Put simply, it's to stay focused. If I truly roll up my sleeves and get into the weeds in February, I will be able to be more efficient and even hit my normal monthly goals, despite the month being 2 or 3 days shorter.
There's so much going on right now, but it's helpful to have external distractions be minimized. February is a quiet month on the personal side of things, which will give me the ability to focus harder and relax more.
So, as I've said in the past, there aren't any 30 day challenges this year. It's all about continuing to challenge myself daily so that I can accomplish what I am planning throughout this year.