In 1923, Milutin Milanković proposed to a synod of some Eastern Orthodox Churches at Constantinople that only those centennial years (those ending in '00) that leave a remainder of 200 or 600 upon division by 900 would be leap years, decreasing the average year length to 365.242222 days.
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The World Calendar is a proposed reform of the Gregorian calendar created by Elisabeth Achelis of Brooklyn, New York in 1930.
The calendar reform after the Second Vatican Council transferred the feast to January 10, the date of his death.