Intended future duration (pour)

To express the intended duration of a future stay, trip, or assignment, use the preposition pour followed by a time expression (like un an or trois mois). French uses pour to state how long a specific event is planned to last.

Present and Future Tenses

You can use pour with future-tense verbs, or with present-tense verbs when making the arrangement.

She is taking a sabbatical leave for a year.
Elle prend un congé sabbatique pour un an.
We will be on sabbatical leave in Rome for a year.
On sera en congé sabbatique à Rome pour un an.
He accepts the assignment in our subsidiary for six months.
Il accepte l'affectation dans notre filiale pour six mois.

Professional Arrangements

This is common when discussing overseas assignments (les affectations) or secondments (les détachements). The preposition can follow the verb être (to be) or adjectives like renouvelable (renewable).

The secondment at the institute is for three months.
Le détachement à l'institut est pour trois mois.
The contract is renewable for a year.
Le contrat est renouvelable pour un an.

Temporary vs. Permanent

You can further contrast short-term plans using temporairement (temporarily) and définitivement (permanently).

We are not leaving permanently, it is just for a month.
On ne part pas définitivement, c'est juste pour un mois.
She accepts the assignment for one year, but she is staying permanently.
Elle accepte l'affectation pour un an, mais elle reste définitivement.