A classmate of mine was asked “When’s your birthday?” when stopped by a cop. That was because he forgot to put his new sticker on his license plate, which was the reason for the stop: expired plates. But the cop was cool about it, because it was like Dec. 1 and the plate had expired end of Nov. So my classmate just got a reminder rather than a ticket.
Still looking for the link to the Cincinnati imposter, but here’s another recent one:
“How old are you, McLovin?”
I think everyone’s got it already - it was Super Bowl so he was smelling your breath for alcohol, and since you didn’t ping anything by knowing your age right off, he was done with you.
Yeah..let me fix that title.
It was Saturday night, not Superbowl, but it was after midnight.
ETA: Thanks for fixing the typo! D’oh!
Ah, so pre Super Bowl drinking then. 
“What’s your sign?” is another common question I’ve heard used by the occasional bouncer. Most people know their own sign without much hesitation, but can’t confidently answer for the fake birth date.
It sounds like he was looking for either a specific person or a specific vehicle. Once he approached you, he already knew he had the wrong person. This is likely the reason for the awkward exchange.
There is a certain Beauty in Truth.
Drunk drivers are victims? Since when?
Hey, man, those beers were out to get me!
My guess is that he was testing to see if you are who you say you are and not someone steeling your car. It’s the easiest thing on your license for the officer to remember.
IANAL and my experience is limited to Louisiana, but here if you have a concealed carry permit and you ever pulled over (in a car or bike or on foot) after providing your ID or DL you must tell the officer that you have a CC permit and, if you’re carrying, tell her/him where you’re carrying.
I’ve been pulled over just once since getting my CC permit and I found it helped. Following procedure to identify my status and tell him that I was not carrying gave me a chance to immediately establish that even though my inspection had expired I was normally a law-abiding citizen. He thanked me for following the CC law, gave me a warning about the inspection, and sent me on my way.
*Look for a woman driving a car with a burned out headlight. After stopping her, casually ask what her age is. If she answers “The moon spreads its glow o’er the hills”, respond with “Blue pens are better than red”. She will then hand over the manila envelope.
Otherwise, wait for the next car with a burned-out headlight driven by a women.*