On what date did NBC announce The Good Place's final premise?

NBC announced The Good Place’s final premise on May 15, 2016.

The announcement came as NBC unveiled its schedule for the 2016–17 television season. Earlier descriptions of Michael Schur’s project had presented it as an untitled comedy, but the later announcement made the afterlife setting central: Eleanor Shellstrop dies, arrives in a heaven-like community, and discovers that she may have been sent there by mistake.

That premise gave the series its unusual blend of sitcom comedy, fantasy, mystery, and moral philosophy. The show could begin with Eleanor trying to hide her past while learning ethics from Chidi, then gradually expand into a story about accountability, personal change, and whether people can become better.

Several nearby dates can cause confusion. NBC first announced Schur’s untitled comedy on August 13, 2015. D’Arcy Carden’s casting publicity appeared on March 14, 2016, and the network later announced fall premiere information on June 15, 2016. The date in this question refers specifically to the public unveiling of the show’s final afterlife premise, not its initial development or premiere scheduling.