One other option I'm looking for viewing images taken on a particular date. On the D7000, if I hit the zoom out button enough, eventually a calendar would pop up. If I hit the zoom out button one more time it would select the images in a small preview area on the right side of the LCD. From this calendar view option, I could select a date and click Format to delete all the images from that date. When I do this on the D800, it just prompts for which card slot I want to review.