Post any trivia/fun fact あなた know/read.

Here's mine:

August 2010 has 5 Sundays, 5 Mondays, 5 Tuesdays, all in 1 month. It happens once in 823 years.
(see your calendar, right now!)

At exactly 6mins and 7secs after 5 o'clock tomorrow, Aug 9th 2010, it will be 05:06:07 08/09/10. This won't happen again until 3010.