Star Wars Day on May 4, 1979, the day Margaret Thatcher took office as Prime Minister of the United Kingdom. An online news article from the Danish public broadcaster says her political party, the Conservatives, placed a congratulatory advertisement in "The London Evening News", saying "May the Fourth Be with You, Maggie. Congratulations." The saying was used in a UK Parliament defence debate on May 4, 1994. Astrophysicist and author Jeanne Cavelos used the saying on page 94 of her 1999 book "The Science of Star Wars". In 2008, the first Facebook groups appeared, celebrating "Luke Skywalker Day," with the same catchphrase. While
Star Wars: Dark Forces produced Kyle Katarn and Dark Trooper toys, which are among the [[Star Wars expanded universe|"Star Wars" expanded universe]] items to be turned into [[action figure]]s. The Dark Troopers were also included in books and comics. [[William C. Dietz]]'s novelizations of the "Dark Forces" storyline were adapted to full-cast audio dramatizations. LucasArts extended "Dark Forces" with "[[Star Wars Jedi Knight: Dark Forces II]]" in 1997, and later two more sequels. The [[Star Wars: Jedi Knight (series)|"Jedi Knight" series]] continues the story of Kyle Katarn and has been praised for its quality as a whole. In September 2009, "Dark Forces" was re-released