Jesus attended church on Sabbath

IF Jesus had nailed the 10 Commandments including His Seventh-day Sabbath on the cross, then why did he say “the Son of man is Lord also of the Sabbath,”(Mark 2:27-28)?
Why would he also say “if you love me keep my commandments,” (John 14:15)?
It was Jesus’ custom to go to church on Sabbath (Luke 4:16, 31) and Paul’s manner to go to church on Sabbath (Acts 17:2; 18:4).
Please tell us where in the scriptures did Jesus instruct Paul or any of His disciples to change the Sabbath day?
Jesus nailed on the cross the yearly Sabbath days (Leviticus 23) and not the weekly seventh-day Sabbath (Gen. 2:2-3).

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