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Events that occurred on 25 April.
 On Earth
- 1937 - J.R.R. Tolkien writes a letter to Charles Furth.
- 1954 - J.R.R. Tolkien writes Letter 144.
- 1985 - A Path from Rome: An Autobiography, which includes a reminiscence of J.R.R. Tolkien, is published.
- 1997 - Tyalië Tyelelliéva issue 10 is published.
 In Arda
- There are no known events for this day.