Hello Felis, we have on this page Lodestone made ​​some presentations. In the first presentation ("Overview of the re-launch version of Final Fantasy XIV") can be found on the last page of the information that the beta is planned for September and October.
From the German Dev post.. Most likely Google Translate is playing tricks.. but if not that would mean PC beta is only 2 months long, and we be play 2.0 1 month sooner than I thought.. :P.