Challenges run for FOUR WEEKS with a planning week before every challenge. *However, the first challenge of the year will be 5 weeks instead of 4. You can start this challenge January 1st OR anytime in the first week of January (really, you can start any challenge anytime within the challenge dates, you'll just have a shorter challenge). This will allow current members who are ready to start January 1st start then, but offer some flexibility for those of you who are new to Nerd Fitness or are traveling or finishing up with holiday stuff still on the 1st. Start any date you want. You are allowed to start early, during the planning week, if you do not need the full week to plan, or if you want a longer challenge. The challenges start on Monday and go to Sunday. (this is a change in 2018) If you do better starting on Sunday and going until Saturday - that's fine There is a 2 week break in between the 5th and 6th challenges - this is our summer break. During this time, if you want to continue to challenge, you can start your next challenge early or continue your previous challenge. The challenge forums for the next challenge will be opened the day after the last challenge ends, on the next Monday. January 1 to February 4: Challenge 1 Feb 12 to March 11: Challenge 2 March 19 to April 15: Challenge 3 April 23 to May 20: Challenge 4 May 28 to June 24: Challenge 5 July 9 - August 5: Challenge 6 August 13 to September 9: Challenge 7 September 17 to October 14: Challenge 8 October 22 to November 18: Challenge 9 November 26 to December 23: Challenge 10