| Timeline |
| 1922 |
Born 15 August in Berlin |
| 1929 |
Considered a prodigy, starts lessons with his first piano teacher Julius Herford |
| 1937 |
Family moves to U.S.; begins studies at Philadelphia's Curtis Institute of Music. |
| 1940 |
Graduates with honours from Curtis |
| 1953 |
Professor of Composition, University of California |
| 1953 |
Succeeds Arnold Schoenberg as professor of composition at the University of California at Los Angeles |
| 1957 |
Founds the Improvisation Chamber Ensemble |
| 1961 |
Time Cycle receives the New York Music Critics' Circle Award
|
| 1971 |
Appointed Principal Conductor, Brooklyn Philharmonic |
| 1983 |
Elected to the American Academy and Institute of Arts and Letters |
| 1986 |
Conductor-Laureate, Milwaukee Symphony |
| 1989 |
Composer in Residence, Tanglewood Music Center |
| 1991 |
Boston University, Professor of Music |
