The idea, step by step
A clock time appears twice
The hour hand goes around a 12-hour clock twice in a day. The letters am identify times from midnight up to noon. The letters pm identify times from noon up to midnight. A time such as 7:30 needs context or am/pm to tell us which part of the day it means.
The two special times
Noon is 12 pm, usually lunchtime. Midnight is 12 am and starts a new day. After 11:59 am comes 12:00 pm. For an important plan, writing “noon” or “midnight” can be clearer than the number 12 alone.
| Time | Example |
|---|---|
| 7:00 am | Morning breakfast |
| 12:00 pm | Noon |
| 7:00 pm | Evening meal |
| 12:00 am | Midnight |
A common trap
Calling noon 12 am.
Instead: Noon is 12 pm. Midnight is 12 am.
See the thinking
Before school
Write 8:15 in the morning using am or pm.
- The event is before noon.
- Morning times use am.
An evening bus
A bus leaves at 6:40 after dinner. Add am or pm.
- The context is evening.
- Evening comes after noon and before midnight.
Check your understanding
Is 12 noon 12 am or 12 pm?
Show answer
12 pm.
Noon begins the pm half of the day.
Your turn
6 questions · 7 marks · Work at your own pace.
Read the questions online
- Write 9:20 in the morning using am or pm.1 mark
- Write 4:10 in the afternoon using am or pm.1 mark
- Write midnight using a 12-hour clock time.1 mark
- Write noon using a 12-hour clock time.1 mark
- Which happens first on the same day: 6:30 am or 6:30 pm?1 mark
- An evening meeting notice says “8:00”. Explain what is missing and improve it.2 marks
Read the worked solutions
Equivalent correct methods earn the corresponding marks. Include units where asked.
- Write 9:20 in the morning using am or pm.1 mark
Morning before noon uses am.
9:20 am. - Write 4:10 in the afternoon using am or pm.1 mark
Afternoon comes after noon.
4:10 pm. - Write midnight using a 12-hour clock time.1 mark
Midnight starts a new day and the am half of it.
12:00 am. - Write noon using a 12-hour clock time.1 mark
Noon begins the pm half of the day.
12:00 pm. - Which happens first on the same day: 6:30 am or 6:30 pm?1 mark
Morning is before evening.
6:30 am. - An evening meeting notice says “8:00”. Explain what is missing and improve it.2 marks
A clock time repeats twice each day; pm makes evening clear.
The part of the day is missing. Write 8:00 pm.
Curriculum reference & lesson scope
Australian Curriculum v9 / SA Curriculum Mathematics 2026
am/pm; unit conversions; start/finish/elapsed time.
Official curriculum source ↗