Actually, W3C published a number of HTML specs under the "HTML 5" moniker beginning in 2014 ([html5]) until 2017 ([html52]) based on (the loose group of people

Actually, W3C published a number of HTML specs under the "HTML 5" moniker beginning in 2014 ([html5]) until 2017 ([html52]) based on (the loose group of people on github mostly working for Google on Chrome called) WHATWG's HTML specs. From 2020 on W3C again attempted to publish WHATWG snapshots, without redaction this time around; the January, 2020 snapshot ([html2001]) is the only one that made it into a W3C recommendation under that process, while later snapshots were rejected and simply no new snapshot was reviewed by W3C, Inc.'s HTML working group since (whose chapter is closing down these days last I checked). [is-this-html6] has the details, but in a nutshell, the so-called "HTML5 outlining algorithm" spec, one of Ian Hickson's innovations going along with "main", "header", and "footer" elements and the concept of sectioning roots that never was implemented/honored in browsers was removed by Steve Faulkner going to great lengths editing the upstream WHATWG HTML spec. So in this sense, as is argued by the linked blog post, "HTML 5" refers to those W3C specs, while "HTML 2020" could refer to later specs. [html5]: https://www.w3.org/TR/2014/REC-html5-20141028/ https://www.w3.org/TR/2014/REC-html5-20141028/ [html52]: https://www.w3.org/TR/2017/REC-html52-20171214/ https://www.w3.org/TR/2017/REC-html52-20171214/ [html2001]: https://html.spec.whatwg.org/review-drafts/2020-01/ https://html.spec.whatwg.org/review-drafts/2020-01/ [is-this-html6]: https://sgmljs.net/blog/blog2303.html https://sgmljs.net/blog/blog2303.html