| Centuries: | 4th century · 5th century · 6th century |
| Decades: | 380s 390s 400s 410s 420s 430s 440s |
| Years: | 415 416 417 418 419 420 421 |
| 418 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 418 CDXVIII |
| Ab urbe condita | 1171 |
| Armenian calendar | N/A |
| Bahá'í calendar | -1426 – -1425 |
| Bengali calendar | -175 |
| Berber calendar | 1368 |
| Buddhist calendar | 962 |
| Burmese calendar | -220 |
| Byzantine calendar | 5926 – 5927 |
| Chinese calendar | 丁巳年十二月初九日 (3054/3114-12-9) — to —
戊午年十一月十八日(3055/3115-11-18) |
| Coptic calendar | 134 – 135 |
| Ethiopian calendar | 410 – 411 |
| Hebrew calendar | 4178 – 4179 |
| Hindu calendars | |
| - Bikram Samwat | 474 – 475 |
| - Shaka Samvat | 340 – 341 |
| - Kali Yuga | 3519 – 3520 |
| Holocene calendar | 10418 |
| Iranian calendar | 204 BP – 203 BP |
| Islamic calendar | 210 BH – 209 BH |
| Japanese calendar | |
| Korean calendar | 2751 |
| Thai solar calendar | 961 |