|Ab urbe condita||1575|
|Balinese saka calendar||743–744|
|Chinese calendar||辛丑年 (Metal Ox)|
3518 or 3458
— to —
壬寅年 (Water Tiger)
3519 or 3459
|- Vikram Samvat||878–879|
|- Shaka Samvat||743–744|
|- Kali Yuga||3922–3923|
|Japanese calendar||Kōnin 13|
|Minguo calendar||1090 before ROC|
|Seleucid era||1133/1134 AG|
|Thai solar calendar||1364–1365|
948 or 567 or −205
— to —
949 or 568 or −204
- Byzantine general and usurper Thomas the Slav continues his revolt against Emperor Michael II. He unsuccessfully besieges Constantinople, while his fleet is destroyed by Michael's fleet, using Greek fire.
- Battle of Kedouktos (near Heraclea): Khan Omurtag of Bulgaria sends a relief army, and defeats the Byzantine rebels. 
- Emperor Louis I performs public penance for causing his nephew Bernard's death 4 years earlier, at his palace of Attigny (Ardennes), before Pope Paschal I, and the Frankish nobles (this to restore harmony and re-establish his authority).
- The earliest known mention of the Serbs, in Einhard's Royal Frankish Annals.
- King Ceolwulf I of Mercia invades Powys (Wales), but is beaten back by King Cyngen. However, Ceolwulf does destroy the fortress of Deganwy, and later takes the kingdom under his control (approximate date).
- Al-Hakam I, Umayyad emir of Córdoba, dies after a 26-year reign. He is succeeded by his son Abd al-Rahman II, who begins a military campaign against King Alfonso II of Asturias in Al-Andalus (modern Spain).
- Kim Heon-chang launches a short-lived rebellion in Silla, which gains control over much of the southern and western Korean Peninsula.
- February 6 – Ukit Took becomes the last ruler (ajaw) of the Mayan city-state Copán (modern Guatemala). After his death in 830, the kingdom is wiped out, most likely from an epidemic.
- June 26 – Saichō, Japanese Buddhist monk (b. 767)
- Al-Hakam I, Muslim emir of Córdoba (b. 771)
- Al-Waqidi, Muslim historian and biographer
- Denebeorht, bishop of Worcester
- Eigil of Fulda, Bavarian abbot
- Gregory Pterotos, Byzantine general (strategos)
- Kim Heon-chang, Silla aristocrat and rebel leader
- Li Yijian, chancellor of the Tang Dynasty (b. 756)
- Tahir ibn Husayn, founder of the Tahirid Dynasty
- Tian Bu, general of the Tang Dynasty (b. 785)
- Winiges, duke of Spoleto (Italy)
- Bury, John Bagnell (1912). A History of the Eastern Roman Empire from the Fall of Irene to the Accession of Basil I (A.D. 802–867). London: Macmillan and Company. pp. 101–102. OCLC 458995052.
- Lemerle, Paul (1965). "Thomas le Slave". Travaux et mémoires 1 (in French). Paris: Centre de recherche d'histoire et civilisation de Byzance. pp. 279–281, 291. OCLC 457007063.
- Treadgold, Warren (1988). The Byzantine Revival, 780–842. Stanford, California: Stanford University Press. p. 240. ISBN 978-0-8047-1462-4.
- McKitterick, Rosamond, The New Cambridge History, 700-900.