'''Symphony No. 40''' in F major, Hoboken I/40, is a symphony by Joseph Haydn. Despite its number, Haydn had composed this symphony by 1763, long before the other symphonies numbered in the 30s and 40s in Hoboken's catalogAntony Hodgson, ''The Music of Joseph Haydn: The Symphonies''. London: The Tantivy Press (1976): 71. Chronologically, the symphony belongs with no. 13 and has stylistic similarities with Haydn's earliest symphonic output.