24 Hour Clock

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24 Hour Clock

• We are learning how to read the 24 hour clock

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There are 24 hours in a day!

• The first 12 hours of the day are from
• Midnight Midday

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In 12 hour time

• We count from midnight to midday
• Then we count from midday to midnight!

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Count the hours in the day
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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!

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We dont use AM or PM in 24 hour clock!

• 1 am
• 2am
• 3am
• 4am
• 5am
• 6am
• 7am
• 8am
• 9am
• 10am
• 11am
• 12 noon

• 0100
• 0200
• 0300
• 0400
• 0500
• 0600
• 0700
• 0800
• 0900
• 1000
• 1100
• 1200

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For PM times we keep counting to 24!

• 1pm
• 2pm
• 3pm
• 4pm
• 5pm
• 6pm
• 7pm
• 8pm
• 9pm
• 10pm
• 11pm
• 12 midnight

• 1300
• 1400
• 1500
• 1600
• 1700
• 1800
• 1900
• 2000
• 2100
• 2200
• 2300
• 2400 / 0000

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Look at Midnight!

• 1200 midnight

• 0000
• Why???

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Its 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!

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What about the minutes?

• In 24 hour time the minutes dont change.
• 1.15am 0115
• 245am 0245
• 624pm 1824
• 830pm 2030
• 1045am 1045
• 1135pm 2335

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Noon Midnight

• Noon
• 1200pm 1200
• 1215pm 1215
• 1230pm 1230
• 1245pm 1245
• 1250pm 1250
• 1205pm 1205
• 1210pm 1210

• Midnight
• 1200am 0000
• 1215am 0015
• 1230am 0030
• 1245am 0045
• 1250am 0050
• 1205am 0005
• 1210am 0010

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Click on the link to return to our website

• http//www.killeanps.com/projects.html