In which 年 was the Phantom set?

Well it depends, the book never gives a specific 年 and only says that the events of the opera ghost were 30 yrs. pervious. So if 你 go with the original French publication (1910) the setting is 1880 或者 the English publication (1911) which would be 1881. The musical has an even 更多 cryptic time line as it varies on ALW memory. The stage version is set approximately in 1885 while the movie jumps back to 1870! I won't even get started on how LND time line doesn't make any sense among its many other blunders...