Depends on the season and the spot.

During the rut i try to stay on stand all day. (try being the key word)

I have a place i hunt in the suburbs where there is no point for me to hunt in the mornings, been hunting there for a while and never see anything in the am, however i must be on stand before noon, no matter what time of year. The deer move heavey there between 1230 and 230, and then again an hour or so before dark. Guess it depends on the area. High pressure deer typically dont move much during the day, so for some guys its a waste, however you never know unless your there.