I remember my wife looking for a web dev position in early 2015 and at one place they were adamant that 5 years of HTML5 in experience was mandatory.
Wikipedia says:
On 28 October 2014, HTML5 was released as a W3C Recommendation,[32] bringing the specification process to completion.
Edit: I know the spec was a work in progress since 2008 but it’s still kind of a ridiculous requirement. To put it in to perspective, my wife’s class was the first year that they trained on Html5 instead of 4.
You see though, this is completely Torontos fault because they chose not to elect Doug Ford as mayor in 2014 and he’s a childish, vindictive cunt.