Pièce d'occasion
A pièce d'occasion like the word pièce meaning preparing and d'occasion meaning for special occasion suggests a composition, dance or theatrical piece composed, often commissioned, for a festive occasion.
Examples
The Dying Swan, ballet by Mikhail Fokine for the ballerina Anna Pavlova Fanfare for a Prince, ballet by John Taras Dance Preludes, ballet by Miriam Mahdaviani FOR 4, dance by Christopher Wheeldon Silla, opera seria by Handel Elvida, opera by Gaetano Donizetti Entrez, messieurs, mesdames, pièce d'occasion by Offenbach Les dragées du baptême, pièce d'occasion by Offenbach La statue retrouvée, an entertainment for a private costume ball in Paris with music by Erik Satie, scenario by Jean Cocteau, designs by Pablo Picasso and choreography by Leonide Massine.How He Lied to Her Husband, playlet by George Bernard Shaw.