And it's quite impossible to hold the events of seven years into one night's dream.

Well, not counting that one in the movie Jumanji where the leading character dreamt that he stayed in the jungle for 26 years.

Oh, and a little Harry Potter trivia:
Ginny's real name is Ginevra.
Ron's full name is Ronald Billius Weasley.
Hermione's is Hermione Jane Granger.
But we all know about Harry James Potter.