CREATE TABLE table_56346 ("Race" TEXT, "Date" TEXT, "Location" TEXT, "Pole Position" TEXT, "Fastest Lap" TEXT, "Race Winner" TEXT, "Constructor" TEXT, "Report" TEXT)

On what date did a race occur at Long Beach?
SELECT "Date" FROM table_56346 WHERE "Location" = 'long beach'
SELECT "Date" FROM "table_56346" WHERE "Location" = 'long beach'