The New York City-based Park Avenue Chamber Symphony has announced plans for its 2020-21 season, which will come to a close with a gala concert celebrating the orchestra’s twentieth anniversary. Led by Music Director David Bernard, the orchestra is slated to perform music of Beethoven and Mahler in November 2020 and February 2021 at the DiMenna Center for Classical Music. Those performances will feature the orchestra’s signature InsideOut Concerts format, with the audience seated among the musicians. Early-afternoon performances will comprise a shortened event for families including young children, followed by an instrument petting zoo in collaboration with the Lucy Moses School. The full concerts for adults will be given at 5 p.m., followed by a reception with the performers. The orchestra will mark its twentieth anniversary with a spring gala featuring pianist Misha Dichter in a tribute to Beethoven; also on the program are Verdi’s Overture to La forza del destino and Prokofiev’s Symphony No. 5. The gala concert was postponed from its original date in May 2020 due to the pandemic shutdown and is now scheduled to take place on May 16, 2021 at Lincoln Center’s Rose Theater.