How do you respond to quelle est la date de ton anniversaire in french?

The most natural and direct response to "Quelle est la date de ton anniversaire?" (What is your birthday?) depends on whether you want to share your birthday or not:

If you want to share your birthday:

* "Mon anniversaire est le [date]". (My birthday is on [date]). For example, "Mon anniversaire est le 15 avril." (My birthday is on April 15th).

If you don't want to share your birthday:

* "Je ne veux pas le dire." (I don't want to say).

* "C'est un secret." (It's a secret).

* "Je préfère ne pas répondre." (I'd rather not answer).

* "C'est une information personnelle." (It's personal information).

You could also add a little humor, like:

* "C'est une date très spéciale, mais je préfère la garder secrète." (It's a very special date, but I prefer to keep it secret).

Remember, it's completely okay to not share personal information like your birthday if you're not comfortable doing so.