This is a totally idle speculation at the moment but I've never know when you should tell a prospective employer about these things. Occasionally I've seen a section on a job application about booked holidays but otherwise I wouldn't know.
I'm applying for 2 jobs tomorrow and have 2 holidays and a smal day l op booked. Am currently working in schools so these are all in school holidays. I probably won't even get an interview but I was just wondering.