804

Millennium: 1st millennium
Centuries:
Decades:
Years:
804 in various calendars
Gregorian calendar804
DCCCIV
Ab urbe condita1557
Armenian calendar253
ԹՎ ՄԾԳ
Assyrian calendar5554
Balinese saka calendar725–726
Bengali calendar211
Berber calendar1754
Buddhist calendar1348
Burmese calendar166
Byzantine calendar6312–6313
Chinese calendar癸未年 (Water Goat)
3501 or 3294
    — to —
甲申年 (Wood Monkey)
3502 or 3295
Coptic calendar520–521
Discordian calendar1970
Ethiopian calendar796–797
Hebrew calendar4564–4565
Hindu calendars
 - Vikram Samvat860–861
 - Shaka Samvat725–726
 - Kali Yuga3904–3905
Holocene calendar10804
Iranian calendar182–183
Islamic calendar188–189
Japanese calendarEnryaku 23
(延暦23年)
Javanese calendar699–700
Julian calendar804
DCCCIV
Korean calendar3137
Minguo calendar1108 before ROC
民前1108年
Nanakshahi calendar−664
Seleucid era1115/1116 AG
Thai solar calendar1346–1347
Tibetan calendar阴水羊年
(female Water-Goat)
930 or 549 or −223
    — to —
阳木猴年
(male Wood-Monkey)
931 or 550 or −222
The Gymnasium Carolinum in Osnabrück

Year 804 (DCCCIV) was a leap year starting on Monday (link will display the full calendar) of the Julian calendar.