Events that occurred on 15 July.
 On Earth
- 1883 - Inkling Adam Fox is born.
- 1915 - J.R.R. Tolkien becomes a second lieutenant, and is appointed to the 13th Service Battalion of the Lancashire Fusiliers.
- 1919 - Tolkien is officially released from service, well over a year after the war's end.
- 1964 - J.R.R. Tolkien sends a letter to Miss J.L. Curry.
- 1979 - Mythcon 10 in San Jose, California.
- 1998 - Mythcon 29 in Wheaton, Illinois.
- 2004 - The Lord of the Rings Symphony in Seattle.
- 2004 - Tolkien Thing VI in Hohensolms, Hohenahr, Germany.
- 2006 - Tolkien Thing VIII in Diez, Germany.
- 2007 - Tolkien Thing IX in Diez, Germany.
- 2010 - Tolkien Thing 2010 in Bad Hersfeld, Germany.
- 2011 - Tolkien Thing 2011 in Breuberg, Germany.
- 2011 - Mythcon 42 in Albuquerque, New Mexico.