1. Converting Time Revision Level D Learning Intention Success Criteria
To revise Level D work on converting between
12 and 24 hr clock and vice versa.
Change from 12 to 24 hour clock.
2. Change from 24 to 12 hour clock.

2. 12/24 Hour Clock Examples 8 pm becomes 9 pm becomes 6:30 pm becomes
2300
2200
2100
2000
1900
1800
1700
1600
1500
1400
1300
1200
11 pm
10 pm
9 pm
8 pm
7 pm
6 pm
5 pm
4 pm
3 pm
2 pm
1 pm
midday
1100
1000
0900
0800
0700
0600
0500
0400
0300
0200
0100
0000
11 am
10 am
9 am
8 am
7 am
6 am
5am
4 am
3 am
2 am
1 am
midnight
12/24 Hour Clock
To go from 12 hour clock to 24 hour clock just add 12 to the pm hours:
Examples
8 pm becomes
9 pm becomes
6:30 pm becomes
11:30 pm becomes
4:20 pm becomes
3:10 pm becomes
2000
2100
1830
2330
1620
1510

3. 12/24 Hour Clock Examples 2000 becomes 2100 becomes 1730 becomes
2300
2200
2100
2000
1900
1800
1700
1600
1500
1400
1300
1200
11 pm
10 pm
9 pm
8 pm
7 pm
6 pm
5 pm
4 pm
3 pm
2 pm
1 pm
midday
1100
1000
0900
0800
0700
0600
0500
0400
0300
0200
0100
0000
11 am
10 am
9 am
8 am
7 am
6 am
5am
4 am
3 am
2 am
1 am
midnight
12/24 Hour Clock
To go from 24 hour clock to 12 hour clock just subtract 12 from the hours if it is greater than 12:
Examples
2000 becomes
2100 becomes
1730 becomes
2208 becomes
2006 becomes
1350 becomes
8 pm
9 pm
5:30 pm
10:08 pm
8:06 pm
1:50 pm