Events that occurred on 4 November.
 On Earth
- 1946 - Actor John Callen is born.
- 1950 - Actor John Vickery is born.
- 1954 - J.R.R. Tolkien writes Letter 156.
- 1961 - J.R.R. Tolkien writes Letter 232.
- 1968 - J.R.R. Tolkien writes a letter to Mary Fairburn.
- 2003 - The Lord of the Rings: War of the Ring is released in the US.
- 2003 - The Essential J.R.R. Tolkien Sourcebook is published.
- 2011 - The Lord of the Rings: War in the North is released in Africa, the Middle East, Low Countries, Southern Europe (except Spain), Eastern Europe and South America (except Brazil).
 In Arda
- F.A. 495:
- T.A. 3018:
- T.A. 3019: