The calendar has 13 months each with 28 days. Every date is fixed on the same weekday, which means the 18th of each month will always fall on a Wednesday.

A 13-month calendar is not a new idea. It is simply a visual of the solar-based International Fixed calendar, or Cotsworth plan, proposed by British railway employee Moses B. Cotsworth in 1902.

You failed to point out that several calendars have 13 months, among them the Muslim and Chinese calendars, each of which is a lunar-solar calendar. Thus, 13-13-13 could be possible.

The Simpsons episode actually raises one of the downsides of the calendar. It would mean having a 13th month every year, and also means every month would contain a Friday the 13th. It may sound ...

Ethiopia follows a unique 13-month calendar known as the Ethiopian calendar or Ge'ez calendar. It differs significantly from the Gregorian calendar, with its own unique structure and cultural ...

The Ge'ez calendar has 13 months. It includes 12 months of 30 days each and an extra month called Pagumē with 5 or 6 days, depending on the year. Article continues below ADVERTISEMENT.

A proposed 13-month calendar posted Tuesday to Reddit has become the latest catnip for people on the internet. On Imgur alone, it has been viewed more than a million times and has nearly 5,700 net ...