Invented Reckonings
The World Calendar
Four equal quarters · nearly adopted by the League of Nations
Elisabeth Achelis’s 1930 reform: four identical quarters of 91 days (31, 30, 30), each opening on a Sunday, so every quarter of every year is the same shape. A Worldsday closes the year outside the weekly cycle. It reached the floor of the League of Nations and was still being debated at the UN in 1955 before stalling over that week-breaking extra day.
—
In UTC at 02:02 on October 27, 2026, this calendar read 27 October 2026. The reading above is live, in your own time zone.
At a glance
- Type
- Solar — four identical quarters
- Origin
- Elisabeth Achelis, 1930
- Year
- 364 days in four quarters, plus Worldsday — and Leapyear Day in leap years
- Months
- 12, in quarters of 31, 30 and 30 days
- Week
- 7 days; every quarter opens on a Sunday
- Leap rule
- Leapyear Day after 30 June, outside the week
- Counts from
- The Gregorian era
- Where it’s used
- A proposal; debated at the League of Nations and the UN, never adopted
- How it’s worked out here
- From the Gregorian date, day by day
Does something here look wrong? Tell us about the The World Calendar calendar.