This document provides information about Contribution Day at Magento Spain 2019, including details about contributing to open source Magento projects on GitHub. It lists four Magento projects - Magento 2 Core Improvements, GraphQL, Async Import, and Adobe Stock Integration - and provides the GitHub project backlog links for each. It also provides a brief overview of the Adobe Stock Integration project and how the Adobe Stock media marketplace can be accessed from Magento.