Jeremy M. Praay wrote:
> I actually had that same question.  There could be a difference of
> interpretation in that regard.
>
> 12:00am October 15th would be 24 hours before what I would consider
> midnight October 15th.  I don't make the rules, but I can assume that
> they would have a lot of really angry people if they interpreted it
> the same way that a person would interpret 12:00am October 15th.
>
> Plus, I asked a few people (not related to this competition), and
> they all seemed to think that midnight October 15 occurred at the end
> of the day of October 15th.

The ISO-8601 standard could have been used to avoid confusion.