Indie Book Day has been created in 2013, by German independent publishers ; since last year, it is celebrated in other countries, thanks to independent publishers collectives and the Alliance.
Manual : the third Sunday of March, readers are invited to go in an independent bookshop, buy a book published by an independent publisher, and publish a picture of the book on the social networks, with hashtag #indiebookday. Booksellers and publishers can then organize a common campaign to prepare the event, for their communities to be aware of this event (posters in the bookshops, information on social networks and websites etc.).
Find here the logos of the Indie Book Day and here the official page of the Indie Book Day.