900

900 in various calendars
Gregorian calendar	900; CM
Ab urbe condita	1653
Armenian calendar	349; ԹՎ ՅԽԹ
Assyrian calendar	5650
Balinese saka calendar	821–822
Bengali calendar	307
Berber calendar	1850
Buddhist calendar	1444
Burmese calendar	262
Byzantine calendar	6408–6409
Chinese calendar	己未年 (Earth Goat); 3597 or 3390; — to —; 庚申年 (Metal Monkey); 3598 or 3391
Coptic calendar	616–617
Discordian calendar	2066
Ethiopian calendar	892–893
Hebrew calendar	4660–4661
Hindu calendars
- Vikram Samvat	956–957
- Shaka Samvat	821–822
- Kali Yuga	4000–4001
Holocene calendar	10900
Iranian calendar	278–279
Islamic calendar	286–288
Japanese calendar	Shōtai 3; (昌泰３年)
Javanese calendar	798–799
Julian calendar	900; CM
Korean calendar	3233
Minguo calendar	1012 before ROC; 民前1012年
Nanakshahi calendar	−568
Seleucid era	1211/1212 AG
Thai solar calendar	1442–1443
Tibetan calendar	阴土羊年; (female Earth-Goat); 1026 or 645 or −127; — to —; 阳金猴年; (male Iron-Monkey); 1027 or 646 or −126

Millennium:	1st millennium
Centuries:	8th century; 9th century ; 10th century;
Decades:	880s; 890s; 900s ; 910s; 920s;
Years:	897; 898; 899; 900 ; 901; 902; 903;

Year 900 (CM) was a leap year starting on Tuesday (link will display the full calendar) of the Julian calendar.

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By place

Abbasid Caliphate

Spring – Forces under the Transoxianian emir Isma'il ibn Ahmad are victorious at Balkh (Northern Afghanistan) over Amr ibn al-Layth; the latter is captured and sent to Caliph Al-Mu'tadid in Baghdad.^[1] The Samanid Dynasty rules over Khorasan, as well as Transoxiana.^[2] A few months later, the Samanids conquer the Zaydid emirate of Tabaristan. This victory marks the beginning of the dispersion of the local Shi'ites by the new Sunni power.
Arab–Byzantine wars: Emperor Leo VI ("the Wise") begins an offensive against the Abbasid army in Cilicia, Upper Mesopotamia and Armenia. He also continues the war against the Muslims in Sicily and southern Italy.^[3]
The future founder of the Fatimid Caliphate, Abdallah al-Mahdi and his family migrate to North Africa. They claim to be descendants of Fatimah, the daughter of the Islamic prophet Muhammad.
The Qarmatians of al-Bahrayn, under Abu Sa'id al-Jannabi, score a major victory over the Abbasid army led by al-Abbas ibn Amr al-Ghanawi.

Europe

Spring – Atenulf I, Lombard prince of Capua, conquers the Duchy of Benevento. He deposes Duke Radelchis II and unites the two southern Lombard duchies in Mezzogiorno (Southern Italy). The Byzantines offer a strategic alliance to Atenulf who directs a campaign against the Saracens. They have establish themselves on the banks of the Garigliano River. From here, Arab warbands launch frequent raids in Campania.^[4]
February 4 – The 7-year-old Louis IV ("the Child") is proclaimed king of the East Frankish Kingdom at an assembly at Forchheim (Bavaria). Because of his young age, the reins of government are entirely in the hands of others – the Frankish nobles and bishops. The most influential of Louis' councillors are Hatto I, archbishop of Mainz, and Solomon III, bishop of Constance.^[5]
June 8 – Edward the Elder (son of Alfred the Great) is crowned king of England at Kingston upon Thames.^[6]
June 17 – Baldwin II, Count of Flanders has Fulk the Venerable, bishop of Reims, assassinated.^[7]
June 29 – The Venetians repel the Magyar raiders at Rialto.^[8]
Summer – After the death of his wife Zoe Zaoutzaina, the Byzantine emperor Leo VI marries Eudokia Baïana.^[9]
August – Abdallah, son of the Aghlabid emir Ibrahim II, represses a revolt of his Muslim subjects, and then initiates a campaign against the last Byzantine strongholds in Sicily.^[3]
August 13 – Zwentibold, king of Lotharingia, is killed in battle on the Meuse River, while fighting against his rebellious subjects; subsequently they recognize Louis IV as their rightful suzerain - Lotharingia is then converted from a kingdom to a duchy.^[10]
October 12 – Following Magyars raids in Lombardy, king Louis III ("the Blind") is called to Italy by the grandees. He takes Pavia, forcing king Berengar I to flee, and replaces him as King of Italy.^[11]
King Donald II is killed after an 11-year reign. He is succeeded by his cousin Constantine II as king of Scotland;^[12] he will reign for more than 40 years.
Docibilis I of Gaeta and his Saracen mercenaries attack Capua, in vain.^[13]
After the rejection of their alliance proposal by the Bavarians, the Hungarians attack this country, occupying Pannonia and parts of Ostmark, which become part of the Hungarian state.

