You cant really change there patterns, but there patterns change naturally depending on food and the rut. It might be 1am now but in late october it might be 1pm. Another thing is like what others have said, find out where he is bedding, or where he is going, and how long he is there. Sometimes you might find out that on the complete oppisite side of the property he moves around all day. Finding the morning bedding spot is key. Setting up just outside of it and getting in really early and quiet might pay off, but remember if you spook him, he is the kinda of deer that will remember.