Will the Roman Catholic Church Enforce a Sunday Law?

Yes.

Daniels writes that the 8th King will speak great words against God, will wear out the saints of God, and think to change times and laws:

Daniel 7:25 King James Version (KJV)
25 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.

Daniels writes that the 8th King will “wear out the saints of the most High”:

Daniel 7:25 King James Version (KJV)
25 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.

Daniels writes that the 8th King will “think to change times and laws”:

Daniel 7:25 King James Version (KJV)
25 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.

THIS ANSWER IS NOT EVEN 1% COMPLETE, BUT WILL BE COMPLETED SHORTLY.