GNOME 3.36 will be released on March 11, 2020.
This date, along with other key dates in the GNOME 3.36 development cycle — technically GNOME 3.35 as only stable releases use even numbers — is revealed in the official GNOME 3.36 release schedule up on the GNOME wiki.
The first GNOME 3.36 development snapshot, aka GNOME 3.35.1, is scheduled for release on October 12, 2019. A second development snapshot, GNOME 3.35.2, follows on November 23, 2019.
More notable, the first GNOME 3.36 beta is tabled in for release at the beginning of February, with a second beta release arriving two weeks later, on February 15, 2020.
A sole GNOME 3.36 release candidate will launch — somewhat notably given that 2020 is a leap year — on February 29.
But the final, stable GNOME 3.36 release is set for March 11, 2020. This is the release that you, me and GNOME will be making lots of noise about.
The first point release in the GNOME 3.36 series will appear a few weeks later.
Right now there’s little, if any, detail on what we can expect in GNOME 3.36, but one expects more performance efforts, theme tweaks, and possible a few major app revamps (and I continue to hold out hope for the redesigned login screen experience).