Events that occurred on 29 January
 On Earth
- 1909 - Author and collector Richard E. Blackwelder is born.
- 1917 - Tolkien faces a Medical Board in Birmingham, but he is deemed not fit to return to war.
- 1954 - J.R.R. Tolkien writes a letter to the Rector of the University of Liège.
- 1968 - J.R.R. Tolkien writes a letter to Ken Jackson.