General Manager Charles MacKay said an Aug. 18 performance was scheduled because of a heavy demand for tickets at the dozen other performances of Carmen.

The opera’s season will end with a performance of Carmen on Aug. 23. There’s also a performance on Aug. 20.

This season the company also is performing Beethoven’s “Fidelio,” Donizetti’s “Don Pasquale,” “Dr. Sun Yat-Sen” by Huang Ruo; and a double bill of Mozart’s “The Impresario” and Stravinsky’s “Le Rossignol.”