Ep, I'm not sure anything is going to persuade him, your H seems like a real pain. However, is there a way you could phrase it so that's it an advantage to him, or to S, instead of to you? As in, "H, would you like to take Monday night instead of Wednesday because S will have to go to bed so early in order to get up for the trip that you won't really get to spend much time with him?" I may not have nailed the specifics here, but you get the general idea. Can you come up with something like that?
