The sabbath is a sadly contentious issue within the Church. There is much dispute over what day it is, and how we should behave on it. It is rather strange to me that the most common attitude is "the Sabbath is Sunday, therefore we should be going to church!" How silly! First, the Sabbath was not a Sunday, and second, the point of Sabbath observance was not to attend a worship service, but to cease from regular work.
The latter principle is actually why the Sabbath is the only one of the 10 commandments that is not only overlooked in the New Testament, but is also explicitly repealed. Various passages, such as Romans 14 and Colossians 2, tell us quite clearly that you are free to partake of, or abstain from, any special occasion your conscience leads you to, up to and including the Sabbath. You can have your special days, or you can esteem all days alike, and you are to let no one judge you for it.
The beauty of the Sabbath comes from the depth of its symbolism. On the 7th day of creation, God ceased from His works. He "rested", not because He needed rest, but because His work was actually finished. And what did the Lord declare in His final words? "It is finished". Thus, as Christians, we actually observe the Sabbath just by virtue of our faith. We are in God's rest, because there remains no more work to do for our salvation. We don't need to work for it, and indeed if we try, we have fallen outside of it (Galatians 5:4). Thus, we need to cease from bickering about when the Sabbath is and what we should do upon it, and instead rejoice that our Sabbath rest has come, and praise God for what He has done through the Son.