Many CMS' have news on the front page, where e.g. the sysop/webmaster posts about down time and other important news.Often these can be scheduled, so that you e.g. write on Monday, and wants it to be visible  from Tuesday to Friday.QuestionDoes MediaWiki have something like that?
Does MediaWiki have a News extension?
mediawiki
Yes, you can use the #switch function to do this. There are some examples on this article - generating dynamic content with mediawiki.The documentation on #switch is here: http://www.mediawiki.org/wiki/Help:Extension:ParserFunctions#.23switch