Turn your camera flash on in the daytime and off at night
All digital cameras have an auto mode that handles everything. The user doesn’t even need to think about shutter speeds, aperture, or any other settings on the camera and that is the way the photographer often wants it.
This can also lead to problems though as certain light conditions can cause the camera to misread the lighting conditions.
Two examples of this are your local Christmas parade of lights and anytime you are taking someone’s picture in front of a sunlit window.
In the parade of lights, your camera will assume that you want to use the flash because it is so darn dark and with backlit subjects your camera will read plenty of light to shoot without a flash.