CREATE TABLE table_56646 ("Race" CLOB, "Date" CLOB, "Location" CLOB, "Pole Position" CLOB, "Fastest Lap" CLOB, "Race Winner" CLOB, "Constructor" CLOB, "Report" CLOB)

What day did Patrick Tambay have the fastest lap?
SELECT "Date" FROM table_56646 WHERE "Fastest Lap" = 'patrick tambay'
SELECT "Date" FROM "table_56646" WHERE "Fastest Lap" = 'patrick tambay'