Time on a 24-Hour Clock

Stage 5 of 23 Strand 9 of 9 2 lessons

2 illustrated lessons, each teaching the why before the how.

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am and pm #

Two laps a day, and the marker that says which.

am names the lap before noon, and pm the lap after

A day runs in two laps of twelve. The first lap is am: 7:00 in the morning is 7:00 am.

The same 7:00 comes back in the second lap, after noon: that one is 7:00 pm.

Noon itself is 12:00 pm, and midnight is 12:00 am — each is where one lap hands over.

Now you

Bedtime is 9 at night. Which is it?

School starts at 9 in the morning. Which is it?

Hours numbered straight through, from 00 to 23.

The hours of a day are numbered straight through to 23, so no am or pm is needed

Nine at night wears the same name as nine in the morning — pm says which.

The 24-hour clock does not restart at noon. Nine at night keeps counting: 21:00.

Half past two in the afternoon is 14:30 — a whole 12 hours, then 2 more.

Now you

A film starts at 11:45 pm. What time is that on a 24-hour clock?

A film starts at 7:05 pm. What time is that on a 24-hour clock?