Android typically forces low-priority apps to sleep so that they don't drain your phone's battery. Putting apps to sleep means they won't consume a lot of power and won't run in the background ...

Go to Settings > Notifications > Advanced settings. Alternately, tap Schedule, then choose Turns on at custom time, Turns on ...

How to: Go to Settings > Display on your Android phone. There, you'll find the option to switch between a light and dark ...