Events that occurred on 7 September.
On Earth
- 1924 - Composer Leonard Rosenman is born.
- 1926 - Voice actor Don Messick is born.
- 1937 - J.R.R. Tolkien writes a letter to George Allen & Unwin concerning the promotion of The Hobbit.
- 1955 - J.R.R. Tolkien writes Letter 168.
- 1957 - J.R.R. Tolkien writes Letter 201.
- 1964 - J.R.R. Tolkien writes Letter 262.
- 1970 – The first Mythcon is held at Harvey Mudd Collegein Claremont, California.
- 1975 - Oxonmoot 1975 at the Welsh Poney, Oxford.
- 1989 - The Treason of Isengard is published in the UK.
- 1998 – Elfling goes online.
- 2000 - The Brazilian Tolkien society Conselho Branco, Sociedade Tolkien is founded.
- 2017 - The second edition of The J.R.R. Tolkien Companion and Guide is published.