CREATE TABLE table_7640 ("Date" CLOB, "Tournament" CLOB, "Winning score" CLOB, "To par" CLOB, "Margin of victory" CLOB)

Which date was the Winning Score 72-66-67-71=276?
SELECT "Date" FROM table_7640 WHERE "Winning score" = '72-66-67-71=276'
SELECT "Date" FROM "table_7640" WHERE "Winning score" = '72-66-67-71=276'