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1820 was a leap year starting on Saturday of the Gregorian calendar and a leap year starting on Thursday of the Julian calendar, the 1820th year of the Common Era (CE) and Anno Domini (AD) designations, the 820th year of the 2nd millennium, the 20th year of the 19th century, and the 1st year of the 1820s decade. As of the start of 1820, the ...
The 1820s was a decade of the Gregorian calendar that began on January 1, 1820, and ended on December 31, 1829.. It saw the rise of the First Industrial Revolution. Photography, rail transport, and the textile industry were among those that largely developed and grew prominent over the decade, as technology advanced significantly.
Colonel Rafael del Riego led a large part of the Spanish army in a mutiny, demanding that the liberal constitution of 1812 be restored. King Ferdinand VII agreed, but secretly asked for aid from the Congress system which, in the Congress of Verona of 1822, agreed to have France send 100,000 troops, which promptly defeated Riego's forces and reinstalled an absolute monarchy.
Here's the confusing part: According to the NIST, century leap years are only leap years if they can be evenly divided by 400. So, for example, 1700, 1800 and 1900 weren't leap years. And 2100?
Years divisible by 100 (century years such as 1900 or 2000) cannot be leap years unless they are also divisible by 400. (For this reason, the years 1700, 1800, and 1900 were not leap years, but ...
The rule is that if the year is divisible by 100 and not divisible by 400, the leap year is skipped. The year 2000 was a leap year, for example, but the years 1700, 1800, and 1900 were not. The ...
July 20 is the 201st day of the year (202nd in leap years) ... Finnish women are the first in Europe to receive the ... (b. 1820) [42] 1901–present. 1901 ...
The Trial of Queen Caroline by George Hayter.. 8 January – General Maritime Treaty ("General Treaty for the Cessation of Plunder and Piracy by Land and Sea, Dated February 5, 1820") signed between the sheikhs of Abu Dhabi, Sharjah, Ajman, Umm Al Quwain and Ras Al Khaimah (later constituents of the Trucial States) in the Arabian Peninsula and the United Kingdom.