Awesome, Molly! Winter Solstice is the recommended start time for wintersowing, and that's about right for most zones. Typically I can't even think about it till after the holidays, so sometime in January is when I start. I imagine that would work just fine for you as well.
"...and don't think the garden loses its ecstasy in winter. It's quiet, but the roots are down there riotous." Rumi