A recurring story element that I've noticed is the accessibility of certain evil/dark devices at midnight.
A few examples:
- In the third episode of Sailor Moon, girls listen to a midnight radio show that is hosted by the antagonists illegally. Girls that wrote into the show and are read on air receive a brooch which steals their energy.
- In Persona, there is a midnight channel which broadcasts the shadow of the person that is currently missing.
- In Jigoku Shoujo, there is a website that is only accessible at midnight, which will allow the user with a grudge to send someone to hell.
Why do all three of these anime use midnight as a time for evil? What is special about midnight that sets it apart from any other time?