1391
| Years | 
|---|
| Millennium | 
| 2nd millennium | 
| Centuries | 
| Decades | 
| Years | 
| 1391 by topic | 
|---|
| Leaders | 
| 
 | 
| Birth and death categories | 
| Births – Deaths | 
| Establishments and disestablishments categories | 
| Establishments – Disestablishments | 
| Art and literature | 
| 1391 in poetry | 
| Gregorian calendar | 1391 MCCCXCI | 
| Ab urbe condita | 2144 | 
| Armenian calendar | 840 ԹՎ ՊԽ | 
| Assyrian calendar | 6141 | 
| Balinese saka calendar | 1312–1313 | 
| Bengali calendar | 797–798 | 
| 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) 4088 or 3881 — to — 辛未年 (Metal Goat) 4089 or 3882 | 
| 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 | 
Year 1391 (MCCCXCI) was a common year starting on Sunday of the Julian calendar.