Clients!? Clients are wonderful things. They pay the bills. But they definitely ask you for some odd things.
I have a client who needed 10s of thousands of images, from different sources, to be displayed by the date they were taken. As he didn't want to spend hours in his favorite image editor, checking the properties of each file one by one, he punted the whole thing to me with a: "Hey, take these images, and add them to the gallery and make sure they display by date."
As it's my business to make clients happy, my reply, "Sure. I'll have that for you in a few days."