Question: Harry Styles is the debut studio album by English singer and songwriter Harry Styles, it was preceded by the release of its lead single, "Sign of the Times", released on which date?
Sentence (from "Sign of the Times (Harry Styles song)"): Released on 7 April 2017, by Erskine and Columbia Records, it was written by Styles, Ryan Nasci, Mitch Rowland and its producers Jeff Bhasker, Tyler Johnson, and Alex Salibian.
Relevant evidence: Yes