1840

1840 in other calendars
Gregorian calendar	1840; MDCCCXL
Ab urbe condita	2593
Armenian calendar	1289; ԹՎ ՌՄՁԹ
Assyrian calendar	6590
Balinese saka calendar	1761–1762
Bengali calendar	1247
Berber calendar	2790
British Regnal year	3 Vict. 1 – 4 Vict. 1
Buddhist calendar	2384
Burmese calendar	1202
Byzantine calendar	7348–7349
Chinese calendar	己亥年 (Earth Pig); 4536 or 4476; — to —; 庚子年 (Metal Rat); 4537 or 4477
Coptic calendar	1556–1557
Discordian calendar	3006
Ethiopian calendar	1832–1833
Hebrew calendar	5600–5601
Hindu calendars
- Vikram Samvat	1896–1897
- Shaka Samvat	1761–1762
- Kali Yuga	4940–4941
Holocene calendar	11840
Igbo calendar	840–841
Iranian calendar	1218–1219
Islamic calendar	1255–1256
Japanese calendar	Tenpō 11; (天保１１年)
Javanese calendar	1767–1768
Julian calendar	Gregorian minus 12 days
Korean calendar	4173
Minguo calendar	72 before ROC; 民前72年
Nanakshahi calendar	372
Thai solar calendar	2382–2383
Tibetan calendar	阴土猪年; (female Earth-Pig); 1966 or 1585 or 813; — to —; 阳金鼠年; (male Iron-Rat); 1967 or 1586 or 814

Millennium:	2nd millennium
Centuries:	18th century – 19th century – 20th century
Decades:	1810s 1820s 1830s – 1840s – 1850s 1860s 1870s
Years:	1837 1838 1839 – 1840 – 1841 1842 1843

1840 (MDCCCXL) was a leap year starting on Wednesday of the Gregorian calendar and a leap year starting on Monday of the Julian calendar, the 1840th year of the Common Era (CE) and Anno Domini (AD) designations, the 840th year of the 2nd millennium, the 40th year of the 19th century, and the 1st year of the 1840s decade. As of the start of 1840, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.

Events

The Great Natchez Tornado: A massive tornado hits Natchez, Mississippi. Before it was over, 317 people had died and 209 were injured.