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.

12. After the subjects of the kingdom have been determined by the investigative judgment, what is given to Christ?
What special reason is given for this?
What was the effect of this apostasy?
What statement of the redeemed shows that they will remember God's creative power?
To whom, then, should its observance be rendered?
What does Christ proclaim Himself to be?
In his dream at Bethel, what did Jacob see?

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