631 BC

Millennium:	1st millennium BC
Centuries:	8th century BC – 7th century BC – 6th century BC
Decades:	660s BC  650s BC  640s BC  – 630s BC –  620s BC  610s BC  600s BC
Years:	634 BC 633 BC 632 BC – 631 BC – 630 BC 629 BC 628 BC

631 BC in other calendars

Gregorian calendar	631 BC DCXXX BC
Ab urbe condita	123
Ancient Egypt era	XXVI dynasty, 34
- Pharaoh	Psamtik I, 34
Ancient Greek era	37th Olympiad, year 2
Assyrian calendar	4120
Bengali calendar	−1223
Berber calendar	320
Buddhist calendar	−86
Burmese calendar	−1268
Byzantine calendar	4878–4879
Chinese calendar	己丑年 (Earth Ox) 2066 or 2006     — to — 庚寅年 (Metal Tiger) 2067 or 2007
Coptic calendar	−914 – −913
Discordian calendar	536
Ethiopian calendar	−638 – −637
Hebrew calendar	3130–3131
Hindu calendars
- Vikram Samvat	−574 – −573
- Shaka Samvat	N/A
- Kali Yuga	2471–2472
Holocene calendar	9370
Iranian calendar	1252 BP – 1251 BP
Islamic calendar	1290 BH – 1289 BH
Julian calendar	N/A
Korean calendar	1703
Minguo calendar	2542 before ROC 民前2542年
Thai solar calendar	−88 – −87

Events

• Cyrene, a Greek colony in present-day Libya, North Africa, is founded (approximate date).
• Sadyattes becomes king of Lydia.