X-Day may refer to:
*
Malcolm X Day
Malcolm X Day is an American holiday in honor of Malcolm X that is celebrated on either May 19 (his birthday) or the third Friday of May. The commemoration of the civil rights leader has been proposed as an official state holiday in the U.S. sta ...
, a holiday in honor of Malcolm X that is celebrated in May
*
X-Day (Church of the SubGenius)
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 celebrate ...
, a festival associated with the Church of the SubGenius
*
''X-Day'' (manga), a 2002 manga series by Setona Mizushiro
* X-Day, the first day of
Operation Downfall
Operation Downfall was the proposed Allied plan for the invasion of the Japanese home islands near the end of World War II. The planned operation was canceled when Japan surrendered following the atomic bombings of Hiroshima and Nagasaki ...
, the planned Allied invasion of Japan during World War II
* X Day or Day X, the
March 20, 2003 anti-war protest against the Iraq War
*
''X Day'' (musical), a 2010
musical by Akinori Nakagawa
* ''
Yomei Kensaku Sābisu X-Day'', a 1993 Namco arcade game
* X-Day (military terminology), synonym of
D-Day (military term)
The Normandy landings were the landing operations and associated airborne operations on 6 June 1944 of the Allied invasion of Normandy in Operation Overlord during the Second World War. Codenamed Operation Neptune and often referred to as ...
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