The worst thing is getting notifications in the middle of the night when you are just trying to get a decent night’s sleep.
The GalaxyS3 has a Blocking Mode that you can switch on or off in the settings of your phone under the Device subcategory.
By tapping on ‘Blocking mode’ you will be able to customize what you would like to block, whether it is incoming calls, notifications, alarms, timers or LED indicators, for all time or just a specific period. You can, however, ensure that emergency calls are able to get through to you at any point in time by specifying ‘allowed contacts’.