It confuses me, also. But you can't very well say "12 hours a.m. (ante meridian, although I'm sure all of you already know that) because that would be 12 hours before
noon...and we're right back where we started! I think the question of whether noon is really midnight is probably a good one for the Academy-either that or a psycology novel.
<br /><br />I haven't entered the contest yet...although there's still time.