Events that occurred on 18 February.
 On Earth
- 1937 - J.R.R. Tolkien's poem "Knocking at the Door" is published in The Oxford Magazine.
- 1938 - J.R.R. Tolkien writes Letter 24.
- 1944 - Narrator Anthony Jackson is born.
- 1991 – The final day of the first "Colloquium on the Languages of Middle-earth" at the house of E.L.F. member Bill Welden.