CREATE TABLE table_name_97 (date VARCHAR2, location VARCHAR2, result VARCHAR2)

What was the date of the game played at Gillette Stadium with a score of 40-21?
SELECT date FROM table_name_97 WHERE location = "gillette stadium" AND result = "40-21"
SELECT "date" FROM "table_name_97" WHERE "40-21" = "result" AND "gillette stadium" = "location"