I was watching for this.  Didn't know exactly what would happen, but I don't think it's a coincidence that this came out today...

http://apnews.myway.com/article/20111217/D9RMBAQG0.html

From 2005-04-19 to 2011-12-17 is 2434 inclusive days.

2434÷365.256 = 6.66 years.

There are other patterns, but can't seem to find my old notes...