Asia

April 21 – Namwaran and his children, Lady Angkatan and Bukah, are granted pardon by the Lakan (ruler) of Tondo, as represented by Jayadewa, Lord Minister of Pila, which released them of all their debts as inscribed in the Laguna Copperplate Inscription (Philippines).
Maravarman Rajasimha II, king of Pandya, begins to rule. He is constantly at war with Chola (his overlord) and becomes the last ruler of the first Pandyan Empire (India).^[14]
December 1 – Emperor Zhao Zong is deposed and forced by a group of Tang eunuchs led by Liu Jishu to abdicate the throne to his son, Crown Prince Li Yu (until 901).

Mesoamerica

The Postclassic Period: The Maya civilization that has flourished for about 650 years in upland areas of what later will be called Central America comes to an end as a result either of depleted agricultural resources or warfare between some 40 rival city-states. The great stone pyramids, ball courts and other structures at cities such as Tikal, Copán, and Palenque are abandoned and overgrown with jungle, as will eventually be the sculpture and relief carvings of the Maya, who have developed a calendar based on almost perfect astronomic measurements. Cities such as Chichen Itza, Mayapan and Uxmal in the highlands of the Yucatán Peninsula will continue to flourish.
In Peru the Lambayeque people establish themselves over areas previously developed by the Moche (approximate date).

By topic

Art

c. 900 –1230 – Pueblo Bonito, Chaco Canyon, New Mexico, is built by the Ancestral Pueblo people.

Religion

January – Pope John IX dies after a two year reign. He is succeeded by Benedict IV as the 117th pope of the Catholic Church.^[15]

Commerce

The east coast of Africa is impacted by trade and Arab, Persian and Indian traders mix with the indigenous Bantu. Many of the coastal Bantu adopt Islam, reaching as far south as Sofala (Mozambique).

Exploration

Greenland is discovered by the Norseman Gunnbjörn Ulfsson, sailing from Norway to Iceland: he is blown off course by a storm and comes in sight of some islands off the coast (approximate date).

Medicine

The Persian scientist Muhammad ibn Zakariya al-Razi distinguishes smallpox from measles in the course of his writings. Holding against any sort of orthodoxy, particularly Aristotle's physics, he maintains the conception of an 'absolute' time, regarded by him as "a never-ending flow".

Abū Ja'far al-Khāzin, Persian astronomer (d. 971)
Adaldag, archbishop of Bremen (approximate date)
Berengar II, king of Italy (approximate date)
Berthold, duke of Bavaria (approximate date)
Conrad, bishop of Constance (approximate date)
Fujiwara no Saneyori, Japanese statesman (d. 970)
Gero, archbishop of Cologne (approximate date)
Gero, Frankish nobleman (approximate date)
John of Gorze, Frankish abbot and diplomat (d. 974)
Mord Fiddle, Icelandic farmer and law expert (d. 968)
Nicodemus of Mammola, Italian monk (d. 990)
Ramiro II, king of León (approximate date)
Ramwold, Frankish abbot (approximate date)
Rasso, Frankish military leader (approximate date)
Yang Pu, emperor of Wu (d. 939)

