CREATE TABLE table_68004 ("Date" TEXT, "Tournament" TEXT, "Winning score" TEXT, "Margin of victory" TEXT, "Runner ( s ) -up" TEXT)

What was the date of the Ace Group Classic tournament with a 1 stroke margin of victory?
SELECT "Date" FROM table_68004 WHERE "Margin of victory" = '1 stroke' AND "Tournament" = 'the ace group classic'
SELECT "Date" FROM "table_68004" WHERE "Margin of victory" = '1 stroke' AND "Tournament" = 'the ace group classic'