If you are awake tonight and use American-style date formatting, then you will get to witness 01:03:03 04/05/06. This happens once a century, of course. Or twice (if you put a.m./p.m. in there). Or it will happen again on May 4 for folks who use European-style dates. And, of course, next year we’ll have the whole sequence again, shifted by 1 (02:03:04 05/06/07). But it’s still kinda cool.
Nevertheless, if I’m up at that hour (I hope not), I will probably not notice.