This page lists historical and other events on December 21st in Catalonia and the Catalan-speaking countries as well as festivals and a list of births and deaths of well-known Catalans.
1808 - Molins de Rei: After breaking the blockade of Barcelona, General Saint-Cyr beats the Catalan troops lined up along the River Llobregat.
1809 - End of the Siege of Girona, the city surrenders to the French after six months, despite receiving reinforcements from the commandment of Joan Clarós.
1889 - Buffalo Bill arrives in Barcelona with his circus as part of his European tour.
1908 - The "Lliga vegetariana" is founded in Barcelona.
2005 - The first .cat domain starts working.
1651 - València: Tomàs Vicent Tosca i Mascó, Valencian intellectual, mathematician, mapmaker and theologist, as well as creator of the Novatores movement.
1850 - Barcelona: Lluís Domènech i Montaner, Catalan architect, politician and historian.
1874 - Barcelona Josep Maria Sert i Badia, Catalan painter and interior decorator (died 1945).
1942 - Alcoletge, Segrià: Salvador Rué i Alió, footballer for UE Lleida, RCD Espanyol, CA Osasuna and UE Sant Andreu.
1960 - Barcelona: Loquillo, musician.
1979 - Olot: Elisabet Canalias Vila, Catalan mathematician, specialist in calculating interplanetary trajectories.
1981 - Palma: Marta Fernández Farrés, basketball player.
1923 - Castellar del Vallès: Lluís Rodés i Pou, Catalan escolapian.
1925 - Sabadell: Manuel Ribot i Serra, Catalan librarian, archiver, historian, playwright and poet.
1943 - Barcelona: Adrià Gual i Queralt, Catalan playwright, set designer and theatrical promoter (born 1872)
1995 - València: Vicent Badia i Marín, Valencian lawyer, journalist and writer (born 1919).
1997 - Santanyí, Mallorca: Blai Bonet i Rigo, Mallorcan poet and writer (born 1926).
December 21st is the Saints Day of Sant Tomàs and as it is just before Christmas is an excuse for fairs, often centred on poultry, around Catalonia and the Catalan-speaking countries.