While this is a relatively common feature on point & shoot cameras -- where the photo is thought of as a snapshot to document a memory in a person's life, among DSLR cameras it's not very common (I don't actually know of a DSLR that does this though I don't doubt that it may exist). DSLR users are usually expecting a higher quality image -- so now the image is thought of more like art and less like a snapshot and the date/time in the corner distracts from the image. Also they tend to be more advanced users who would be able to modify the image themselves so they have little need for such a feature.
The camera does record the date & time... but it's in the EXIF data (information recorded into the image file but not displayed).
SO... there are programs that will just do this. You'll need to do a search (I found several but have never tried one so I can't vouch for them). I think there are Photoshop plug-ins that do this (assuming you have Photoshop). These programs allow you to define the info you want printed (including EXIF data such as date/time) and you get to pick the location, font, size, color, etc. and ultimately the location on the image where you'd like the info displayed. They then add the info visibly onto the image for you and most support "batch" use (e.g. drop a whole folder of images on it and they'll do them all.)
Tim Campbell
5D III, 5D IV, 60Da
