Ember Computed gt for Dates

controllers.application.js

import Ember from 'ember';

const { computed } = Ember;
const { gt } = computed;

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  now: new Date(),
  dateInMay: new Date(2017, 4, 10),
  dateInJuly: new Date(2017, 6, 10),
  
  isDateMoreThanMay: gt('now', new Date(2017, 4, 10)),
  isDateMoreThanJuly: gt('now', new Date(2017, 6, 10))
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{now}}<br />
{{dateInMay}}<br />
{{dateInJuly}},<br />

<br /><br />
{{isDateMoreThanMay}}
{{isDateMoreThanJuly}}
<br>
<br>

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1"
  }
}