Back 1391 Abkhazian 1391 Afrikaans 1391 ALS 1391 እ.ኤ.አ. Amharic 1391 AN 1391 Arabic 1391 AST 1391 AVK 1391 Azerbaijani ۱۳۹۱ (میلادی) AZB
| Millennium: | 2nd millennium |
|---|---|
| Centuries: | 13th century – 14th century – 15th century |
| Decades: | 1360s 1370s 1380s – 1390s – 1400s 1410s 1420s |
| Years: | 1388 1389 1390 – 1391 – 1392 1393 1394 |
| Gregorian calendar | 1391 MCCCXCI |
| Ab urbe condita | 2144 |
| Armenian calendar | 840 ԹՎ ՊԽ |
| Assyrian calendar | 6141 |
| Balinese saka calendar | 1312–1313 |
| Bengali calendar | 798 |
| Berber calendar | 2341 |
| English Regnal year | 14 Ric. 2 – 15 Ric. 2 |
| Buddhist calendar | 1935 |
| Burmese calendar | 753 |
| Byzantine calendar | 6899–6900 |
| Chinese calendar | 庚午年 (Metal Horse) 4087 or 4027 — to — 辛未年 (Metal Goat) 4088 or 4028 |
| Coptic calendar | 1107–1108 |
| Discordian calendar | 2557 |
| Ethiopian calendar | 1383–1384 |
| Hebrew calendar | 5151–5152 |
| Hindu calendars | |
| - Vikram Samvat | 1447–1448 |
| - Shaka Samvat | 1312–1313 |
| - Kali Yuga | 4491–4492 |
| Holocene calendar | 11391 |
| Igbo calendar | 391–392 |
| Iranian calendar | 769–770 |
| Islamic calendar | 793–794 |
| Japanese calendar | Meitoku 2 (明徳２年) |
| Javanese calendar | 1304–1305 |
| Julian calendar | 1391 MCCCXCI |
| Korean calendar | 3724 |
| Minguo calendar | 521 before ROC 民前521年 |
| Nanakshahi calendar | −77 |
| Thai solar calendar | 1933–1934 |
| Tibetan calendar | 阳金马年 (male Iron-Horse) 1517 or 1136 or 364 — to — 阴金羊年 (female Iron-Goat) 1518 or 1137 or 365 |
1391 (MCCCXCI) was a common year starting on Sunday of the Julian calendar, the 1391st year of the Common Era (CE) and Anno Domini (AD) designations, the 391st year of the 2nd millennium, the 91st year of the 14th century, and the 2nd year of the 1390s decade. As of the start of 1391, the Gregorian calendar was 8 days ahead of the Julian calendar, which was the dominant calendar of the time.