In case it wasn't immediately obvious, there's a Stage 2 tc39 proposal that was spawned from this blog post called Temporal:

https://github.com/tc39/proposal-temporal

At a glance, it does follow the same ideas as the great Joda Time library (now a part of the Java standard library), and there's currently a port of this library for JS which is quite nice:

https://github.com/js-joda/js-joda