The Dawn of the Five Day Work Week?

From the June 23, 1913 issue of Paper, a Weekly Illustrated Journal of Technical and Industrial Information on the Manufacture, Sale and Use of Pulp and Paper

The prevailing notion is that it was Henry Ford who gave us the five day work week.  Others say it was the labor unions.  While Ford dabbled with this idea in the 'teens, he only made this concept permanent around 1926, so perhaps John Strange merits more credit than he gets.