No cut off point for me either. I eat between 7 and 8 pm on most days, so normally I don't need any snack, and anyway I just can't be bothered. I admit I've been tempted by late-studying snacks, but anyways, since I can't study past 11 pm any more, I moved that to "extra-early study sessions at 6 am", and then this end in breakfast, so I'm covered.
