Events that occurred on 17 May.
 On Earth
- 1936 - Swedish author and interviewer Lars Gustafsson is born.
- 1954 - J.R.R. Tolkien writes a letter to Henry Willink.
- 1961 – Singer Enya is born.
- 1981 - The eleventh episode of the 1981 radio adaptation of The Lord of the Rings is aired on BBC Radio 4.
 In Arda
- There are no known events for this day.