French phrase
À quelles heures ~ est-elle ouverte ?
Meaning
At what times is ___ open?
When to use it
A polite way to ask when a place is open. Common for shops and public facilities.
Example dialogue
À quelles heures la bibliothèque est-elle ouverte ?
At what times is the library open?
Elle est ouverte de 9 heures à 18 heures, du lundi au vendredi.
It is open from 9 a.m. to 6 p.m., Monday through Friday.