Yep, that's today, the September 16th, an annual day to celebrate Free Software, GNU/Linux and the awesome community that surrounds it.

The homepage of the event is at http://softwarefreedomday.org/ and you can see international teams here: http://softwarefreedomday.org/teams

If you are doing anything interesting today to mark the day and celebrate you could share it with us here. One good way to mark the day is to convert someone to GNU/Linux, as many as you can.

Cheers!