631 BC

Millennium: 1st millennium BC
Centuries:
Decades:
Years:
631 BC in various calendars
Gregorian calendar631 BC
DCXXXI BC
Ab urbe condita123
Ancient Egypt eraXXVI dynasty, 34
- PharaohPsamtik I, 34
Ancient Greek era37th Olympiad, year 2
Assyrian calendar4120
Balinese saka calendarN/A
Bengali calendar−1223
Berber calendar320
Buddhist calendar−86
Burmese calendar−1268
Byzantine calendar4878–4879
Chinese calendar己丑年 (Earth Ox)
2067 or 1860
    — to —
庚寅年 (Metal Tiger)
2068 or 1861
Coptic calendar−914 – −913
Discordian calendar536
Ethiopian calendar−638 – −637
Hebrew calendar3130–3131
Hindu calendars
 - Vikram Samvat−574 – −573
 - Shaka SamvatN/A
 - Kali Yuga2470–2471
Holocene calendar9370
Iranian calendar1252 BP – 1251 BP
Islamic calendar1290 BH – 1289 BH
Javanese calendarN/A
Julian calendarN/A
Korean calendar1703
Minguo calendar2542 before ROC
民前2542年
Nanakshahi calendar−2098
Thai solar calendar−88 – −87
Tibetan calendar阴土牛年
(female Earth-Ox)
−504 or −885 or −1657
    — to —
阳金虎年
(male Iron-Tiger)
−503 or −884 or −1656

The year 631 BC was a year of the pre-Julian Roman calendar. In the Roman Empire, it was known as year 123 Ab urbe condita . The denomination 631 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.