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Millennium:	1st millennium
Centuries:	9th century 10th century 11th century
Decades:	880s 890s 900s 910s 920s
Years:	900 901 902 903 904 905 906

903 by topic
Leaders
Political entities State leaders Religious leaders
Categories
Births Deaths Establishments

903 in various calendars
Gregorian calendar	903 CMIII
Ab urbe condita	1656
Armenian calendar	352 ԹՎ ՅԾԲ
Assyrian calendar	5653
Balinese saka calendar	824–825
Bengali calendar	310
Berber calendar	1853
Buddhist calendar	1447
Burmese calendar	265
Byzantine calendar	6411–6412
Chinese calendar	壬戌年 (Water Dog) 3600 or 3393 — to — 癸亥年 (Water Pig) 3601 or 3394
Coptic calendar	619–620
Discordian calendar	2069
Ethiopian calendar	895–896
Hebrew calendar	4663–4664
Hindu calendars
- Vikram Samvat	959–960
- Shaka Samvat	824–825
- Kali Yuga	4003–4004
Holocene calendar	10903
Iranian calendar	281–282
Islamic calendar	290–291
Japanese calendar	Engi 3 (延喜３年)
Javanese calendar	801–803
Julian calendar	903 CMIII
Korean calendar	3236
Minguo calendar	1009 before ROC 民前1009年
Nanakshahi calendar	−565
Seleucid era	1214/1215 AG
Thai solar calendar	1445–1446
Tibetan calendar	阳水狗年 (male Water-Dog) 1029 or 648 or −124 — to — 阴水猪年 (female Water-Pig) 1030 or 649 or −123

Year 903 (CMIII) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar.

Events

King Berengar I of Italy proceeds to issue concessions and privileges to the Lombard nobility and monasteries. He grants concessions to Bobbio Abbey in Emilia-Romagna (Northeast Italy).
King Louis IV ("the Child") promulgates the Raffelstetten customs regulations, a legal document for a toll-bridge on the Danube River in Asten (modern Austria).

The Danish Vikings invade Anglesey after being driven out of Dublin (see 902). They fail to gain a foothold in Wales, and sail on to Chester.
A party of Danes under the Viking warlord Ingimundr attack the Welsh in a pitched battle at Maes Ros Meilon, perhaps near Llanfaes.

November 29 – Battle of Hama: Abbasid forces under Muhammad ibn Sulayman al-Katib defeat the Qarmatians near Hama, on the banks of the Orontes River (modern Syria). The Qarmatian army is scattered and pursued by Abbasid troops; Al-Husayn ibn Zikrawayh and other Qarmatian leaders are captured.

July – Pope Benedict IV dies after a 3-year reign. He is succeeded by Leo V as the 118th pope of the Catholic Church. Leo is imprisoned and tortured by Antipope Christopher after a reign of just 1 month. Christopher makes himself the new pope of Rome.

Births

March 6
- Lu Guangqi, Chinese official and chancellor
- Su Jian, Chinese official and chancellor
March 26 – Sugawara no Michizane, Japanese politician and poet (b. 845)
June 10 – Cheng Rui, Chinese warlord
July 27– Abdallah II of Ifriqiya, Aghlabid emir
July – Benedict IV, pope of the Catholic Church^[1]
December 24 – Hedwiga, duchess of Saxony
December 30 – Tian Jun, Chinese warlord (b. 858)
Adalhard of Babenberg, Frankish nobleman
Moses Bar-Kepha, Syriac bishop and writer
Théodrate of Troyes, Frankish queen (b. 868)
Zhu Yanshou, Chinese governor (b. 870)