90 BC

90 BC in various calendars
Gregorian calendar	90 BC; XC BC
Ab urbe condita	664
Ancient Egypt era	XXXIII dynasty, 234
- Pharaoh	Ptolemy X Alexander, 18
Ancient Greek era	172nd Olympiad, year 3
Assyrian calendar	4661
Balinese saka calendar	N/A
Bengali calendar	−682
Berber calendar	861
Buddhist calendar	455
Burmese calendar	−727
Byzantine calendar	5419–5420
Chinese calendar	庚寅年 (Metal Tiger); 2608 or 2401; — to —; 辛卯年 (Metal Rabbit); 2609 or 2402
Coptic calendar	−373 – −372
Discordian calendar	1077
Ethiopian calendar	−97 – −96
Hebrew calendar	3671–3672
Hindu calendars
- Vikram Samvat	−33 – −32
- Shaka Samvat	N/A
- Kali Yuga	3011–3012
Holocene calendar	9911
Iranian calendar	711 BP – 710 BP
Islamic calendar	733 BH – 732 BH
Javanese calendar	N/A
Julian calendar	N/A
Korean calendar	2244
Minguo calendar	2001 before ROC; 民前2001年
Nanakshahi calendar	−1557
Seleucid era	222/223 AG
Thai solar calendar	453–454
Tibetan calendar	阳金虎年; (male Iron-Tiger); 37 or −344 or −1116; — to —; 阴金兔年; (female Iron-Rabbit); 38 or −343 or −1115

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:	93 BC; 92 BC; 91 BC; 90 BC ; 89 BC; 88 BC; 87 BC;

Year 90 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Caesar and Lupus (or, less frequently, year 664 Ab urbe condita) and the Third Year of Zhenghe. The denomination 90 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	90 BC XC BC
Ab urbe condita	664
Ancient Egypt era	XXXIII dynasty, 234
- Pharaoh	Ptolemy X Alexander, 18
Ancient Greek era	172nd Olympiad, year 3
Assyrian calendar	4661
Balinese saka calendar	N/A
Bengali calendar	−682
Berber calendar	861
Buddhist calendar	455
Burmese calendar	−727
Byzantine calendar	5419–5420
Chinese calendar	庚寅年 (Metal Tiger) 2608 or 2401 — to — 辛卯年 (Metal Rabbit) 2609 or 2402
Coptic calendar	−373 – −372
Discordian calendar	1077
Ethiopian calendar	−97 – −96
Hebrew calendar	3671–3672
Hindu calendars
- Vikram Samvat	−33 – −32
- Shaka Samvat	N/A
- Kali Yuga	3011–3012
Holocene calendar	9911
Iranian calendar	711 BP – 710 BP
Islamic calendar	733 BH – 732 BH
Javanese calendar	N/A
Julian calendar	N/A
Korean calendar	2244
Minguo calendar	2001 before ROC 民前2001年
Nanakshahi calendar	−1557
Seleucid era	222/223 AG
Thai solar calendar	453–454
Tibetan calendar	阳金虎年 (male Iron-Tiger) 37 or −344 or −1116 — to — 阴金兔年 (female Iron-Rabbit) 38 or −343 or −1115