Per IRS: A full-time student is a student who is enrolled for the number of hours or courses that the school considers to be full-time attendance.
Each school defines "full time" in its own way (usually in terms of the number of courses or hours).
For more information, please check: Am I considered a full-time student?
I think you're still enrolled until they hand you the diploma and you depart.
Perhaps. I could not find anything directly on point. Assuming the student above was not graduating but ending enrollment for the year, a question arises re "enrolled in a course of study" in the fifth month. When would enrollment end? ----date of final exam, date professor turns grades into administration, date administration posts course results to student's records, or some other date?
A call to the college may be helpful.