Galatians, what a misunderstood book!
"Often, one of the first things a nominal Christian will say when you tell them the law has not been abolished is: "you need to read the book of Galatians!" In spite of the multitude of scriptures in the "New Testament" which demonstrate we should keep Yahweh's law, many understand Paul's letter to Galatians to state otherwise.
In reality, there is not a single verse in the book of Galatians or anywhere in the scripture that would tell us that the law has been abolished. Rather, much to the contrary! The book of Galatians actually proves that while we are not saved by our observance of the Torah (The Hebrew word translated "Law" all throughout the scriptures), true believers will make a sincere effort to walk in its precepts.
In this study we will go through each of the verses in Galatians chapter 2 through chapter 5, which contain the key verses speaking of Yahweh's Torah/law and its place in our life. It is the words in these chapters that are most frequently understood as "abolishing the law". Thus, we will examine them to see if Paul is really making any claim that the law is now abolished and not to be heeded......"
http://www.eliyah.com/galatians3kjv.html
Acts 18:4 - And he reasoned in the synagogue every sabbath, and persuaded the Jews and the Greeks.
"Truly, the Sabbath was not for Jews only. "
"Did Paul do one thing and preach another? Did he preach that the Sabbath had been abolished but yet keep the Sabbath himself? Did He really call the Galatians (some of whom were Jewish) "foolish" for observing the Sabbath day and then be a hypocrite by observing it himself?"
http://www.eliyah.com/ysabbath.htm
Acts 16: 1-3 NIV "He came to Derbe and then to Lystra, where a disciple named Timothy lived, whose mother was a Jewess and a believer, but whose father was a Greek. The brothers at Lystra and Iconium spoke well of him. Paul wanted to take him along on the journey, so he circumcised him."
Reslight.net