| Millennium: | 1st millennium |
|---|---|
| Centuries: | 7th century – 8th century – 9th century |
| Decades: | 750s 760s 770s – 780s – 790s 800s 810s |
| Years: | 777 778 779 – 780 – 781 782 783 |
| 780 by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishment and disestablishment categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 780 DCCLXXX |
| Ab urbe condita | 1533 |
| Armenian calendar | 229 ԹՎ ՄԻԹ |
| Assyrian calendar | 5530 |
| Bahá'í calendar | -1064–-1063 |
| Bengali calendar | 187 |
| Berber calendar | 1730 |
| English Regnal year | N/A |
| Buddhist calendar | 1324 |
| Burmese calendar | 142 |
| Byzantine calendar | 6288–6289 |
| Chinese calendar | 己未年十一月二十日 (3416/3476-11-20) — to —
庚申年十二月初一日(3417/3477-12-1) |
| Coptic calendar | 496–497 |
| Ethiopian calendar | 772–773 |
| Hebrew calendar | 4540–4541 |
| Hindu calendars | |
| - Vikram Samvat | 836–837 |
| - Shaka Samvat | 702–703 |
| - Kali Yuga | 3881–3882 |
| Holocene calendar | 10780 |
| Iranian calendar | 158–159 |
| Islamic calendar | 163–164 |
| Japanese calendar | |
| Korean calendar | 3113 |
| Minguo calendar | 1132 before ROC 民前1132年 |
| Thai solar calendar | 1323 |
| Wikimedia Commons has media related to: 780 |
Year 780 (DCCLXXX) was a leap year starting on Saturday (link will display the full calendar) of the Julian calendar. 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.
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