Year 1327 (MCCCXXVII) was a common year starting on Thursday of the Julian calendar.
January 13 – In Spain, Marinid Prince Uthman ibn Abi al-Ula, who started an uprising the year before against the Emirate of Granada and its ruler Muhammad IV, arrives at Almería and proceeds to enlist Abu Abdallah Muhammad ibn Abi Sa'id, Muhammad IV's uncle, to be installed as the new Emir, with the name al-Qa'im bi-amr Allah.
January 20 – Imprisoned in Warwickshire, King Edward II of England is forced to abdicate by his estranged wife, Queen Isabella, and her lover, Roger Mortimer.
January 25 – The 14-year-old Crown Prince, Edward, is proclaimed King of England in London, with his mother Isabella serving as his regent.
February 1 – The coronation of King Edward III as ruler of England takes place at Westminster Abbey with the approval of the English Parliament. Walter Reynolds, Archbishop of Canterbury, places the crown upon the new King.
February 5 (1st waning of Kason 684 ME, Burmese calendar) – In Burma (modern Myanmar), Tarabya I becomes the new King of Sagaing, located in northern Myanmar on the Irrawaddy River with a capital in the city of Sagaing. Tarabya succeeds his brother, upon the death of his brother, King Saw Yun, despite the fact that Saw Yun has an heir, Prince Kyaswa.
February 8 – At Opava (in the modern-day Czech Republic), the Polish Silesian noble Casimir I, Duke of Cieszyn swears homage to King John of Bohemia, "the Blind". In return, Casimir is granted Oświęcim (Auschwitz) as a fiefdom on February 23.
King Charles I of Hungary and King John of Bohemia sign an alliance agreement at Nagyszombat in Bohemia (modern Trnava in the Republic of Slovakia), to proceed against the Austrian Habsburgs who occupy Pressburg (modern Bratislava, capital of Slovakia).
In Bavaria, a large fire breaks out in Munich and is not brought under control for two days. One-third of the buildings in the city are destroyed.
February 19 – Other Silesian nobles follow the example of Casimir of Cieszyn at Opava and swear homage to King John of Bohemia, including the Piast nobles Leszek of Racibórz, Siemowit of Bytom and George of Bytom.
March 31 – King Charles IV of France makes a peace treaty with England. He returns Aquitaine and Gascony to English rule. Charles receives 50,000 livres. The territories of Limousin, Quercy and Périgord county come under control of France.
April 4 – In the civil war in Granada, Prince Uthman ibn Abi al-Ula captures the fortress of Laujar de Andarax (in the modern-day Almeria province of Spain).
April 5 – Edward II is moved to Berkeley Castle in Gloucestershire. He is kept under the custody of Roger Mortimer's son-in-law, Thomas Berkeley and John Maltravers, who are given £5 a day to look after him. Despite records showing luxury goods being bought for him, Edward is possibly mistreated by his captors.
April 6 (Good Friday) – Francesco Petrarca, Italian scholar and poet, sees a woman he names Laura (possibly Laura de Noves) in the church of Sainte-Claire d'Avignon, which awakes in him a lasting passion. He writes a series of sonnets and other poems in Italian dedicated to her, which are collected into Il Canzoniere, an influential model for Renaissance culture.
May 31 – In Milan, Louis IV ("Ludwig the Bavarian"), King of the Romans, becomes the first King of Italy since 1313, when Henry VII, Holy Roman Emperor died. Louis is enthroned as King Ludovico IV, the third king with that name (Louis the Blind had ruled as Ludovico III from 900 to 905).
June 21 – Queen Ingeborg of Norway marries the Danish nobleman Canute Porse the Elder, but is deposed from political power in Norway.
July 4 – During a banquet given by Galeazzo I Visconti in Milan, an attempt is apparently made to poison the guest of honor, Louis IV, newly crowned as King of Italy. Galeazzo's brother, Stefano Visconti, becomes ill after tasting food and drink intended for Louis and dies suddenly at home. Stefano's brothers Galeazzo, Giovanni, and Luchino, along with his nephew Azzone Visconti, are all imprisoned on orders of the Holy Roman Emperor based on accusations of a fourth brother, Marco Visconti.
August 25 – Demasq Kaja, Viceroy of Azerbaijan and of Iraq in the Ilkhanate, the Mongol Empire's area of control in the Middle East, is killed in Soltaniyeh after trying to escape arrest on orders of the Ilkhan, Abu Sa'id Bahadur Khan. Abu Sa'id had concluded that Demasq's father, Amir Chūpān, was attempting to take over the Ilkhanate.