Sabbath is Forever

The Sabbath is a sign between God and the children of Israel forever.

Wherefore the children of Israel shall keep the sabbath, to observe the sabbath throughout their generations, for a perpetual covenant. It is a sign between me and the children of Israel for ever: for in six days the LORD made heaven and earth, and on the seventh day he rested, and was refreshed.
- Exodus 31:16-17 (KJV)

Perpetual means never-ending.

Note that under the New Covenant we are the children of Israel.

And if ye be Christ's, then are ye Abraham's seed, and heirs according to the promise.
- Galatians 3:29 (KJV)

Satan has changed Sabbath to Sunday. It's his mark.

And he shall speak great words against the most High, and shall wear out the saints of the most High, and think to change times and laws: and they shall be given into his hand until a time and times and the dividing of time.
- Daniel 7:25 (KJV)

If you keep the Sabbath it is a sign that you belong to God. If you keep the Sunday it is a sign that you belong to the antichrist.

Who do you belong to?