399 BC

Millennium: 1st millennium BC
Centuries:
Decades:
Years:
399 BC in various calendars
Gregorian calendar399 BC
CCCXCIX BC
Ab urbe condita355
Ancient Egypt eraXXVIII dynasty, 6
- PharaohAmyrtaeus, 6
Ancient Greek era95th Olympiad, year 2
Assyrian calendar4352
Balinese saka calendarN/A
Bengali calendar−991
Berber calendar552
Buddhist calendar146
Burmese calendar−1036
Byzantine calendar5110–5111
Chinese calendar辛巳年 (Metal Snake)
2299 or 2092
    — to —
壬午年 (Water Horse)
2300 or 2093
Coptic calendar−682 – −681
Discordian calendar768
Ethiopian calendar−406 – −405
Hebrew calendar3362–3363
Hindu calendars
 - Vikram Samvat−342 – −341
 - Shaka SamvatN/A
 - Kali Yuga2702–2703
Holocene calendar9602
Iranian calendar1020 BP – 1019 BP
Islamic calendar1051 BH – 1050 BH
Javanese calendarN/A
Julian calendarN/A
Korean calendar1935
Minguo calendar2310 before ROC
民前2310年
Nanakshahi calendar−1866
Thai solar calendar144–145
Tibetan calendar阴金蛇年
(female Iron-Snake)
−272 or −653 or −1425
    — to —
阳水马年
(male Water-Horse)
−271 or −652 or −1424

Year 399 BC was a year of the pre-Julian Roman calendar. At the time, it was known as the Year of the Tribunate of Augurinus, Longus, Priscus, Cicurinus, Rufus and Philo (or, less frequently, year 355 Ab urbe condita). The denomination 399 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.