It is a 12-hour clock. The first 12 hours of the day, from midnight to midday, are called am. The next 12 hours, from midday to midnight, are called pm. However, you can tell the time without ...

The first 12 hours of the day, the morning, are called AM. And the last 12 hours of the day, the afternoon and evening are called PM. Digital time on the other hand, can either use AM, or PM.