Does writing have a seasonal rhythm?

I'm addicted to making goals for my writing--little goals (such as, write 2 chapters this week) and big goals (like, finish my first draft by the end of May). So I just sat down and was working on goals for my latest project, and realized that somehow I have hit nearly the same exact schedule and rhythm as last year. I was cranking up on DROUGHT last January, too--aiming to finish a draft by the end of May.

This means I will hopefully be going to my cherished Kindling Words West retreat, in June, with another ream of printed-out novel to edit. That worked out amazingly well last year, so I'm pumped to think I might be installing myself again at a four-foot table with paper, iPod and a stack of flair pens.

It's a strange coincidence, though, for two novels to be following the same calendar, a year apart. Or is it? Does writing have seasonality? Maybe January is always going to be a month that's perfect for launching new drafts, for me... it is, after all, traditionally a time of fresh starts. 

Can't wait to see what I will be up to next January!