'Day/night wallpaper' module allows BioniX Desktop Background Switcher to display light wallpapers on your desktop during the day and dark wallpapers during the night.
BioniX Desktop Background Switcher detects night-time wallpapers by looking for a specific word like 'dark' or 'night' (see Keywords list below) in the wallpaper file name. Any file that doesn't include a keyword in its name is considered 'light' and it will be used during the day.
You can use a batch file rename tool (such as Total Commander) and to batch rename your wallpapers to include one of the keyword.
Afterglow, afterlight, bedtime, black, brink, crepuscular, dark, dimness, dusk, ebb, evening, gloaming, gloom, half-light, late-afternoon, night, obscur, shadow, sleep, sundown, sunset, twilight, witch.
Composite keyword are automatically included. Example: darkness, darkstar, midnight, pitchblack, witching, nightfall, goodnight, night-time
BioniX Background Switcher allows you also to set the sunrise/sunset time:
©Bionix Desktop Background Switcher