Events that occurred on 18 November.
 On Earth
- 1916 - The Battle of the Somme ends. Neither side wins. J.R.R. Tolkien is officially stricken off as a casualty by his Batallion.
- 1941 - Actor David Hemmings is born.
- 1976 - Voice actor Dominic Armato is born.
- 1980 - Unfinished Tales is published in the USA.
- 2008 - The Lord of the Rings Online: Daughter of Strife, patch is released.
- 2008 - The Lord of the Rings Online: Mines of Moria expansion is released.
- 2015 - The Tolkien Treasury is published.