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A guide to writing age and school years.

Use numerals, not words.

For example:

Do: 18

Don't: eighteen


For individuals, use ‘years old’ or ‘year old’, depending on the context. For groups, use ‘year olds’.

For example:

If you’re under 30 years old…

We asked an 18 year old…

We asked a group of 18 year olds…

Note: Don’t use hyphens.


For school years, capitalise the ‘Y’

For example:

Year 12 students