When are maxima squash ripe?

Its been a wild year here in the garden. Some things are stunted and slow, some are way ahead of schedule.

I planted maxima squash for the first time, plus moshata and pepo. In previous years my squash harvesting technique had been "Oh no, its gonna frost, harvest everything".
This year, its July, and several of my maxima squadh (Sunshine F1) are bright orange and hardening already even as the first of the pepo squash are just starting to form and I am eating my first cherry tomatoes.. the one moshata (butternut) is already full sized and slowly changing colour, as is my other maxima (Blue Magic F1).

How do I know when they can be picked?

The simple test I know of that I use for winter storing types of squash is the fingernail test. When the squash are mature, the skin on them will get very hard. I can press my thumbnail into the skin of immature squash and it'll leave a mark, or sometimes break the skin. When they are mature, it's much more difficult to press a thumbnail mark into the skin of the squash. Hope this helps!

I've noticed the vine and tendrils nearest the fruit will change color and start to die down when it's ripe.