International Fixed Calendar now has an Apple TV companion app! On Apple TV the app will display the current date on the international fixed calendar. Please also check International Fixed Calendar on Apple Watch for the included Apple Watch complication and also on your iPhone to check past and future dates.
The International Fixed Calendar was a planned calendar reform which added a new month, Sol, between June and July. The International Fixed Calendar therefore had 13 equal months fixed in size with 28 days each. The calendar system brought a number of great benefits, but humanity decided it would be a better idea to have another giant war instead so the plans were shelved. Good job humanity!
Despite this the Kodak company used the calendar internally between 1928 and 1989. If you're a time traveling Kodak employee who owns an Apple TV then this is the app for you!