920

920 in variouscalendars
Gregorian calendar	920; CMXX
Ab urbe condita	1673
Armenian calendar	369; ԹՎ ՅԿԹ
Assyrian calendar	5670
Balinese saka calendar	841–842
Bengali calendar	327
Berber calendar	1870
Buddhist calendar	1464
Burmese calendar	282
Byzantine calendar	6428–6429
Chinese calendar	Kỷ MãoNăm (EarthRabbit); 3617 or 3410; — to —; Canh Thìn năm (MetalDragon); 3618 or 3411
Coptic calendar	636–637
Discordian calendar	2086
Ethiopian calendar	912–913
Hebrew calendar	4680–4681
Hindu calendars
-Vikram Samvat	976–977
-Shaka Samvat	841–842
-Kali Yuga	4020–4021
Holocene calendar	10920
Iranian calendar	298–299
Islamic calendar	307–308
Japanese calendar	Engi20; ( duyên hỉ ２０ năm )
Javanese calendar	819–820
Julian calendar	920; CMXX
Korean calendar	3253
Minguo calendar	992 beforeROC; Dân trước 992 năm
Nanakshahi calendar	−548
Seleucid era	1231/1232AG
Thai solar calendar	1462–1463
Tibetan calendar	Âm thổ thỏ năm; (female Earth-Rabbit); 1046 or 665 or −107; — to —; Dương kim long năm; (male Iron-Dragon); 1047 or 666 or −106

Millennium:	1st millennium
Centuries:	9th century; 10th century; 11th century;
Decades:	900s; 910s; 920s; 930s; 940s;
Years:	917; 918; 919; 920; 921; 922; 923;

Year920(CMXX) was aleap year starting on Saturday(link will display the full calendar) of theJulian calendar.

Events

December 17–Romanos Ihas himself crowned co-emperor of theByzantine Empire.He shares thethronewith the 15-year-oldConstantine VII(his son-in-law), and constructs an alternative palace atConstantinoplewith an adjoining monastery near theGreat Palace.Though Constantine retains his formal position as first on theprotocollist, Romanos becomes sole ruler.^[1]

The nobles ofLotharingiaunderGilbert,duke ofLorraine,revolt against KingCharles III( "the Simple" ). They recognize KingHenry I( "the Fowler" ) as their sovereign. Charles invades Lotharingia as far asPfeddersheim(nearWorms), but retreats when he learns that Henry is mobilizing an army to attack theWest Frankish Kingdom.^[2]
Henry I conquersUtrecht(modern-dayNetherlands), which has been in possession of theVikingsfor 70 years.Balderic,bishop ofUtrecht,moves his seat back fromDeventerto Utrecht (approximate date).

High-ReeveEaldred I,ruler of the former kingdom ofBernicia(Northumbria), and his brother Uhtred, submit to the overlordship of KingEdward the Elder(approximate date).
TheWelshrulerHywel Dda( "the Good" ) mergesDyfedandSeisyllwg,establishing a new kingdom known asDeheubarth.

July 26— At theBattle of Valdejunquera,the Muslim forces of the EmirAbd-ar-Rahman IIIofCórdoba,defeat the Christian armies of KingOrdoño II of Leónand KingSancho I of Pamplona.The decisive battle at the Val de Junquera takes place following the Emir's pre-emptive strike and his invasion of the upperDourovalley and the capture ofOsma.The Arab army proceeds on to the upperEbro,restoring and replenishingUmayyadgarrisons in the region.^[3]

EmperorTaizuof theKhitan Empireorders the adoption of a written script by theKhitan,resulting in the creation of Khitan "Large Script."

^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?"Weather67(3): 76-82doi:10.1002/wea.835March 2012.