Should I remind him again?

Last week after the date he called me and we talked. At night we talked on the phone again then he asked me if I could come over to his house so we could hang out in his jacuzzi next week and I told him yes. So what if he forgets? Cuz I really wanna go out with him again. I wanna get prepared so if he doesn't "remember" he won't leave me hanging. Should I remind him when the time is near? Thanks!