1204

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	阴水猪年; (female Water-Pig); 1330 or 949 or 177; — to —; 阳木鼠年; (male Wood-Rat); 1331 or 950 or 178

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 (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.

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.