Tvheadend

Is it possible to add an option to the automatic recorder to record after a certain hour? For example I want to record a show that usually starts around 7pm/8pm on a sunday. On sunday morning it shows repeats of last weeks show. If I use starting around 7pm, it doesnt always record the program, and if i leave that section blank it will record the old episodes shown on a sunday morning. So if there was an option to record "show x" after 18.00hrs then it should, in theory, record it correctly every time.