| 124 BC by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishments and disestablishments categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 124 BC |
| Ab urbe condita | 630 |
| Armenian calendar | N/A |
| Assyrian calendar | 4627 |
| Bahá'í calendar | -1967–-1966 |
| Bengali calendar | -716 |
| Berber calendar | 827 |
| English Regnal year | N/A |
| Buddhist calendar | 421 |
| Burmese calendar | -761 |
| Byzantine calendar | 5385–5386 |
| Chinese calendar | 丙辰年 (2513/2573) — to —
丁巳年(2514/2574) |
| Coptic calendar | -407–-406 |
| Ethiopian calendar | -131–-130 |
| Hebrew calendar | 3637–3638 |
| Hindu calendars | |
| - Vikram Samvat | -67–-66 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 2978–2979 |
| Holocene calendar | 9877 |
| Iranian calendar | 745 BP – 744 BP |
| Islamic calendar | 768 BH – 767 BH |
| Japanese calendar | |
| Korean calendar | 2210 |
| Minguo calendar | 2035 before ROC 民前2035年 |
| Thai solar calendar | 420 |
Year 124 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Longinus and Calvinus (or, less frequently, year 630 Ab urbe condita). The denomination 124 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.