24-hour clock
You learn to read a 24-hour clock, like 19:00, and say which part of the day it is.
How to work it out
- If the hour is greater than 12, subtract 12: 19:00 is 7 o’clock.
- State the part of the day.
15:00
- Look at the hour: 15 is more than 12.
- Subtract 12: 15 − 12 = 3.
- It is 3 o'clock in the afternoon.
More examples
21:00
- Look at the hour: 21 is more than 12.
- Subtract 12: 21 − 12 = 9.
- It is 9 o'clock in the evening.
09:00
- Look at the hour: 9 is not more than 12, so nothing changes.
- It is 9 o'clock in the morning.