Events that occurred on 1 October.
 On Earth
- 1914 - Donald A. Wollheim is born.
- 1924 - J.R.R. Tolkien begins his Professorship of English Language at the University of Leeds.
- 1976 - Oxonmoot 1976 at The Welsh Poney.
- 1979 - The Jackanory episode "An Unexpected Party" is aired on the BBC.
- 1999 - Voice actor Noel Johnson dies.
- 2003 - The Gospel According to Tolkien is published.
- 2007 - The second and expanded edition of Tolkien On Fairy-stories is published.
- 2007 – The redesigned slipcased edition of Mr. Bliss is published.
- 2010 - Middle-earth: Visions of a Modern Myth is published.
- 2010 - Jubilee for Mithlond, the Gothenburg Tolkien Society of Sweden.
 In Arda
- T.A. 3018:
- T.A. 3019:
- Full moon