An Edit-a-thon is a community organized event that aims to teach folks how to edit, update, and add articles on Wikipedia. These events take place year-round at museums, coffee shops, colleges, and community centers.
Art and Feminism (stylized as Art+Feminism) is an annual worldwide edit-a-thon to add content to Wikipedia about female artists and designers. The project has been described as "a massive multinational effort to correct a persistent bias in Wikipedia, which is disproportionately written by and about men".
Art+Feminism's annual campaign attract thousands of volunteers at hundreds of separate events internationally.