opportun

Attends le moment opportun.

See which way the cat jumps.

Je le lui dirai au moment opportun.

I will tell it to him at the proper time.

Nous devons choisir avec soin le moment opportun.

We must choose the right moment carefully.

Les résultats du sondage seront annoncés en temps opportun.

The results of the survey will be announced at the appropriate time.