27.9 x 21.6cm, 1pp mimeograph (aniline purple) leaflet for the all-night concert held at the Hardware Poet's Playhouse, NYC, on May 11, 1963 as part of the month-long Yam Festival

The festival was conceived by George Brecht and Robert Watts, who invited Charlotte Moorman to organise a concert of new and experimental music as part of a continuous performance on May 11-12 ('YamDay') featuring about 140 works by 37 artists. The flyer lists the concert performers (as well as Moorman, they included Earl eBrown, Joseph Byrd, Max Neuhaus, and the dancer, Yvonne Rainer), and the compositions she chose (work by John Cage, Morton Feldman, Joseph Byrd, Christian Wolff, Edgard Varèse, and Luciano Berio).