| Millennium: | 1st millennium |
|---|---|
| Centuries: | |
| Decades: | |
| Years: |
| 780 by topic |
|---|
| Leaders |
| Categories |
| Gregorian calendar | 780 DCCLXXX |
| Ab urbe condita | 1533 |
| Armenian calendar | 229 ԹՎ ՄԻԹ |
| Assyrian calendar | 5530 |
| Balinese saka calendar | 701–702 |
| Bengali calendar | 187 |
| Berber calendar | 1730 |
| Buddhist calendar | 1324 |
| Burmese calendar | 142 |
| Byzantine calendar | 6288–6289 |
| Chinese calendar | 己未年 (Earth Goat) 3477 or 3270 — to — 庚申年 (Metal Monkey) 3478 or 3271 |
| Coptic calendar | 496–497 |
| Discordian calendar | 1946 |
| Ethiopian calendar | 772–773 |
| Hebrew calendar | 4540–4541 |
| Hindu calendars | |
| - Vikram Samvat | 836–837 |
| - Shaka Samvat | 701–702 |
| - Kali Yuga | 3880–3881 |
| Holocene calendar | 10780 |
| Iranian calendar | 158–159 |
| Islamic calendar | 163–164 |
| Japanese calendar | Hōki 11 (宝亀１１年) |
| Javanese calendar | 675–676 |
| Julian calendar | 780 DCCLXXX |
| Korean calendar | 3113 |
| Minguo calendar | 1132 before ROC 民前1132年 |
| Nanakshahi calendar | −688 |
| Seleucid era | 1091/1092 AG |
| Thai solar calendar | 1322–1323 |
| Tibetan calendar | 阴土羊年 (female Earth-Goat) 906 or 525 or −247 — to — 阳金猴年 (male Iron-Monkey) 907 or 526 or −246 |
Year 780 (DCCLXXX) was a leap year starting on Saturday of the Julian calendar, the 780th year of the Common Era (CE) and Anno Domini (AD) designations, the 780th year of the 1st millennium, the 80th year of the 8th century, and the 1st year of the 780s decade. The denomination 780 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.