Do Protestant writers acknowledge the same?

Answer

They do.
NOTE - "IS there no express commandment for observing the first day of the week as Sabbath,
instead of the seventh day?-None whatever. Neither Christ, nor His apostles, nor the first Christians
celebrated the first day of the week instead of the seventh as the Sabbath."-New York Weekly Tribune,
May 24, 1900.
"The Scriptures nowhere call the first day of the week the Sabbath. . . . There is no Scriptural
authority for so doing, nor of course any Scriptural obligation." The Watchman (Baptist).
"The observance of the first instead of the seventh day rests on the testimony of the church, and
the church alone.' -- Hobart Church News, July 2, 1894.
For additional testimonies, see reading on page 146.

What encouragement is held out as an aid in attaining this experience?
For what purpose did Christ come into the world?
What interpretation is given to this little horn?
In what sense does the angel Gabriel explain John the Baptist to be the Elijah of Mal. 4: 5?
What does the Psalmist say about the dead praising God?
How will the righteous ever afterward appear?
How are God's remnant people described?

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