The first shots of the American Civil War were fired at Fort Sumter on December 26, 1860. The fort was not yet fully constructed, and the Union commander had moved his forces there without orders from Washington because he thought reinforcing it might delay a Confederate attack.
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1 January : the first day of the year in the Gregorian calendar used by most developed countries.
The Gregorian calendar is the calendar that is used nearly everywhere in the world. A modification of the Julian calendar, it was first proposed by the Neapolitan doctor Aloysius Lilius, and was decreed by Pope Gregory XIII, for whom it was named, on 24 February 1582 (Note: The papal bull Inter gravissimas was signed in the year 1581 for unknown reasons, but printed on 1 March 1582. Although the use of the date 1581 is often attributed to the supposed adoption by the papacy of a reckoning by which the year began on 25 March, other contemporaneous papal bulls have years that do not agree with March years, let alone years since a pope was named or other types of years.)
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