June 17 – Fulk, archbishop of Reims
July 8 – Qatr al-Nada, wife of the Abbasid caliph al-Mu'tadid^[16]
August 13 – Zwentibold, king of Lotharingia (b. 870)
Donald II, king of the Picts (Scotland)^[17]
Dongshan Shouchu, Chinese Zen teacher
Eardulf, bishop of Lindisfarne (approximate date)
Fujiwara no Takafuji, Japanese nobleman (b. 838)
Ibn Abi Asim, Muslim Sunni scholar (b. 822)
John IX, pope of the Catholic Church
Lde-dpal-hkhor-btsan, Indian ruler
Litan, Irish abbot (approximate date)
Liu Chongwang, chancellor of the Tang Dynasty
Li Zhirou, chancellor of the Tang Dynasty
Merfyn ap Rhodri, king of Powys (approximate date)
Muhammad ibn Zayd, emir of Tabaristan (Iran)
Ono no Komachi, Japanese poet (approximate date)
Tadg mac Conchobair, king of Connacht (Ireland)
Wang Tuan, chancellor of the Tang Dynasty
Wulfhere, archbishop of York (approximate date)

[1]
Par Ṭabarī (translated by Franz Rosenthal) (1985). The return of the Caliphate to Baghdad. SUNY Press. ISBN 978-0-87395-876-9.
[2]
René Grousset (1885-1952) (1965) [1938]. L'empire des steppes, Attila, Gengis-Khan, Tamerlan (PDF) (4 ed.). Paris: Payot. Archived (PDF) from the original on October 9, 2022.{{cite book}}: CS1 maint: numeric names: authors list (link)
[3]
Louis Bréhier (1946). Vie et mort de Byzance (PDF). Paris: Albin Michel. p. 596. Archived (PDF) from the original on October 9, 2022.
[4]
Barbara M. Kreutz Before the Normans University of Pennsylvania Press, 1996 ISBN 978-0-8122-1587-8
[5]
Jacques Flach Les Origines de l'ancienne France. Volume 4 Ayer Publishing ISBN 978-0-8337-1147-2
[6]
N. J. Higham, David Hill Edward the Elder, 899-924 Routledge, 2001 ISBN 978-0-415-21497-1
[7]
Heinrich Joseph Wetzer Dictionnaire encyclopédique de la théologie catholique Gaume frères et J. Duprey, 1864
[8]
Enrico Guidoni La ville européenne: formation et signification du quatrième au onzième siècle Editions Mardaga, 1981 ISBN 978-2-87009-133-3
[9]
Theodora Antonopoulou The Homilies of the Emperor Leo VI BRILL, 1997 ISBN 978-90-04-10814-1
[10]
A. Charguéraud Les batards célèbres M. Lévy, 1859
[11]
Charles Albert Cingria La reine Berthe L'Age d'Homme, 1992 ISBN 978-2-8251-0347-0
[12]
Fiona Somerset Fry The history of Scotland Routledge, 1985 ISBN 978-0-415-06601-3
[13]
Caravale, Mario (ed). Dizionario Biografico degli Italiani XL Di Fausto – Donadoni. Rome, 1991.
[14]
N. Jayapalan (2001). History of India. Atlantic Publishers & Distri. ISBN 978-81-7156-928-1.
[15]
Artaud de Montor Histoire des souverains pontifes romains Didot, 1846
[16]
Rosenthal, Franz, ed. (1985). The History of al-Ṭabarī, Volume XXXVIII: The Return of the Caliphate to Baghdad: The Caliphates of al-Muʿtaḍid, al-Muktafī and al-Muqtadir, A.D. 892–915/A.H. 279–302. SUNY Series in Near Eastern Studies. Albany, New York: State University of New York Press. p. 85. ISBN 978-0-87395-876-9.
[17]
Lynch, Michael, ed. (2011). The Oxford companion to Scottish history. Oxford University Press. p. 106. ISBN 9780199693054.

[1] [1]
Par Ṭabarī (translated by Franz Rosenthal) (1985). The return of the Caliphate to Baghdad. SUNY Press. ISBN 978-0-87395-876-9.

