Windows 8.1 release date announced (via “Blogging Windows”)
The Windows 8.1 availability date has been announced publicly on http://blogs.windows.com/windows/b/bloggingwindows/archive/2013/08/14/mark-your-calendars-for-windows-8-1.aspx
Starting at 12:00am on October 18th in New Zealand (that’s 4:00am October 17th in Redmond), Windows 8.1 will begin rolling out worldwide as a free update for consumers on Windows 8 through the Windows Store. Windows 8.1 will also be available at retail and on new devices starting on October 18th by market.