Events that occurred on 17 April.
 On Earth
- 1959 - J.R.R. Tolkien writes Letter 215.
- 1959 - Actor Sean Bean is born.
- 1967 - J.R.R. Tolkien writes a letter to J.D. Gilbert.
- 2007 - The Children of Húrin is published in the United States.
- 2007 - The third day of The Children of Húrin Release Party is hosted by Tolkien Gateway.
 In Arda
- There are no known events for this day.