The word used is sabbath and Jesus is the lord of the sabbath. The problem is you can not prove that Sunday replaces Saturday for the sabbath day using the Bible. The seventh day(Saturday)was sanctified before Moses or Abraham Genesis 2:3 that is before the Hebrews. Paul had Timothy circumcised Acts 16:3 not because the law of Moses but because of Genesis 17:10. As many times the Lord was accused of breaking the sabbath I would expect that had the Church adopted Sunday at an early date then it would have been mentioned as an issue in Acts or the epistles on account that Gentiles were a Minority and Jews would have argued about it.
Actually, they probably picked Sunday because the Jews had Saturday and the Christian church was a subset of Judaism for a while. They were still good Jews on Saturday and celebrated as Christians on Sunday. That’s why there was a debate about allowing Gentiles into the church.
By that time, the Law had been fulfilled. The church was teaching that dietary laws and circumcision rules were no longer required. Sunday was kept because they really didn’t see any Scriptural requirement for the actual physical day. It should just be the Seventh Day.
The SDA criticism of the Catholic Church is likely misplaced. The Eastern Orthodox Church is probably the real perpetrator.
***The problem is you can not prove that Sunday replaces Saturday for the sabbath day using the Bible. ***
You are again hung upon the day. The early Christians met on the day Christ told them to meet, PENTECOST. Pentecost always comes on a SUNDAY.
The Holy Spirit came down on them on the day of PENTECOST. They have met every seven days since then. They do not gather to honor SUNDAY. They gather to honor the LORD JESUS CHRIST.