| 406 BC by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishments and disestablishments categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 406 BC |
| Ab urbe condita | 348 |
| Armenian calendar | N/A |
| Assyrian calendar | 4345 |
| Bahá'í calendar | -2249–-2248 |
| Bengali calendar | -998 |
| Berber calendar | 545 |
| English Regnal year | N/A |
| Buddhist calendar | 139 |
| Burmese calendar | -1043 |
| Byzantine calendar | 5103–5104 |
| Chinese calendar | 甲戌年 (2231/2291) — to —
乙亥年(2232/2292) |
| Coptic calendar | -689–-688 |
| Ethiopian calendar | -413–-412 |
| Hebrew calendar | 3355–3356 |
| Hindu calendars | |
| - Vikram Samvat | -349–-348 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 2696–2697 |
| Holocene calendar | 9595 |
| Iranian calendar | 1027 BP – 1026 BP |
| Islamic calendar | 1059 BH – 1058 BH |
| Japanese calendar | |
| Julian calendar | |
| Korean calendar | 1928 |
| Minguo calendar | 2317 before ROC 民前2317年 |
| Thai solar calendar | 138 |
| Wikimedia Commons has media related to: 406 BC |
Year 406 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Tribunate of Cossus, Ambustus, Cossus and Potitus (or, less frequently, year 348 Ab urbe condita). The denomination 406 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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