27 March 1976,
Within 24 hours in Basque, the Popular Radios of San Sebastian, Loiola, Pamplona and Bilbao carried out a radio program in Basque for twenty-four hours, with a loss left by Francoist laws. On the same day, at the Velódromo de San Sebastian, there was a great event of Basque singers and singers, with the participation of 11,000 people. José Luis Zumeta designed the poster “24 hours in Basque”.
It was an important demonstration of strength for the Basque movement. The money raised at the festival was given to Euskaltzaindia.