| Centuries: | 3rd century BC - 2nd century BC - 1st century BC |
| Decades: | 150s BC 140s BC 130s BC - 120s BC - 110s BC 100s BC 90s BC |
| Years: | 128 BC 127 BC 126 BC - 125 BC - 124 BC 123 BC 122 BC |
| 125 BC by topic | |
| Politics | |
| State leaders - Sovereign states | |
| Birth and death categories | |
| - Deaths | |
| Establishments and disestablishments categories | |
| - Disestablishments | |
| Gregorian calendar | 125 BC |
| Ab urbe condita | 629 |
| Armenian calendar | N/A |
| Bahá'í calendar | -1968 – -1967 |
| Berber calendar | 826 |
| Buddhist calendar | 420 |
| Burmese calendar | -762 |
| Chinese calendar | 2512/2572 ([[Sexagenary cycle|]]年) — to —
2513/2573([[Sexagenary cycle|]]年) |
| Coptic calendar | -408 – -407 |
| Ethiopian calendar | -132 – -131 |
| Hebrew calendar | 3636 – 3637 |
| Hindu calendars | |
| - Vikram Samvat | -69 – -68 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 2977 – 2978 |
| Holocene calendar | 9876 |
| Iranian calendar | 746 BP – 745 BP |
| Islamic calendar | 769 BH – 768 BH |
| Japanese calendar | |
| - Imperial Year | Kōki 536 (皇紀536年) |
| Julian calendar | -79 |
| Korean calendar | 2209 |
| Thai solar calendar | 419 |
Events
By place
Syria
- Cleopatra Thea succeeds to the rule of the Seleucid Empire on the death of Seleucus V. She appoints Antiochus VIII Grypus as co-ruler.
Rome
- In Rome, Marcus Fulvius Flaccus proposes the extension of Roman citizenship to the northern Italians, but the Senate reacts by sending him off to deal with disturbances around Massilia. And in so doing commenced the conquest of Transalpine Gaul.
Births
Deaths
- Seleucus V Philometor (killed by Cleopatra Thea)
- Demetrius II, king of the Seleucid Empire
