Events that occurred on 19 March
 On Earth
- 1884 - Philologist Elias Lönnrot, who compiled the Kalevala, dies.
- 1918 - J.R.R. Tolkien attends a medical board examination. 9th Royal Defence Corps at Easington is disbanded and a Tolkien is to be based at Thirtle Bridge again.
- 1956 - J.R.R. Tolkien writes Letter 185.
- 1989 - Heren Hyarmen is founded by Ronald Kyrmse in São Paulo, Brazil. On 9 January 2003, the name was changed to "Heren Hyarmeno", the correct Quenya genitive to mean "Order of the South".
- 2000 - Voice actor Fraser Kerr dies.
- 2013 - La Conexion Española de J.R.R. Tolkien is published in Spain.