Software Freedom Day
Software Freedom Day 2014, 14 september
is a global celebration and education of why transparent and sustainable technologies are now more important than ever. With over 200 teams in 60 countries participating, it is a fantastic event to get your schools and communities involved in. Go along to your local event or start your own event and meet a wide range of people, all working together to help ensure our freedoms are maintained by the technologies of tomorrow.
Source and more info : Software Freedom Day website