When interviewing for a new position, is it common practice to count the days spent on interviews as vacation days?
It wouldn't seem unreasonable to count these as vacation days, except that I could also see them as being work days. If I were only visiting to give a lecture and speak with faculty in another department, it would seem like work, and presenting at a conference is certainly not vacation.
A few follow up questions - does it matter that I am a post-doc (e.g. would it be different from a faculty, in which case interviewing for another position would not be in the interest of the current employer)? Would it be different if I were interviewing at a company rather than a university? Does it depend on the country? I am in the U.S.
(this is related to the question related to Do presentations given during interviews count as invited talks?)
In most cases you will not take all of your vacation days and work more than the required number of hours, so it shouldn't really matter. As a post-doc, you should ask your advisor.