Yep, not 'til after you have completed all requirements. Furthermore, I'm unsure about this for all programs but most that I have seen do not consider you "class o/ (insert year you entered)" but rather the year you actually graduate. Which, of course, makes for an interesting time if you keep adding on a year for whatever reason. AND, something to keep in mind, there are some people who are still working on and/or finishing up dissertations when they go on their internships . . . so technically, you could finish your internship and still not graduate (i.e., earn your PhD) because you have yet to complete your dissertation. One of my profs was telling me about a few people he knew who went away for their internship and never graduated because they didn't complete their dissertations, nor did they bother to return in an attempt to finish. Now, hopefully, none of us will be this way but it's something to keep in mind! Some programs seem to plan for this as they may have a requirement that your dissertation be complete before you do your internship year . . . Check with YOUR program for their requirements. Seems like a waste of time, effort, and money to go all that way, only not to get your nifty piece of paper because you didn't defend your dissertation.