| Millennium: | 2nd millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 1321 by topic |
|---|
| Leaders |
| Birth and death categories |
| Births – Deaths |
| Establishments and disestablishments categories |
| Establishments – Disestablishments |
| Art and literature |
| 1321 in poetry |
| Gregorian calendar | 1321 MCCCXXI |
| Ab urbe condita | 2074 |
| Armenian calendar | 770 ԹՎ ՉՀ |
| Assyrian calendar | 6071 |
| Balinese saka calendar | 1242–1243 |
| Bengali calendar | 728 |
| Berber calendar | 2271 |
| English Regnal year | 14 Edw. 2 – 15 Edw. 2 |
| Buddhist calendar | 1865 |
| Burmese calendar | 683 |
| Byzantine calendar | 6829–6830 |
| Chinese calendar | 庚申年 (Metal Monkey) 4018 or 3811 — to — 辛酉年 (Metal Rooster) 4019 or 3812 |
| Coptic calendar | 1037–1038 |
| Discordian calendar | 2487 |
| Ethiopian calendar | 1313–1314 |
| Hebrew calendar | 5081–5082 |
| Hindu calendars | |
| - Vikram Samvat | 1377–1378 |
| - Shaka Samvat | 1242–1243 |
| - Kali Yuga | 4421–4422 |
| Holocene calendar | 11321 |
| Igbo calendar | 321–322 |
| Iranian calendar | 699–700 |
| Islamic calendar | 720–721 |
| Japanese calendar | Gen'ō 3 / Genkō 1 (元亨元年) |
| Javanese calendar | 1232–1233 |
| Julian calendar | 1321 MCCCXXI |
| Korean calendar | 3654 |
| Minguo calendar | 591 before ROC 民前591年 |
| Nanakshahi calendar | −147 |
| Thai solar calendar | 1863–1864 |
| Tibetan calendar | 阳金猴年 (male Iron-Monkey) 1447 or 1066 or 294 — to — 阴金鸡年 (female Iron-Rooster) 1448 or 1067 or 295 |
Year 1321 (MCCCXXI) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar.