Launched in 1931, the Metropolitan Opera’s Saturday matinee broadcasts are the longest-running continuous classical music program in radio history. Hear the world’s greatest operatic performances, both live and from the company’s unparalleled archive. The Metropolitan Opera International Radio Network airs the live performances on Saturday afternoons while the Met is in season, typically beginning the first Saturday in December, and totaling just over 20 weekly performances through early May.

http://www.metoperafamily.org/metopera/broadcast/hd_events_template.aspx?id=16946