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The year 46 BCE was the longest year in history, at 445 days. |
World History |
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| When Julius Caesar became dictator of Rome in 49 BCE, he decided a change was in order, both to limit the pontifices' power and to create a more effective calendar for administering a growing empire. With the help of Greek astronomer Sosigenes of Alexandria, Caesar instituted the eponymous Julian calendar on January 1, 45 BCE. But to make the switch to the new calendar, Romans had to withstand what's now known as the "last year of confusion." At this point, Rome's calendar was roughly three months out of whack with the seasonal harvest festivals, so Caesar inserted three extra months into the year 46 BCE, known as "intercalary months," to get his 365-day calendar realigned with the solar year. For those living within Rome's borders, 46 BCE — at 445 days long — became the longest year in history. | |
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The year 1752 was the shortest year in American history. | |||||||||
| The Julian calendar was a major mathematical improvement over its predecessor, but it was still 11 minutes and 14 seconds behind the solar year. This small error grew bigger with each passing year, and the calendar was a full 10 days behind by the 16th century. In 1582, Pope Gregory XIII, with the aid of Italian astronomer Aloysius Lilius, instituted the modern Gregorian calendar to correct this. But because of religious differences between Catholic Rome and Protestant Britain, the British Empire — which included the American colonies at the time — didn't make the switch until the mid-18th century, mostly at the insistence of British astronomers. At that point, the year 1752 jumped from September 2 to September 14, making it only 355 days long and the shortest year in U.S. history. Although the empire lost 11 days, the change brought about the modern calendar that is still in use today. | |||||||||
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