1231

1231 in othercalendars
Gregorian calendar	1231; MCCXXXI
Ab urbe condita	1984
Armenian calendar	680; ԹՎ ՈՁ
Assyrian calendar	5981
Balinese saka calendar	1152–1153
Bengali calendar	638
Berber calendar	2181
English Regnal year	15Hen. 3– 16Hen. 3
Buddhist calendar	1775
Burmese calendar	593
Byzantine calendar	6739–6740
Chinese calendar	Canh dầnNăm(MetalTiger); 3927 or 3867; — to —; Tân mão năm(MetalRabbit); 3928 or 3868
Coptic calendar	947–948
Discordian calendar	2397
Ethiopian calendar	1223–1224
Hebrew calendar	4991–4992
Hindu calendars
-Vikram Samvat	1287–1288
-Shaka Samvat	1152–1153
-Kali Yuga	4331–4332
Holocene calendar	11231
Igbo calendar	231–232
Iranian calendar	609–610
Islamic calendar	628–629
Japanese calendar	Kangi3; ( khoan hỉ ３ năm )
Javanese calendar	1140–1141
Julian calendar	1231; MCCXXXI
Korean calendar	3564
Minguo calendar	681 beforeROC; Dân trước 681 năm
Nanakshahi calendar	−237
Thai solar calendar	1773–1774
Tibetan calendar	Dương kim hổ năm; (male Iron-Tiger); 1357 or 976 or 204; — to —; Âm kim thỏ năm; (female Iron-Rabbit); 1358 or 977 or 205

Millennium:	2nd millennium
Centuries:	12th century–13th century–14th century
Decades:	1200s1210s1220s–1230s–1240s1250s1260s
Years:	122812291230–1231–123212331234

1231(MCCXXXI) was acommon year starting on Wednesdayof theJulian calendar,the 1231st year of theCommon Era(CE) andAnno Domini(AD) designations, the 231st year of the2nd millennium,the 31st year of the13th century,and the 2nd year of the1230sdecade. As of the start of 1231, the Gregorian calendar was 7 days ahead of the Julian calendar, which was the dominant calendar of the time.

Births