So to start, head to Settings and select Do Not Disturb, then enable the toggle next to 'Scheduled.' From there, tap the From/To field and use the next menu to set up quiet hours. Don't Miss: All the Cool New iOS 12 Features You Didn't Know Aboutīedtime Mode will only work if you have Do Not Disturb mode's 'Scheduled' setting enabled - otherwise, you won't see the Bedtime Mode option.The feature is only available on iOS 12 and higher. While DND mode is still present on iOS 12, Bedtime Mode builds on it to help minimize night-time distractions. Previously, you could use Do Not Disturb mode to mute alerts on a schedule when you needed peace, but this didn't stop the notifications from piling up on your lock screen. Thankfully, iOS 12's new Bedtime Mode has a solution for this problem. You just wanted to know how much longer you could sleep, but now your mind's racing after seeing all of the messages you need to deal with. As soon as you do, you're greeted by a wall of notifications on your lock screen. Let's say you wake up in the middle of the night and check your phone to see the time.