904

This article is about the year 904. For the number, see 904 (number).

Millennium:	1st millennium
Centuries:	9th century – 10th century – 11th century
Decades:	870s  880s  890s  – 900s –  910s  920s  930s
Years:	901 902 903 – 904 – 905 906 907

904 by topic

Politics

State leaders – Sovereign states

Birth and death categories

Births – Deaths

Establishment and disestablishment categories

Establishments – Disestablishments

904 in other calendars

Gregorian calendar	904 CMIV
Ab urbe condita	1657
Armenian calendar	353 ԹՎ ՅԾԳ
Assyrian calendar	5654
Bengali calendar	311
Berber calendar	1854
Buddhist calendar	1448
Burmese calendar	266
Byzantine calendar	6412–6413
Chinese calendar	癸亥年 (Water Pig) 3600 or 3540     — to — 甲子年 (Wood Rat) 3601 or 3541
Coptic calendar	620–621
Discordian calendar	2070
Ethiopian calendar	896–897
Hebrew calendar	4664–4665
Hindu calendars
- Vikram Samvat	960–961
- Shaka Samvat	826–827
- Kali Yuga	4005–4006
Holocene calendar	10904
Iranian calendar	282–283
Islamic calendar	291–292
Japanese calendar	Engi 4 (延喜４年)
Julian calendar	904 CMIV
Korean calendar	3237
Minguo calendar	1008 before ROC 民前1008年
Seleucid era	1215/1216 AG
Thai solar calendar	1446–1447

Year 904 (CMIV) was a leap year starting on Sunday (link will display the full calendar) of the Julian calendar.

Events

By place

Asia

• The Byzantines under Andronikos Doukas defeat the Arab garrisons of Mopsuestia and Tarsos near Marash.
• Chang'an, the capital of Tang dynasty China and the largest city in the ancient world, is destroyed.
• September 22 – The warlord Zhu Quanzhong kills Emperor Zhaozong, the penultimate emperor of Tang dynasty China, after seizing control of the imperial government.
• The Abbasids invade the Tulunid emirate of Egypt.

Europe

• July 29 – Sack of Thessalonica: Saracen raiders under Leo of Tripoli sack Thessalonica, the Byzantine Empire's second-largest city, after a short siege, and plunder it for a week.
• In Portugal, for the third time in less than 30 years, the Christians take control of Coimbra, this time for almost a century.
• July 29 – The Bavarians kill an important leader (gyula or horka) of the Hungarian tribal confederation, Kurszán in an ambush.

By topic

Religion

• January 29 – Pope Sergius III succeeds Pope Leo V and the deposed Antipope Christopher (both of whom are murdered or exiled) as the 119th pope; he begins the era of the Pornocracy.

Births

• June 30 – Guo Wei, posthumously known as Emperor Taizu of Later Zhou

Deaths

• January – Antipope Christopher the antipope
• 13 February – Yahya ibn Zikrawayh, Qarmatian leader
• October – Al-Qasim ibn Ubayd Allah, Abbasid vizier
• Zhaozong, 19th emperor of the Tang dynasty
• Erenfried I of Maasgau, Count of Bliesgau, Keldachgau and Bonngau and Count of Charmois
• Du Xunhe, Chinese poet
• Llywarch ap Hyfaidd. King of Dyfed, Wales
• Ki no Tomonori, early Heian waka poet
• Kurszán, partner ruler of the Magyars beside Árpád
• Harun ibn Khumarawayh, fourth Emir of the Tulunids
• Yahya ibn Al-Qassim, eighth Idrisid ruler and sultan of Morocco
• Zhang Jun, Tang dynasty chancellor
• Lady Zhang, wife of Zhu Quanzhong