| Centuries: | 4th century · 5th century · 6th century |
| Decades: | 410s 420s 430s 440s 450s 460s 470s |
| Years: | 437 438 439 440 441 442 443 |
| 440 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 440 CDXL |
| Ab urbe condita | 1193 |
| Armenian calendar | N/A |
| Bahá'í calendar | -1404 – -1403 |
| Bengali calendar | -153 |
| Berber calendar | 1390 |
| Buddhist calendar | 984 |
| Burmese calendar | -198 |
| Byzantine calendar | 5948 – 5949 |
| Chinese calendar | 己卯年十一月十一日 (3076/3136-11-11) — to —
庚辰年十一月廿二日(3077/3137-11-22) |
| Coptic calendar | 156 – 157 |
| Ethiopian calendar | 432 – 433 |
| Hebrew calendar | 4200 – 4201 |
| Hindu calendars | |
| - Bikram Samwat | 496 – 497 |
| - Shaka Samvat | 362 – 363 |
| - Kali Yuga | 3541 – 3542 |
| Holocene calendar | 10440 |
| Iranian calendar | 182 BP – 181 BP |
| Islamic calendar | 188 BH – 187 BH |
| Japanese calendar | |
| Korean calendar | 2773 |
| Thai solar calendar | 983 |