My friend/neighbor gave me a tiny seedling in late April. Said it was a variety of squash. Here it is today. The squash is a little larger than a softball now in late July. I don't know the variety or how to determine when it's time to cut it from the vine.
SOLVED: What variety of squash
Looks like Sweet Dumpling. These should ideally be cut when vines die down and stems turn brown. The squash continues to ripen and become sweeter when cured.