I do that with future dates:
"That'll be $20.14."
"Ah, a famous date in the future."
"Whut's that?"
"The year Obama seized power and dismissed the Congress and Senate."
"Kewel!"
Or
"That'll be $20.17."
"Ah, a famous date in the future."
"Whut's that?"
"The year death camps started operating in America to kill Christians, whites, and conservatives."
"Kewel!"
I'll have to try that - historical connections don't pop up that often.