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Concept

World Calendar

A conceptual illustration of a world calendar featuring concentric circles with numbers and a central globe, symbolizing a proposed reform from the 1930s by Elisabeth Achelis to divide the year into four equal quarters of 91 days each.

A proposed reform promoted from the 1930s by the American philanthropist Elisabeth Achelis and her World Calendar Association. It would divide the year into four identical quarters of 91 days plus a year-end Worldsday outside any week, so every date would fall on the same weekday forever. The United Nations considered it seriously in the 1950s. Objections from Jewish and Sabbatarian groups, who hold the seven-day cycle inviolable, sank the proposal.

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