Arcsoft Photobase Download
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Usually your camera is what puts that date on. Check the set up on your camera.
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Save two copies of the picture, one in full color and the other one in black and white. Open the color version, and crop out just the part that you want to keep in color, erase everything else. You might want to blur/darken the edges, or make them gradually transparent to make the result look nicer. Then using the b&w copy as a background, paste your cropped color piece on top.
Another way to do this is by putting a saturation mask on top of the picture. Turn the saturation value down to 0 everywhere except the part you want to keep in color. I don't know how to do this with the software you mentioned, though.
If you have any program with the "clone" tool you can learn to do it.
I've heard GIMP can do most of what can be done in Photoshop ... and it's free.