It’s a false argument. There are no days holier than any other, now. Even the Resurrection Sunday as an observance is merely an emotional and historical celebration, as we are to treat all days as holy, and every moment we are to pursue His righteousness. We attend church on Sunday as a human point of reflection on the day Christ was risen. Paul made it crystal clear in Galatians that the practice of setting aside days, months and seasons, as well as circumcision and other practices of the law, were enslavement to customs rather than pursuits of holiness. And I’ll go one further and say that to practice such observances today, is to take part in what is now the synagogue of Satan. So, unless you’re aligning yourself with those blood drinking suckers of baby dicks, there is no “Sabbath” any longer.