Sabbath observance was given only to the Jews and ended with Mosaic Law Deut. 5:15; Ex. 31:13; Rom. 10:4; Gal. 4:9, 10; Col. 2:16, 17

Sunday worship has its origin in the Roman Catholic Church. It was inherited and retained by the Protestant churches after the Reformation. See "Day of Worship--Roman Catholic" for details.