The Fifteen Year Society is an informal grouping of editors who have been contributing to the Wikipedia project for fifteen years or more (from 18 April 2009 or earlier). It exists so that editors can celebrate a decade-plus of contributing to a project they are passionate about, to help form connections between long-term participants in the encyclopedia, and to allow the sharing of perspectives and expertise. It is not intended as a form of one-upmanship, but as a good-natured recognition of enthusiasm and dedication. The Society currently has roughly 760 members. [update]

Membership, as the name suggests, is simply conditional upon having been an editor for at least fifteen years. In the original spirit of wiki cooperation as it began, membership is entirely optional and freely given. Any editor may suggest membership to or bestow membership upon any qualifying editor, who is welcome to accept or decline it. There is an invitation template that can be used to invite new members.

Members are listed at Category:Members of the Fifteen Year Society of Wikipedia editors. Those who would like to indicate membership in the Society on their user page can use the {{User Fifteen Year Society}} userbox and/or the {{15 Year topicon}}.

• Wikipedia:Five Year Society
• Wikipedia:Ten Year Society
• Wikipedia:Twenty Year Society