Via Google Blog

Remember that time when checking one notification turned into staying up an hour past your bedtime? We bet you weren’t too happy. So we created Bedtime mode to remind you when it’s time for bed and limit interruptions by keeping your phone dark and quiet while you sleep. 

Now with the addition of the Bedtime tab in Clock, you can maintain a consistent sleep schedule, track your screen time at night, and fall asleep to soothing sounds from Calm, Spotify, YouTube Music and more. And if you dread feeling startled by your alarm, you can wake up more gently with visual cues from the Sunrise Alarm and your favorite sounds or song.  

The Bedtime tab in the Clock app is now available for devices running Android 6.0 and above. For devices with Digital Wellbeing installed, turn on Bedtime mode in your settings or schedule it directly from the Clock app.

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