Luther started the Protestant Reformation in 1517. However, in the year before his death the Romish Council of Trent started giving its reply, in 1545.
This resulted in the 1562 Catechism of Trent, which is still Rome's official doctrine even today. There, it is wrongly alleged that the weekly sabbath was not "a natural principle" alias a creation ordinance. Instead, the weekly sabbath is averred to have existed only "from the time the people of Israel were liberated from the bondage of Pharaoh."
Furthermore, Rome there even claims that the obligation to keep the weekly sabbath was destined "to cease together with the abrogation of other Jewish[!] rites and ceremonies namely at the death of Christ.” For “it has pleased the Church[!]…that the religious celebration of the sabbath day shall be transferred to the Lord’s day” and the “other[!] days."1