This module allows you to have the header, or top, of your page change with specific images depending on the time of the day. It can be placed on any page and it can show any images. The times that the images change can also be made to change. This one is currently set to change for morning at 6am - 6pm, Afternoon from 6pm - 9pm and then night from 9pm - 6am.
Try changing the time on your computers  clock and looking to see if the image changes.

The images should be these ones shown:

Morning (6 am - 6 pm)