I’d go with a day in the future for 2 reasons that come to me right away,

People I know now, would still recognize me in the future, because I would be “past Johnny”, so I would have more safe havens, and more people to talk to. (if I went to the past, and tried to walk into my house, I’d probably get arrested, or I guess I’d have to shave my beard)

And the other reasonwould be to learn things in the future so that when I return to the present, I could invest in things that are known to be successful, ie I’d be rich.