| Centuries: | 2nd century BC - 1st century BC - 1st century |
| Decades: | 120s BC 110s BC 100s BC - 90s BC - 80s BC 70s BC 60s BC |
| Years: | 94 BC 93 BC 92 BC - 91 BC - 90 BC 89 BC 88 BC |
| 91 BC by topic | |
| Politics | |
| State leaders - Sovereign states | |
| Birth and death categories | |
| Births - Deaths | |
| Establishments and disestablishments categories | |
| - | |
| Gregorian calendar | 91 BC |
| Ab urbe condita | 663 |
| Armenian calendar | N/A |
| Bahá'í calendar | -1934 – -1933 |
| Berber calendar | 860 |
| Buddhist calendar | 454 |
| Burmese calendar | -728 |
| Chinese calendar | 2546/2606 ([[Sexagenary cycle|]]年) — to —
2547/2607([[Sexagenary cycle|]]年) |
| Coptic calendar | -374 – -373 |
| Ethiopian calendar | -98 – -97 |
| Hebrew calendar | 3670 – 3671 |
| Hindu calendars | |
| - Vikram Samvat | -35 – -34 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 3011 – 3012 |
| Holocene calendar | 9910 |
| Iranian calendar | 712 BP – 711 BP |
| Islamic calendar | 734 BH – 733 BH |
| Japanese calendar | |
| - Imperial Year | Kōki 570 (皇紀570年) |
| Julian calendar | -45 |
| Korean calendar | 2243 |
| Thai solar calendar | 453 |
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
Deaths
- Nicomedes II, king of Bithynia
- Marcus Livius Drusus, murdered
- Lucius Licinius Crassus, Roman consul and orator
- Liu Ju, crown prince of the Han Dynasty, suicide
- Empress Wei Zifu
