| Centuries: | 3rd century · 4th century · 5th century |
| Decades: | 360s 370s 380s 390s 400s 410s 420s |
| Years: | 395 396 397 398 399 400 401 |
| 398 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 398 CCCXCVIII |
| Ab urbe condita | 1151 |
| Armenian calendar | N/A |
| Bahá'í calendar | -1446 – -1445 |
| Bengali calendar | -195 |
| Berber calendar | 1348 |
| Buddhist calendar | 942 |
| Burmese calendar | -240 |
| Byzantine calendar | 5906 – 5907 |
| Chinese calendar | 丁酉年十一月廿七日 (3034/3094-11-27) — to —
戊戌年閏十一月初七日(3035/3095-intercalary 11-7) |
| Coptic calendar | 114 – 115 |
| Ethiopian calendar | 390 – 391 |
| Hebrew calendar | 4158 – 4159 |
| Hindu calendars | |
| - Bikram Samwat | 454 – 455 |
| - Shaka Samvat | 320 – 321 |
| - Kali Yuga | 3499 – 3500 |
| Holocene calendar | 10398 |
| Iranian calendar | 224 BP – 223 BP |
| Islamic calendar | 231 BH – 230 BH |
| Japanese calendar | |
| Korean calendar | 2731 |
| Thai solar calendar | 941 |