See also: 1783 in music, other events of 1784, 1785 in music, list of years in music.

Events

• June 13 - Wolfgang Amadeus Mozart's Piano Concerto No. 17 is performed for the first time, by his student, Barbara von Ployer . Giovanni Paisiello is in the audience.

Classical music

• Joseph Haydn - Symphony no. 76
• Michael Haydn - Symphony in B flat major; Symphony in C major
• Giovanni Battista Viotti - Duetto concertante for 2 Violins in D major; Duetto concertante for 2 Violins in D minor

Opera

• "Il Ricco d´un giorno" by Antonio Salieri, libretto by Lorenzo Da Ponte
• "Les Danaides" by Antonio Salieri
• "Richard Coeur de Lion" by André Grétry

Births

• January 1 - William Beale
• January 27 - Martin-Joseph Mengal , composer
• January 29 - Ferdinand Ries, composer
• January 31 - Carl Wilhelm Henning , composer
• February 3 - John Fane , composer and diplomat
• February 27 - Job Plimpton , composer
• April 8 - Dionisio Aguado
• July 27 - Georges Onslow
• August 5 - Louis Spohr
• September 7 - Frantisek Max Knize , composer
• October 15 - Thomas Hastings , composer
• December 1 -Francois Henri Joseph Castil-Blaze , composer

Deaths

• January 11 - Ferdinand Philipp Joseph Lobkowitz , composer
• February 24 - Anton Laube , composer
• June 7 - Jean-Baptiste Canavas
• July 1 - Wilhelm Friedemann Bach
• August 6 - Karl Kohaut , composer
• August 4 - Giovanni Battista Martini
• September 27 - Boniface Stoecki , composer
• exact date unknown - Joseph Key of Nuneaton, composer of popular church music