On Saturday May 12, 2012, the Grenoble-Accordéons association celebrated its 20th anniversary at the Olivier Messiaen room in Grenoble. This event was organized in the form of a festival called "Festiv'Acc". On this occasion, we invited local artists, knowing that our philosophy was to keep as a common thread the accordion, which had to be present for each of the invited artists. This challenge was met, and thus the public was able to discover the accordion in all its diversity. A large audience attended this evening, since we had a full house. Before leaving, all the spectators and the artists shared the birthday cakes and toast them in a good atmosphere, with the feeling of having had a good evening.