This is actually based on a play by Edgar Wallace, the famous British thriller author who divided his time equally between writing and going to the track; not surprisingly a few of his novels have a racing background. This story isn't actually much of a thriller as such, although it does have some crime content. Our hero (John McCallum) has sent an important message to his gold-digging girlfriend written on a banknote. He knows she's too greedy to destroy it, so the story revolves around how he can get the note back before his racing career is ruined. This is a pleasant lightweight movie, though you probably should know something about English society and/or horse-racing to really understand what's going on. Wallace's biographer Margaret Lane describes THE CALENDAR as "undoubtedly one of Wallace's best plays, for on this ingenious plot he built a structure of authentic and amusing racing detail and provided the incomparable Gordon Harker with another made-to-measure part in a character of a burglar turned butler." Wallace, incidentally, later went to Hollywood and was working on the script of KING KONG when he died.