Software Freedom Day

"SFD is a worldwide celebration of Free and Open Source Software (FOSS). Our  goal in this celebration is to educate the

worldwide public about the  benefits of using high quality FOSS in education, in government, at  home, and in business -- in short, everywhere! The non-profit  organization Software Freedom International  coordinates SFD at a global level, providing support, giveaways and a  point of collaboration, but volunteer teams around the world organize  the local SFD events to impact their own communities."

More details at http://www.softwarefreedomday.org/