|Centuries:||7th century – 8th century – 9th century|
|Decades:||750s 760s 770s – 780s – 790s 800s 810s|
|Years:||783 784 785 – 786 – 787 788 789|
|786 by topic|
|State leaders – Sovereign states|
|Birth and death categories|
|Births – Deaths|
|Establishment and disestablishment categories|
|Establishments – Disestablishments|
|Ab urbe condita||1539|
|Bahá'í calendar||−1058 – −1057|
|English Regnal year||N/A|
|Chinese calendar||乙丑年 (Wood Ox)
3482 or 3422
— to —
丙寅年 (Fire Tiger)
3483 or 3423
|- Vikram Samvat||842–843|
|- Shaka Samvat||708–709|
|- Kali Yuga||3887–3888|
|Igbo calendar||−214 – −213|
|Japanese calendar||Enryaku 5
|Minguo calendar||1126 before ROC
|Thai solar calendar||1329|
|Wikimedia Commons has media related to 786.|
Year 786 (DCCLXXXVI) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar. The denomination 786 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.
- Byzantine Empire
- A council is organized in Constantinople, but is disturbed by soldiers.
- Middle East
- June 11 – A Hasanid Alid uprising in Mecca is crushed by the Abbasids at the Battle of Fakhkh. Idris ibn Abdallah flees to the Maghreb, where he later founds the Idrisid dynasty.
- September 14 – Harun al-Rashid becomes the Abbasid Caliph in Baghdad upon the death of his brother al-Hadi, and appoints Salim Yunisi as the Abbasid governor of Sindh and the Indus Valley. Harun al-Rashid rules until 809.
- Beatus of Liébana, Spanish monk, publishes his Commentary on the Apocalypse.