Events that occurred on 30 January
 On Earth
- 1914 - The Chequers Clubbe, founded by J.R.R. Tolkien, is given permission to organize dinners.
- 1945 - J.R.R. Tolkien writes Letter 96.
- 1972 - J.R.R. Tolkien writes a letter to his grandson Michael George Tolkien.
- 2000 - Tolkien's Legendarium is published.
- 2005 - "The Invented Worlds of J.R.R. Tolkien" exhibition at Marquette University ends.
- 2014 - Director Arthur Rankin, Jr. dies.
- 2017 - Actor Victor Platt dies.
 On Arda