I eat my last meal of the day by 6pm as a rule. This works very well for deep sleep. My first meal of the day is between 12-1pm, so I've got an 18-19 hour fast built in to each day. With this schedule and eating to satiety at each meal, I sleep well and never get hungry outside of my meal times. There are days when I'm busy and don't eat my midday meal either due to not having the time or because I forget to stop and eat. This schedule works very well for me.