1820 (MDCCCXX) 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 Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.

Millennium: 2nd millennium
1820 in various calendars
Gregorian calendar1820
Ab urbe condita2573
Armenian calendar1269
Assyrian calendar6570
Balinese saka calendar1741–1742
Bengali calendar1227
Berber calendar2770
British Regnal year60 Geo. 3 – 1 Geo. 4
Buddhist calendar2364
Burmese calendar1182
Byzantine calendar7328–7329
Chinese calendar己卯年 (Earth Rabbit)
4517 or 4310
    — to —
庚辰年 (Metal Dragon)
4518 or 4311
Coptic calendar1536–1537
Discordian calendar2986
Ethiopian calendar1812–1813
Hebrew calendar5580–5581
Hindu calendars
 - Vikram Samvat1876–1877
 - Shaka Samvat1741–1742
 - Kali Yuga4920–4921
Holocene calendar11820
Igbo calendar820–821
Iranian calendar1198–1199
Islamic calendar1235–1236
Japanese calendarBunsei 3
Javanese calendar1747–1748
Julian calendarGregorian minus 12 days
Korean calendar4153
Minguo calendar92 before ROC
Nanakshahi calendar352
Thai solar calendar2362–2363
Tibetan calendar阴土兔年
(female Earth-Rabbit)
1946 or 1565 or 793
    — to —
(male Iron-Dragon)
1947 or 1566 or 794
February 6: Capture of Valdivia

Events edit

January–March edit

February 23: Cato Street Conspiracy

April–June edit

July–September edit

Chicago in 1820

October–December edit

Date unknown edit

Births edit

January–June edit

William Sherman
Susan B. Anthony
Herbert Spencer
Florence Nightingale

July–December edit

Friedrich Engels

Date unknown edit

Deaths edit

January–June edit

King George III

July–December edit

Jiaqing Emperor

References edit

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