The festival of San Prudencio, in the city of Vitoria-Gasteiz, Álava, Spain, is held around the saint's feast day (28 April).

The festival begins on 27 April in Plaza de la Diputación, where a stage is prepared for the traditional Basque dance groups.

Prudencio is believed to have been born in Armentia and died in El Burgo de Osma, Soria on 28 April; the year is unknown.

Prudencio was reportedly canonized on 24 April 759 at the monastery of San Millán de la Cogolla.

Built in the late 12th century and remodeled during the 18th, it was listed as a Bien de Interés Cultural on 4 June 1931.

San Prudencio's Zortzikoa: Buenas tortillas de perretxikos Con huevos frescos y buen jamón Que son los útiles más convenientes Para este día de animación Arriba todos los alaveses De alma sencilla y buen corazón Celebren fiestas a San Prudencio A San Prudencio que es su patrón