2009 is good i guess ^^
Going back in time to claim a lottery price wont work. Entropy moves with the speed of light. When you reach the past to fill out your lottery ticket entropy will instantly change the winning numbers. It might work if you could not only travel back in time but also change your location in the universe. If you fill out the lottery ticket, 1 lightday away, one day before the drawing it might work. Quantum entanglement could prove to be a problem though...
Believe me, i tried...^^
I like this guy lol