Forum:How do I make an universal message

I like to make an announcement on my Wiki site and make it last for a month. How do I get ahold of this special feature? Basicly what I am saying is I want to have a message posted on each wiki post on my wiki site. Once again How do I do that? Sundogs 00:04, 8 January 2007 (UTC)
 * By editing MediaWiki:Sitenotice on your wiki. There is also MediaWiki:Anonnotice for anonymous users, that can be different than MediaWiki:Sitenotice. Szoferka 00:16, 8 January 2007 (UTC)