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The International Fixed Calendar (also known as the Cotsworth plan, the Cotsworth calendar, the Eastman plan or the Yearal) [1] was a proposed reform of the Gregorian calendar designed by Moses B. Cotsworth, first presented in 1902. [2] The International Fixed Calendar divides the year into 13 months of 28 days each.
This is a list of calendars.Included are historical calendars as well as proposed ones. Historical calendars are often grouped into larger categories by cultural sphere or historical period; thus O'Neil (1976) distinguishes the groupings Egyptian calendars (Ancient Egypt), Babylonian calendars (Ancient Mesopotamia), Indian calendars (Hindu and Buddhist traditions of the Indian subcontinent ...
This would mean that in a leap year, 28 June on the International Fixed Calendar would correspond to 16 June on the Gregorian Calendar. Therefore the following day, Leap Day, 29 June on the International Fixed Calendar, which only occurs in leap years, must be 17 June on the Gregorian Calendar, and not 18 June as noted in the chart.
Certain calendar reforms have been labeled perpetual calendars because their dates are fixed on the same weekdays every year. Examples are The World Calendar, the International Fixed Calendar and the Pax Calendar. Technically, these are not perpetual calendars but perennial calendars. Their purpose, in part, is to eliminate the need for ...
The International Fixed Calendar is a more modern descendant of this calendar: invented by Moses B. Cotsworth and financially backed by George Eastman. [ 8 ] Around 1930, one James Colligan invented the Pax Calendar , which avoids off-calendar days by adding a 7-day leap week to the 364-day common year for 71 out of 400 years.
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Solar astronomic phenomena, such as equinoxes and solstices, vary in the Gregorian calendar over a range spanning three days, over the course of each 400-year cycle, while the ISO Week Date calendar has a range spanning 9 days. For example, there are March equinoxes on 1920-W12-6 and 2077-W11-5 in UT.
In the late 1920s and 1930s, this idea gained some momentum along with other calendar reform proposals, such as the International Fixed Calendar (IFC) and the World Calendar. In 1928, a law was passed in the United Kingdom authorising an Order in Council which would fix the date of Easter in that country as the Sunday after the second Saturday ...