1331
| Years | 
|---|
| Millennium | 
| 2nd millennium | 
| Centuries | 
| Decades | 
| Years | 
| 1331 by topic | 
|---|
| Leaders | 
| 
 | 
| Birth and death categories | 
| Births – Deaths | 
| Establishments and disestablishments categories | 
| Establishments – Disestablishments | 
| Art and literature | 
| 1331 in poetry | 
| Gregorian calendar | 1331 MCCCXXXI | 
| Ab urbe condita | 2084 | 
| Armenian calendar | 780 ԹՎ ՉՁ | 
| Assyrian calendar | 6081 | 
| Balinese saka calendar | 1252–1253 | 
| Bengali calendar | 737–738 | 
| Berber calendar | 2281 | 
| English Regnal year | 4 Edw. 3 – 5 Edw. 3 | 
| Buddhist calendar | 1875 | 
| Burmese calendar | 693 | 
| Byzantine calendar | 6839–6840 | 
| Chinese calendar | 庚午年 (Metal Horse) 4028 or 3821 — to — 辛未年 (Metal Goat) 4029 or 3822 | 
| Coptic calendar | 1047–1048 | 
| Discordian calendar | 2497 | 
| Ethiopian calendar | 1323–1324 | 
| Hebrew calendar | 5091–5092 | 
| Hindu calendars | |
| - Vikram Samvat | 1387–1388 | 
| - Shaka Samvat | 1252–1253 | 
| - Kali Yuga | 4431–4432 | 
| Holocene calendar | 11331 | 
| Igbo calendar | 331–332 | 
| Iranian calendar | 709–710 | 
| Islamic calendar | 731–732 | 
| Japanese calendar | Gentoku 3 / Genkō 1 (元弘元年) | 
| Javanese calendar | 1243–1244 | 
| Julian calendar | 1331 MCCCXXXI | 
| Korean calendar | 3664 | 
| Minguo calendar | 581 before ROC 民前581年 | 
| Nanakshahi calendar | −137 | 
| Thai solar calendar | 1873–1874 | 
| Tibetan calendar | 阳金马年 (male Iron-Horse) 1457 or 1076 or 304 — to — 阴金羊年 (female Iron-Goat) 1458 or 1077 or 305 | 
Year 1331 (MCCCXXXI) was a common year starting on Tuesday of the Julian calendar.