Wiktionary
air du temps
n. Current popular opinion or trends of a very large group of people, a city or a country.
Usage examples of "air du temps".
They're misting Shane with L'Air du Temps as if he were a Boston fern.
Not the l'Air du Temps he caught when she opened her handbag close to the bars of his cage in the asylum.
The L'Air du Temps was full, a bottle of generic cologne nearly empty.
You use Evyan skin cream, and sometimes you wear L'Air du Temps, but not today.