The 28th of each month. So our first challenge will be for the month of October, and not due until the 28th of October. The new challenges will be assigned on the same day. This means for the first challenge you guys will have 6 weeks to complete it, with 30 days for each subsequent challenge. I'm hoping the slow place will encourage more people to participate, and also allow people to spend more time on their works. 

If the majority agrees for a faster pace, we can just bump it to a challenge every 3 weeks.

We'll also be taking turns assigning the subject / theme for the challenge.