Read

Reading and Writing Time

This lesson introduces students to reading time on an analog clock and writing time correctly in digital and word form, covering o'clock, half past, quarter past, quarter to, and minute-by-minute readings, with worked examples that build confidence before moving on to related skills like AM and PM and elapsed time.

What does it mean to read and write time?

Reading time means looking at a clock, usually an analog clock with two moving hands, and figuring out what moment in the day it shows. Writing time means putting that moment down on paper in a way other people understand, either as digital numbers like \( 3:30 \) or in words like "half past three." Both skills work together: you cannot write a time correctly unless you first read the clock correctly.

The two hands of a clock

An analog clock face has twelve numbers, \( 1 \) through \( 12 \), arranged in a circle. Two hands sweep around this circle:

The hour hand is shorter and moves slowly. It points close to the current hour and drifts toward the next number as time passes within that hour.
The minute hand is longer and moves faster. It completes one full circle every \( 60 \) minutes, and each number it passes represents \( 5 \) minutes.

The figure below shows a clock face with the hour hand between \( 3 \) and \( 4 \), and the minute hand pointing straight down at \( 6 \). This clock is showing \( 3:30 \), or half past three.

The short red hand is the hour hand, sitting between 3 and 4. The long dark hand is the minute hand, pointing at 6, which means 30 minutes.

Reading time to the hour, half hour, and quarter hour

Some clock readings have their own special names:

O'clock: the minute hand points straight up at \( 12 \) and the hour hand points exactly at a number. This is written as, for example, \( 4:00 \) and read as "four o'clock."
Half past: the minute hand points straight down at \( 6 \), which is \( 30 \) minutes after the hour. Written as \( 4:30 \), read as "half past four."
Quarter past: the minute hand points at \( 3 \), which is \( 15 \) minutes after the hour. Written as \( 4:15 \), read as "quarter past four."
Quarter to: the minute hand points at \( 9 \), which is \( 15 \) minutes before the next hour. Written as \( 4:45 \), read as "quarter to five," since the hour hand is almost at \( 5 \).

For times that fall between these landmarks, count the small marks the minute hand has passed. Each number on the clock face is worth \( 5 \) minutes, so the minute hand pointing at the \( 7 \) means \( 7 \times 5 = 35 \) minutes past the hour.

Writing time in digital form

Digital time is written as hours and minutes separated by a colon, hour first and minutes second, with minutes always shown using two digits. For example, \( 9 \) minutes past \( 6 \) is written as \( 6:09 \), not \( 6:9 \). A time exactly on the hour still needs two zero digits, such as \( 8:00 \).

Writing time in words

When writing time in words, state the minutes first if they are \( 30 \) or fewer, using "past," and state the minutes until the next hour if they are more than \( 30 \), using "to." For instance:

\( 5:10 \) is written as "ten past five."
\( 5:50 \) is written as "ten to six," since it is \( 10 \) minutes before \( 6:00 \).
\( 5:00 \) is written as "five o'clock."

Worked example

A clock shows the hour hand just past the \( 7 \) and the minute hand pointing at the \( 9 \). Read and write this time three ways.

Step 1: The minute hand at \( 9 \) means \( 9 \times 5 = 45 \) minutes have passed.

Step 2: The hour hand just past \( 7 \) confirms the hour is still \( 7 \).

Step 3: Write the digital time as \( 7:45 \).

Step 4: Since \( 45 \) minutes is more than half of \( 60 \), count how many minutes remain until \( 8:00 \): \( 60 - 45 = 15 \). Write the time in words as "quarter to eight."

Once you are comfortable reading and writing a time, the next step is often to decide whether it is morning or evening, which is covered in Understanding AM and PM, and to figure out how much time passes between two clock readings, which is covered in Calculating elapsed time.

Related lessons

Math 3