a.m. To show that a time is between midnight and noon we write a.m. after it. analogue clock A clock or watch with hands is called analogue. It shows time using just 12-hour times. You can't tell if this clock is showing 7 o'clock in the morning or night. anti-clockwise ... means to go around a circle in the opposite way to the hands of a clock. clockwise ... means to go around a circle in the same direction as the hands of a clock. digital clock A clock or watch with numbers (digits) only is called a digital clock. Some digital clocks use 24-hour times. For example 7 o'clock p.m. is shown as 19.00 (19 hours after midnight). midnight 12 o'clock at night. On a digital clock it may be shown as 00.00. noon 12 o'clock mid-day. On a digital clock it is shown as 12.00. p.m. To show that a time is between noon and midnight we write p.m. after it. 12-hour clock times Our modern analogue clock is based on a sundial. The sundial could only show the time during the day. Most people didn't do very much outside these times so 12 hours was all that was needed. 24-hour clock times Modern forms of transport like trains and aeroplanes travel throughout a 24 hour day. 24-hour times are used to make sure that people know that a train of plane is leaving or arriving a.m. or p.m. Click here to close