This page lists historical and other events on December 31st in Catalonia and the Catalan-speaking countries as well as festivals and a list of births and deaths of well-known Catalans.
1148 - Tortosa (el Baix Ebre): Ramon Berenguer IV culminates the conquest from the Almoràvit caliph al-Muzaffar.
1229 - Palma: Jaume I enters the city after conquering Mallorca from the Almohade sultan Abu-l-Ala Idris al Mamun.
1962 - Palma (Mallorca): Foundational act of the Obra Cultural Balear.
1979 - Barcelona: El Diari Oficial de la Generalitat publishes the Llei Orgànica 4/1979, of December 18th, on the Estatut d'Autonomia de Catalunya.
1378 - la Torreta de Canals, la Costera: Alfons de Borja, Pope of the Catholic Church of Rome with the name of Calixtus III from 1455 to 1458. He was the first Catalan-speaking Pope in history. (died 1458)
1431 - Xàtiva, la Costera: Roderic de Borja, Pope of the Catholic Church of Rome with the name of Alexander VI from 1492 to 1503. He was the second Catalan-speaking Pope in history, after his uncle Calixtus III. (died 1503)
1830 - València, l'Horta: Manuel Danvila y Collado, Valencia lawyer, historian i politician, minister of Governance of Spain in 1892 during the regency of Maria Cristina (died 1906).
1835 - Arenys de Mar (Maresme): Fidel Fita i Colomer, Catalan Jesuit archeologist, epigraphist, philologist and historian.
1866 - Castelló de la Plana, Plana Alta: Salvador Guinot Vilar, writer and mayor of Castelló (died 1944).
1883 - Palamós (Girona) journalist and anarcho-syndicalist propagandist Eusebi Carbó.
1908 - Miravet, Ribera d'Ebre: Roc Llop i Convalia, trades unionist and writer.
1917 - Darnius, Alt Empordà: Josep Maria Gironella i Pous, Catalan writer in the Castilian language (died 2003).
2012 - Barcelona: Moisès Broggi i Vallès, Catalan doctor and pacifist (born 1908).
1987 - Castelló de la Plana (la Plana Alta): Miquel Peris Segarra, Valencian poet (born 1917).
December 31st is the last day of the year and just like anywhere else the day centres on the Catalan New Year's Eve Celebrations.
According to Joan Amades it is the most perverse day after Sant Joan, when the Devil manifests himself in many different forms.