A New Day is a cello concerto written in 2021 by the American composer Joan Tower. The work was commissioned for the cellist Alisa Weilerstein by the Colorado Music Festival, the Cleveland Orchestra, the Detroit Symphony Orchestra, and the National Symphony Orchestra. It was given its world premiere by Weilerstein and the Colorado Music Festival Orchestra conducted by Peter Oundjian at the Colorado Chautauqua on July 25, 2021.[1]