So, I don't get it? The Midnighters get an extra hour of sleep?
According to the blurb on the first book
Strange things happen at midnight in the town of Bixby, Oklahoma.
For one secret hour each night, the town belongs to the dark creatures that haunt the shadows. Only a small group of people know about the secret hour -- only they are free to move about the midnight time.
These people call themselves Midnighters. Each one has a different power that is strongest at midnight: Seer, Mindcaster, Acrobat, Polymath. For years the Midnighters and the dark creatures have shared the secret hour, uneasily avoiding one another. All that changes when the new girl with an unmistakable midnight aura appears at Bixby High School.
So I'd expect a lot of The Dead Zone
-style FX shots of people moving around in a frozen world. And Wikipedia says
the "secret hour" is called "the Blue Time," so probably the whole thing will be tinted blue-ish.