I’m sure some college student already had this idea but photographer Sharad Haksar beat ‘em to it with a real tangible product you might see in stores soon. The World’s First Camera Lens Calendar as he puts it, using the most venerable sign of a professional photographer to display the date. Each ring controls an aspect of the calendar but watch out 2032 because that’s when the world will end, at least in this iteration since it can’t go any further.