People's Philharmonic Choral Society Assisted by The National Youth Administration Symphony Orchestra The program states that this was the "first performance in revised version" of William Schuman's "This is Our Time," but the Grove Dictionary lists a performance of 4 July 1940. Not known if the version given on this performance differed from the one given in July. Steve Swayne. "Schuman, William." Grove Music Online. Oxford Music Online. Oxford University Press. Web. 13 Jun. 2013. choir and orchestra performance 1940-12-04T20:30:00