Whatever you do, while you attempt to live like a Jew under the law, don't do any labor from Friday 6pm to Saturday 6pm or it's the death penalty for you (Numbers 15:32-35).

But, did Paul or Jesus ever say not to observe the sabbath?  Jesus went to the synagogue seemingly every week. As it says in the gospel: King James Bible, Luke 4:16 And he came to Nazareth, where he had been brought up: and, as his custom was, he went into the synagogue on the sabbath day, and stood up for to read. So, Jesus did not break the Sabbath, and to my knowledge did not tell us to do so.

Sabbath is part of the Mosaic law, which Paul said is bondage. That to observe days and months and times and years, made Paul worried that he had spent all his time on them in vain. Careful observance of Sabbaths, of New moons, of feasts and festivals, particularly those associated with Judaism and the law, meant they were trusting in those things, rather than the simplicity of faith in the grace of Jesus Christ for salvation. So in a sense, yes we were told not to.

Personally i feel that this subject is a non-issue.

I think someone who goes extremely paranoid to the point that they must hid everything they do for or give to God for fear someone might see it and praise them and thereby "steal their rewards", thinks too much of themselves and in a way also has their reward in their ability to hid their christian works. We shouldn't worry about what others see us give or what they see us do. We should however so shine that when they do see those deeds that we do they will turn and praise God. Matthew 5:16 Let your light so shine before men, that they may see your good works, and glorify your Father which is in heaven.