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Gregorian calendar

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1582 · Rome · Europe · Science

Ten days vanish from the calendar most of the world now uses

Gregorian calendar
Karl Nimtsch · CC BY-SA 3.0 · Wikimedia Commons

In 1582 Pope Gregory XIII introduced a new calendar: Thursday 4 October was followed directly by Friday 15 October. Protestant countries adopted it gradually, and Russia only in 1918.

State: Papal States

Did you know

In autumn 1582 Catholic Europe jumped from 4 to 15 October, while Yermak’s Cossacks were marching on the capital of the Khanate of Sibir. Russia adopted the new calendar only in 1918.

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Alive at the time