931 (CMXXXI) was a common year starting on Saturday of the Julian calendar, the 931st year of the Common Era (CE) and Anno Domini (AD) designations, the 931st year of the 1st millennium, the 31st year of the 10th century, and the 2nd year of the 930s decade. As of the start of 931, the Gregorian calendar was 5 days ahead of the Julian calendar, which was the dominant calendar of the time.

Millennium: 1st millennium
Centuries: 9th century10th century11th century
Decades: 900s  910s  920s  – 930s –  940s  950s  960s
Years: 928 929 930931932 933 934
931 in other calendars
Gregorian calendar931
CMXXXI
Ab urbe condita1684
Armenian calendar380
ԹՎ ՅՁ
Assyrian calendar5681
Balinese saka calendar852–853
Bengali calendar338
Berber calendar1881
Buddhist calendar1475
Burmese calendar293
Byzantine calendar6439–6440
Chinese calendar庚寅(Metal Tiger)
3627 or 3567
    — to —
辛卯年 (Metal Rabbit)
3628 or 3568
Coptic calendar647–648
Discordian calendar2097
Ethiopian calendar923–924
Hebrew calendar4691–4692
Hindu calendars
 - Vikram Samvat987–988
 - Shaka Samvat852–853
 - Kali Yuga4031–4032
Holocene calendar10931
Iranian calendar309–310
Islamic calendar318–319
Japanese calendarEnchō 9 / Jōhei 1
(承平元年)
Javanese calendar830–831
Julian calendar931
CMXXXI
Korean calendar3264
Minguo calendar981 before ROC
民前981年
Nanakshahi calendar−537
Seleucid era1242/1243 AG
Thai solar calendar1473–1474
Tibetan calendar阳金虎年
(male Iron-Tiger)
1057 or 676 or −96
    — to —
阴金兔年
(female Iron-Rabbit)
1058 or 677 or −95

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Births change

Deaths change