Events that occurred on 24 July
 On Earth
- 1915 - J.R.R. Tolkien writes the poem The Happy Mariners.
- 1916 - J.R.R. Tolkien's second five-day front-line duty begins.
- 1938 - J.R.R. Tolkien writes Letter 31.
- 1968 - Artist Colleen Doran is born.
- 1971 - J.R.R. Tolkien writes Letter 326.
- 1982 - The second episode of the new version of the 1981 radio series of The Lord of the Rings is aired on BBC Radio 4.
- 1987 - Mythcon 18 at Marquette University, Milwaukee.
- 2008 - The Lord of the Rings Online: Shadows of Angmar, "The Ring-forges of Eregion" is released in Europe.
- 2009 - Tolkien Thing 2009 in Rieneck, Germany.