CREATE TABLE table_47615 ("Date" CLOB, "Competition" CLOB, "Winners" CLOB, "Score" CLOB, "Runners-up" CLOB)

What date did the Fai Cup with Derry City F.C. as runners-up take place?
SELECT "Date" FROM table_47615 WHERE "Competition" = 'fai cup' AND "Runners-up" = 'derry city f.c.'
SELECT "Date" FROM "table_47615" WHERE "Competition" = 'fai cup' AND "Runners-up" = 'derry city f.c.'