| Millennium: | 1st millennium BC |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 398 BC by topic |
| Politics |
|---|
| Categories |
| Gregorian calendar | 398 BC CCCXCVIII BC |
| Ab urbe condita | 356 |
| Ancient Egypt era | XXIX dynasty, 1 |
| - Pharaoh | Nepherites I, 1 |
| Ancient Greek era | 95th Olympiad, year 3 |
| Assyrian calendar | 4353 |
| Balinese saka calendar | N/A |
| Bengali calendar | −990 |
| Berber calendar | 553 |
| Buddhist calendar | 147 |
| Burmese calendar | −1035 |
| Byzantine calendar | 5111–5112 |
| Chinese calendar | 壬午年 (Water Horse) 2300 or 2093 — to — 癸未年 (Water Goat) 2301 or 2094 |
| Coptic calendar | −681 – −680 |
| Discordian calendar | 769 |
| Ethiopian calendar | −405 – −404 |
| Hebrew calendar | 3363–3364 |
| Hindu calendars | |
| - Vikram Samvat | −341 – −340 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 2703–2704 |
| Holocene calendar | 9603 |
| Iranian calendar | 1019 BP – 1018 BP |
| Islamic calendar | 1050 BH – 1049 BH |
| Javanese calendar | N/A |
| Julian calendar | N/A |
| Korean calendar | 1936 |
| Minguo calendar | 2309 before ROC 民前2309年 |
| Nanakshahi calendar | −1865 |
| Thai solar calendar | 145–146 |
| Tibetan calendar | 阳水马年 (male Water-Horse) −271 or −652 or −1424 — to — 阴水羊年 (female Water-Goat) −270 or −651 or −1423 |
Year 398 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Tribunate of Potitus, Medullinus, Lactucinus, Fidenas, Camillus and Cornutus (or, less frequently, year 356 Ab urbe condita). The denomination 398 BC 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.