While I wouldn't mention the pre-paid vacation during the interview, I would ask for that time off after being offered the job.
Most jobs don't offer paid time off in the start of the job. It's usually accrued or paid vacation after your first year of employment. But if you let them know before you start that you have a pre-planned event where you need time off. Most employers will allow you to take the time off without penalty and without pay.
#timeoff #negotiations #jobseeking
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