| Centuries: | 4th century · 5th century · 6th century |
| Decades: | 390s 400s 410s 420s 430s 440s 450s |
| Years: | 424 425 426 427 428 429 430 |
| 427 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 427 CDXXVII |
| Ab urbe condita | 1180 |
| Armenian calendar | N/A |
| Bahá'í calendar | -1417 – -1416 |
| Bengali calendar | -166 |
| Berber calendar | 1377 |
| Buddhist calendar | 971 |
| Burmese calendar | -211 |
| Byzantine calendar | 5935 – 5936 |
| Chinese calendar | 丙寅年十一月十八日 (3063/3123-11-18) — to —
丁卯年十一月廿七日(3064/3124-11-27) |
| Coptic calendar | 143 – 144 |
| Ethiopian calendar | 419 – 420 |
| Hebrew calendar | 4187 – 4188 |
| Hindu calendars | |
| - Bikram Samwat | 483 – 484 |
| - Shaka Samvat | 349 – 350 |
| - Kali Yuga | 3528 – 3529 |
| Holocene calendar | 10427 |
| Iranian calendar | 195 BP – 194 BP |
| Islamic calendar | 201 BH – 200 BH |
| Japanese calendar | |
| Korean calendar | 2760 |
| Thai solar calendar | 970 |