Tilly, for you: "In preparation for Operation Overlord, the BBC had signaled to the French Resistance that the opening lines of the 1866 Verlaine poem "Chanson d'Automne" were to indicate the start of D-Day operations. The first three lines of the poem, "Les sanglots longs / des violons / de l'automne" ("Long sobs of autumn violins"), meant that Operation Overlord was to start within two weeks. These lines were broadcast on 1 June 1944. The next set of lines, "Blessent mon coeur / d'une langueur / monotone" ("wound my heart with a monotonous languor"), meant that it would start within 48 hours and that the resistance should begin sabotage operations especially on the French railroad system; these lines were broadcast on 5 June at 23:15.[2][3][4]"
Seeing as how we seemed to be talking in riddles and code:)