This template should be used at the top of the article to signify that it hasn't yet been released. If you notice an article using this template even though it has been released, please remove the template reference.
If this template is for an unreleased system, include the "system" parameter: {{future|system|Date}}. Otherwise, it will be treated as if for an unreleased game.
Note to editors of this template: please don't fiddle with the ParserFunctions reference unless you know what you're doing. It is referenced here so that the source is only displayed if it is passed.