90 BC

Millennium: 1st millennium BC
Centuries:
Decades:
Years:
90 BC in various calendars
Gregorian calendar90 BC
XC BC
Ab urbe condita664
Ancient Egypt eraXXXIII dynasty, 234
- PharaohPtolemy X Alexander, 18
Ancient Greek era172nd Olympiad, year 3
Assyrian calendar4661
Balinese saka calendarN/A
Bengali calendar−682
Berber calendar861
Buddhist calendar455
Burmese calendar−727
Byzantine calendar5419–5420
Chinese calendar庚寅年 (Metal Tiger)
2608 or 2401
    — to —
辛卯年 (Metal Rabbit)
2609 or 2402
Coptic calendar−373 – −372
Discordian calendar1077
Ethiopian calendar−97 – −96
Hebrew calendar3671–3672
Hindu calendars
 - Vikram Samvat−33 – −32
 - Shaka SamvatN/A
 - Kali Yuga3011–3012
Holocene calendar9911
Iranian calendar711 BP – 710 BP
Islamic calendar733 BH – 732 BH
Javanese calendarN/A
Julian calendarN/A
Korean calendar2244
Minguo calendar2001 before ROC
民前2001年
Nanakshahi calendar−1557
Seleucid era222/223 AG
Thai solar calendar453–454
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

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.