French phrase
L'offre est valable jusqu'à ~.
Meaning
This offer is valid until ___.
When to use it
States the date or time an offer remains valid. Formal wording for clearly giving an offer's expiration date.
Example dialogue
La promotion a-t-elle une date limite ?
Does the promotion have an expiration date?
L'offre est valable jusqu'à la fin du mois.
This offer is valid until the end of the month.