> By 1928, Eastman had already implemented the IFC internally at Kodak and was spending his own money to persuade the rest of the world to follow suit. Soon 140

> By 1928, Eastman had already implemented the IFC internally at Kodak and was spending his own money to persuade the rest of the world to follow suit. Soon 140 American companies joined him, maintaining a 13-month calendar for their businesses and wagering that calendar reform would continue to gain traction. I've seen this repeated before, but never with any details or attribution. Did Kodak really use this 13 month calendar? What about the 140 other companies? If it was really so popular, I would have expected it to leave more of a mark.