CREATE TABLE table_38168 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Record" TEXT, "Game Site" TEXT, "Attendance" FLOAT)

What Date has a Result of l 21 34?
SELECT "Date" FROM table_38168 WHERE "Result" = 'l 21–34'
SELECT "Date" FROM "table_38168" WHERE "Result" = 'l 21–34'