| Centuries: | 4th century · 5th century · 6th century |
| Decades: | 390s 400s 410s 420s 430s 440s 450s |
| Years: | 423 424 425 426 427 428 429 |
| 426 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 426 CDXXVI |
| Ab urbe condita | 1179 |
| Armenian calendar | N/A |
| Bahá'í calendar | -1418 – -1417 |
| Bengali calendar | -167 |
| Berber calendar | 1376 |
| Buddhist calendar | 970 |
| Burmese calendar | -212 |
| Byzantine calendar | 5934 – 5935 |
| Chinese calendar | 乙丑年十二月初七日 (3062/3122-12-7) — to —
丙寅年十一月十七日(3063/3123-11-17) |
| Coptic calendar | 142 – 143 |
| Ethiopian calendar | 418 – 419 |
| Hebrew calendar | 4186 – 4187 |
| Hindu calendars | |
| - Bikram Samwat | 482 – 483 |
| - Shaka Samvat | 348 – 349 |
| - Kali Yuga | 3527 – 3528 |
| Holocene calendar | 10426 |
| Iranian calendar | 196 BP – 195 BP |
| Islamic calendar | 202 BH – 201 BH |
| Japanese calendar | |
| Korean calendar | 2759 |
| Thai solar calendar | 969 |