not standard date.toString() format about hermes

[danilobuerger]

@mhorowitz The ES6 spec states:

Return an implementation-dependent String value that represents tv as a date and time in the current time zone using a convenient, human-readable form.

A string in ISO 8601 isn't really a "convenient, human-readable form". So, arguably, this is not spec compliant.

[mhorowitz]

Our current implementation matches the ES6 spec, which allows the implementation a lot of flexibility. But, ES9 is more strict, and requires output like the familiar form you show.

We'll work on updating our implementation, but until then, (new Date).toLocaleString() may give you something more friendly to your purpose.

[avp]

The ES9.0 compliant version of Date.prototype.toString was added in a38ec5f.

[ljharb]

(ES2018; the edition number isn't used after ES6 / ES2015)