A downloadable tool for Windows

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How many days hath this month?


A minimal calendar application based on the 13-month year.

  • Every month has 28 days
  • Every month starts on a Sunday and ends on a Saturday
  • Day 365 is "intermission" on the last day of the year
  • Leap years get a second "intermission" day!
  • Month names moved to represent their root 'Dec-ember' = 10th
  • Includes a Gregorian date lookup
  • Copy Cal13 date to your clipboard by clicking on the date



💡 Did you Know? 

>>  The US congress almost accepted a 13 month calendar:
https://history.house.gov/Blog/2020/February/2-28-Liberty-Calendar/



â–¶ Video summary by Dave Gorman:




You can customize the names for Intermissions and the 13th month ('Solstember' by default) by editing the ini file found in your data folder after launch: 

...\AppData\Local\Cal13\cm13_config.ini




This application is functional but is still in development. Some planned features for the final build include:

  • Browsing the calendar in 'Cal13' view
  • Yearly view
  • Optional background art


Download

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Click download now to get access to the following files:

Cal13 v0-1 windows.zip 3 MB

Development log

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