Well, we have no Savior to trust in but Jesus Christ, who was, according to the flesh, a Jew—no other apostles and prophets, but Jewish—no other than Jewish Scriptures, and indeed, Jesus said himself, that… John 4:22 ...salvation is of the Jews.
Q: What did Matthew mean in the 6th year of the Christian church? ---He certainly did not mean the first day of the week, but he meant the day before the first day of the week. Matthew 28:1 In the end of the sabbath, as it began to dawn toward the first day of the week, came Mary Magdalene and the other Mary to see the sepulchre.
He meant what all other Jewish writers ever meant, viz: Exodus 20:10 The seventh day is the Sabbath of the Lord your God.
But neither Matthew nor any of the Apostles ever told us a word about the Sabbath being changed from the seventh to the first day of the week."
James White