Kodak 13 Month Calendar

Kodak 13 Month Calendar. In the international fixed calendar, there are 13 months, which each have 28 days. Cotsworth in 1902, is called the “international fixed calendar“.

The eastman kodak company adopted the 13 month calendar in 1924 and they continued to use it until 1989. In the international fixed calendar, that’s exactly what was proposed in the 1920s.