Events that occurred on 4 February
 On Earth
- 1933 - C.S. Lewis writes to lifelong friend Arthur Greeves about The Hobbit.
- 1937 - J.R.R. Tolkien's poem "The Dragon's Visit" is published in The Oxford Magazine.
- 1938 - J.R.R. Tolkien writes Letter 22.
- 1971 - J.R.R. Tolkien writes Letter 321.
- 2006 - Previews of The Lord of the Rings Musical open in Toronto.