| 450 BC by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishments and disestablishments categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 450 BC |
| Ab urbe condita | 304 |
| Armenian calendar | N/A |
| Bahá'í calendar | -2293 – -2292 |
| Bengali calendar | -1042 |
| Berber calendar | 501 |
| Buddhist calendar | 95 |
| Burmese calendar | -1087 |
| Byzantine calendar | 5059 – 5060 |
| Chinese calendar | [[Sexagenary cycle|]]年 (2187/2247) — to —
[[Sexagenary cycle|]]年(2188/2248) |
| Coptic calendar | -733 – -732 |
| Ethiopian calendar | -457 – -456 |
| Hebrew calendar | 3311 – 3312 |
| Hindu calendars | |
| - Vikram Samvat | -394 – -393 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 2652 – 2653 |
| Holocene calendar | 9551 |
| Iranian calendar | 1071 BP – 1070 BP |
| Islamic calendar | 1104 BH – 1103 BH |
| Japanese calendar | |
| Korean calendar | 1884 |
| Thai solar calendar | 94 |
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