There is no link, because there is no post. This is because any time a dev (any dev for any company) gives dates, people treat it as gospel. And if that date is missed, even by the smallest fraction people scream foul. So you won't see a date till they are 100% sure, and that probably won't be till a week out or less.
Also, I'm guessing you're one of those people.
The date we have is the best guess of the community. 1.1.5 hits on the 6th. Most are guessing 1.2 hits the PTS shortly after that, then goes live on the 20th or 27th.