Events that occurred on 29 December.
 On Earth
- 1928 - Actor and narrator Bernard Cribbins is born.
- 1953 - J.R.R. Tolkien visits Allen & Unwin at Museum Street in London.
- 1959 - Actor Brian Sergent is born.
- 1961 - J.R.R. Tolkien writes a letter to Miss Perry.
- 1966 - J.R.R. Tolkien writes Letter 293.
- 1980 - Amon Hen 48 is published.
- 1994 - Tyalië Tyelelliéva issue 3 is published.