From Fedora Project Wiki

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.

Software Freedom Day in Natal, Brazil

This year of 2013, at the third week of September, SFD will also take place in Natal, Brazil.

Who is organizing it?

The PotiLivre Free Software community is in charge of organizing the Software Freedom Day in Natal, Brazil, this year. Representing Fedora, are two co-founders of this community who happen to be Fedora Ambassadors, Marcel Ribeiro Dantas and Amador Pahim.

Soon more information.