If its a one trip only I'd predictably take note of the Euro lotto numbers and go back to the day they were drawn. I wouldn't want to alter the time/space continuum by running into my other self.
Good thinking Arky, who knows, you may not like your other self and end up being arrested for murder.
I'd go back to one day before they are drawn to make sure I had time to enter the winning numbers.
Ah, but if it's a "one-off" trip (so you can't come back, presumably), surely there'd be two of you in the same vicinity spacetime-wise & the continuum goes to hell in a handcart?