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Millennium: 2nt millennium
Centuries: 18t century19t century20t century
Decades: 1770s  1780s  1790s  – 1800s –  1810s  1820s  1830s
Years: 1801 1802 180318041805 1806 1807

1804 (MDCCCIV) wis a leap year stairtin on Sunday o the Gregorian calendar (dominical letter AG), the 1804t year o the Common Era (CE) an Anno Domini (AD) designations, the 804t year o the 2nt millennium, the 4t year o the 19t century, an the 5t year o the 1800s decade atween 1583 an 1929 an wi Julian Value: 1804 is 12 calendar days difference, which continued tae be uised till the complete conversion o the Gregorian calendar wis entirely duin in 1929.