Go 1.16 release date
Go 1.16 is expected to be released in February 2021.
UPDATE: Go 1.16 releasing on 16-10-2021
The beta version of Go 1.16 has been released.
You can try the new features in Go 1.16 version by updating to beta version as explained in above article.
For the latest changes in Go 1.16, go through the release notes draft.