12 September

Events which occurred on 12 September.

On Earth

• 1931 - Ian Holm, who would voice Frodo Baggins in the BBC radio adaptation and play Bilbo Baggins in The Lord of the Rings: The Motion Picture Trilogy, is born.
• 1960 - J.R.R. Tolkien writes letter 224.
• 1965 - J.R.R. Tolkien writes letters 276 and 277.

In Arda

• T.A. 3018:
  • Gandalf is held captive by Saruman on the pinnacle of Orthanc.
  • Boromir travels towards Rivendell to ask for counsel.