Here are some possibilities depending on what you want to say:
* Quand ton anniversaire? - When is your birthday?
* Quand ton départ? - When are you leaving?
* Quand ton ami arrive? - When is your friend arriving?
* Quand ton travail est fini? - When is your work finished?
* Quand ton chien a faim? - When is your dog hungry?
Please provide more context so I can give you the correct answer!