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|Ab urbe condita||1673|
|Balinese saka calendar||841–842|
|Chinese calendar||己卯年 (Earth Rabbit)
3616 or 3556
— to —
庚辰年 (Metal Dragon)
3617 or 3557
|- Vikram Samvat||976–977|
|- Shaka Samvat||841–842|
|- Kali Yuga||4020–4021|
|Japanese calendar||Engi 20
|Minguo calendar||992 before ROC
|Seleucid era||1231/1232 AG|
|Thai solar calendar||1462–1463|
1046 or 665 or −107
— to —
1047 or 666 or −106
|Wikimedia Commons has media related to 920.|
- December 17 – Romanos I has himself crowned co-emperor of the Byzantine Empire. He shares the throne with the 15-year-old Constantine VII (his son-in-law), and constructs an alternative palace at Constantinople with a adjoining monastery near the Great Palace. Though Constantine retain his formal position as first on the protocol list, Romanos becomes the sole ruler.
- The nobles of Lotharingia under Gilbert, duke of Lorraine, revolt against King Charles III (the Simple). They recognize King Henry I (the Fowler) as their sovereign. Charles invades Lotharingia as far as Pfeddersheim (near Worms), but retreats when he learns that Henry is mobilishing an army to attack the West Frankish Kingdom.
- Henry I conquers Utrecht (modern-day Netherlands), which has been in possession of the Vikings for 70 years. Balderic, bishop of Utrecht, moves his seat back from Deventer to Utrecht (approximate date).
- High-Reeve Ealdred I, ruler of the former kingdom of Bernicia (Northumbria), and his brother Uhtred, submit to the overlordship of King Edward the Elder (approximate date).
- The Welsh ruler Hywel Dda (the Good) merges Dyfed and Seisyllwg, establishing a new kingdom known as Deheubarth.
- Summer – Abd al-Rahman III, emir of Córdoba, launches a pre-emptive strike against the Kingdom of León. He personal leads an Arab army and invades the territory in the upper Duero valley, taking Osma, before defeating the hastily gathered forces of King Ordoño II and his ally Sancho I. Two Leonese bishops are captured in the rout. The Arab army proceed on to the upper Ebro, restoring and replenishing Umayyad garrisons in the region.
- Emperor Taizu of the Khitan Empire orders the adoption of a written script by the Khitan, resulting in the creation of Khitan "Large Script."
- Dunash ben Labrat, Spanish Jewish commentator (d. 990)
- Fujiwara no Morotada, Japanese statesman (d. 969)
- Gao Baorong, king of Nanping (Ten Kingdoms) (d. 960)
- Guntram the Rich, founder of the House of Habsburg (d. 973)
- Haakon I (the Good), king of Norway (approximate date)
- Hugh of Vermandois, Frankish archbishop (d. 962)
- Li Jingsui, prince of Southern Tang (d. 958)
- Liu Bin, emperor of Southern Han (d. 943)
- Liu Sheng, emperor of Southern Han (d. 958)
- Liutprand of Cremona, Lombard bishop (d. 972)
- Louis IV, king of the West Frankish Kingdom (or 921)
- Megingoz, count of Guelders (approximate date)
- Menahem ben Saruq, Spanish Jewish philologist (d. 970)
- Minamoto no Masanobu, Japanese nobleman (d. 993)
- Miró III, count of Cerdanya and Besalú (d. 984)
- Oliba Cabreta, Frankish nobleman (approximate date)
- Ratna Pala, king of Kamarupa (India) (d. 960)
- Reginar III, Frankish nobleman (approximate date)
- Abd-Allah Mikali, Abbasid governor
- Abu Sa'id al-Janadi, Arab scholar
- Æthelweard, son of Alfred the Great (or 922)
- Ahmad ibn Sahl, Samanid governor
- Brahma Pala, king of Kamarupa
- Georgios I, ruler of Makuria (Egypt)
- Harumichi no Tsuraki, Japanese poet
- Raymond I, count of Pallars and Ribagorza (Spain)
- Stephen of Liège, Frankish bishop
- Yang Longyan, king of Wu (b. 897)
- Timothy Reuter (1999). The New Cambridge Medieval History: Volume III, p. 563. ISBN 978-0-521-36447-8.
- Timothy Reuter (1999). The New Cambridge Medieval History: Volume III, p. 314. ISBN 978-0-521-36447-8.
- Timothy Reuter (1999). The New Cambridge Medieval History: Volume III, p. 675. ISBN 978-0-521-36447-8.
- Domínguez-Castro, Fernando; Vaquero, José Manuel; Marín, Manuela; Gallego, María Cruz; García-Herrera, Ricardo. "How useful could Arabic documentary sources be for reconstructing past climate?" Weather 67(3): 76-82 doi:10.1002/wea.835 march 2012.