The short answer: no. But understanding why opens up an extraordinary appreciation for the breadth and depth of God’s plan in redeeming his people.
Here are the notes from our latest worldview study. The path to the conclusion was pretty complex and intense, but I think where we ended was clear and well-supported:
There is ample biblical evidence that the Sabbath is strictly a sign of the Mosaic covenant. There is no biblical evidence that it should be observed by Christians, and a fair amount pointing the other way. It has been fulfilled in Jesus (see Matthew 11:28), and so we now live in an eternal, spiritual Sabbath, which the repeating, physical Sabbath pointed to. Thus, observing any kind of Sabbath day is purely a matter of conscience—we are free to do it or not, as our own convictions require.