Donna,
Did I get carried away and miss the question you asked? The Sabbath was a day of rest for mankind, not a day of worship. We should worship God every day and not restrict ourselves to any one day. Sunday was set up by the Catholic Church, as a dispensation, separating it from the Jewish Sabbath, supposedly to honor the Resurrection of Christ. Early Christians began worshiping on Sunday in honor of the Resurrection but :
In the year 321 A.D., Constantine decreed, "On the venerable day of the Sun let the magistrates and people residing in cities rest, and let all workshops be closed" (Codex Justinianus lib. 3, tit. 12, 3; trans. in Philip Schaff, History of the Christian Church, Vol. 3, p. 380, note 1). Constantine seems to have made this change himself and not through the papacy, since the papacy had not really come in to being at that time. The papacy grew gradually out of the office of Bishop and for many years this was centered in Rome. In any case, it should be noted that in doing this, Constantine is not changing the Sabbath; he is merely making Sunday the official day of rest for the Roman Empire.