Ronney:Artyn bentyn rish çhengaghyn as dateyn gyn bree mychione earroo ny loayreyderyn

Ta'n ronney shoh currit da reagheydys Wikipedia, cha nel eh ny ayrn jeh'n chicklipaid hene. Ta duillagyn ayn nagh vel nyn artyn, as vel eh çhaglym artyn rere stayd, cha nel cooid. Ny gow stiagh y ronney shoh ayns ronnaghyn cooid; jeeagh er WP:PROJCATS. Ta'n ronney shoh follit er ny duillagyn oltey oc, mannagh vel y tosheeeaght ymmydeyr kiart reiht oc.

This category is triggered if something other than a purely numerical value is entered in the date field of a language infobox. (Note that this does not happen if a merely unlikely date is entered.) An invalid input affects the display of the infobox as well as its ability to detect obsolete data.

Entering 'NA' or 'no date' in the date field triggers a subcategory. Though it does not cause any problems with display, it does prevent the obsolescence calculation.