To broaden your perspective on the gospel, please read this stellar selection of excerpts from The Incredible Human Potential. They are taken from Chapter 2, “The Startling Revelation of What Was Christ’s Gospel.”
Does it make any difference which days we observe—or whether we keep them? Does the Bible establish whether we are to keep certain days holy to God? Were these days given to ancient Israel only? Are they binding today only on the Jewish people, while Christians are commanded to keep holidays such as Christmas?