843 (DCCCXLIII) was a common year starting on Monday of the Julian calendar, the 843rd year of the Common Era (CE) and Anno Domini (AD) designations, the 843rd year of the 1st millennium, the 43rd year of the 9th century, and the 4th year of the 840s decade. As of the start of 843, the Gregorian calendar was 4 days ahead of the Julian calendar, which was the dominant calendar of the time.

Millennium: 1st millennium
Centuries: 8th century9th century10th century
Decades: 810s  820s  830s  – 840s –  850s  860s  870s
Years: 840 841 842843844 845 846
843 in other calendars
Gregorian calendar843
DCCCXLIII
Ab urbe condita1596
Armenian calendar292
ԹՎ ՄՂԲ
Assyrian calendar5593
Balinese saka calendar764–765
Bengali calendar250
Berber calendar1793
Buddhist calendar1387
Burmese calendar205
Byzantine calendar6351–6352
Chinese calendar壬戌(Water Dog)
3539 or 3479
    — to —
癸亥年 (Water Pig)
3540 or 3480
Coptic calendar559–560
Discordian calendar2009
Ethiopian calendar835–836
Hebrew calendar4603–4604
Hindu calendars
 - Vikram Samvat899–900
 - Shaka Samvat764–765
 - Kali Yuga3943–3944
Holocene calendar10843
Iranian calendar221–222
Islamic calendar228–229
Japanese calendarJōwa 10
(承和10年)
Javanese calendar740–741
Julian calendar843
DCCCXLIII
Korean calendar3176
Minguo calendar1069 before ROC
民前1069年
Nanakshahi calendar−625
Seleucid era1154/1155 AG
Thai solar calendar1385–1386
Tibetan calendar阳水狗年
(male Water-Dog)
969 or 588 or −184
    — to —
阴水猪年
(female Water-Pig)
970 or 589 or −183

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