When was the game at Gillette Stadium that ended in a final score of 30-17?
CREATE TABLE "2002" (
  "date" text,
  "visiting_team" text,
  "final_score" text,
  "host_team" text,
  "stadium" text
);
SELECT "date" FROM "2002" WHERE "final_score"='30-17' AND "stadium"='gillette stadium';