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.

How highly does God regard obedience?
What do the works of God declare?
On what day was John in the Spirit?
Would God have His people unite in these combinations?
Of whom does the Bible teach that God is a rewarder?
4. And when the new heavens and the new earth have appeared, and the holy city, New Jerusalem, then he made?
What peaceful condition will prevail in the earth made new?

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