Night on Bald Mountain or Night on Bare Mountain is a piece of music (tone poem) for orchestra by Modest Mussorgsky. He completed it in 1867. It was first performed in 1886 in a version by Rimsky-Korsakov after Mussorgsky's 1881 death. The music depicts a witches' Sabbath on St. John's Night. The music was used in Walt Disney's animated movie, "Fantasia" in 1940. 