Events that occurred on 29 August
 On Earth
- 1952 - J.R.R. Tolkien writes Letter 134.
- 1973 - J.R.R. Tolkien writes Letter 354, the last letter to be included in The Letters of J.R.R. Tolkien.
- 1977 - Mythcon 8 at University of San Diego, California.
- 1980 - Author Douglas C. Kenney dies.
- 1985 - Voice actor Patrick Barr dies.