| Millennium: | 2nd Millennium |
|---|---|
| Centuries: | 13th cent. – 14th cent. – 15th cent. |
| Decades: | 1310s 1320s 1330s – 1340s – 1350s 1360s 1370s |
| Years: | 1337 1338 1339 – 1340 – 1341 1342 1343 |
| Gregorian calendar | 1340 MCCCXL |
| Ab urbe condita | 2093 |
| Armenian calendar | 789 ԹՎ ՉՁԹ |
| Assyrian calendar | 6090 |
| Bengali calendar | 747 |
| Berber calendar | 2290 |
| English Regnal year | 13 Edw. 3 – 14 Edw. 3 |
| Buddhist calendar | 1884 |
| Burmese calendar | 702 |
| Byzantine calendar | 6848–6849 |
| Chinese calendar | 己卯年 (Earth Rabbit) 4036 or 3976 — to — 庚辰年 (Metal Dragon) 4037 or 3977 |
| Coptic calendar | 1056–1057 |
| Discordian calendar | 2506 |
| Ethiopian calendar | 1332–1333 |
| Hebrew calendar | 5100–5101 |
| Hindu calendars | |
| - Vikram Samvat | 1396–1397 |
| - Shaka Samvat | 1261–1262 |
| - Kali Yuga | 4440–4441 |
| Holocene calendar | 11340 |
| Igbo calendar | 340–341 |
| Iranian calendar | 718–719 |
| Islamic calendar | 740–741 |
| Japanese calendar | Ryakuō 3 (暦応３年) |
| Javanese calendar | 1252–1253 |
| Julian calendar | 1340 MCCCXL |
| Korean calendar | 3673 |
| Minguo calendar | 572 before ROC 民前572年 |
| Nanakshahi calendar | −128 |
| Thai solar calendar | 1882–1883 |
The year 1340 BC