Every time I set the date/time on my camera and turn the camera off and back on, it prompts me to reset the date/time???? Canon Powershot sx110 IS

https://support.usa.canon.com/kb/index?page=content&id=ART103443 here you go

Replace the clock battery as described on page 194 of this manual: http://www.fixya.com/support/p1131413-canon_powershot_sx110_digital_camera_9_0/usermanual-CFD6FE8-pdf

Replace the date battery following the instructions on page 194 of the manual.

Try performing a complete reset - this should iron out any electronic glitches.

http://www.willingsoftware.com/help/howto.shtml#34
The software has the time and date stamps.

1. Press the Func.set button
   
2. Use up/down arrows to select L (1600x1200 image size)
   
3. Use left/right arrows to select "clock and landscape" icon

Next time you finish entering the information, press the set/ok (or whatever) button twice.

you go to the menu and select one that has a little tool and select "Date/Time" and that will take you to the place where you can get the time and date!!:)

The menu on the camera controls the date and time stamp. Turn on the menu i camera mode, there are three choices, Camera, Settings and customize. Time stamp should be in the middle menu. Look for time settings and turn it off. All pictures have time and date always. The time/date stamp just makes it visible in the image.

This camera has a separate date battery. Lift up the small rectangular cover next to the main batteries. A small CR1220 battery maintains the date. Replace it and you should be OK. I just discovered this on the Canon web site.