There is software that does this after the fact.
And many more.
My Canon, HP, and Kodak cameras can add this at the time I snap the pic and is set via the camera's menus.
I am looking for a digital camera that I can purchase that saves the date/time stamp as part of the photo. Our Sony Mavica used to be this way, but our Canon SureShot A60 only prints the stamp, I believe, when using a Canon photo printer. I need a camera that makes the date/time a part of the photo so that if the file is modified, copied, etc. the actual date & time of the photo is still intact.
Does anyone have a suggestion for a manufacturer, series or model that performs in this manner?