Was There Ever a 13-Month Calendar? Discover the International Fixed Calendar

Explore the history of the 13-month International Fixed Calendar used by Eastman Kodak and its unique design with 28-day months.

85 views

Yes, there has been a 13-month calendar. The International Fixed Calendar, also known as the Positivist or Cotsworth Plan, included 13 months of 28 days each with an extra 'Year Day' at the end of each year. Though it was never widely adopted, it was used by Eastman Kodak from 1928 to 1989 for internal purposes.

FAQs & Answers

  1. What is the International Fixed Calendar? The International Fixed Calendar is a 13-month calendar system with 28 days per month and an additional 'Year Day' to maintain alignment with the solar year.
  2. Who used the 13-month calendar system historically? Eastman Kodak used the International Fixed Calendar internally from 1928 to 1989, although it was never widely adopted elsewhere.
  3. Why does the 13-month calendar have 28 days per month? Each month in the 13-month calendar has 28 days to create uniformity, making each month exactly four weeks long.
  4. What were the other names for the 13-month calendar? The 13-month calendar was also known as the Positivist calendar and the Cotsworth Plan.

Watch More

If you found the International Fixed Calendar intriguing, explore more about alternative calendar systems and their impacts on business and culture. Check out our videos on the Gregorian calendar history and other calendar reform proposals for a deeper understanding.

  1. Exploring the Concept of 13 Months in a Year Learn about historical calendars with 13 months, like the Ethiopian calendar, and how cultural perceptions of time vary.
  2. Did Humans Ever Have 13 Months in a Year? Exploring Historical Calendars Discover the history of 13-month calendars, including the French Revolutionary Calendar, and why the Gregorian calendar has 12 months.
  3. Should the Calendar Have 13 Months Instead of 12? Explore the pros and cons of switching to a 13-month calendar with 28 days each and its impact on modern systems and traditions.
  4. Why is There No 13-Month Calendar? Understanding the Gregorian System Explore why the 12-month Gregorian calendar prevails and the implications of a 13-month system.
  5. Why Don’t We Use a 13-Month Calendar? Explained Discover why the world uses a 12-month calendar instead of 13 months, focusing on practical, agricultural, and historical reasons.