Yep, this happens rather frequently with homework that's assigned over the weekend or extended projects. The daily homework isn't too bad because he has to finish it before he can play each day, but projects/assignments over the weekend are a different story. We don't require him to complete weekend projects/assignments on Friday.
I'd really like to help him become more responsible for his own time management, but if I don't remind him that he's still got stuff to do, we'll find him rushing to get 2 hours worth of work done in the 30 minutes before bed on Sunday evening....which will inevitably lead to an unpleasant situation. Sorry, no advice, but I can completely sympathize with your frustration.
