(While ringing up a customer, the computer flags cold medicine and asks for age verification.)

Me: “Sir, I need to verify your date of birth.”

Customer: “Why?”

Me: “You’re trying to buy medicine and I just need your date of birth to confirm you are over the age of 18.”

Customer: “Oh. April 20th, 1420.”

Me: “Sir, I really need your actual birth date to continue.”

Customer: “4-20-1420. Put it in.”

(I enter the date. The system accepts. I look in disbelief.)

Customer: “Told you.”