On Wikipedia, there are pages called special pages. See Wikipedia:Special pages for a list and an explanation of them.

A special is a television program that is designated by a television network as being particularly noteworthy or unique. Whether the viewing audience considers the program to be special is another matter, and it is not uncommon for a network to use the term special in order to hype what would otherwise be a little watched program. In general, specials are single programs.

See also

• Very special episode