Années in French: Years, Duration, and Ans
Années and ans both mean years, but they answer different questions. Learn when duration wins, when counting wins, and how to choose.
French offers two words where English is content with one. Ans and années both land on “years,” and learners usually meet them as an unexplained pair to memorise. There is a pattern underneath, and it is the same pattern that governs jour and journée, matin and matinée, soir and soirée.
Quick answer
Use ans to count years as units, especially after a number: trente ans. Use années when the years are experienced as a stretch of time with texture - les années difficiles, ces dernières années. Ans counts; années describes.
Quick answer
The choice follows the question you are answering. If the answer is a quantity - how many? - the counting word is the natural one, and it stays close to its number: Il a vingt ans. If the answer is about a period lived through, with events inside it, the longer form takes over: les années de guerre. Both are plural, both mean years, and they are not interchangeable in either direction.
Elle a vingt-cinq ans. → She is twenty-five years old.
Les années d’après-guerre ont tout changé. → The post-war years changed everything.
Meaning and usage: Counting versus living through
A number in front is the strongest clue you will get. Deux ans, dix ans, cent ans - the years are being tallied, and the short form does the tallying. Remove the number and add an adjective or a description, and the long form usually takes over, because you are no longer counting units but characterising a span: de belles années, des années sombres. The years have gained content.
Nous attendons depuis trois ans. → We have been waiting for three years.
Ce furent de belles années. → Those were good years.
Examples in context: Where each form settles
Some frames are simply fixed by usage, and reading the table aloud is more useful than deriving each line from a rule.
Choosing between the two forms
| Frame | Form | Why |
|---|---|---|
| After a bare number | ans | Units being counted |
| With an adjective of quality | années | A span being described |
| ces dernières __ | années | A recent stretch of time |
| une décennie of them | années | les années 80 |
| Age statements | ans | Il a quarante ans. |
Ces dernières années, tout s’est accéléré. → In recent years, everything has sped up.
Nuance and register: Decades and named periods
Talking about a decade always takes the long form: les années 80, les années folles. This is consistent with the logic above - a decade is not a count of ten units but a period with a character, a soundtrack, and a set of events. You will never hear the short form here, and using it marks the sentence as foreign more clearly than most mistakes.
Il adore la musique des années 80. → He loves the music of the eighties.
Les années folles ont marqué Paris. → The Roaring Twenties left their mark on Paris.
The same pattern elsewhere
This is not an isolated quirk. Jour and journée, matin and matinée, an and année are built the same way: the short word points at the unit, the long word fills it with duration. Bonne journée wishes you a day with content in it; deux jours counts. Learning one pair well gives you the other three at a discount.
Bonne journée ! → Have a good day!
Je pars pour deux jours. → I am leaving for two days.
Common mistakes to avoid
Do not say j’ai vingt années for your age; age takes the counting form without exception. Do not reach for the short form with a decade - les ans 80 is not French. Do not assume an adjective always forces the long form, since deux longues années keeps its number and switches anyway, precisely because the years are now being characterised. And do not treat année scolaire as an error: a school year is a span with a shape, so the long form is expected.
L’année scolaire commence en septembre. → The school year starts in September.
Il a passé deux longues années à l’étranger. → He spent two long years abroad.
A memory image that holds up
Picture a row of coins and a photo album. Coins are countable, identical, and stack neatly: that is the short form after a number. The album is a stretch of time with pictures in it, and no one counts an album - they describe it. When the years in your sentence have contents, reach for the longer word.
Ces années-là restent gravées. → Those years remain etched in memory.
Try it before you check
Decide the form for each of these, then read on. “He is thirty years old” takes the counting form, since it is an age. “The war years were hard” takes the long form, because the years are being described. “I lived there for five years” counts, so the short form wins. “In the nineties” is a decade, so only the long form is possible.
Dans les années 90, il vivait à Lyon. → In the nineties, he lived in Lyon.
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Questions about this note
Can I always use années instead of ans?
No. Age and plain counting take ans, and swapping in années there sounds wrong to a French ear. The two forms answer different questions rather than offering a stylistic choice.
Why is it les années 80 and not les ans 80?
A decade is a period with a character rather than a tally of units, and French marks that with the longer form. This is fixed usage, and there is no counting reading available.
What about bonne année?
It fits the pattern: you are wishing someone a year full of things, not counting one. The greeting looks at the span ahead, so the long form is the natural choice.
Is deux longues années correct?
Yes. The number is still there, but the adjective shifts attention to the years as a lived stretch, so French allows and prefers the long form. This is the clearest sign that description, not arithmetic, drives the choice.