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 is God's love able to do for His children?
How then do all become children of God?
After giving instruction by the use of parables, what question did Christ ask His disciples?
What was the fourth beast declared to be?
What time intervenes between the two resurrections?
What kind of mind is not subject to the law of God?
With whose blood was the new covenant dedicated?

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