It's 11.11.11 !!! And I'm posting this at 11:11, of course.
10.10.10 was cool, and 12.12.12 will be cool, too. And I love palindromes, so 12.22.21, if I'm around for it, will be totally kickass. But 11.11.11 is the best.
What can I say? This is the kind of thing you either like or you don't. I like!