SEV Biblia, Chapter 2:20
El sol se volver en tinieblas, y la luna en sangre, antes que venga el día del Seor, Grande y manifiesto;
Clarke's Bible Commentary - Acts 2:20
Verse 20. 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 Matt. xxiv. 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.
John Gill's Bible Commentary
Ver. 20. The sun shall be turned into darkness , etc.] As at the death of Christ, by a total eclipse of it: and the moon into blood ; as at the opening of the sixth seal, ( Revelation 6:12) before that great and notable day of the Lord come ; when he shall come in power and great glory, as he did in a few years after this, to take vengeance on the Jews, and destroy their nation, city, and temple; in which there was a display of his greatness, and power, and which was awful and terrible to them, as in Joel it is called; (See Gill on Matthew 24:29).
Matthew Henry Commentary
Verses 14-21 - Peter's sermon shows that he was thoroughly recovered from his fall and thoroughly restored to the Divine favour; for he who had denie Christ, now boldly confessed him. His account of the miraculous pourin forth of the Spirit, was designed to awaken the hearers to embrace the faith of Christ, and to join themselves to his church. It was the fulfilling the Scripture, and the fruit of Christ's resurrection an ascension, and proof of both. Though Peter was filled with the Holy Ghost, and spake with tongues as the Spirit gave him utterance, yet he did not think to set aside the Scriptures. Christ's scholars neve learn above their Bible; and the Spirit is given, not to do away the Scriptures, but to enable us to understand, approve, and obey them Assuredly none will escape the condemnation of the great day, excep those who call upon the name of the Lord, in and through his Son Jesu Christ, as the Saviour of sinners, and the Judge of all mankind.
Greek Textus Receptus
ο 3588 T-NSM ηλιος 2246 N-NSM μεταστραφησεται 3344 5691 V-2FPI-3S εις 1519 PREP σκοτος 4655 N-ASN και 2532 CONJ η 3588 T-NSF σεληνη 4582 N-NSF εις 1519 PREP αιμα 129 N-ASN πριν 4250 ADV η 2228 PRT ελθειν 2064 5629 V-2AAN την 3588 T-ASF ημεραν 2250 N-ASF κυριου 2962 N-GSM την 3588 T-ASF μεγαλην 3173 A-ASF και 2532 CONJ επιφανη 2016 A-ASF
Vincent's NT Word Studies
20. That great and notable day of the Lord come. The Rev. heightens the emphasis by following the Greek order, the day of the Lord, that great and notable day. Notable (epifanh) only here in New Testament. The kindred noun ejpifaneia, appearing (compare our word Epiphany), is often used of the second coming of the Lord. See 1 Tim. vi. 14; 2 Timothy iv. 1; Tit. ii. 13.
Robertson's NT Word Studies
2:20 {Shall be turned} (metastrafesetai). Second future passive of metastrefw, common verb, but only three times in the N.T. (#Ac 2:20 from Joel; #Jas 4:9; Ga 1:7). These are the "wonders" or portents of verse #19. It is worth noting that Peter interprets these "portents" as fulfilled on the Day of Pentecost, though no such change of the sun into darkness or of the moon into blood is recorded. Clearly Peter does not interpret the symbolism of Joel in literal terms. this method of Peter may be of some service in the Book of Revelation where so many apocalyptic symbols occur as well as in the great Eschatological Discourse of Jesus in #Mt 24,25. In #Mt 24:6,29 Jesus had spoken of wars on earth and wonders in heaven. {Before the day of the Lord come, that great and notable day} (prin elqein hemeran kuriou ten megalen kai epifane). The use of prin with the infinitive and the accusative of general reference is a regular Greek idiom. The use of the adjectives with the article is also good Greek, though the article is not here repeated as in #1:25. The Day of the Lord is a definite conception without the article. {Notable} (epifane) is the same root as epiphany (epifaneia) used of the Second Coming of Christ (#2Th 2:8; 1Ti 6:14; 2Ti 4:1; Tit 2:13). It translates here the Hebrew word for "terrible." In the Epistles the Day of the Lord is applied (Knowling) to the Coming of Christ for judgment (#1Th 5:2; 1Co 1:8; 2Co 1:14; Php 1:10).