Events that occurred on 12 June.
 On Earth
- 1925 - J.R.R. Tolkien writes a letter to a Mr. Ashton.
- 1932 - Actor Michael Elsworth is born.
- 1967 - Donald Swann and William Elvin record the music for The Road Goes Ever On.
- 2002 - The Art of The Fellowship of the Ring is published.
- 2007 - The fan film The Peril to the Shire premières to a private audience.
- 2015 - Parma Eldalamberon 22 is published.
 In Arda
- There are no known events for this day.