HTML5 is Living Standard and a lot of devs even think that it is an umbrella of specs for JS/DOM/CSS/SVG/MathML/etc.
Are there any historical reference / changelog for HTML5 (as umbrella)? More precisely I look for date/time log about spec status/version/fixes changes.
PS Question is not about http://caniuse.com/ but about standard committees activity ))
There are actually 2 HTML specs, the W3C spec and the WHATWG living standard. Much like the browsers themselves, while differences in the specs may be a little confusing, multiple specs help push the web forward. Both are used as references for browser implementations.
I don't know about history on the W3C spec but WHATWG hosts theirs on GitHub so you can look at the commit history.