| Centuries: | 2nd century BC - 1st century BC - 1st century |
| Decades: | 130s BC 120s BC 110s BC - 100s BC - 90s BC 80s BC 70s BC |
| Years: | 103 BC 102 BC 101 BC - 100 BC - 99 BC 98 BC 97 BC |
| 100 BC by topic | |
| Politics | |
| State leaders - Sovereign states | |
| Birth and death categories | |
| Births - Deaths | |
| Establishments and disestablishments categories | |
| - Disestablishments | |
The world in 100 BC.
The eastern hemisphere in 100 BC.
| Gregorian calendar | 100 BC |
| Ab urbe condita | 654 |
| Armenian calendar | N/A |
| Bahá'í calendar | -1943 – -1942 |
| Berber calendar | 851 |
| Buddhist calendar | 445 |
| Burmese calendar | -737 |
| Chinese calendar | 2537/2597 ([[Sexagenary cycle|]]年) — to —
2538/2598([[Sexagenary cycle|]]年) |
| Coptic calendar | -383 – -382 |
| Ethiopian calendar | -107 – -106 |
| Hebrew calendar | 3661 – 3662 |
| Hindu calendars | |
| - Vikram Samvat | -44 – -43 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 3002 – 3003 |
| Holocene calendar | 9901 |
| Iranian calendar | 721 BP – 720 BP |
| Islamic calendar | 743 BH – 742 BH |
| Japanese calendar | |
| - Imperial Year | Kōki 561 (皇紀561年) |
| Julian calendar | -54 |
| Korean calendar | 2234 |
| Thai solar calendar | 444 |
Events
By place
Rome
- Consuls: Lucius Valerius Flaccus, Gaius Marius (Marius's sixth consulship).
- Manius Aquillius celebrates an ovation for victories in the Second Servile War.
- Lucius Appuleius Saturninus, a tribune, passes a law to redistribute land to military veterans. The law requires that all senators swear to abide by it. Quintus Caecilus Metellus Numidicus refuses and is exiled. He goes to Rhodes to study philosophy.
- December: Saturninus stands for consul for the following year. A rival candidate, Gaius Memmius, is found murdered by agents of Saturninus, who is declared a public enemy by the Senate. Marius, as consul, defeats his former ally in battle in the Forum. Saturninus and his followers surrender on condition that their lives are spared, but they are stoned to death with roof tiles by renegade senators.
Anatolia
- Tigranes II of Armenia is placed on Armenian throne by the Parthians in exchange for the cession of "seventy valleys". (approximate date)
Judea
- The deuterocanonical books of 1 and 2 Maccabees were written.
Middle East
- Elephants became extinct from Middle East by this date.
Asia
- Peasant revolts under Emperor Wu of Han.
- Gandhara and Punjab ruled by the Indo-Greek king Demetrios III.
- History of China is written by Sima Qian (approximate date).
Americas
- Mural room in the Maya pyramid at San Bartolo, Guatemala, painted.
Births
- July 12 or July 13 — Julius Caesar, Roman general and politician (or 102 BC)
- Titus Labienus, Caesar's chief lieutenant in the conquest of Gaul
Deaths
- Cornelia Africana, widow of Tiberius Gracchus
- Lucius Appuleius Saturninus, Roman politician
- Theodosius of Bithynia, Greek astronomer and mathematician