[Grousset-2] [2]
René Grousset (1885-1952) (1965) [1938]. L'empire des steppes, Attila, Gengis-Khan, Tamerlan (PDF) (4 ed.). Paris: Payot. Archived (PDF) from the original on October 9, 2022.{{cite book}}: CS1 maint: numeric names: authors list (link)

[Bréhier-3] [3]
Louis Bréhier (1946). Vie et mort de Byzance (PDF). Paris: Albin Michel. p. 596. Archived (PDF) from the original on October 9, 2022.

[4] [4]
Barbara M. Kreutz Before the Normans University of Pennsylvania Press, 1996 ISBN 978-0-8122-1587-8

[Flach-5] [5]
Jacques Flach Les Origines de l'ancienne France. Volume 4 Ayer Publishing ISBN 978-0-8337-1147-2

[6] [6]
N. J. Higham, David Hill Edward the Elder, 899-924 Routledge, 2001 ISBN 978-0-415-21497-1

[7] [7]
Heinrich Joseph Wetzer Dictionnaire encyclopédique de la théologie catholique Gaume frères et J. Duprey, 1864

[8] [8]
Enrico Guidoni La ville européenne: formation et signification du quatrième au onzième siècle Editions Mardaga, 1981 ISBN 978-2-87009-133-3

[9] [9]
Theodora Antonopoulou The Homilies of the Emperor Leo VI BRILL, 1997 ISBN 978-90-04-10814-1

[10] [10]
A. Charguéraud Les batards célèbres M. Lévy, 1859

[11] [11]
Charles Albert Cingria La reine Berthe L'Age d'Homme, 1992 ISBN 978-2-8251-0347-0

[12] [12]
Fiona Somerset Fry The history of Scotland Routledge, 1985 ISBN 978-0-415-06601-3

[13] [13]
Caravale, Mario (ed). Dizionario Biografico degli Italiani XL Di Fausto – Donadoni. Rome, 1991.

[14] [14]
N. Jayapalan (2001). History of India. Atlantic Publishers & Distri. ISBN 978-81-7156-928-1.

[15] [15]
Artaud de Montor Histoire des souverains pontifes romains Didot, 1846

[16] [16]
Rosenthal, Franz, ed. (1985). The History of al-Ṭabarī, Volume XXXVIII: The Return of the Caliphate to Baghdad: The Caliphates of al-Muʿtaḍid, al-Muktafī and al-Muqtadir, A.D. 892–915/A.H. 279–302. SUNY Series in Near Eastern Studies. Albany, New York: State University of New York Press. p. 85. ISBN 978-0-87395-876-9.

[17] [17]
Lynch, Michael, ed. (2011). The Oxford companion to Scottish history. Oxford University Press. p. 106. ISBN 9780199693054.

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[5]

[6]

[7]

[8]

[9]

[10]

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Abbasid Caliphate

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900

By place

Abbasid Caliphate

Europe

Asia

Mesoamerica

By topic

Art

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Exploration

Medicine

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Events

Births

Deaths

References

Gregorian calendar	900 CM
Ab urbe condita	1653
Armenian calendar	349 ԹՎ ՅԽԹ
Assyrian calendar	5650
Balinese saka calendar	821–822
Bengali calendar	307
Berber calendar	1850
Buddhist calendar	1444
Burmese calendar	262
Byzantine calendar	6408–6409
Chinese calendar	己未年 (Earth Goat) 3597 or 3390 — to — 庚申年 (Metal Monkey) 3598 or 3391
Coptic calendar	616–617
Discordian calendar	2066
Ethiopian calendar	892–893
Hebrew calendar	4660–4661
Hindu calendars
- Vikram Samvat	956–957
- Shaka Samvat	821–822
- Kali Yuga	4000–4001
Holocene calendar	10900
Iranian calendar	278–279
Islamic calendar	286–288
Japanese calendar	Shōtai 3 (昌泰３年)
Javanese calendar	798–799
Julian calendar	900 CM
Korean calendar	3233
Minguo calendar	1012 before ROC 民前1012年
Nanakshahi calendar	−568
Seleucid era	1211/1212 AG
Thai solar calendar	1442–1443
Tibetan calendar	阴土羊年 (female Earth-Goat) 1026 or 645 or −127 — to — 阳金猴年 (male Iron-Monkey) 1027 or 646 or −126