The World of Gustav Mahler, August 19 August 13, 2020 The World of Gustav Mahler, August 19 On Wednesday, August 19, 7-9:30 pm, Marilyn McCoy, Adjunct Assistant Professor, joins radio producer Aaron Cohen and host Naomi Lewin for an online class at the 92nd Street Y, "The World of Gustav Mahler," exploring the composer's symphonies.