903

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

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

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.

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)