Intl.DateTimeFormat('en-NZ')

Chrome's implementation of Intl seems to assume that en-NZ's date formatting style is the same as en-US.

HTML

<div></div>

JavaScript

(function () {
    'use strict';

	var el = document.querySelector('div');
  
  el.innerHTML = JSON.stringify(Intl.DateTimeFormat().resolvedOptions());
}());