|Ab urbe condita||1989|
|Balinese saka calendar||1157–1158|
|English Regnal year||20 Hen. 3 – 21 Hen. 3|
|Chinese calendar||乙未年 (Wood Goat)|
3932 or 3872
— to —
丙申年 (Fire Monkey)
3933 or 3873
|- Vikram Samvat||1292–1293|
|- Shaka Samvat||1157–1158|
|- Kali Yuga||4336–4337|
|Japanese calendar||Katei 2|
|Minguo calendar||676 before ROC|
|Thai solar calendar||1778–1779|
1362 or 981 or 209
— to —
1363 or 982 or 210
|Wikimedia Commons has media related to 1236.|
- May 1 – Razia Sultana is the designated successor of her father, to the Delhi Sultanate.
- Only four of 58 districts in Sichuan, China, are captured from the Southern Song by the Mongols, under Ögedei Khan.
- Kalinga Magha, founder of the Aryacakravarti Dynasty, is expelled from Polonnaruwa to Jaffna, the capital of the Jaffna Kingdom.
- January 14 – Henry III of England marries Eleanor of Provence.
- June 29 – Córdoba, Andalusia, is taken by Castilian troops from the emir Ibn Hud, as part of the Reconquista of the Iberian Peninsula. The Great Mosque here becomes wholly a Roman Catholic cathedral.
- September 22 – Battle of Saule: The Lithuanians and Semigallians defeat the Livonian Brothers of the Sword.
- Volga Bulgaria is conquered by the Mongol Batu Khan.
- A tournament at Tickhill in England turns into a battle between northerners and southerners, but peace is restored by the papal legate.
- May 6 – Roger of Wendover, Benedictine monk and chronicler of St. Albans Abbey dies. His chronicle is continued by Matthew Paris.
- A drought causes the harvest to fail, and leads to one of the great famines of the century in Europe.
- June 6 – Wen Tianxiang, Chinese prime minister (d. 1283)
- June 8 – Violant of Aragon, queen consort of Castile and Leon (d. 1301)
- January 14 – Saint Sava of Serbia (b. 1175)
- July 29 – Ingeborg of Denmark, Queen of France (b. 1175)
- May 6 – Roger of Wendover, English Benedictine monk and chronicler
- November 26 – Al-Aziz Muhammad ibn Ghazi, Ayyubid emir of Aleppo (b. 1216)
- John of Ibelin, the Old Lord of Beirut (b. c. 1179)
- Gilbert of Dunkeld, Bishop of Dunkeld