Depends who you talk to
.....some folks count from flip and some count from first pistils since flip....the numbers they give kind of like when a cars sticker says 17MPG city, so many variables so it is a ballpark number. They ready when they want to be ready
but IMHO you probably have at least 2 weeks and probably 3 or more to go still. If you can get it a little cooler at night it may bring out some colors (depends on the phenotype too though), as Outdoor plants it does that when Fall is coming in most parts of the world, not critical but it seems to make them more "colorful", though many of us don't have ways of controlling the temps depending on where they are located. I've just noticed that with my Blue Widow as I have been running clones of clone of the clone and time of year with my setup affects how much color they bring out (still get he color but it varies on degree and they all off the same plant so same phenotype).
Examples of color difference:
One I harvested in September:
And one of her offspring I harvested in December: