| Centuries: | 6th century BC - 5th century BC - 4th century BC |
| Decades: | 430s BC 420s BC 410s BC - 400s BC - 390s BC 380s BC 370s BC |
| Years: | 407 BC 406 BC 405 BC - 404 BC - 403 BC 402 BC 401 BC |
| 404 BC by topic | |
| Politics | |
| State leaders - Sovereign states | |
| Birth and death categories | |
| Births - Deaths | |
| Establishments and disestablishments categories | |
| Establishments - Disestablishments | |
| Gregorian calendar | 404 BC |
| Ab urbe condita | 350 |
| Armenian calendar | N/A |
| Bahá'í calendar | -2247 – -2246 |
| Berber calendar | 547 |
| Buddhist calendar | 141 |
| Burmese calendar | -1041 |
| Chinese calendar | 2233/2293 (子年) — to —
2234/2294([[Sexagenary cycle|]]年) |
| Coptic calendar | -687 – -686 |
| Ethiopian calendar | -411 – -410 |
| Hebrew calendar | 3357 – 3358 |
| Hindu calendars | |
| - Vikram Samvat | -348 – -347 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 2698 – 2699 |
| Holocene calendar | 9597 |
| Iranian calendar | 1025 BP – 1024 BP |
| Islamic calendar | 1057 BH – 1055 BH |
| Japanese calendar | |
| Korean calendar | 1930 |
| Thai solar calendar | 140 |