Portal:Speculative fiction/Anniversaries/May/May 31

May 31:

Book releases
 * 1986 - Legend of the Galactic Heroes volume 7, by Yoshiki Tanaka
 * 1987 - Legend of the Galactic Heroes volume 9, by Yoshiki Tanaka

Television series
 * 1997 - Dark Skies, a government UFO conspiracy theory-based sci-fi drama television series, finishes airing on NBC

Births
 * 1914 - Jay Williams (d. 1978), an American science fiction and history author

Anniversaries and events
 * 2005 - Improbable Fiction, a play by British playwright Alan Ayckbourn