But the theory that each weekday is a Sabbath in practice results on each Sabbath being a week day. Ultimately no real worship is offered to God because nothing really matters. It is a human desire to wish to celebrate and share with others the good news of unusual achievements. Players and fans celebrate the winning of a game. A father celebrates the birth of his new born.
Students celebrate their graduation.
A couple celebrates with their friends their engagement or wedding. So a Christian celebrates on the Sabbath the Good News of what God has done for His people, of what He is doing for them, and of what He will do for them. Yet for some groups mentioned above, the Sabbath is not Good News but bad news. Principally because of different understandings and acceptance of the message of the Sabbath. Obviously a person cannot joyfully celebrate the Sabbath if he or she does not know what is there to celebrate.