You see this most often on digital clocks. Complete this interactive ... from midnight to midday, are 'am'. The last 12 hours, from midday to midnight, are 'pm'. A 24-hour clock doesn’t split ...

Some of its more unique features include a nightstand mode, so you can use your phone or tablet as a digital clock at your bedside ... It displays time in both the 12-hour and 24-hour formats.

After building a couple of more traditional clocks over the years, he set his sights on making a completely isolated digital clock that ... seconds per month (about 12 ppm).