an vs année (jour/journée, matin/matinée)
Summary
The masculine forms an, jour, matin, soir name a unit of time as a point or a count, while the feminine forms année, journée, matinée, soirée stress the duration or the content of that span.
Explanation
French has two words for several time periods: a short masculine form (an, jour, matin, soir) and a longer feminine -ée form (année, journée, matinée, soirée). They are not interchangeable. The masculine forms treat the period as a bare unit you count or pinpoint; the feminine forms treat it as a stretch you live through, qualify, or fill with content. English usually has only one word ("year", "day"), so the distinction has to be learned deliberately.
Use the masculine form after a number and after counting words like chaque, par, tous les: deux ans, cinquante ans, trois jours, chaque matin, deux fois par an. Here the period is a countable token, and pairing a plain number with the feminine form (deux années, trois journées) sounds wrong to native ears in ordinary speech. Think of an/jour/matin/soir as the unit on the ruler.
Use the feminine -ée form when you qualify the period with an adjective or describe how it was spent, and after quantity words like tout, plusieurs, quelques, and the interrogative quel(le): une bonne année, toute la journée, une matinée tranquille, une soirée agréable, quelle belle journée ! The -ée form looks inside the span at its texture and content, not just its count.
The clearest minimal pairs come from set phrases. Bonne année ! (Happy New Year!) treats the year as a single point you wish someone, whereas J'ai passé une bonne année means "I had a good year", the year as a lived-through span. Likewise Bonjour vs Bonne journée ! (the second wishes someone a good day ahead), and à ce soir vs Bonne soirée ! The greeting takes the masculine point; the well-wish about the unfolding period takes the -ée form.
Decision rule: after a number or a counting word (chaque, par, tous les) → masculine an/jour/matin/soir. With an adjective, a describing phrase, or quantity words like tout/plusieurs/quel → feminine année/journée/matinée/soirée. Exception worth noting: the feminine form can follow a number when it is itself qualified (les trois premières années, deux longues journées), because there the focus is back on the described span, not on bare counting.
Examples
J'habite ici depuis trois ans. — I have been living here for three years. (An: bare count after a number.)
Nous avons passé une journée magnifique à la plage. — We spent a wonderful day at the beach. (Journée: the day as a span, with an adjective.)
Bonne année ! Meilleurs vœux. — Happy New Year! Best wishes. (Année in the fixed greeting: the year as a point you wish someone.)
Il travaille chaque matin de huit heures à midi. — He works every morning from eight to noon. (Matin after chaque: the morning as a counted unit.)
Quelle belle matinée nous avons eue ! — What a beautiful morning we had! (Matinée with quel + adjective: the morning as a lived-through span.)
Bonne soirée ! On se voit demain. — Have a good evening! See you tomorrow. (Soirée wishes a good evening ahead; contrast à ce soir (the point in time).)
Common mistakes
J'ai vécu à Lyon pendant cinq années.
J'ai vécu à Lyon pendant cinq ans.
After a plain number, French uses the masculine unit an, not année: « cinq ans », « deux ans ». The -ée form (année) is for a span you qualify with an adjective or describe (« une année difficile », « toute l'année »). The decision rule: bare count after a number -> an; qualified or described span -> année. (Année does follow a number when itself qualified, e.g. « les cinq belles années passées là-bas ».)
Prerequisites
Related rules
timenounsconfusables