631

Millennium: 1st millennium
Centuries:
Decades:
Years:
631 in various calendars
Gregorian calendar631
DCXXXI
Ab urbe condita1384
Armenian calendar80
ԹՎ Ձ
Assyrian calendar5381
Balinese saka calendar552–553
Bengali calendar38
Berber calendar1581
Buddhist calendar1175
Burmese calendar−7
Byzantine calendar6139–6140
Chinese calendar庚寅年 (Metal Tiger)
3328 or 3121
    — to —
辛卯年 (Metal Rabbit)
3329 or 3122
Coptic calendar347–348
Discordian calendar1797
Ethiopian calendar623–624
Hebrew calendar4391–4392
Hindu calendars
 - Vikram Samvat687–688
 - Shaka Samvat552–553
 - Kali Yuga3731–3732
Holocene calendar10631
Iranian calendar9–10
Islamic calendar9–10
Japanese calendarN/A
Javanese calendar521–522
Julian calendar631
DCXXXI
Korean calendar2964
Minguo calendar1281 before ROC
民前1281年
Nanakshahi calendar−837
Seleucid era942/943 AG
Thai solar calendar1173–1174
Tibetan calendar阳金虎年
(male Iron-Tiger)
757 or 376 or −396
    — to —
阴金兔年
(female Iron-Rabbit)
758 or 377 or −395
King Sisenand (c. 605–636)

Year 631 (DCXXXI) was a common year starting on Tuesday (link will display the full calendar) of the Julian calendar. The denomination 631 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.