Events that occurred on 10 May.
 On Earth
- 1966 - J.R.R. Tolkien writes Letters 287 and 288.
- 1981 - The tenth episode of the 1981 radio series of The Lord of the Rings is aired on BBC Radio 4.
- 1997 - The second day of Bree Moot 3 in Minneapolis.
- 2019 - The biographical film, Tolkien, is released in the United States.
 In Arda
- There are no known events for this day.