore say, that after that the Spirit came to Him in Baptism He was made the Christ, that is, anointed with divinity, but from His very childhood He acknowledged both the temple and His Father.”
Source
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“(sup. Joh. Hom. 20.) The Lord truly did no miracle in His childhood, yet this one fact St. Luke mentions, which made men look with wonder upon Him.”
444
A.D.
A.D. 376–444
“The Evangelist having said before that the Child grew and waxed strong, verifies his own words when he relates, that Jesus with the holy Virgin went up to Jerusalem; as it is said, And when he was twelve years old, &c.”
“He says this then by way of shewing that He surpasses all human standards, and hinting that the Holy Virgin was made the handmaid of the work in bringing His flesh unto the world, but that He Himself was by nature and in truth God, and the Son of the Father most high. Now from this let the followers of Valentinus, hearing that the temple was of God, be ashamed to say that the Creator, and the God of the law and of the temple, is not also the Father of Christ.”
Source
735
A.D.
Bede the Venerable Patristic
c. A.D. 672–735
“We may also say, that as by the seventh number, so also by the twelfth, (which consists of the parts of seven multiplied alternately by one another,) the universality and perfection of either things or times is signified, and therefore rightly from the number twelve, the glory of Christ takes its beginning, being that by which all places and times are to be filled.”
Source
“(in Hom. post Epiph.) Now that the Lord came up every year to Jerusalem at the Passover, betokens His humility as a man, for it is man’s duty to meet together to offer sacrifices to God, and conciliate Him with prayers. Accordingly the Lord as man, did among men what God by angels commanded men to do. Hence it is said, According to the custom of the feast day. (Gal. 3:14, Judges 6:20; 13:16.) Let us follow then the journey of His mortal life, if we delight to behold the glory of His divine nature.”
Source
“To shew that He was a man, He humbly listened to the masters; but to prove that He was God, He divinely answered those who spake.”
“He blames them not that they seek Him as their son, but compels them to raise the eyes of their mind to what was rather due to Him whose eternal Son He was. Hence it follows, Knew ye not? &c.”

Reformation

c. 1500 – 1650
1637
A.D.
1567–1637
“And when He was twelve years old, they went up to Jerusalem after the custom of the feast The Syriac has “ as they had been accustomed on the feast n — namely, of the Passover”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“And when they had fulfilled the days,.... The seven days of the fear of unleavened bread, for so many days that feast was observed; and though it was not absolutely necessary, and obligatory upon them to stay all that time at Jerusalem, yet Mary and Joseph seem so to have done, as did the more religious and devout persons: as they returned; at the time when they were going from Jerusalem home again: the child Jesus tarried behind in Jerusalem; being desirous of hearing the discourses of the doctors about the sense of the Scriptures, the meaning of the laws, and the traditions of the elders, and of conversing with them: and Joseph, and his mother, knew not of it; of his intention to tarry longer, nor of his design in so doing: he did not ask leave of them, since his stay was about an affair of his heavenly Father's; and therefore this action of Christ is not to be drawn into an example, or precedent for children, to act without consulting, or asking leave of their parents. They had no notion at all of his staying behind them, nor any suspicion of it; nor did they miss him for a considerable time; which might be owing to the large numbers that went in company together, so that they could not tell but that he was in the crowd, though they did not see him; or to the men and women travelling in separate companies, as is thought; so that Joseph might think he was with Mary, and Mary might conclude he was with Joseph, till they came to the end of their first day's journey, when they came together, and then missed him.”
Source
1871
A.D.
1871
“FIRST CONSCIOUS VISIT TO JERUSALEM. (Luk 2:41-52) went up--"were wont to go." Though males only were required to go up to Jerusalem at the three annual festivals (Exo 23:14-17), devout women, when family duties permitted, went also, as did Hannah (Sa1 1:7), and, as we here see, the mother of Jesus. when twelve years old--At this age every Jewish boy was styled "a son of the law," being put under a course of instruction and trained to fasting and attendance on public worship, besides being set to learn a trade. At this age accordingly our Lord is taken up for the first time to Jerusalem, at the passover season, the chief of the three annual festivals. But oh, with what thoughts and feelings must this Youth have gone up! Long ere He beheld it, He had doubtless "loved the habitation of God's house and the place where His honor dwelt" (Psa 26:8), a love nourished, we may be sure, by that "word hid in His heart," with which in afterlife He showed so perfect a familiarity. As the time for His first visit approached, could one's ear have caught the breathings of His young soul, he might have heard Him whispering, "As the hart panteth after the water brooks, so panteth my soul after Thee, O God. The Lord loveth the gates of Zion more than all the dwellings of Jacob. I was glad when they said unto me, Let us go unto the house of the Lord. Our feet shall stand within thy gates, O Jerusalem!" (Psa 42:1; Psa 87:2; Psa 122:1-2). On catching the first view of "the city of their solemnities," and high above all in it, "the place of God's rest," we hear Him saying to Himself, "Beautiful for situation, the joy of the whole earth is Mount Zion, on the sides of the north, the city of the great King: Out of Zion, the perfection of beauty, God doth shine" (Psa 48:2; Psa 50:2). Of His feelings or actions during all the eight days of the feast not a word is said. As a devout child, in company with its parents, He would go through the services, keeping His thoughts to Himself. But methinks I hear Him, after the sublime services of that feast, saying to Himself, "He brought me to the banqueting house, and his banner over me was love. I sat down under his shadow with great delight, and his fruit was sweet to my taste" (Sol 2:3-4).”
Source

Undated

date unknown
date
unknown
“(Geometer) His indication of wisdom did not exceed the measure of His age, but at the time that with us the powers of discernment are generally perfected, the wisdom of Christ shews itself.”
date
unknown
Glossa Ordinaria Medieval
“(ordin.) They were on their way home, one day’s journey from Jerusalem; on the second day they seek for Him among their kinsfolk and acquaintance, and when they found Him not, they returned on the third day to Jerusalem, and there they found Him. As it follows, And it came to pass, after three days they found him.”
“(ubi sup.) Or because the advent of Christ, which was looked for by the Patriarchs before the Law, was not found, nor again, that which was sought for by prophets and just men under the Law, but that alone is found which is sought for by Gentiles under grace.”
“(ordin.) Or they feared lest Herod who sought Him in His infancy, now that He was advanced to boyhood might find an opportunity of putting Him to death.”
date
unknown
“(Metaphrastes et Geometer.) But the Lord Himself sets every thing at rest, and correcting as it were her saying concerning him who was His reputed father, manifests His true Father, teaching us not to walk on the ground, but to raise ourselves on high, as it follows, And he says unto them, What is it that you ask of me?”
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.