Page 126 - Maths Class 04
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24-Hour Clock
Some places like railways, airways, etc. work for 24 hours in a day and use
24-hour clock time.
We use the 24-hour clock to avoid confusion between morning time
(a.m.), afternoon and evening (p.m.).
In a 24-hour clock, after 12 (p.m.) noon instead of calling the next hour 1
o’clock, we say 13:00 hours, 2 p.m. is 14:00 hours and so on.
In a 24-hour clock, 4 digits are used for writing the time. In which, first 2
digits show the hours and the last two digits show the minutes.
12-hour clock time 24-hour clock time
12 midnight 00:00 hour (24:00 hours)
1 a.m. 01:00 hour
2 a.m. 02:00 hours
3 a.m. 03:00 hours
4 a.m. 04:00 hours
5 a.m. 05:00 hours
6 a.m. 06:00 hours
7 a.m. 07:00 hours
8 a.m. 08:00 hours
9 a.m. 09:00 hours
10 a.m. 10:00 hours
11 a.m. 11:00 hours
12 noon 12:00 hours
1 p.m. 13:00 hours
2 p.m. 14:00 hours
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