> some sort of camera that is able to know what day of the year it is without knowing the year! Which due to things like leap years is impossible. Just a small

> some sort of camera that is able to know what day of the year it is without knowing the year! Which due to things like leap years is impossible. Just a small note, as we're talking about assumptions, but this is clearly untrue. Consider - for decades, humans wore watches that knew the day of the month, but not the month - you were just expected to turn the day forward on the 1st day of months following non-31 day months. Similarly, we can imagine disposable cameras that ask the user for the current day on first use and simply assume leap years don't exist, and require the user to correct the date for any leap years. You might call this a silly design, but systems often have to interact with external systems that have silly designs. I believe I actually owned a toy PDA (a device for a child, not an adult) that did not have a year back in the 2003 or so.