| Millennium: | 1st millennium BC |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 406 BC by topic |
| Politics |
|---|
| Categories |
| Gregorian calendar | 406 BC CDVI BC |
| Ab urbe condita | 348 |
| Ancient Egypt era | XXVII dynasty, 120 |
| - Pharaoh | Darius II of Persia, 18 |
| Ancient Greek era | 93rd Olympiad, year 3 |
| Assyrian calendar | 4345 |
| Balinese saka calendar | N/A |
| Bengali calendar | −998 |
| Berber calendar | 545 |
| Buddhist calendar | 139 |
| Burmese calendar | −1043 |
| Byzantine calendar | 5103–5104 |
| Chinese calendar | 甲戌年 (Wood Dog) 2292 or 2085 — to — 乙亥年 (Wood Pig) 2293 or 2086 |
| Coptic calendar | −689 – −688 |
| Discordian calendar | 761 |
| Ethiopian calendar | −413 – −412 |
| Hebrew calendar | 3355–3356 |
| Hindu calendars | |
| - Vikram Samvat | −349 – −348 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 2695–2696 |
| Holocene calendar | 9595 |
| Iranian calendar | 1027 BP – 1026 BP |
| Islamic calendar | 1059 BH – 1058 BH |
| Javanese calendar | N/A |
| Julian calendar | N/A |
| Korean calendar | 1928 |
| Minguo calendar | 2317 before ROC 民前2317年 |
| Nanakshahi calendar | −1873 |
| Thai solar calendar | 137–138 |
| Tibetan calendar | 阳木狗年 (male Wood-Dog) −279 or −660 or −1432 — to — 阴木猪年 (female Wood-Pig) −278 or −659 or −1431 |
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.