| Years |
|---|
| Millennium |
| 2nd millennium |
| Centuries |
| Decades |
| Years |
| Gregorian calendar | 1311 MCCCXI |
| Ab urbe condita | 2064 |
| Armenian calendar | 760 ԹՎ ՉԿ |
| Assyrian calendar | 6061 |
| Balinese saka calendar | 1232–1233 |
| Bengali calendar | 718 |
| Berber calendar | 2261 |
| English Regnal year | 4 Edw. 2 – 5 Edw. 2 |
| Buddhist calendar | 1855 |
| Burmese calendar | 673 |
| Byzantine calendar | 6819–6820 |
| Chinese calendar | 庚戌年 (Metal Dog) 4007 or 3947 — to — 辛亥年 (Metal Pig) 4008 or 3948 |
| Coptic calendar | 1027–1028 |
| Discordian calendar | 2477 |
| Ethiopian calendar | 1303–1304 |
| Hebrew calendar | 5071–5072 |
| Hindu calendars | |
| - Vikram Samvat | 1367–1368 |
| - Shaka Samvat | 1232–1233 |
| - Kali Yuga | 4411–4412 |
| Holocene calendar | 11311 |
| Igbo calendar | 311–312 |
| Iranian calendar | 689–690 |
| Islamic calendar | 710–711 |
| Japanese calendar | Enkyō 4 / Ōchō 1 (応長元年) |
| Javanese calendar | 1222–1223 |
| Julian calendar | 1311 MCCCXI |
| Korean calendar | 3644 |
| Minguo calendar | 601 before ROC 民前601年 |
| Nanakshahi calendar | −157 |
| Thai solar calendar | 1853–1854 |
| Tibetan calendar | ལྕགས་ཕོ་ཁྱི་ལོ་ (male Iron-Dog) 1437 or 1056 or 284 — to — ལྕགས་མོ་ཕག་ལོ་ (female Iron-Boar) 1438 or 1057 or 285 |
1311 (MCCCXI) was a common year starting on Friday of the Julian calendar, the 1311th year of the Common Era (CE) and Anno Domini (AD) designations, the 311th year of the 2nd millennium, the 11th year of the 14th century, and the 2nd year of the 1310s decade. As of the start of 1311, the Gregorian calendar was 8 days ahead of the Julian calendar, which was the dominant calendar of the time.