This is great if you forget to turn your phone ringer off at night. If you are like me you get emails and text messages all day and night. This will give you the sleep you need, or keep you from getting audible notices while at work.
Then
Mute ringtone
This action will mute your Android device's ringtone. If your device is already muted, it will remain muted.
Explore more great ways to automate Date & Time and Android Device