When the ground warms up in spring to as late as the end of July. Sometimes people think "winter squash" means you can grow it through the winter. Not true. It's still a squash and dies when you get freezes. It's just that it is slow growing, meaning you will pick the last just in time to save it from freezes, and hard shelled, meaning it keeps for a long time. So you can be eating garden grown winter squash through the winter.
It looks like you are probably in Zone 7. Here's a planting schedule that should work for you:
Thanks for the info. The term Winter Squash was what had me confused.Thanks for clearing that up for me. That is a good website. I will refer to it often.