1. No category

24 Hour Clock
We are learning how to read the
24 hour clock
There are 24 hours in a day!
• The first 12 hours of the day are from:
Midnight –
Midday
In 12 hour time
• We count from midnight to midday
• Then we count from midday to midnight!
Count the hours in the day…
1,2,3,4,5,6,7,8,9,10,11,12
1,2,3,4,5,6,7,8,9,10,11,12
In 24 hour time we count from...
1 to 24!
• 1,2,3,4,5,6,7,8,9,10,11,12,
•
13,14,15,16,17,18,19,20,21,22,23,24!
We don’t use AM or PM in 24
hour clock!
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1 am
2am
3am
4am
5am
6am
7am
8am
9am
10am
11am
12 noon
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01:00
02:00
03:00
04:00
05:00
06:00
07:00
08:00
09:00
10:00
11:00
12:00
For PM times we keep counting to
24!
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1pm
2pm
3pm
4pm
5pm
6pm
7pm
8pm
9pm
10pm
11pm
12 midnight
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13:00
14:00
15:00
16:00
17:00
18:00
19:00
20:00
21:00
22:00
23:00
24:00 / 00:00
Look at Midnight!
•12:00
•00:00
midnight
•Why???
It’s a new day
• Midnight is the very beginning of the new
day.
• We have counted a full 24 hours
• The day is over – so we start counting
again from zero!
•
1,2,3,4,5,6,7,8,9,10,11,12,
13,14,15,16,17,18,19,20,21,22,23,24!
What about the minutes?
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In 24 hour time the minutes don’t change.
1.15am
01:15
2:45am
02:45
6:24pm
18:24
8:30pm
20:30
10:45am
10:45
11:35pm
23:35
Noon & Midnight
• Noon
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12:00pm
12:15pm
12:30pm
12:45pm
12:50pm
12:05pm
12:10pm
• Midnight
12:00
12:15
12:30
12:45
12:50
12:05
12:10
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12:00am
12:15am
12:30am
12:45am
12:50am
12:05am
12:10am
00:00
00:15
00:30
00:45
00:50
00:05
00:10
Click on the link to return to our
website
• http://www.killeanps.com/projects.html