|Ab urbe condita||1577|
|Balinese saka calendar||745–746|
|Chinese calendar||癸卯年 (Water Rabbit)|
3520 or 3460
— to —
甲辰年 (Wood Dragon)
3521 or 3461
|- Vikram Samvat||880–881|
|- Shaka Samvat||745–746|
|- Kali Yuga||3924–3925|
|Japanese calendar||Kōnin 15 / Tenchō 1|
|Minguo calendar||1088 before ROC|
|Seleucid era||1135/1136 AG|
|Thai solar calendar||1366–1367|
950 or 569 or −203
— to —
951 or 570 or −202
- Battle of Roncevaux Pass: The Basques and Banu Qasi defeat a Frankish expedition, led by Counts Aznar and Ebles, in the Pyrenees.
- Iñigo Arista revolts against the Frankish Empire, and establishes the Kingdom of Pamplona, with the support of the Caliphate of Córdoba.
- November 11 – The Constitutio Romana establishes the authority of the Holy Roman Emperors over the papacy of Rome.
- Vikings raid Bangor (modern Wales) for the second time, and plunder the bishopric (approximate date).
- March 3 – Juun Tsak-Took and Ti-Chaak become the co-rulers of the Mayan city state of Machaquila in Guatemala after the death of Sihyaj K'in Ich’aak II, and reign until Juun's death in 840.
- February 11 – Paschal I, pope of the Catholic Church
- March 5 – Suppo I, Frankish nobleman
- August 5 – Heizei, emperor of Japan (b. 773)
- Adelard, duke of Spoleto (Italy)
- Han Yu, Chinese philosopher and poet (b. 768)
- Mauring, Frankish nobleman
- Mu Zong, emperor of the Tang Dynasty (b. 795)
- Óengus of Tallaght, Irish bishop
- Ruthmael, Irish abbot and bishop
- Sayyida Nafisa, Arab female scholar (b. 762)
- Wetti of Reichenau, German scholar
- Zhang Hongjing, Chinese chancellor (b. 760)