Indie Book Day was created in 2013, by German independent publishers ; since last year, it has been celebrated in other countries, thanks to independent publishers collectives and the Alliance.
How it works : On the third Sunday of March, readers are invited to visit an independent bookshop, buy a book published by an independent publisher, and post a picture of the book on social media with the hashtag #indiebookday. Booksellers and publishers can then organize a common campaign ahead of the event, to inform their communities (posters in the bookshops, information on social media and websites, etc.).
Find here Indie Book Day logos and more information on the official Indie Book Day website.