CREATE TABLE table_2447 ("Round" FLOAT, "Circuit" TEXT, "Date" TEXT, "Pole Position" TEXT, "Fastest Lap" TEXT, "Winning Driver" TEXT, "Winning Team" TEXT)

What date did Adriano Buzaid have the pole position?
SELECT "Date" FROM table_2447 WHERE "Pole Position" = 'Adriano Buzaid'
SELECT "Date" FROM "table_2447" WHERE "Pole Position" = 'Adriano Buzaid'