French phrase
À quelle date dois-je ~ ?
Meaning
By what date do I have to ___?
When to use it
Asks for the date by which an action is required. It is a polite way to clarify a deadline.
Example dialogue
À quelle date dois-je payer les frais d'inscription ?
By what date do I have to pay the registration fees?
Vous devez les régler avant le 1er septembre.
You have to pay them before September 1.