You can make Dynamic D-Day Image. Image size is 160x60, Use HTML img tag for presenting it to your website. When time goes, Image will be changed. But, If you save as an image to your harddisk, you can't see changed date and time.
 When your image was never requested for 3 days, Your image may be deleted.
 Input your D-day Title and D-day Year, Month, Day, Hour Values like this '2006122500'. hour is 24 hours unit.