I think it'd be cool to rush up to a somewhat random person on the street, ask them wildly, "What's today's date???" To which they'd suspiciously reply, "Um, October 10th...why?" Then you'd say, "No...no...what year is it? What year??" (optional vigorous shaking with both hands on their upper arms). They'd take a small step back and slowly say, "....um, 2007." You would drop you arms, say something to yourself along the lines of, "...I've overshot again" or, "...then I still have time - I still have time!!" and then run off, laughing or crying.
Hey, it happens all the time in time travel movies. Why not now?