How much time before I should I call ahead?

-It is for Maggie Inc. in Boston (it's an acting agency) and to get an audition you have to call (yes I' positive that's how u do it) and I would be around the first week in august. How far ahead should I call to get an audition? will they ask when i'm around or will i tell them? I don't want to mess it up!!Call as soon as possible. Just relax, youll be fine. Good luck at your audition!Call now. Let them do the asking and just provide answers.