I want to commend Justo Gonzalez’s new book, A Brief History of Sunday: From the New Testament to the New Creation.
The story is gnarly, there are some questions we may never answer, but the fact is clear:
Christians have established Sunday as a day of worship, fellowship, and rest.
Major theologians in the history of the church, and at each major juncture of the church — Constantine, Aquinas, Calvin, Luther, Wesley — Sunday was in the news!
Worth your read.