However, you can tell the time without saying am and pm. To do this you can use the 24-hour clock. The 24-hour clock always uses 4 digits. You see this most often on digital clocks. Complete this ...

24-Hour Clock (Manual) by Sam Newman The Copenhagen-based American designer created the most low-tech clock possible. His design consists of a 1,440-page notepad with 86,400 tick boxes, one for ...