Both "Si è spento il sole" and "La mezza luna" were included in the album A New Orleans, released the following year.

[1] The lyrics were written by Luciano Beretta and Miki Del Prete, while the music was composed by Ezio Leoni and Alessandro Celentano, the singer's brother, who used the pseudonym Adricel.

[2] The song is a tango arranged by Giulio Libano, emphasizing its dramatic nature with strings, which are used from the very first bars of the introduction.

It stayed within the top three spots on the chart from 3 November until 1 February of the following year for 13 consecutive weeks.

[3] In 1963, the song was reinterpreted by Torquato e i Quattro and by the Spanish group Los Catinos with the title Se oculta el sol.