2 Wheeler Customs: Year cycling goals - time for a new one?

Just finished my first challenge.  120 miles in 30 days, but I managed it in 18! 

Really like the idea of doing the 2500 miles per year challenge to keep me going through the cold winter months, but the listed challenge only seems to run from January.  (I'm not superman - 2500 miles in 3 months would probably do me in!) 

 I'd love to put on a new challenge for the same distance, but I dont seem to be able to set one up.  Can someone set up one to start from November?

Pete Husky, Leics, United Kingdom