Events that occurred on 27 November.
 On Earth
- 1899 - Actor Gerik Schjelderup is born.
- 1907 - Author L. Sprague de Camp is born.
- 1914 - J.R.R. Tolkien reads The Voyage of Eärendel the Evening Star at a poorly attended meeting of Exeter College's Essay Club.
- 1914 - J.R.R. Tolkien writes Letter 2.
- 1954 - J.R.R. Tolkien writes Letter 157.
- 1977 - The 1977 animated version of The Hobbit is broadcast in the United States.
- 1993 - Magyar Tolkien Tarsasag, the Hungarian Tolkien Society, is founded.
- 1996 - Actress Alexandra Astin is born.
- 2006 - Actor Anthony Jackson dies.
- 2012 - The Hobbits: The Many Lives of Bilbo, Frodo, Sam, Merry and Pippin is published.