CREATE TABLE table_41041 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Attendance" FLOAT)

What's the highest week for the day of October 21, 1956?
SELECT MAX("Week") FROM table_41041 WHERE "Date" = 'october 21, 1956'
SELECT MAX("Week") FROM "table_41041" WHERE "Date" = 'october 21, 1956'