Events that occurred on 19 April.
 On Earth
- 1899 - Nevill Coghill, Inkling, is born.
- 1917 - J.R.R. Tolkien, in revalidation, is assigned to the Humber Garrison, but is not fit enough.
- 1966 - Rayner Unwin writes a letter to J.R.R. Tolkien.
- 1972 - J.R.R. Tolkien writes a letter to Eva Heilborn.
- 1981 - The seventh episode of the 1981 radio series of The Lord of the Rings is aired on BBC Radio 4.
- 2009 - The first e-Book editions of The Lord of the Rings, The Hobbit and The Children of Húrin are published.
- 2012 - Tolkien in East Yorkshire 1917 - 1918 is published.
 In Arda
- There are no known events for this day.