931

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 century – 10th century – 11th century
Decades:	900s  910s  920s  – 930s –  940s  950s  960s
Years:	928 929 930 – 931 – 932 933 934

931 in other calendars

Gregorian calendar	931 CMXXXI
Ab urbe condita	1684
Armenian calendar	380 ԹՎ ՅՁ
Assyrian calendar	5681
Balinese saka calendar	852–853
Bengali calendar	338
Berber calendar	1881
Buddhist calendar	1475
Burmese calendar	293
Byzantine calendar	6439–6440
Chinese calendar	庚寅年 (Metal Tiger) 3627 or 3567     — to — 辛卯年 (Metal Rabbit) 3628 or 3568
Coptic calendar	647–648
Discordian calendar	2097
Ethiopian calendar	923–924
Hebrew calendar	4691–4692
Hindu calendars
- Vikram Samvat	987–988
- Shaka Samvat	852–853
- Kali Yuga	4031–4032
Holocene calendar	10931
Iranian calendar	309–310
Islamic calendar	318–319
Japanese calendar	Enchō 9 / Jōhei 1 (承平元年)
Javanese calendar	830–831
Julian calendar	931 CMXXXI
Korean calendar	3264
Minguo calendar	981 before ROC 民前981年
Nanakshahi calendar	−537
Seleucid era	1242/1243 AG
Thai solar calendar	1473–1474
Tibetan calendar	ལྕགས་ཕོ་སྟག་ལོ་ (male Iron-Tiger) 1057 or 676 or −96     — to — ལྕགས་མོ་ཡོས་ལོ་ (female Iron-Hare) 1058 or 677 or −95

Events

• Ramiro II of León becomes king of Kingdom of León.
• Eric Bloodaxe becomes the second king of Norway.
• March – Pope John XI succeeds Pope Stephen VII as the 125th pope.

Births

• Adelaide of Italy, wife of Otto I, Holy Roman Emperor
• Emperor Muzong of Liao

Deaths

• Emperor Uda of Japan
• King Harald I of Norway