What day is their record 13-15?
CREATE TABLE table_37347 (
    "Date" text,
    "Opponent" text,
    "Score" text,
    "Loss" text,
    "Attendance" real,
    "Record" text
)
SELECT "Date" FROM table_37347 WHERE "Record" = '13-15'
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 day is their record 13-15? ### Input: CREATE TABLE table_37347 (
    "Date" text,
    "Opponent" text,
    "Score" text,
    "Loss" text,
    "Attendance" real,
    "Record" text
) ### Response: SELECT "Date" FROM table_37347 WHERE "Record" = '13-15'