There are two types of church.
One is the church which is built on the foundation of its own method,
the doctrine of men’s rules or man-made principles.
The other is the church which is built on the foundation of the Apostles,
the Sabbath that was established by God and kept by Christ Jesus and the Apostles in Early Church.

Among two churches, which one will be approved by God Elohim?
Of course, it must be the latter one.

It is the Church of God that was set up by Christ Jesus and that had the God’s teachings
and laws and commands such as the Sabbath.

Eph 2:19~20 Consequently, you are no longer foreigners and aliens, but fellow citizens with God's people and members of God's household, built on the foundation of the apostles and prophets, with Christ Jesus himself as the chief cornerstone.

The remarkable Apostle Paul definitely kept every Sabbath according to God teachings.
There are no records that Christ Jesus didn’t keep the Sabbath,
nor the Earth Church kept the Sunday service in the Bible.

Ac 18:1~4 After this, Paul left Athens and went to Corinth. He was a tentmaker and he stayed and worked with them. Every Sabbath he reasoned in the synagogue, trying to persuade Jews and Greeks.

If the church wants to be approved by God as the faithful church,
it has to show the authentic acts of keeping the Sabbath,
otherwise it would turn out to be full of falsehood, sham and hypocrisy.