This is a list of composers of 20th-century classical music, sortable by name, year of birth, year of death, nationality, notable works, and remarks. It includes only composers of significant fame and importance. The style of the composer’s music is given where possible, bearing in mind that some defy simple classification. Names are listed first by year of birth, then in alphabetical order within each year.
Source: https://en.wikipedia.org/wiki/List_of_20th-century_classical_composers