| Millennium: | 1st millennium |
|---|---|
| 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 |
| Assyrian calendar | 5148 |
| Bahá'í calendar | -1446–-1445 |
| Bengali calendar | -195 |
| Berber calendar | 1348 |
| English Regnal year | N/A |
| 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 | |
| - Vikram Samvat | 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 |
| Minguo calendar | 1514 before ROC 民前1514年 |
| Thai solar calendar | 941 |
Year 398 (CCCXCVIII) was a common year starting on Friday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Augustus and Eutychianus (or, less frequently, year 1151 Ab urbe condita). The denomination 398 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.