1204

1204 (MCCIV) was a leap year starting on Thursday of the Julian calendar, the 1204th year of the Common Era (CE) and Anno Domini (AD) designations, the 204th year of the 2nd millennium, the 4th year of the 13th century, and the 5th year of the 1200s decade. As of the start of 1204, the Gregorian calendar was 7 days ahead of the Julian calendar, which was the dominant calendar of the time.

Millennium:	2nd millennium
Centuries:	12th century – 13th century – 14th century
Decades:	1170s  1180s  1190s  – 1200s –  1210s  1220s  1230s
Years:	1201 1202 1203 – 1204 – 1205 1206 1207

1204 in other calendars

Gregorian calendar	1204 MCCIV
Ab urbe condita	1957
Armenian calendar	653 ԹՎ ՈԾԳ
Assyrian calendar	5954
Balinese saka calendar	1125–1126
Bengali calendar	611
Berber calendar	2154
English Regnal year	5 Joh. 1 – 6 Joh. 1
Buddhist calendar	1748
Burmese calendar	566
Byzantine calendar	6712–6713
Chinese calendar	癸亥年 (Water Pig) 3900 or 3840     — to — 甲子年 (Wood Rat) 3901 or 3841
Coptic calendar	920–921
Discordian calendar	2370
Ethiopian calendar	1196–1197
Hebrew calendar	4964–4965
Hindu calendars
- Vikram Samvat	1260–1261
- Shaka Samvat	1125–1126
- Kali Yuga	4304–4305
Holocene calendar	11204
Igbo calendar	204–205
Iranian calendar	582–583
Islamic calendar	600–601
Japanese calendar	Kennin 4 / Genkyū 1 (元久元年)
Javanese calendar	1112–1113
Julian calendar	1204 MCCIV
Korean calendar	3537
Minguo calendar	708 before ROC 民前708年
Nanakshahi calendar	−264
Thai solar calendar	1746–1747
Tibetan calendar	ཆུ་མོ་ཕག་ལོ་ (female Water-Boar) 1330 or 949 or 177     — to — ཤིང་ཕོ་བྱི་བ་ལོ་ (male Wood-Rat) 1331 or 950 or 178

Events

• February – Byzantine emperor Alexius IV is overthrown in a revolution, and Alexius V is proclaimed emperor.
• April 12 – The Fourth Crusade take Constantinople by storm, and pillage the city for three days. End of the Fourth Crusade.
• May 16 – Baldwin, Count of Flanders is crowned emperor of the Latin Empire a week after his election by the members of the Fourth Crusade.
• Theodore I Lascaris flees to Nicaea after the capture of Constantinople, and establishes the Empire of Nicaea; Byzantine successor states are also established in Epirus and Trebizond.
• Boniface of Montferrat, a leader of the Fourth Crusade, founds the Kingdom of Thessalonica.
• The writings of French theologian Amalric of Bena are condemned by the University of Paris and Pope Innocent III.
• Valdemar II, King of Denmark, is recognized as king in Norway.
• Angers and Normandy are recaptured from England by Philip II of France.
• The Cistercian convent of Port-Royal is established.
• The district of Cham becomes subject to Bavaria.
• Philip of Swabia becomes a subject of Hermann I of Thuringia.
• Beaulieu Abbey founded.
• Jersey enjoys self-government thanks to the division of the Duchy of Normandy.

Births

• Haakon IV, King of Norway (died 1263)
• Heinrich Raspe, Landgraf of Thuringia (died 1247)
• Abû 'Uthmân Sa'îd Hakam al Qurashi, Ra'îs of Manûrqa (died 1282)

Deaths

• January 1 – King Haakon III of Norway
• February 8 – Alexius IV Angelus, Byzantine Emperor
• March 31 – Eleanor of Aquitaine, queen of France and England
• August 11 – King Guttorm of Norway
• August 14 – Minamoto no Yoriie, Japanese shogun (born 1182)
• October 21 – Robert de Beaumont, 4th Earl of Leicester
• December 13 – Maimonides, Spanish rabbi and philosopher (born 1135)
• Ban Kulin – ruler of Bosnia (born 1163)
• Amalric of Bena, French theologian
• William de Burgh, English politician
• Emeric of Hungary (born 1174)
• Isaac II Angelus, Byzantine Emperor
• Suleiman II of Rum
• David Soslani, Prince of Ossetia