(A customer drives up to my window and hands me ticket.)

Me: “Hello, sir. The charge is $8 please.”

(The customer hands over money and then looks at screen which displays charge amount.)

Customer: “You know, your screen is confusing. Before, it said 18, and now it says 8.”

Me: “Yes, the screen displays the time before the ticket is read.”

Customer: “Hmm, then you better fix your clocks. I don’t think I have ever heard of 18 o’clock.”

Me: “The clock is on military time.”

Customer: “Oh…”

Friend in Customer’s Car: “Didn’t you serve in Iraq?”

Related:
Military Intelligence, Part 4
Military Intelligence, Part 3
Military Intelligence, Part 2
Military Intelligence, Part 1