Back in 2009, right when I got a DS, I bought Pokemon Platinum. I played it a bunch for a while, then put it down. I picked it up for short times before putting it down again several times.
Today, bored, I decided to pick it up once more and finally really try to beat the Elite 4 (and the champion).
Took me three attempts, but I succeeded. After three years I finally beat the game.
And then I looked at the date I got the game.
I started on Oct 9th, 2009.
I beat the game on Oct 9th, 2012.
What an awesome coincidence.