The DaySwitcher plugin let you choose a schedule for displaying a WordPress theme.
Simply configure the display theme schedule : choose the beginning and the ending hour of the theme to display, or the month. This way, you can have a theme with bright colors in the morning, and a theme with dark colors in the evening, for instance 
Installation :
Upload DaySwitcher folder to the /wp-content/plugins/ directory.
Activate DaySwitcher through the ‘Plugins’ menu in WordPress. puis activez le dans votre tableau de bord, sous “Extensions”.