So you're using MMM-ModuleScheduler or something else... No sense having your mirror blank....
Enter MMM-NightLight... use MMM-ModuleScheduler or other module to turn off your modules and turn on MMM-NightLight!
cd ~MagicMirror/modules
git clone https://github.com/cowboysdude/MMM-NightLight
NO NPM INSTALL REQUIRED
{
module: 'MMM-NightLight',
position: 'bottom_bar',
//classes: 'night_scheduler',
config: {
maxWidth: "100%"
}
},