Saturday (the seventh day of the week) is the Jewish Sabbath. The commandment to keep it holy is part of the Mosaic Law. Christians are not obligated to observe any part of the Law of Moses. <br>As far as Christians are concerned, every day is the Lord's day. We choose to worship on Sunday because Christ rose from the dead on Sunday (the first day of the week). Also, Paul told Christians to put aside money on the first day of the week. (1 Cor. 16:2) If Christian want to use another day (any day) as their "go to church day" there is nothing in the Bible that forbids it.<br>