SCREAMS!!!

People can always go back to work on months they've missed, so there's no stress if you don't keep up. Also, you can work on past months if you want to finish 12 consecutive months much faster.

The prizes are great! For just 1 year, you get 2 exclusive MBs and a guaranteed 5 community MBs from the Newsfeed Celebrations, but people usually get 10-15 MBs.

Do every month since the beginning (at whatever speed suits you) and get amazing prizes when the Giant January Celebration rolls around. This year each celebrant got 555,555 GPs (for doing 5 years of the challenge), their very own exclusive MB they designed and get to keep (I paid the 500k fee), 100 MBs (in progress), a useful review of a super long item such as a novel, and lots of other goodies.

Join the fun! Your old entries never expire, so if you quit 1 month before you finish, you can come back even years later and do that 1 month to be celebrated.