Sabbath Hours Not Ours but God's. God has given us the whole of six days in which to do our work, and has reserved only one to Himself. This should be a day of blessing to us, a day when we should lay aside all our secular matters and center our thoughts upon God and heaven. The Sabbath (or Sabbat) is a weekly day of rest and/or worship that is observed in the Judeo-Christian faiths. The term derives from the Hebrew shavat, "(to) cease". The term was first used in the biblical account of the last day of creation. It was repeated, as a commandment, as the fourth of the Ten Commandments.
The Roman Catholic church made the change over three centuries after calvary.
Question: Why do we observe sunday instead of saturday?
Answer: We observe sunday because the Catholic church in the council of Laodicea, transferred the solemnity from saturday to sunday.
(Peter Geiermann Convert´s Catechism of Catholic Doctrine)
In the law given from Sinai, God recognized the week, and the facts upon which it is based. After giving the command, "Remember the Sabbath day to keep it holy," and specifying what shall be done on the six days, and what shall not be done on the seventh, he states the reason for thus observing the week, by pointing back to his own example: "For in six days the Lord made heaven and earth, the sea, and all that in them is, and rested the seventh day; wherefore the Lord blessed the Sabbath day, and hallowed it." [EX. 20:8-11.] On the seventh day man is to refrain from labor, in commemoration of the Creator's rest.
