CREATE TABLE table_24123 ("Game" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Black Knights points" FLOAT, "Opponents" FLOAT, "Record" TEXT)

Name the date for result loss for duke
SELECT "Date" FROM table_24123 WHERE "Result" = 'Loss' AND "Opponent" = 'Duke'
SELECT "Date" FROM "table_24123" WHERE "Opponent" = 'Duke' AND "Result" = 'Loss'