This evening on Sunday October 27th is dedicated to 20 years of book publishing house Maťa aka 16th Green rock tulip party. Between all the bands, which will perform are for instance legendary czech underground band The Plastic People of the Universe, Zuby nehty, Našrot, Ivan Hlas, A bude hůř, Jiří Dědeček, Mnichovo smradiště and Sbor břežanských kastrátů.