491 (CDXCI) was a common year starting on Tuesday of the Julian calendar, the 491st year of the Common Era (CE) and Anno Domini (AD) designations, the 491st year of the 1st millennium, the 91st year of the 5th century, and the 2nd year of the 490s decade. As of the start of 491, the Gregorian calendar was 1 day ahead of the Julian calendar, which was the dominant calendar of the time.

Millennium: 1st millennium
Centuries: 4th century5th century6th century
Decades: 460s  470s  480s  – 490s –  500s  510s  520s
Years: 488 489 490491492 493 494
491 in other calendars
Gregorian calendar491
CDXCI
Ab urbe condita1244
Assyrian calendar5241
Balinese saka calendar412–413
Bengali calendar−102
Berber calendar1441
Buddhist calendar1035
Burmese calendar−147
Byzantine calendar5999–6000
Chinese calendar庚午(Metal Horse)
3187 or 3127
    — to —
辛未年 (Metal Goat)
3188 or 3128
Coptic calendar207–208
Discordian calendar1657
Ethiopian calendar483–484
Hebrew calendar4251–4252
Hindu calendars
 - Vikram Samvat547–548
 - Shaka Samvat412–413
 - Kali Yuga3591–3592
Holocene calendar10491
Iranian calendar131 BP – 130 BP
Islamic calendar135 BH – 134 BH
Javanese calendar377–378
Julian calendar491
CDXCI
Korean calendar2824
Minguo calendar1421 before ROC
民前1421年
Nanakshahi calendar−977
Seleucid era802/803 AG
Thai solar calendar1033–1034
Tibetan calendar阳金马年
(male Iron-Horse)
617 or 236 or −536
    — to —
阴金羊年
(female Iron-Goat)
618 or 237 or −535

Deaths

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