You can find the manual here:http://www.docs.sony.com/release/DSCS650_EN_ES.pdf
I'm afraid the camera does not have this date stamp feature. It even says so in the manual, so we can stop searching for it! (Page 28). You may be interested in an essay I wrote about date stamps, I'll paste it here:
How do I get the date printed on my photo?
I'm sorry, but many cameras don't bother to have this feature. The
thing is, this was a useful
feature on film photos, but the concept has been overtaken by
technology, and is no longer relevant. Heh - you probably disagree with
me, so let me explain that fully! When you take a photo with a
digital camera, the current date and time are automatically stored in
the photo file. In some cameras, it will be the same as the file date.
Some cameras date the file with the date of download rather than the
date of capture, but the date inside the file will always be the
capture date. The date of capture is one of the items of EXIF data. You
can read about this
'metadata' on wikipedia
So how does EXIF data fulfill the benefits of the old 'print on film'
date? From the point of view of indexing your library and simply not
forgetting when the photo was taken, the EXIF data should always be
present in the file, unless you choose to erase it. Thus, you will
never lose track of the date of capture; if you have the image, you
have the date. You can read the date with many tools, and in fact even
Windows explorer will tell you the date if you simply hover over the
picture. Here's an example; the bubble help shows the time of capture
picture was taken, (windows shows me the time of capture in my own time
What about legal proof of something? Sorry, you can't really do that
any more. You couldn't have done it if you'd printed it on the image,
either; it's just too easy to fake. The date of capture is editable, so
it doesn't prove anything. If you need proof, get legal advice... in
the heat of the moment, include a cellphone in-frame showing the date
and time; you could fake that too, but it would be much harder.
Oh, you wanted your dates printed on physical pictures? Find a print
shop that will print the EXIF capture date on the reverse of your
photo; that way the face of your picture won't be spoiled. There
is software that will print index sheets of your images and list their
capture dates and times, too. Very often the software that came with your camera, such as Sony's Picture Motion Browser
will print the date stamp on the printer from the EXIF data.
Some Canon cameras can add a date stamp just like the old days, some
can't do it at all, and some do it ONLY in 'postcard' mode (it's one of
the resolution settings). It's
interesting that they limit it to this size only when they could quite
easily have done it on all sizes, and I think this is to emphasise its
novelty value rather than a serious feature, for the reasons I gave
I have discovered that there are softwares which can add the EXIF date
to the actual visible image, there's one here:
http://gphotoshow.com/exif-iptc-watermarker.php and it is billed as a
watermarking tool. One of your choices for the input data is the EXIF
date within the file. It works, and it's free, but it does nag you to
pay from time to time.