French phrase
~ est valable jusqu'au ~.
Meaning
___ is valid until ___.
When to use it
States the expiration date of an offer or quote. It often signals that the terms may change after the deadline.
Example dialogue
L'offre est valable jusqu'au 15 mai.
The offer is valid until May 15.
Merci, nous vous donnerons une réponse avant cette date.
Thank you, we will give you a response before that date.