CREATE TABLE table_19078 ("Rd." FLOAT, "Race Title" TEXT, "Circuit" TEXT, "City / State" TEXT, "Date" TEXT, "Winner" TEXT, "Team" TEXT, "Report" TEXT)

What were the dates for Round 8?
SELECT "Date" FROM table_19078 WHERE "Rd." = '8'
SELECT "Date" FROM "table_19078" WHERE "Rd." = '8'