Dates and listening details already known to Music Journals.
Composed 1868
Composed over approximately 17 days in April–May 1868 prior to its premiere on May 13, 1868.
Composed 1896–1897
1896–1897 (completed in 1897; first published by Durand and premiered by the Société Nationale de Musique on May 18, 1897).
Composed 1928
IMSLP work page “An American in Paris (Gershwin, George)”: composition field “1928”; reviewed 2026-08-22.
Composed 2021
No exact source-backed composition date resolved in the automated pass; reviewed 2026-08-22.