CREATE TABLE table_31818 ("Week" FLOAT, "Date" CLOB, "Opponent" CLOB, "Time  (  ET  ) " CLOB, "Game Site" CLOB, "Final Score" CLOB)

What date is the 1:00 pm game at arrowhead stadium?
SELECT "Date" FROM table_31818 WHERE "Time ( ET )" = '1:00 pm' AND "Game Site" = 'arrowhead stadium'
SELECT "Date" FROM "table_31818" WHERE "Game Site" = 'arrowhead stadium' AND "Time ( ET )" = '1:00 pm'