It sounds like you are running a program that overlays this information on top of demigod as I am not aware of any feature like this built into the engine. I use Fraps (http://www.fraps.com) to display my fps ingame but I remember with my old ATI videocard there was a program that overlayed FPS and time though it only worked with ATI videocards.
I would suggest checking the running programs on your system to determine what program is doing it.