1804

1804 (MDCCCIV) was a leap year starting on Sunday in the Gregorian calendar and a leap year starting on Friday in the Julian calendar.

Millennium:	2nd millennium
Centuries:	18th century – 19th century – 20th century
Decades:	1770s  1780s  1790s  – 1800s –  1810s  1820s  1830s
Years:	1801 1802 1803 – 1804 – 1805 1806 1807

1804 in other calendars

Gregorian calendar	1804 MDCCCIV
French Republican calendar	12–13
Ab urbe condita	2557
Armenian calendar	1253 ԹՎ ՌՄԾԳ
Assyrian calendar	6554
Balinese saka calendar	1725–1726
Bengali calendar	1211
Berber calendar	2754
British Regnal year	44 Geo. 3 – 45 Geo. 3
Buddhist calendar	2348
Burmese calendar	1166
Byzantine calendar	7312–7313
Chinese calendar	癸亥年 (Water Pig) 4500 or 4440     — to — 甲子年 (Wood Rat) 4501 or 4441
Coptic calendar	1520–1521
Discordian calendar	2970
Ethiopian calendar	1796–1797
Hebrew calendar	5564–5565
Hindu calendars
- Vikram Samvat	1860–1861
- Shaka Samvat	1725–1726
- Kali Yuga	4904–4905
Holocene calendar	11804
Igbo calendar	804–805
Iranian calendar	1182–1183
Islamic calendar	1218–1219
Japanese calendar	Kyōwa 3 / Bunka 1 (文化元年)
Javanese calendar	1730–1731
Julian calendar	Gregorian minus 12 days
Korean calendar	4137
Minguo calendar	108 before ROC 民前108年
Nanakshahi calendar	336
Thai solar calendar	2346–2347
Tibetan calendar	ཆུ་མོ་ཕག་ལོ་ (female Water-Boar) 1930 or 1549 or 777     — to — ཤིང་ཕོ་བྱི་བ་ལོ་ (male Wood-Rat) 1931 or 1550 or 778

Births

• July 4 – Nathaniel Hawthorne, American writer (The Scarlet Letter, The House of the Seven Gables, etc.)
• November 23 - Franklin Pierce, fourteenth President of the United States (d. 1869)

Deaths

• February 12 – Immanuel Kant
• July 12 – Alexander Hamilton, 49 (b. 1755)