| Millennium: | 1st Millennium |
|---|---|
| Centuries: | 4th cent. – 5th cent. – 6th cent. |
| Decades: | 390s 400s 410s – 420s – 430s 440s 450s |
| Years: | 424 425 426 – 427 – 428 429 430 |
| Gregorian calendar | 427 CDXXVII |
| Ab urbe condita | 1180 |
| Assyrian calendar | 5177 |
| Bengali calendar | −166 |
| Berber calendar | 1377 |
| Buddhist calendar | 971 |
| Burmese calendar | −211 |
| Byzantine calendar | 5935–5936 |
| Chinese calendar | 丙寅年 (Fire Tiger) 3123 or 3063 — to — 丁卯年 (Fire Rabbit) 3124 or 3064 |
| Coptic calendar | 143–144 |
| Discordian calendar | 1593 |
| Ethiopian calendar | 419–420 |
| Hebrew calendar | 4187–4188 |
| Hindu calendars | |
| - Vikram Samvat | 483–484 |
| - Shaka Samvat | 348–349 |
| - Kali Yuga | 3527–3528 |
| Holocene calendar | 10427 |
| Iranian calendar | 195 BP – 194 BP |
| Islamic calendar | 201 BH – 200 BH |
| Javanese calendar | 311–312 |
| Julian calendar | 427 CDXXVII |
| Korean calendar | 2760 |
| Minguo calendar | 1485 before ROC 民前1485年 |
| Nanakshahi calendar | −1041 |
| Seleucid era | 738/739 AG |
| Thai solar calendar | 969–970 |
The year 427 BC