CREATE TABLE table_66648 ("Game" FLOAT, "Date" TEXT, "Opponent" TEXT, "Score" TEXT, "Location/Attendance" TEXT, "Record" TEXT)

What is the Date of the game against Detroit in game 31 or after?
SELECT "Date" FROM table_66648 WHERE "Game" > '31' AND "Opponent" = 'detroit'
SELECT "Date" FROM "table_66648" WHERE "Game" > '31' AND "Opponent" = 'detroit'