Events that occurred on 24 May.
 On Earth
- 1973 - J.R.R. Tolkien writes Letter 350.
- 1981 - The twelfth episode of the 1981 radio adaptation of The Lord of the Rings is aired on BBC Radio 4.
- 1992 - The Tolkien Phenomenon ends in Turku, Finland.
- 1994 - Inkling John Wain dies.
- 2004 - Understanding The Lord of the Rings is published.
 In Arda
- There are no known events for this day.