We can tell the time without saying AM and PM though - for this, we use the 24 hour clock. The 24 hour clock always uses 4 digits, and we use this system most often with digital clocks.

Not that the present situation and the abundance of free time that many are experiencing has anything to do with [Leo Fernekes] all-transistor digital clock build, which he started a year ago ...

【Wooden Digital Wall Clock with LED Digits】Andoolex digital wall clock built with big clear LED digits shows Time, Date, Week, and Indoor Temperature, making it much easier to view at a glance ...

Black in colour, this digital alarm clock has a simple and friendly design. It will display everything from your alarm details to the date and time on the screen. You can also see the temperature ...

DIGITAL CLOCK: You are strange. NARRATOR: There are 24 hours in a day and analogue time splits it into two halves. The first 12 hours of the day, the morning, are called AM. And the last 12 hours ...

It follows a report in the Times Educational Supplement of a conference being told that pupils needed a digital clock to be able to tell the time. Malcolm Trobe, of the ASCL head teachers' union ...

Oh sure, there are flip-up digital clocks and all manner of mechanical seven-segment displays, but this one seems to be quite unique, and very pleasing.