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.

Can we close our ears to truth, and remain innocent before God?
What are some good fruits of proper child training?
What was to be the nature of the next kingdom after Babylon?
What was the Lord's covenant which they were to keep as their part of this covenant?
What famine will come at this time upon those who have rejected God's messages of mercy?
15. Were there to he no resurrection of the dead, what would be the condition of those fallen asleep in Christ?
How does God anticipate the needs of His children?

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