Did God Change the Day?

Is there any pronouncement from God that changes the Sabbath from the seventh to the first day of the week? Most Christians accept the Ten Commandments as a valid guide to live by. God gave them to Moses and His people, Israel, at Sinai. Moses reminded Israel:

“These are THE COMMANDMENTS THE LORD PROCLAIMED IN A LOUD VOICE to your whole assembly there on the mountain from out of the fire, the cloud and the deep darkness; and he added nothing more. THEN HE WROTE THEM ON TWO STONE TABLETS AND GAVE THEM TO ME.”
—Deuteronomy 5:22.

The Ten Commandments are the only message God has ever personally written out for the human race. They are so important, He wrote them on stone with His own finger (Exodus 31:18). In the fourth commandment God instructs us: