Gatsby Days, initially planned as a live digital event, was transformed into a content series to maintain focus on the Black Lives Matter movement while still sharing valuable information from scheduled speakers. The series includes a video presentation by Sam Julien, a Senior Developer Advocate Engineer at Auth0, who demonstrates how to build a Gatsby Recipe for setting up authentication in Gatsby applications. While Gatsby is often seen as a static site generator, it is actually a dynamic framework that supports features like authentication, differing slightly from React in its implementation. Sam's demonstration includes using React Context with mock values to prevent build errors and employing gatsby-browser.js and gatsby-node.js for handling authentication providers and DOM API objects. Gatsby Days plans for October were mentioned, with details to be announced on Twitter.