CREATE TABLE table_24199 ("Round" FLOAT, "Country" TEXT, "Circuit" TEXT, "Date" TEXT, "Pole Position" TEXT, "Fastest Lap" TEXT, "Winning Rider" TEXT, "Winning Team" TEXT, "Report" TEXT)

When michele pirro is the pole position what is the date?
SELECT "Date" FROM table_24199 WHERE "Pole Position" = 'Michele Pirro'
SELECT "Date" FROM "table_24199" WHERE "Pole Position" = 'Michele Pirro'