91 BC

250 BC in various calendars

Gregorian calendar	250 BC CCL BC
Ab urbe condita	504
Ancient Egypt era	XXXIII dynasty, 74
- Pharaoh	Ptolemy II Philadelphus, 34
Ancient Greek era	132nd Olympiad, year 3
Assyrian calendar	4501
Balinese saka calendar	N/A
Bengali calendar	−842
Berber calendar	701
Buddhist calendar	295
Burmese calendar	−887
Byzantine calendar	5259–5260
Chinese calendar	庚戌年 (Metal Dog) 2448 or 2241     — to — 辛亥年 (Metal Pig) 2449 or 2242
Coptic calendar	−533 – −532
Discordian calendar	917
Ethiopian calendar	−257 – −256
Hebrew calendar	3511–3512
Hindu calendars
- Vikram Samvat	−193 – −192
- Shaka Samvat	N/A
- Kali Yuga	2851–2852
Holocene calendar	9751
Iranian calendar	871 BP – 870 BP
Islamic calendar	898 BH – 897 BH
Javanese calendar	N/A
Julian calendar	N/A
Korean calendar	2084
Minguo calendar	2161 before ROC 民前2161年
Nanakshahi calendar	−1717
Seleucid era	62/63 AG
Thai solar calendar	293–294
Tibetan calendar	阳金狗年 (male Iron-Dog) −123 or −504 or −1276     — to — 阴金猪年 (female Iron-Pig) −122 or −503 or −1275

91 BC in various calendars

Gregorian calendar	91 BC XCI BC
Ab urbe condita	663
Ancient Egypt era	XXXIII dynasty, 233
- Pharaoh	Ptolemy X Alexander, 17
Ancient Greek era	172nd Olympiad, year 2
Assyrian calendar	4660
Balinese saka calendar	N/A
Bengali calendar	−683
Berber calendar	860
Buddhist calendar	454
Burmese calendar	−728
Byzantine calendar	5418–5419
Chinese calendar	己丑年 (Earth Ox) 2607 or 2400     — to — 庚寅年 (Metal Tiger) 2608 or 2401
Coptic calendar	−374 – −373
Discordian calendar	1076
Ethiopian calendar	−98 – −97
Hebrew calendar	3670–3671
Hindu calendars
- Vikram Samvat	−34 – −33
- Shaka Samvat	N/A
- Kali Yuga	3010–3011
Holocene calendar	9910
Iranian calendar	712 BP – 711 BP
Islamic calendar	734 BH – 733 BH
Javanese calendar	N/A
Julian calendar	N/A
Korean calendar	2243
Minguo calendar	2002 before ROC 民前2002年
Nanakshahi calendar	−1558
Seleucid era	221/222 AG
Thai solar calendar	452–453
Tibetan calendar	阴土牛年 (female Earth-Ox) 36 or −345 or −1117     — to — 阳金虎年 (male Iron-Tiger) 37 or −344 or −1116

Year 91 BC was a year of the pre-Julian calendar.

Events

By place

Rome

• Consuls: Sextus Julius Caesar and Lucius Marcius Philippus
• The tribune Marcus Livius Drusus proposes extending Roman citizenship to allied Italian cities, but is assassinated, leading to the Social War.

Asia

• Liu Ju, crown prince of the Han Dynasty, revolts against his father, Emperor Wu, and his witchcraft trials. After his rebellion fails, he hangs himself.
• Records of the Grand Historian compiled by Sima Qian.

Births

• Emperor Xuan of Han (d. 49 BC)

Deaths

• Nicomedes II, king of Bithynia
• Marcus Livius Drusus, murdered
• Lucius Licinius Crassus, Roman consul and orator (b. 140 BC)
• Liu Ju, crown prince of the Han Dynasty, suicide (b. 128 BC)
• Empress Wei Zifu