 Like the term 20th-century classical music, "21st-century classical music" is defined entirely by the calendar and does not refer to a historical style period in music—in the sense that Baroque and Romantic do—but rather to all art music produced since the year 2000.Musicologists generally say that we are in the contemporary music period—a term which covers art music written from around 1975 or 1945, depending on the historian's perspective.During the 20th century, composers started drawing on an ever wider range of sources for inspiration and developed a wide variety of techniques.