October Anniversaries- page 2 | History | Smithsonian

October Anniversaries

Momentous or merely memorable

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425 YEARS AGO: How Time Flies

Ten days are eliminated when a new calendar goes into effect in Spain, Portugal and Italy in October 1582. Designed by Aloysius Lilius and mandated by Pope Gregory XIII to restore the vernal equinox—and thus Easter—to a date chosen centuries earlier, the new Gregorian calendar—as it becomes known—replaces the Julian calendar. By the time England and its colonies go Gregorian, in 1752, another day must be consigned to history's dustbin.

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