1894 – Born on April 27th in St. Petersburg, Russia. Conductor, composer, musicologist Uncle of composer Sergei Slonimsky.
1923 – Emigrated to the United States and taught at Eastman School of Music.
1931 – Married to Dorothy Adlow on July 30th.
1933 – Conducted debut performances of works by Charles Ives, Edgard Varèse (Ionisation) and Henry Cowell.
1945 – He taught Slavonic Languages and Literatures in Harvard University.
1948 – Was a lecturer in Music at Simmons College.
1958-1991 – Responsible for overhauling Baker’s Biographical Dictionary of Musicians for its fifth edition, maintaining that reference in subsequent editions up to the eighth.
– Was a teacher in Music at University of California at Los Angeles.
1994 – Was the author of the books, Music Since 1900, Music of Latin America, The Road to Music, Thesaurus of Scales and Melodic Patterns, A Thing or Two About Music, Lexicon of Musical Invective, Lectionary of Music, Perfect Pitch: A Life Story and an anthology, Nicolas Slonimsky: The First Hundred Years.
1995 – Died on December 25th in Los Angeles, California.