491 BC

491 BC in various calendars
Gregorian calendar	491 BC; CDXCI BC
Ab urbe condita	263
Ancient Egypt era	XXVII dynasty, 35
- Pharaoh	Darius I of Persia, 31
Ancient Greek era	72nd Olympiad, year 2
Assyrian calendar	4260
Balinese saka calendar	N/A
Bengali calendar	−1083
Berber calendar	460
Buddhist calendar	54
Burmese calendar	−1128
Byzantine calendar	5018–5019
Chinese calendar	己酉年 (Earth Rooster); 2207 or 2000; — to —; 庚戌年 (Metal Dog); 2208 or 2001
Coptic calendar	−774 – −773
Discordian calendar	676
Ethiopian calendar	−498 – −497
Hebrew calendar	3270–3271
Hindu calendars
- Vikram Samvat	−434 – −433
- Shaka Samvat	N/A
- Kali Yuga	2610–2611
Holocene calendar	9510
Iranian calendar	1112 BP – 1111 BP
Islamic calendar	1146 BH – 1145 BH
Javanese calendar	N/A
Julian calendar	N/A
Korean calendar	1843
Minguo calendar	2402 before ROC; 民前2402年
Nanakshahi calendar	−1958
Thai solar calendar	52–53
Tibetan calendar	阴土鸡年; (female Earth-Rooster); −364 or −745 or −1517; — to —; 阳金狗年; (male Iron-Dog); −363 or −744 or −1516

Millennium:	1st millennium BC
Centuries:	6th century BC; 5th century BC ; 4th century BC;
Decades:	510s BC; 500s BC; 490s BC ; 480s BC; 470s BC;
Years:	494 BC; 493 BC; 492 BC; 491 BC ; 490 BC; 489 BC; 488 BC;

Year 491 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Consulship of Augurinus and Atratinus (or, less frequently, year 263 Ab urbe condita). The denomination 491 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

Gregorian calendar	491 BC CDXCI BC
Ab urbe condita	263
Ancient Egypt era	XXVII dynasty, 35
- Pharaoh	Darius I of Persia, 31
Ancient Greek era	72nd Olympiad, year 2
Assyrian calendar	4260
Balinese saka calendar	N/A
Bengali calendar	−1083
Berber calendar	460
Buddhist calendar	54
Burmese calendar	−1128
Byzantine calendar	5018–5019
Chinese calendar	己酉年 (Earth Rooster) 2207 or 2000 — to — 庚戌年 (Metal Dog) 2208 or 2001
Coptic calendar	−774 – −773
Discordian calendar	676
Ethiopian calendar	−498 – −497
Hebrew calendar	3270–3271
Hindu calendars
- Vikram Samvat	−434 – −433
- Shaka Samvat	N/A
- Kali Yuga	2610–2611
Holocene calendar	9510
Iranian calendar	1112 BP – 1111 BP
Islamic calendar	1146 BH – 1145 BH
Javanese calendar	N/A
Julian calendar	N/A
Korean calendar	1843
Minguo calendar	2402 before ROC 民前2402年
Nanakshahi calendar	−1958
Thai solar calendar	52–53
Tibetan calendar	阴土鸡年 (female Earth-Rooster) −364 or −745 or −1517 — to — 阳金狗年 (male Iron-Dog) −363 or −744 or −1516