With the recent release of Fedora 26, the Fedora 27 release schedule is falling into place. Also worth noting, starting with Fedora 27, there is no longer an Alpha release. As of now, the current Fedora 27 release schedule is as follows.

Beta : 2017 September 19th

: 2017 September 19th “Rain” date: 2017 September 26th

Final release : 2017 October 24th

: 2017 October 24th “Rain” date: 2017 October 31st

These dates may change as development on Fedora 27 progresses, so always check the official schedule for the most accurate version of the Fedora 27 schedule.