Events that occurred on 5 July
 On Earth
- 1935 - Hilary Tolkien marries Magdalen Matthews.
- 1944 - J.R.R. Tolkien writes Letter 75.
- 1947 - J.R.R. Tolkien writes Letter 108.
- 1981 - The eighteenth episode of the 1981 radio series of The Lord of the Rings is aired on BBC Radio 4.
- 2001 - Tolkien Thing III in Cologne.
- 2011 - A revised printing of Parma Eldalamberon 12 is released.