91 BC

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

Millennium:	1st millennium BC
Centuries:	2nd century BC; 1st century BC ; 1st century;
Decades:	110s BC; 100s BC; 90s BC ; 80s BC; 70s BC;
Years:	94 BC; 93 BC; 92 BC; 91 BC ; 90 BC; 89 BC; 88 BC;

Year 91 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Philippus and Caesar (or, less frequently, year 663 Ab urbe condita) and the Second Year of Zhenghe. The denomination 91 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	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

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91 BC

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