 DATE: The calendar page that Capt. Brittles uses to mark off the  days until his retirement is for the wrong month. The calendar most  unusually shows the year but not the month, and the only months in  1876 that this page would have fit were March and November. It  should be the July calendar, as the film starts on the 5th of the  month, and news of Custers death at Little Big Horn on Sunday June  25 is just arriving by (anachronistic) pony express.