| Years |
|---|
| Millennium |
| 2nd millennium |
| Centuries |
| Decades |
| Years |
| Gregorian calendar | 1380 MCCCLXXX |
| Ab urbe condita | 2133 |
| Armenian calendar | 829 ԹՎ ՊԻԹ |
| Assyrian calendar | 6130 |
| Balinese saka calendar | 1301–1302 |
| Bengali calendar | 787 |
| Berber calendar | 2330 |
| English Regnal year | 3 Ric. 2 – 4 Ric. 2 |
| Buddhist calendar | 1924 |
| Burmese calendar | 742 |
| Byzantine calendar | 6888–6889 |
| Chinese calendar | 己未年 (Earth Goat) 4076 or 4016 — to — 庚申年 (Metal Monkey) 4077 or 4017 |
| Coptic calendar | 1096–1097 |
| Discordian calendar | 2546 |
| Ethiopian calendar | 1372–1373 |
| Hebrew calendar | 5140–5141 |
| Hindu calendars | |
| - Vikram Samvat | 1436–1437 |
| - Shaka Samvat | 1301–1302 |
| - Kali Yuga | 4480–4481 |
| Holocene calendar | 11380 |
| Igbo calendar | 380–381 |
| Iranian calendar | 758–759 |
| Islamic calendar | 781–782 |
| Japanese calendar | Kōryaku 2 (康暦２年) |
| Javanese calendar | 1293–1294 |
| Julian calendar | 1380 MCCCLXXX |
| Korean calendar | 3713 |
| Minguo calendar | 532 before ROC 民前532年 |
| Nanakshahi calendar | −88 |
| Thai solar calendar | 1922–1923 |
| Tibetan calendar | ས་མོ་ལུག་ལོ་ (female Earth-Sheep) 1506 or 1125 or 353 — to — ལྕགས་ཕོ་སྤྲེ་ལོ་ (male Iron-Monkey) 1507 or 1126 or 354 |
1380 (MCCCLXXX) was a leap year starting on Sunday of the Julian calendar, the 1380th year of the Common Era (CE) and Anno Domini (AD) designations, the 380th year of the 2nd millennium, the 80th year of the 14th century, and the 1st year of the 1380s decade. As of the start of 1380, the Gregorian calendar was 8 days ahead of the Julian calendar, which was the dominant calendar of the time.