i couldn't sleep last night, so i looked trough my phone a found that there is 3 fri 13ths this year. now three fri the 13ths only occur when there is a fri 13th in February and on a leep year

Also, there was an unofficial holiday square root day 3/3/09 which fall upon each century. There was a Friday the 13 on 2/13/09, today 3/13/09 and the next one is 11/13/09! The next time we'll see 3 Friday the 13ths will be in 2012! 1/13/12, 4/13/12 and 7/13/12. 2010 only having one. As for square root day the next dates are 4/4/16, 5/5/25, 6/6/36, 7/7/49, 8/8/64 and ENDS at 9/9/81.

It's funny how 13 is always left out... there are 12 months in a year, 12 signs of the zodiac, 12 tribes of Israel, 12 apostles of Jesus, 12 days of Christmas and 12 eggs in a dozen. What's your opinion, is there some sort of puzzle in it or just myth?

I need some sleep............