As a reminder:
The 6 Week Challenge is a challenge to upgrade your language skills in one language from beginner to something more worthwhile, and to see if you can find more time to study languages when competing with other participants in a global highscore. 6 Week Challenges start on February 1st, May 1st, August 1st and November 1st every year, so there is a rough 6 weeks on / 6 weeks off pattern. Note that you can only do the 6 Week Challenge with a language that you're a beginner at or lower-intermediate at most. This allows for a more just comparison between participants.
How to register:
http://6wc.learnlangs.com/howto
Scores:
http://6wc.learnlangs.com
Best of luck!
(Personally, I'll be working on Hebrew for this challenge as my beginner level language.)