http://www.techradar.com/news/microsoft-announces-the-windows-10-fall-creators-update-will-be-out-next-month

At IFA 2017, Microsoft announced the Windows 10 Fall Creators update will release on October 17.

We’ve known the fourth major update for Windows 10 coming later this year and with a name that starts with Fall, it was pretty easy to predict which season it would release in, but now we have an exact firm date.