Android L preview: Do Not Disturb mode

Proper system-level "do not disturb" settings have been a hit-or-miss feature depending on what manufacturer's phone you choose, and was a completely missing feature on stock Android devices — a void filled by countless free and paid third-party apps that have done a great job. For as good as these apps are, there's really nothing that can beat a well-done system settings pane that lets you cancel out sounds, calls and notifications on your schedule at the lowest level.

Luckily one of the many improvements in Android L is the inclusion of a proper Do Not Disturb mode, which helps you keep your phone silent when it needs to be whether that's overnight on a schedule or just for a limited one-off situation.

source: androidcentral