What is "x-day"

is a two book manga written by Setona Mizushiro. It is about three high school students and a teacher, who meet online and form a plan to blow up their school.

X-Day is a traditional part of the Church of the SubGenius, a religion formed as a parody of cults and extreme religious groups, and their pamphlets and claims. X-Day fell on July 5, 1998, the scheduled " end of the world", and has been celebrated on July 5 each year since then. From its inception in 1980, the Church had prophesied that an army of alien invaders (known as the "X-ists" or "Men From Planet X") would land on the planet Earth and destroy the world of "normals", "pinks", and "glorps," while the members of the Church of the SubGenius would be rescued by the aliens and taken away into space. Chapters 10 and 11 of Revelation X: The "Bob" Apocryphon supplies additional details as to the precise kinds of fates which supposedly await the "pinks" and "normals" (as well as SubGenii who have not paid their membership fees) left behind when X-Day comes, saying, among other things, that those who are not immediately killed by the aliens will be enslaved by a society of evil clowns known as the "Bozo Cult" until eventually their souls are devoured by the Elder Gods. The book also tells readers that if they want more information, they should send one million dollars to Ivan Stang so that he can remake his 1973 film Let's Visit the World of the Future.

X-Day may refer to:

• Malcolm X Day
• X-Day (Church of the SubGenius), a festival associated with the Church of the SubGenius
• X-Day (manga), a 2002 manga written by Setona Mizushiro
• March 20, 2003 anti-war protest, a protest against the Iraq War
• The first day of Operation Downfall, the planned Allied invasion of Japan during World War II
• X Day (musical), a musical by Akinori Nakagawa