Squash or Zucchini?

Our garden is producing mass quantities of tomatoes. They have been used on a variety of things and we are really enjoying them. Our yellow squash are getting really, really big (one is 16 inches long and 4 inches wide) but have not turned yellow! Upon further research, we decided to go ahead and pick...our zucchini! Apparently the seed tag was mislabeled. Needless to say, I have been baking zucchini bread all morning. Last night we had breaded zucchini and grilled zucchini. Yum!