February 26– The Böse Fasnacht, a riot in the Swiss city of Basel, breaks out during a tournament at a carnival and numerous people are killed, including several of the soldiers of the Duke of Austria, Leopold III. The city council arrests and executes 12 perpetrators, but Duke Leopold proceeds with placing the city under stricter control.
June 7– The day before his death, Prince Edward of Wales, heir to the English throne and known as "The Black Prince" summons his father, King Edward III, and brother, John of Gaunt, and makes them swear to uphold the claim to the throne of his son Richard. Edward is the first "English" Prince of Wales (as opposed to Welsh) not to become King of England.
September 13– Pope Gregory XI departs from Avignon in France to begin his journey to Rome in an attempt to make peace between the Republic of Florence and the Papal States.
September– John of Gaunt summons religious reformer John Wyclif to appear before the Royal Council.
October–December
October 7– King Edward III of England makes out his Last Will and Testament, formally declaring his grandson Prince Richard as his successor, describing him as "Next we give and leave to our future heir, on whom may God confer his saving Grace, Richard, namely the son of Edward of honoured memory lately prince of Wales our firstborn son".
October 12–Pope Gregory XI and several cardinals of the Roman Catholic Church depart on a ship from the port of Marseille in France, and encounter severe storms before arriving in Genoa. He will finally arrive in Rome on January 17, 1377.
October 28– Pope Gregory XI and his cardinals sail out of the Bay of Genoa toward Corneto. Several cardinals become seriously ill, including Cardinal de Narbonne, who disembarks at Pisa and dies there.
December 25– John of Gaunt presents his nephew, Richard of Bordeaux, to the feudatories of the realm and swears to uphold Richard's right to succeed Edward III.
↑Autrand, Françoise (1994). Charles V: le Sage. Fayard. pp.617–618. ISBN978-2-213-02769-2.
↑Williman, Daniel; Corsano, Karen (2002). The Interdict of Florence (31 March 1376): New Documents. Rivista Di Storia Della Chiesa in Italia. Vol.56. pp.427–481.
↑"A Citizen Saint". The Irish Monthly Magazine. McGlashan & Gill: 193. December 1874.
↑Chimalpahin Cuauhtlehuanitzin; Domingo Francisco de San Antón Muñón (1997). "Mexican History or Chronicle". Codex Chimalpahin: society and politics in Mexico Tenochtitlan, Tlatelolco, Texcoco, Culhuacan, and other Nahua altepetl in central Mexico: the Nahuatl and Spanish annals and accounts collected by don Domingo de San Antón Muñón Chimalpahin Quauhtlehuanitzin. Translated by Arthur J. O. Anderson; Susan Schroeder. Norman OK: University of Oklahoma Press. pp.25–177. ISBN0-8061-2921-2.
↑Dek, A.W.E. (1970). Genealogie van het Vorstenhuis Nassau (in Dutch). Zaltbommel: Europese Bibliotheek. p.66.
↑De Roo van Alderwerelt, J.K.H. (1960). "De graven van Vianden. Bijdrage tot een genealogie van het geslacht der graven van Vianden tot de vererving van het graafschap in het Nassause huis". De Nederlandsche Leeuw, Maandblad van het Koninklijk Nederlandsch Genootschap voor Geslacht- en Wapenkunde (in Dutch). 1960 (6): 196.