So why have churches made it Sunday? This is something I am definitely going to read up on more.
Are there any other similarities to Judaism?
Christianity is a sect of Judaism. However - Adventists do not keep the Leviticus 23 annual feast days because in Hebrews 10 we find that all the liturgy related to sacrifices and offerings was fulfilled/deleted at the cross --
Acts 24:14 "But this I admit to you, that according to the Way which they (non-Christian Jewish accusers of Paul)
call a sect I do serve the God of our fathers, believing everything that is in accordance with the Law and that is written in the Prophets";
Showing Christianity as a sect of Judaism
In Acts 23 we find this telling statement when Paul is on trial - accused by non-Christian Jews and tried before a Roman governor.
Acts 23
6 But perceiving that one group were Sadducees and the other Pharisees, Paul
began crying out in the Council, “Brethren,
I am a Pharisee, a son of Pharisees; I am on trial for the hope and resurrection of the dead!” 7 As he said this, there occurred a dissension between the Pharisees and Sadducees, and the assembly was divided. 8 For the Sadducees say that there is no resurrection, nor an angel, nor a spirit, but the Pharisees acknowledge them all. 9 And there occurred a great uproar; and some of the scribes of the
Pharisaic party stood up and began to argue heatedly, saying,
“We find nothing wrong with this man; suppose a spirit or an angel has spoken to him?”
In other words - non-Christian Pharisees claim there is no issue with the teaching / claims of Paul -- in a court of law when it comes to Judaism. They may not agree with his specific claims about Christ but making a claim about the Messiah .. saying this or that person is the Messiah predicted in the Jewish scripture - is not anti-Pharisee nor does it make you a member of "Another religion".
In Acts 17:11 this is said of non-Christian Jews and God-fearing Gentiles who accepted the Bible
"they studied the scriptures daily to SEE IF those things spoken to them by the Apostle Paul - were so"
They had no "scriptures" at that time other than the OT text - ... Christianity was viewed as a sect of Judaism.
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However both Sunday and Saturday churches do agree to one thing -- all TEN of the Ten commandments apply to Christians
The Baptist Confession of Faith,
the Westminster Confession of Faith ,
D.L. Moody,
R.C Sproul,
Matthew Henry,
Thomas Watson
Eastern Orthodox Catechism
The Catholic Catechism.