The title says it all. The Document Freedom Day “celebrates the importance of Open Standards for all electronic documents, whether public or private”. And these are the reasons why all Catholics, and all Christians in general, should promote this kind of event and take an active part in it: November 2005: Free Software’s surprising sympathy with Catholic doctrine April 2006: The Elèutheros Manifesto Aprile 2013: Catholics and the Openness Revolution Open