Why do they even look at the expiration date?
My license is set to expire at the end of next month. Since the end of June, about every other time I go through security the TSO checking my ID says "Your ID expires soon, you should take care of that." or something to this effect, while holding my ID waiting for me to acknowledge.
I have resisted the urge to respond rudely, because maybe (just maybe) they think they are doing me a favor.