I don't know how many times I internally chuckle when I glance at the clock some time before I go to bed and it's "21:12"; a meaningful number to me as the "2112" album and the band Rush was a big part of my youth.

That, and I tend to go to bed between 21:00 and 22:00. But I don't attribute it to anything but me being in a position to look at the clock around that time, and I haven't wondered if I see it any more than 21:09 or 21:30. Would be an interesting histogram, if nothing else.