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Year 3 Maths Measurement

Time: AM and PM

A day has 24 hours. We split it into two 12-hour halves: AM (morning) and PM (afternoon and night).

☀ AM — Ante Meridiem

AM means before midday (before 12 noon). AM goes from midnight (12:00 am) to just before noon (11:59 am).

  • 12:00 am — midnight
  • 7:00 am — wake up time
  • 9:00 am — school starts
  • 11:00 am — late morning

🌙 PM — Post Meridiem

PM means after midday. PM goes from noon (12:00 pm) to just before midnight (11:59 pm).

  • 12:00 pm — noon (lunch)
  • 3:00 pm — school ends
  • 6:00 pm — dinner time
  • 9:00 pm — bedtime

Reading Clocks

On a 12-hour clock:

  • The short hand (hour hand) points to the hour
  • The long hand (minute hand) points to the minutes
  • Write time as: hours : minutes am/pm
  • Example: 2:30 pm = half past two in the afternoon

Minutes Past and To

  • o'clock — minute hand at 12 (e.g. 3:00)
  • quarter past — minute hand at 3 (15 min)
  • half past — minute hand at 6 (30 min)
  • quarter to — minute hand at 9 (45 min)

A Day in Order

12am

Midnight — start of a new day (12:00 am)

7am

Breakfast (7:00 am)

9am

School starts (9:00 am)

12pm

Noon — midday (12:00 pm)

3pm

School ends (3:00 pm)

6pm

Dinner (6:00 pm)

12am

Midnight again — new day begins!

Key Vocabulary

am — ante meridiem; the hours from midnight to just before noon
pm — post meridiem; the hours from noon to just before midnight
noon — exactly 12:00 pm (midday); the middle of the day
midnight — exactly 12:00 am; the middle of the night

Knowledge Check

Question 1

School starts at 9 o'clock in the morning. How should this be written?

Question 2

What time is exactly in the middle of the day (midday)?

Question 3

Which of these times is in the afternoon?

Question 4

The minute hand points to 6 and the hour hand points to 4. It is in the afternoon. What is the time?

Lesson Summary