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