The Death and Life of the 13-Month Calendar - CityLab
▻http://www.citylab.com/work/2014/12/the-world-almost-had-a-13-month-calendar/383610
The 13-month calendar worked so well at Kodak that the company used it until 1989, 57 years after Eastman committed suicide (a businessman to the end, his ashes are buried at Kodak’s old industrial complex). “I loved it,” says John Cirocco, a former Kodak employee who worked at the company in the late ’80s as a tech advisor. “It was a major piece of financial applications, and from a financial perspective it made the ability to compare sales periods a hell of a lot easier.”