What date did Mike Rockenfeller have the fastest lap?
CREATE TABLE table_27085 (
    "Round" real,
    "Circuit" text,
    "Date" text,
    "Pole position" text,
    "Fastest lap" text,
    "Winning driver" text,
    "Winning team" text
)
SELECT "Date" FROM table_27085 WHERE "Fastest lap" = 'Mike Rockenfeller'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What date did Mike Rockenfeller have the fastest lap? ### Input: CREATE TABLE table_27085 (
    "Round" real,
    "Circuit" text,
    "Date" text,
    "Pole position" text,
    "Fastest lap" text,
    "Winning driver" text,
    "Winning team" text
) ### Response: SELECT "Date" FROM table_27085 WHERE "Fastest lap" = 'Mike Rockenfeller'