This simple event, little by little, gained the approval of the people of Pamplona. Sometime in the 1930s, a neighbor asked if he could light the first rocket's fuse. In 1939 Joaquin Ilundain, of Pamplona, lighted the fuse announcing Sanfermines and repeated the feat the next year as first lieutenant-mayor.
In 1941 Ilundain suggested to the Town Hall, presided then by Jose Garran Mosso, that the first rocket be shot up from a balcony of this institution, beginning in this way a custom that soon would, along with the running of the bulls, be universally representative of the fiesta of Sanfermin. This ceremony was not even suspended in 1952 when construction work on the actual Town Hall meant that the rocket had to be fired from the balcony of a temporary Town Hall, located in the Art and Music Schools in the Plaza de ]a República Argentina - today known as the Plaza del Vínculo.
Lighting the fuse, which is a matter of pride for anyone from Pamplona, has always fallen to persons linked in some way to the town government, with the exception of Manuel Fraga Iribarne, then minister of Informacion y Turismo (1964).