Sunday nonsense was instituted at Lao DiCea in 364 AD.
Prior to that there was some traditional Shabbat worship and some pagan worship.
That council was when the massacre of Yeshua’s true followers began in earnest.
“Sunday nonsense was instituted at Lao DiCea in 364 AD.”
LOL, Justin Martyr gives witness that the Apostles worshipped ON THE FIRST DAY OF THE WEEK, since this was the day Jesus rose from the dead.
Christians do not keep the 7th day sabbath, since to do so, would mean we deny Jesus Christ has come and fulfilled the law. Christians are free from the ceremonial law, and are only bound to the law of Christ, which is the law of love.
Jesus Christ is our sabbath, Christians rest IN HIM.
This is not true.
The Apostles would attend the synagogue on Saturday and then get together for a Eucharistic meal on Sunday.
Read the Early Church Fathers who knew the apostles.