1805

Millennium: 2nd millennium
Centuries:
Decades:
Years:
1805 in various calendars
Gregorian calendar1805
MDCCCV
French Republican calendar13–14
Ab urbe condita2558
Armenian calendar1254
ԹՎ ՌՄԾԴ
Assyrian calendar6555
Balinese saka calendar1726–1727
Bengali calendar1212
Berber calendar2755
British Regnal year45 Geo. 3 – 46 Geo. 3
Buddhist calendar2349
Burmese calendar1167
Byzantine calendar7313–7314
Chinese calendar甲子年 (Wood Rat)
4502 or 4295
    — to —
乙丑年 (Wood Ox)
4503 or 4296
Coptic calendar1521–1522
Discordian calendar2971
Ethiopian calendar1797–1798
Hebrew calendar5565–5566
Hindu calendars
 - Vikram Samvat1861–1862
 - Shaka Samvat1726–1727
 - Kali Yuga4905–4906
Holocene calendar11805
Igbo calendar805–806
Iranian calendar1183–1184
Islamic calendar1219–1220
Japanese calendarBunka 2
(文化2年)
Javanese calendar1731–1732
Julian calendarGregorian minus 12 days
Korean calendar4138
Minguo calendar107 before ROC
民前107年
Nanakshahi calendar337
Thai solar calendar2347–2348
Tibetan calendar阳木鼠年
(male Wood-Rat)
1931 or 1550 or 778
    — to —
阴木牛年
(female Wood-Ox)
1932 or 1551 or 779
October 21: Battle of Trafalgar

1805 (MDCCCV) was a common year starting on Tuesday of the Gregorian calendar and a common year starting on Sunday of the Julian calendar, the 1805th year of the Common Era (CE) and Anno Domini (AD) designations, the 805th year of the 2nd millennium, the 5th year of the 19th century, and the 6th year of the 1800s decade. As of the start of 1805, the Gregorian calendar was 12 days ahead of the Julian calendar, which remained in localized use until 1923.

After thirteen years the First French Empire abolished the French Republican Calendar in favour of the Gregorian calendar.