There isn't any way of proving any of that.

But in my case it's funny cause, I wake up around 2:30 in the afternoon so I end up smoking at 4:20 (either first or second time if i wake n bake).
And I get home from work at 2:00 in the morning. So I end up smoking at 4:20 (usually its my last bowl of the night).

lol. I'm always smoking and realizing that it's 4:20. It makes me smile everytime.