491

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 century – 5th century – 6th century
Decades:	460s  470s  480s  – 490s –  500s  510s  520s
Years:	488 489 490 – 491 – 492 493 494

491 in other calendars

Gregorian calendar	491 CDXCI
Ab urbe condita	1244
Assyrian calendar	5241
Balinese saka calendar	412–413
Bengali calendar	−102
Berber calendar	1441
Buddhist calendar	1035
Burmese calendar	−147
Byzantine calendar	5999–6000
Chinese calendar	庚午年 (Metal Horse) 3187 or 3127     — to — 辛未年 (Metal Goat) 3188 or 3128
Coptic calendar	207–208
Discordian calendar	1657
Ethiopian calendar	483–484
Hebrew calendar	4251–4252
Hindu calendars
- Vikram Samvat	547–548
- Shaka Samvat	412–413
- Kali Yuga	3591–3592
Holocene calendar	10491
Iranian calendar	131 BP – 130 BP
Islamic calendar	135 BH – 134 BH
Javanese calendar	377–378
Julian calendar	491 CDXCI
Korean calendar	2824
Minguo calendar	1421 before ROC 民前1421年
Nanakshahi calendar	−977
Seleucid era	802/803 AG
Thai solar calendar	1033–1034
Tibetan calendar	ལྕགས་ཕོ་རྟ་ལོ་ (male Iron-Horse) 617 or 236 or −536     — to — ལྕགས་མོ་ལུག་ལོ་ (female Iron-Sheep) 618 or 237 or −535

Deaths

• March 17 – Saint Patrick, patron saint of Ireland (possibly died this year, could also have died in the year 493)