MediaWiki:Editnotice-8-Sitenotice

After changing the sitenotice, increment the number at MediaWiki:Sitenotice id. This will cause the sitenotice to display for users who have dismissed the previous notice by pressing the [dismiss] button. If you have made an insignificant change or correction, you may choose to not edit the "Sitenotice id", so that the sitenotice will stay dismissed for users who have pressed the [dismiss] button.

To remove the sitenotice, blank the page. Do not try to remove the sitenotice by using ' ' around the contents of this page, as that results in the [dismiss] button continuing to display.

The sitenotice only appears for logged-in users. Consider editing MediaWiki:Anonnotice, the notice that appears for users who are not logged in.