The feast days of Israel prove the church began at Pentecost.
There is nothing in the feast days indication Paul began anything.
but he did continue in what was started at Pentecost and taught the same gospel.
Act 11:1 And the apostles and brethren that were in Judaea heard that the Gentiles had also received the word of God.
Act 11:2 And when Peter was come up to Jerusalem, they that were of the circumcision contended with him,
Act 11:3 Saying, Thou wentest in to men uncircumcised, and didst eat with them.
Act 11:4 But Peter rehearsed the matter from the beginning, and expounded it by order unto them, saying,
Act 11:5 I was in the city of Joppa praying: and in a trance I saw a vision, A certain vessel descend, as it had been a great sheet, let down from heaven by four corners; and it came even to me:
Act 11:6 Upon the which when I had fastened mine eyes, I considered, and saw fourfooted beasts of the earth, and wild beasts, and creeping things, and fowls of the air.
Act 11:7 And I heard a voice saying unto me, Arise, Peter; slay and eat.
Act 11:8 But I said, Not so, Lord: for nothing common or unclean hath at any time entered into my mouth.
Act 11:9 But the voice answered me again from heaven, What God hath cleansed, that call not thou common.
Act 11:10 And this was done three times: and all were drawn up again into heaven.
Act 11:11 And, behold, immediately there were three men already come unto the house where I was, sent from Caesarea unto me.
Act 11:12 And the Spirit bade me go with them, nothing doubting. Moreover these six brethren accompanied me, and we entered into the man's house:
Act 11:13 And he shewed us how he had seen an angel in his house, which stood and said unto him, Send men to Joppa, and call for Simon, whose surname is Peter;
Act 11:14 Who shall tell thee words, whereby thou and all thy house shall be saved.
Act 11:15 And as I began to speak, the Holy Ghost fell on them, as on us at the beginning.
Act 11:16 Then remembered I the word of the Lord, how that he said, John indeed baptized with water; but ye shall be baptized with the Holy Ghost.
Act 11:17 Forasmuch then as God gave them the like gift as he did unto us, who believed on the Lord Jesus Christ; what was I, that I could withstand God?
Act 11:18 When they heard these things, they held their peace, and glorified God, saying, Then hath God also to the Gentiles granted repentance unto life.
Act 15:7 And when there had been much disputing, Peter rose up, and said unto them, Men and brethren, ye know how that a good while ago God made choice among us, that the Gentiles by my mouth should hear the word of the gospel, and believe.
Act 15:8 And God, which knoweth the hearts, bare them witness, giving them the Holy Ghost, even as he did unto us;
Act 15:9 And put no difference between us and them, purifying their hearts by faith.
Act 15:10 Now therefore why tempt ye God, to put a yoke upon the neck of the disciples, which neither our fathers nor we were able to bear?
Act 15:11 But we believe that through the grace of the Lord Jesus Christ we shall be saved, even as they.
Act 19:1 And it came to pass, that, while Apollos was at Corinth, Paul having passed through the upper coasts came to Ephesus: and finding certain disciples,
Act 19:2 He said unto them, Have ye received the Holy Ghost since ye believed? And they said unto him, We have not so much as heard whether there be any Holy Ghost.
Act 19:3 And he said unto them, Unto what then were ye baptized? And they said, Unto John's baptism.
Act 19:4 Then said Paul, John verily baptized with the baptism of repentance, saying unto the people, that they should believe on him which should come after him, that is, on Christ Jesus.
Act 19:5 When they heard this, they were baptized in the name of the Lord Jesus.
Act 19:6 And when Paul had laid his hands upon them, the Holy Ghost came on them; and they spake with tongues, and prophesied.
as it was on the day of Pentecost for the 3000, the members of Christ's Church--
Act 2:22 Ye men of Israel, hear these words; Jesus of Nazareth, a man approved of God among you by miracles and wonders and signs, which God did by him in the midst of you, as ye yourselves also know:
Act 2:23 Him, being delivered by the determinate counsel and foreknowledge of God, ye have taken, and by wicked hands have crucified and slain:
Act 2:24 Whom God hath raised up, having loosed the pains of death: because it was not possible that he should be holden of it.
Act 2:34 For David is not ascended into the heavens: but he saith himself, The LORD said unto my Lord, Sit thou on my right hand,
Act 2:35 Until I make thy foes thy footstool.
Act 2:36 Therefore let all the house of Israel know assuredly, that God hath made that same Jesus, whom ye have crucified, both Lord and Christ.
Act 2:37 Now when they heard this, they were pricked in their heart, and said unto Peter and to the rest of the apostles, Men and brethren, what shall we do?
Act 2:38 Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost.
Act 2:39 For the promise is unto you, and to your children, and to all that are afar off, even as many as the Lord our God shall call.
Act 2:40 And with many other words did he testify and exhort, saying, Save yourselves from this untoward generation.
Act 2:41 Then they that gladly received his word were baptized: and the same day there were added unto them about three thousand souls.
(Then totaling 3120)
Act 2:42 And they continued stedfastly in the apostles' doctrine and fellowship, and in breaking of bread, and in prayers. Act 2:43 And fear came upon every soul: and many wonders and signs were done by the apostles.
Act 2:44 And all that believed were together, and had all things common;
Act 2:45 And sold their possessions and goods, and parted them to all men, as every man had need.
Act 2:46 And they, continuing daily with one accord in the temple, and breaking bread from house to house, did eat their meat with gladness and singleness of heart,
Act 2:47 Praising God, and having favour with all the people. And the Lord added to the church daily such as should be saved.
LA