What do Catholics say of the observance of Sunday by Protestants?

Answer

"It was the Catholic Church which, by the authority of Jesus Christ, has transferred this rest to the Sunday
in remembrance of the resurrection of our Lord. Thus the observance of Sunday by the Protestants is an
homage they pay, in spite of themselves, to the authority of the [Catholic] church. "-"Plain Talk About the
Protestantism of Today," by Mgr. Segur, page 213.

What is said of the tender compassion of God?
What is Christ's relation to this faith?
How great was the agony of His soul?
What marked the climax of Babylon's apostasy?
16. What striking testimony is borne by Neander, the noted church historian, regarding the origin of the Sunday Sabbath?
For whose sake did Christ say the period of papal persecution would be shortened?
What will the saints do in the new earth?

Questions & Answers are from the book Bible Readings for the Home Circle