Hi,

I have Sony digital camera DSCP93 .

When I view the photo in the camera, the date and time appears on the photo's clicked.
However when these photo's are downloaded on the PC the Date & Time are Missing.

Please advice.

The date is stored in the photo's exif data. You can use a tool to add them on the photo. See BatchStamper (http://www.batchstamper.com)