To sabbath is to cease, or to rest. God sabbathed – rested – on the seventh day, after creating the universe. Later, God commanded the ancient Israelites to observe a weekly day of rest as a sign and symbol of God’s provision for them… both in creation, and while they traveled in the wilderness after He freed them from slavery in Egypt.
Did Constantine change the Sabbath from Saturday to Sunday? The Edict of Milan is a proclamation by Roman emperor Constantine I, given in 313 AD, that ensured the right of all Roman citizens to worship freely. It also instructed that any property that had been confiscated from Christians should be returned.