It is okay to ask about vacation time in an INFORMAL interview correct?

I asked to schedule the informal interview. I have yet to apply for the job.
My current job does not allow me to take vacay time when I want to.

I want to know how they operate. I cant even take a week off. Id be so behind. Instead, i can only take a day or two off here and there. Or take off close to the weekend. Miserable