Is the 7th Day Sabbath for Christians? Well, let's see, the 4th Commandment commands we "remember the Sabbath". Jesus Christ observed all His life the Sabbath. Christ's Apostles and followers up to the 4th Century kept the Sabbath despite a shift to Sunday keeping. After Constantine made Sunday the official day of worship hundreds of thousands of true Christians continued to observe the Sabbath, often persecuted and put to death for their trouble. They also kept God's annual Holy Days, including the Passover/Lord's Supper on the 14th Nisan. They do so now, small in number but fervent in faith and obedience to God's commands.