From his podium at New York City's Lincoln Center last week, Raymond Leppard gave a brisk downbeat and drew forth the majestic D that opens the "Haffner" Symphony. In doing so, he began the gala observance of Wolfgang Amadeus Mozart's 235th birthday. He also began an unprecedented Lincoln Center extravaganza: to celebrate the 200th anniversary of Mozart's death by performing during the next 19 months every note he ever wrote.
Leppard's lively performance of the "Haffner," with a scaled-down orchestra assembled from the New York Philharmonic and the Juilliard School Orchestra, was peculiar because it broke off after the minuet. Then...