Category:Featured articles that have appeared on the main page once

This category holds all of Wikipedia's Featured articles (or former featured articles) that have been featured on the Main Page exactly once. Articles are added to this category by the {{Article history}} template, if the |maindate= parameter is set (and in the past) and no |maindate2= parameter is set. The |maindate= parameter should only be added for featured articles (or former featured articles) that have been approved for the main page. See also: Category:Featured articles that have not appeared on the main page and Category:Featured articles that have appeared on the main page twice