|Ab urbe condita||1977|
|Balinese saka calendar||1145–1146|
|English Regnal year||8 Hen. 3 – 9 Hen. 3|
|Chinese calendar||癸未年 (Water Goat)|
3920 or 3860
— to —
甲申年 (Wood Monkey)
3921 or 3861
|- Vikram Samvat||1280–1281|
|- Shaka Samvat||1145–1146|
|- Kali Yuga||4324–4325|
|Japanese calendar||Jōō 3 / Gennin 1|
|Minguo calendar||688 before ROC|
|Thai solar calendar||1766–1767|
1350 or 969 or 197
— to —
1351 or 970 or 198
|Wikimedia Commons has media related to 1224.|
- June 8 – Maya Long Count calendar: The eleventh b'ak'tun comes to an end, and the twelfth b'ak'tun begins the next day (June 9).
- The Chichimecas capture Tula.
- February – At Carrión, King Ferdinand III of Castile announces his intention to resume the Reconquista against al-Andalus. This same year, the Almohad caliph, Yusuf II al-Mustansir, dies and is succeeded by Abu Muhammad al-Wahid, but in al-Andalus, two competing pretenders also claim their rights to the throne: Abu Muhammad Ibn al-Mansur al-Adil in Seville, and Abu Muhammad abu Abdallah al-Bayyasi in Córdoba, Andalusia. The chronic political instability on the Muslim side allows the Castilian prince to begin his campaign victoriously in October, with the capture of Quesada, Spain.
- The last Muslim inhabitants are expelled from Sicily and Malta.
- Livonian Crusade: The Livonian Brothers of the Sword defeat the Estonians, and reconquer the captured strongholds on the Estonian mainland. With the surrender of the Tartu stronghold, only the islands of Saaremaa and Muhu remain under Estonian control.
- Theodore Komnenos Doukas, ruler of the Despotate of Epirus, captures Thessaloniki, beginning the de facto Byzantine Empire of Thessalonica.
- The University of Naples is founded.
- September 14 (approximate date) – St. Francis of Assisi, while praying on the mountain of Verna during a 40-day fast, has a vision, as a result of which he receives the stigmata. Brother Leo, who is with Francis at the time, leaves a clear and simple account of the event, the first definite account of the phenomenon of stigmata.
- Linehan, Peter (1999). "Chapter 21: Castile, Portugal and Navarre". In Abulafia, David (ed.). The New Cambridge Medieval History c.1198-c.1300. Cambridge University Press. pp. 668–699 . ISBN 0-521-36289-X.
- Robinson, Paschal (1909). "St. Francis of Assisi". The Catholic Encyclopedia. VI. New York: Robert Appleton Company. Retrieved January 21, 2008.