Original sentence: Others reject this belief system, noting that the choice of one day or another as the "seventh" in a repeating cycle is inevitably arbitrary; for most people, the week begins on Monday in any case.So long as one day of seven is kept as a sabbath, the principle has been kept.They keep Saturday as the Sabbath as they believe God commanded as early as creation, as it commemorates creation
Edited sentence: They keep the 7th day as Sabbath as commanded by God as early as creation as it commemorates creation