Contents
1800
1
As of March 1 (O.S. February 18), when the Julian calendar acknowledged a leap day and the Gregorian calendar did not, the Julian calendar fell one day further behind, bringing the difference to 12 days until February 28 (O.S. February 16), 1900.
Events
January–March
April–June
July–September
October–December
World population
Births
January–June
July–December
Deaths
January–June
July–December
Date unknown
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