"Neptune Nears End of First Orbit Since Its Discovery in 1846": it's end is in 2011.
Neptune "year": 2011 - 1846 = 165 earth years.
Earth summer vacation: 3 months/one quarter of year approximately.
165/4 = 41.25 earth years of summer vacation!
I'm sure if Neptune had teenagers, they would LOVE this.
I'm sure if Neptune had teachers: they would NOT!
Link to the article here by Geoff Gaherty for SPACE.com.