Right Herb, a date is what is required in the form MM/DD/199X. Again, you're guessing when the mystery number registers.

I set it up that way rather than trying to guess when the 1,000th person registers so there is no incentive to register late in the contest. It's basically a chance.

Of course you've got to be registered to win and the contest ends when the 1,000th person registers. Only one guess per registrant.