CREATE TABLE table_203_473 (id DECIMAL, "no." DECIMAL, "date" TEXT, "tournament" TEXT, "winning score" TEXT, "margin\ of victory" TEXT, "runner ( s ) -up" TEXT)

when was the tournament with more strokes than the hertz bay hill classic ?
SELECT "date" FROM table_203_473 WHERE "margin\nof victory" > (SELECT "margin\nof victory" FROM table_203_473 WHERE "tournament" = 'hertz bay hill classic')
SELECT "date" FROM "table_203_473" WHERE "margin\nof victory" > (SELECT "margin\nof victory" FROM "table_203_473" WHERE "tournament" = 'hertz bay hill classic')