Apostrophes are used in time expressions such as 2 days' leave. |
When it is one measure of time, the apostrophe goes before the s (e.g., one day's pay). When it is more than one measure of time, it goes afterwards (e.g., two days' pay).
Apostrophes in Time (Temporal) ExpressionsApostrophes are used in time expressions such as 3 years' insurance (also called temporal expressions). In a temporal expression, the apostrophe is positioned before the s for single units of time and after for multiple units of time.
My car came with a years' free insurance. [correct the example]
(one year - apostrophe should be before the s)
These are both correct.
This is wrong. It should be 3 months' mobile insurance.
This is wrong. It should be 4 years' free credit.
Applicants should have at least 3 year's experience. [correct the example]
(three years - apostrophe should be after the s)
DO NOT USE APOSTROPHES FOR ALL TIME EXPRESSIONS – ONLY WHEN THEY COULD REPLACE THE WORD OF
The following do not have any apostrophes in them:
IT'S NOT ALL ABOUT TIME
The vast majority of these expressions are time expressions, but some relate to value and distance too: