| Millennium: | 1st millennium BC |
|---|---|
| Centuries: | 6th century BC – 5th century BC – 4th century BC |
| Decades: | 450s BC 440s BC 430s BC – 420s BC – 410s BC 400s BC 390s BC |
| Years: | 427 BC 426 BC 425 BC – 424 BC – 423 BC 422 BC 421 BC |
| 424 BC by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishments and disestablishments categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 424 BC |
| Ab urbe condita | 330 |
| Armenian calendar | N/A |
| Assyrian calendar | 4327 |
| Bahá'í calendar | -2267 – -2266 |
| Bengali calendar | -1016 |
| Berber calendar | 527 |
| English Regnal year | N/A |
| Buddhist calendar | 121 |
| Burmese calendar | -1061 |
| Byzantine calendar | 5085 – 5086 |
| Chinese calendar | 丙辰年 (2213/2273) — to —
丁巳年(2214/2274) |
| Coptic calendar | -707 – -706 |
| Ethiopian calendar | -431 – -430 |
| Hebrew calendar | 3337 – 3338 |
| Hindu calendars | |
| - Bikram Samwat | -367 – -366 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 2678 – 2679 |
| Holocene calendar | 9577 |
| Iranian calendar | 1045 BP – 1044 BP |
| Islamic calendar | 1077 BH – 1076 BH |
| Japanese calendar | |
| Korean calendar | 1910 |
| Minguo calendar | 2335 before ROC 民前2335年 |
| Thai solar calendar | 120 |
| Wikimedia Commons has media related to: 424 BC |
Year 424 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Tribunate of Crassus, Fidenas, Rutilus and Iullus (or, less frequently, year 330 Ab urbe condita). The denomination 424 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.
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