Act 13:42 So when the Jews went out of the synagogue, the Gentiles begged that these words might be preached to them the next Sabbath.
Act 13:44 On the next Sabbath almost the whole city came together to hear the word of God.
You suppose "almost the whole city" of Antioch in Pisidia were Jews? How about Philippi in Macedonia?
Act 16:12 and from there to Philippi, which is the foremost city of that part of Macedonia, a colony. And we were staying in that city for some days.
Act 16:13 And on the Sabbath day we went out of the city to the riverside, where prayer was customarily made; and we sat down and spoke to the women who met there.
Act 17:2 Then Paul, as his custom was, went in to them, and for three Sabbaths reasoned with them from the Scriptures,
This is in Thessalonica, another GENTILE city.
Why didn't Paul EVER spill the beans about the Sabbath not being required? If we should be worshipping on some other day, why didn't anybody say anything about it? Why is the entirety of the New Testament silent about a change in the day of worship?