Opened at the Colonial Theatre on February 25, 1973. Closed August 3, 1974 after 601 performances — 17 months. A Little Night Music is a musical with music and lyrics by Stephen Sondheim and book by Hugh Wheeler. Inspired by the 1955 Ingmar Bergman film Smiles of a Summer Night, it involves the romantic lives of several couples. Its title is a literal English translation of the German name for Mozart's Serenade No. 13, K. 525, Eine kleine Nachtmusik. The musical includes the popular song "Send In the Clowns", written for Glynis Johns. Wiki link