What date was an episode with a run time of 24:30 broadcasted?
CREATE TABLE "table1_1579922_1" (
  "episode" text,
  "broadcast_date" text,
  "run_time" text,
  "viewers_in_millions" text,
  "archive" text
);
SELECT "broadcast_date" FROM "table1_1579922_1" WHERE "run_time"='24:30';