How much time do I have left before I can harvest ...

Hello ! The best way to know if your plant is ready is to use a magnifier/loupe to watch at the trichomes , the trichomes ratio will tell you if your plant is ready or not and you will be abble to choose the kind of effect your prefer , let me explain : You have 3 time to havest , 1st when the trichomes are mostly clear and milky then you will have a clear effet and energetic high ,2nd if your trichomes are mostly milky then you will have a mixed balanced effect (it's better for you as the skunk is a sativa/indica hybrids) and 3rd if your trichomes are mostly milky & amber then you will have a big stone. But in your case if you don't have the time to buy a magnifier you can (I don't recommend it) wait for a week or 10 days more than the breeder told you , in your case you will chop around day 57-60. I hope it will help you 👍😁